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git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock revert from Mike Rapoport:
"Revert 'mm: Always release pages to the buddy allocator in
memblock_free_late()'
The pages being freed by memblock_free_late() have already been
initialized, but if they are in the deferred init range,
__free_one_page() might access nearby uninitialized pages when trying
to coalesce buddies, which will cause a crash.
A proper fix will be more involved so revert this change for the time
being"
* tag 'fixes-2023-02-11' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Paolo Abeni:
"Including fixes from can and ipsec subtrees.
Current release - regressions:
- sched: fix off by one in htb_activate_prios()
- eth: mana: fix accessing freed irq affinity_hint
- eth: ice: fix out-of-bounds KASAN warning in virtchnl
Current release - new code bugs:
- eth: mtk_eth_soc: enable special tag when any MAC uses DSA
Previous releases - always broken:
- core: fix sk->sk_txrehash default
- neigh: make sure used and confirmed times are valid
- mptcp: be careful on subflow status propagation on errors
- xfrm: prevent potential spectre v1 gadget in xfrm_xlate32_attr()
- phylink: move phy_device_free() to correctly release phy device
- eth: mlx5:
- fix crash unsetting rx-vlan-filter in switchdev mode
- fix hang on firmware reset
- serialize module cleanup with reload and remove"
* tag 'net-6.2-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (57 commits)
selftests: forwarding: lib: quote the sysctl values
net: mscc: ocelot: fix all IPv6 getting trapped to CPU when PTP timestamping is used
rds: rds_rm_zerocopy_callback() use list_first_entry()
net: txgbe: Update support email address
selftests: Fix failing VXLAN VNI filtering test
selftests: mptcp: stop tests earlier
selftests: mptcp: allow more slack for slow test-case
mptcp: be careful on subflow status propagation on errors
mptcp: fix locking for in-kernel listener creation
mptcp: fix locking for setsockopt corner-case
mptcp: do not wait for bare sockets' timeout
net: ethernet: mtk_eth_soc: fix DSA TX tag hwaccel for switch port 0
nfp: ethtool: fix the bug of setting unsupported port speed
txhash: fix sk->sk_txrehash default
net: ethernet: mtk_eth_soc: fix wrong parameters order in __xdp_rxq_info_reg()
net: ethernet: mtk_eth_soc: enable special tag when any MAC uses DSA
net: sched: sch: Fix off by one in htb_activate_prios()
igc: Add ndo_tx_timeout support
net: mana: Fix accessing freed irq affinity_hint
hv_netvsc: Allocate memory in netvsc_dma_map() with GFP_ATOMIC
...
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When set/restore sysctl value, we should quote the value as some keys
may have multi values, e.g. net.ipv4.ping_group_range
Fixes: f5ae57784ba8 ("selftests: forwarding: lib: Add sysctl_set(), sysctl_restore()")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/20230208032110.879205-1-liuhangbin@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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iproute2 does not recognize the "group6" and "remote6" keywords. Fix by
using "group" and "remote" instead.
Before:
# ./test_vxlan_vnifiltering.sh
[...]
Tests passed: 25
Tests failed: 2
After:
# ./test_vxlan_vnifiltering.sh
[...]
Tests passed: 27
Tests failed: 0
Fixes: 3edf5f66c12a ("selftests: add new tests for vxlan vnifiltering")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Link: https://lore.kernel.org/r/20230207141819.256689-1-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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These 'endpoint' tests from 'mptcp_join.sh' selftest start a transfer in
the background and check the status during this transfer.
Once the expected events have been recorded, there is no reason to wait
for the data transfer to finish. It can be stopped earlier to reduce the
execution time by more than half.
For these tests, the exchanged data were not verified. Errors, if any,
were ignored but that's fine, plenty of other tests are looking at that.
It is then OK to mute stderr now that we are sure errors will be printed
(and still ignored) because the transfer is stopped before the end.
Fixes: e274f7154008 ("selftests: mptcp: add subflow limits test-cases")
Cc: stable@vger.kernel.org
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A test-case is frequently failing on some extremely slow VMs.
The mptcp transfer completes before the script is able to do
all the required PM manipulation.
Address the issue in the simplest possible way, making the
transfer even more slow.
Additionally dump more info in case of failures, to help debugging
similar problems in the future and init dump_stats var.
Fixes: e274f7154008 ("selftests: mptcp: add subflow limits test-cases")
Cc: stable@vger.kernel.org
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/323
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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comprehensive
We have two IS1 filters of the OCELOT_VCAP_KEY_ANY key type (the one with
"action vlan pop" and the one with "action vlan modify") and one of the
OCELOT_VCAP_KEY_IPV4 key type (the one with "action skbedit priority").
But we have no IS1 filter with the OCELOT_VCAP_KEY_ETYPE key type, and
there was an uncaught breakage there.
To increase test coverage, convert one of the OCELOT_VCAP_KEY_ANY
filters to OCELOT_VCAP_KEY_ETYPE, by making the filter also match on the
MAC SA of the traffic sent by mausezahn, $h1_mac.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230205192409.1796428-2-vladimir.oltean@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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memblock_free_late()."
This reverts commit 115d9d77bb0f9152c60b6e8646369fa7f6167593.
The pages being freed by memblock_free_late() have already been
initialized, but if they are in the deferred init range,
__free_one_page() might access nearby uninitialized pages when trying to
coalesce buddies. This can, for example, trigger this BUG:
BUG: unable to handle page fault for address: ffffe964c02580c8
RIP: 0010:__list_del_entry_valid+0x3f/0x70
<TASK>
__free_one_page+0x139/0x410
__free_pages_ok+0x21d/0x450
memblock_free_late+0x8c/0xb9
efi_free_boot_services+0x16b/0x25c
efi_enter_virtual_mode+0x403/0x446
start_kernel+0x678/0x714
secondary_startup_64_no_verify+0xd2/0xdb
</TASK>
A proper fix will be more involved so revert this change for the time
being.
Fixes: 115d9d77bb0f ("mm: Always release pages to the buddy allocator in memblock_free_late().")
Signed-off-by: Aaron Thompson <dev@aaront.org>
Link: https://lore.kernel.org/r/20230207082151.1303-1-dev@aaront.org
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
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Pull kvm fixes from Paolo Bonzini:
"ARM64:
- Yet another fix for non-CPU accesses to the memory backing the
VGICv3 subsystem
- A set of fixes for the setlftest checking for the S1PTW behaviour
after the fix that went in ealier in the cycle"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: selftests: aarch64: Test read-only PT memory regions
KVM: selftests: aarch64: Fix check of dirty log PT write
KVM: selftests: aarch64: Do not default to dirty PTE pages on all S1PTWs
KVM: selftests: aarch64: Relax userfaultfd read vs. write checks
KVM: arm64: Allow no running vcpu on saving vgic3 pending table
KVM: arm64: Allow no running vcpu on restoring vgic3 LPI pending status
KVM: arm64: Add helper vgic_write_guest_lock()
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git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 fixes for 6.2, take #3
- Yet another fix for non-CPU accesses to the memory backing
the VGICv3 subsystem
- A set of fixes for the setlftest checking for the S1PTW
behaviour after the fix that went in ealier in the cycle
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"25 hotfixes, mainly for MM. 13 are cc:stable"
* tag 'mm-hotfixes-stable-2023-02-02-19-24-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (26 commits)
mm: memcg: fix NULL pointer in mem_cgroup_track_foreign_dirty_slowpath()
Kconfig.debug: fix the help description in SCHED_DEBUG
mm/swapfile: add cond_resched() in get_swap_pages()
mm: use stack_depot_early_init for kmemleak
Squashfs: fix handling and sanity checking of xattr_ids count
sh: define RUNTIME_DISCARD_EXIT
highmem: round down the address passed to kunmap_flush_on_unmap()
migrate: hugetlb: check for hugetlb shared PMD in node migration
mm: hugetlb: proc: check for hugetlb shared PMD in /proc/PID/smaps
mm/MADV_COLLAPSE: catch !none !huge !bad pmd lookups
Revert "mm: kmemleak: alloc gray object for reserved region with direct map"
freevxfs: Kconfig: fix spelling
maple_tree: should get pivots boundary by type
.mailmap: update e-mail address for Eugen Hristev
mm, mremap: fix mremap() expanding for vma's with vm_ops->close()
squashfs: harden sanity check in squashfs_read_xattr_id_table
ia64: fix build error due to switch case label appearing next to declaration
mm: multi-gen LRU: fix crash during cgroup migration
Revert "mm: add nodes= arg to memory.reclaim"
zsmalloc: fix a race with deferred_handles storing
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from bpf, can and netfilter.
Current release - regressions:
- phy: fix null-deref in phy_attach_direct
- mac802154: fix possible double free upon parsing error
Previous releases - regressions:
- bpf: preserve reg parent/live fields when copying range info,
prevent mis-verification of programs as safe
- ip6: fix GRE tunnels not generating IPv6 link local addresses
- phy: dp83822: fix null-deref on DP83825/DP83826 devices
- sctp: do not check hb_timer.expires when resetting hb_timer
- eth: mtk_sock: fix SGMII configuration after phylink conversion
Previous releases - always broken:
- eth: xdp: execute xdp_do_flush() before napi_complete_done()
- skb: do not mix page pool and page referenced frags in GRO
- bpf:
- fix a possible task gone issue with bpf_send_signal[_thread]()
- fix an off-by-one bug in bpf_mem_cache_idx() to select the right
cache
- add missing btf_put to register_btf_id_dtor_kfuncs
- sockmap: fon't let sock_map_{close,destroy,unhash} call itself
- gso: fix null-deref in skb_segment_list()
- mctp: purge receive queues on sk destruction
- fix UaF caused by accept on already connected socket in exotic
socket families
- tls: don't treat list head as an entry in tls_is_tx_ready()
- netfilter: br_netfilter: disable sabotage_in hook after first
suppression
- wwan: t7xx: fix runtime PM implementation
Misc:
- MAINTAINERS: spring cleanup of networking maintainers"
* tag 'net-6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (65 commits)
mtk_sgmii: enable PCS polling to allow SFP work
net: mediatek: sgmii: fix duplex configuration
net: mediatek: sgmii: ensure the SGMII PHY is powered down on configuration
MAINTAINERS: update SCTP maintainers
MAINTAINERS: ipv6: retire Hideaki Yoshifuji
mailmap: add John Crispin's entry
MAINTAINERS: bonding: move Veaceslav Falico to CREDITS
net: openvswitch: fix flow memory leak in ovs_flow_cmd_new
net: ethernet: mtk_eth_soc: disable hardware DSA untagging for second MAC
virtio-net: Keep stop() to follow mirror sequence of open()
selftests: net: udpgso_bench_tx: Cater for pending datagrams zerocopy benchmarking
selftests: net: udpgso_bench: Fix racing bug between the rx/tx programs
selftests: net: udpgso_bench_rx/tx: Stop when wrong CLI args are provided
selftests: net: udpgso_bench_rx: Fix 'used uninitialized' compiler warning
can: mcp251xfd: mcp251xfd_ring_set_ringparam(): assign missing tx_obj_num_coalesce_irq
can: isotp: split tx timer into transmission and timeout
can: isotp: handle wait_event_interruptible() return values
can: raw: fix CAN FD frame transmissions over CAN XL devices
can: j1939: fix errant WARN_ON_ONCE in j1939_session_deactivate
hv_netvsc: Fix missed pagebuf entries in netvsc_dma_map/unmap()
...
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benchmarking
The test tool can check that the zerocopy number of completions value is
valid taking into consideration the number of datagram send calls. This can
catch the system into a state where the datagrams are still in the system
(for example in a qdisk, waiting for the network interface to return a
completion notification, etc).
This change adds a retry logic of computing the number of completions up to
a configurable (via CLI) timeout (default: 2 seconds).
Fixes: 79ebc3c26010 ("net/udpgso_bench_tx: options to exercise TX CMSG")
Signed-off-by: Andrei Gherzan <andrei.gherzan@canonical.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20230201001612.515730-4-andrei.gherzan@canonical.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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"udpgro_bench.sh" invokes udpgso_bench_rx/udpgso_bench_tx programs
subsequently and while doing so, there is a chance that the rx one is not
ready to accept socket connections. This racing bug could fail the test
with at least one of the following:
./udpgso_bench_tx: connect: Connection refused
./udpgso_bench_tx: sendmsg: Connection refused
./udpgso_bench_tx: write: Connection refused
This change addresses this by making udpgro_bench.sh wait for the rx
program to be ready before firing off the tx one - up to a 10s timeout.
Fixes: 3a687bef148d ("selftests: udp gso benchmark")
Signed-off-by: Andrei Gherzan <andrei.gherzan@canonical.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Willem de Bruijn <willemb@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20230201001612.515730-3-andrei.gherzan@canonical.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Leaving unrecognized arguments buried in the output, can easily hide a
CLI/script typo. Avoid this by exiting when wrong arguments are provided to
the udpgso_bench test programs.
Fixes: 3a687bef148d ("selftests: udp gso benchmark")
Signed-off-by: Andrei Gherzan <andrei.gherzan@canonical.com>
Cc: Willem de Bruijn <willemb@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20230201001612.515730-2-andrei.gherzan@canonical.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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This change fixes the following compiler warning:
/usr/include/x86_64-linux-gnu/bits/error.h:40:5: warning: ‘gso_size’ may
be used uninitialized [-Wmaybe-uninitialized]
40 | __error_noreturn (__status, __errnum, __format,
__va_arg_pack ());
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^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
udpgso_bench_rx.c: In function ‘main’:
udpgso_bench_rx.c:253:23: note: ‘gso_size’ was declared here
253 | int ret, len, gso_size, budget = 256;
Fixes: 3327a9c46352 ("selftests: add functionals test for UDP GRO")
Signed-off-by: Andrei Gherzan <andrei.gherzan@canonical.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20230201001612.515730-1-andrei.gherzan@canonical.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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It was found that the check to see if a partition could use up all
the cpus from the parent cpuset in update_parent_subparts_cpumask()
was incorrect. As a result, it is possible to leave parent with no
effective cpu left even if there are tasks in the parent cpuset. This
can lead to system panic as reported in [1].
Fix this probem by updating the check to fail the enabling the partition
if parent's effective_cpus is a subset of the child's cpus_allowed.
Also record the error code when an error happens in update_prstate()
and add a test case where parent partition and child have the same cpu
list and parent has task. Enabling partition in the child will fail in
this case.
[1] https://www.spinics.net/lists/cgroups/msg36254.html
Fixes: f0af1bfc27b5 ("cgroup/cpuset: Relax constraints to partition & cpus changes")
Cc: stable@vger.kernel.org # v6.1
Reported-by: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Extend the read-only memslot tests in page_fault_test to test
read-only PT (Page table) memslots. Note that this was not allowed
before commit 406504c7b040 ("KVM: arm64: Fix S1PTW handling on RO
memslots") as all S1PTW faults were treated as writes which resulted
in an (unrecoverable) exception inside the guest.
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230127214353.245671-5-ricarkol@google.com
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The dirty log checks are mistakenly testing the first page in the page
table (PT) memory region instead of the page holding the test data
page PTE. This wasn't an issue before commit 406504c7b040 ("KVM:
arm64: Fix S1PTW handling on RO memslots") as all PT pages (including
the first page) were treated as writes.
Fix the page_fault_test dirty logging tests by checking for the right
page: the one for the PTE of the data test page.
Fixes: a4edf25b3e25 ("KVM: selftests: aarch64: Add dirty logging tests into page_fault_test")
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230127214353.245671-4-ricarkol@google.com
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Only Stage1 Page table walks (S1PTW) trying to write into a PTE should
result in the PTE page being dirty in the log. However, the dirty log
tests in page_fault_test default to treat all S1PTW accesses as writes.
Fix the relevant tests by asserting dirty pages only for S1PTW writes,
which in these tests only applies to when Hardware management of the Access
Flag is enabled.
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230127214353.245671-3-ricarkol@google.com
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Only Stage1 Page table walks (S1PTW) writing a PTE on an unmapped page
should result in a userfaultfd write. However, the userfaultfd tests in
page_fault_test wrongly assert that any S1PTW is a PTE write.
Fix this by relaxing the read vs. write checks in all userfaultfd
handlers. Note that this is also an attempt to focus less on KVM (and
userfaultfd) behavior, and more on architectural behavior. Also note
that after commit 406504c7b040 ("KVM: arm64: Fix S1PTW handling on RO
memslots"), the userfaultfd fault (S1PTW with AF on an unmaped PTE
page) is actually a read: the translation fault that comes before the
permission fault.
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230127214353.245671-2-ricarkol@google.com
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"tcpdump" is used to capture traffic in these tests while using a random,
temporary and not suffixed file for it. This can interfere with apparmor
configuration where the tool is only allowed to read from files with
'known' extensions.
The MINE type application/vnd.tcpdump.pcap was registered with IANA for
pcap files and .pcap is the extension that is both most common but also
aligned with standard apparmor configurations. See TCPDUMP(8) for more
details.
This improves compatibility with standard apparmor configurations by
using ".pcap" as the file extension for the tests' temporary files.
Signed-off-by: Andrei Gherzan <andrei.gherzan@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
bpf 2023-01-27
We've added 10 non-merge commits during the last 9 day(s) which contain
a total of 10 files changed, 170 insertions(+), 59 deletions(-).
The main changes are:
1) Fix preservation of register's parent/live fields when copying
range-info, from Eduard Zingerman.
2) Fix an off-by-one bug in bpf_mem_cache_idx() to select the right
cache, from Hou Tao.
3) Fix stack overflow from infinite recursion in sock_map_close(),
from Jakub Sitnicki.
4) Fix missing btf_put() in register_btf_id_dtor_kfuncs()'s error path,
from Jiri Olsa.
5) Fix a splat from bpf_setsockopt() via lsm_cgroup/socket_sock_rcv_skb,
from Kui-Feng Lee.
6) Fix bpf_send_signal[_thread]() helpers to hold a reference on the task,
from Yonghong Song.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
bpf: Fix the kernel crash caused by bpf_setsockopt().
selftests/bpf: Cover listener cloning with progs attached to sockmap
selftests/bpf: Pass BPF skeleton to sockmap_listen ops tests
bpf, sockmap: Check for any of tcp_bpf_prots when cloning a listener
bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself
bpf: Add missing btf_put to register_btf_id_dtor_kfuncs
selftests/bpf: Verify copy_register_state() preserves parent/live fields
bpf: Fix to preserve reg parent/live fields when copying range info
bpf: Fix a possible task gone issue with bpf_send_signal[_thread]() helpers
bpf: Fix off-by-one error in bpf_mem_cache_idx()
====================
Link: https://lore.kernel.org/r/20230127215820.4993-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest fixes from Shuah Khan:
"A single fix to a amd-pstate test Makefile bug that deletes source
files during make clean run"
* tag 'linux-kselftest-fixes-6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests: amd-pstate: Don't delete source files via Makefile
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Revert the portion of a recent Makefile change that incorrectly
deletes source files when doing "make clean".
Fixes: ba2d788aa873 ("selftests: amd-pstate: Trigger tbench benchmark and test cpus")
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Today we test if a child socket is cloned properly from a listening socket
inside a sockmap only when there are no BPF programs attached to the map.
A bug has been reported [1] for the case when sockmap has a verdict program
attached. So cover this case as well to prevent regressions.
[1]: https://lore.kernel.org/r/00000000000073b14905ef2e7401@google.com
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20230113-sockmap-fix-v2-4-1e0ee7ac2f90@cloudflare.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Following patch extends the sockmap ops tests to cover the scenario when a
sockmap with attached programs holds listening sockets.
Pass the BPF skeleton to sockmap ops test so that the can access and attach
the BPF programs.
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20230113-sockmap-fix-v2-3-1e0ee7ac2f90@cloudflare.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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reclaim_period_ms used to be positive only but the commit 0001725d0f9b
("KVM: selftests: Add atoi_positive() and atoi_non_negative() for input
validation") incorrectly changed it to non-negative validation.
Change validation to allow only positive input.
Fixes: 0001725d0f9b ("KVM: selftests: Add atoi_positive() and atoi_non_negative() for input validation")
Signed-off-by: Vipin Sharma <vipinsh@google.com>
Reported-by: Ben Gardon <bgardon@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230111183408.104491-1-vipinsh@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Placing a declaration of evt_reset is pedantically invalid
according to the C standard. While GCC does not really care
and only warns with -Wpedantic, clang ignores the declaration
altogether with an error:
x86_64/xen_shinfo_test.c:965:2: error: expected expression
struct kvm_xen_hvm_attr evt_reset = {
^
x86_64/xen_shinfo_test.c:969:38: error: use of undeclared identifier evt_reset
vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &evt_reset);
^
Reported-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Reported-by: Sean Christopherson <seanjc@google.com>
Fixes: a79b53aaaab5 ("KVM: x86: fix deadlock for KVM_XEN_EVTCHN_RESET", 2022-12-28)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest fix from Shuah Khan:
"Fix an error seen during unconfigured LLVM builds"
* tag 'linux-kselftest-fixes-6.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kselftest: Fix error message for unconfigured LLVM builds
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from wireless, bluetooth, bpf and netfilter.
Current release - regressions:
- Revert "net: team: use IFF_NO_ADDRCONF flag to prevent ipv6
addrconf", fix nsna_ping mode of team
- wifi: mt76: fix bugs in Rx queue handling and DMA mapping
- eth: mlx5:
- add missing mutex_unlock in error reporter
- protect global IPsec ASO with a lock
Current release - new code bugs:
- rxrpc: fix wrong error return in rxrpc_connect_call()
Previous releases - regressions:
- bluetooth: hci_sync: fix use of HCI_OP_LE_READ_BUFFER_SIZE_V2
- wifi:
- mac80211: fix crashes on Rx due to incorrect initialization of
rx->link and rx->link_sta
- mac80211: fix bugs in iTXQ conversion - Tx stalls, incorrect
aggregation handling, crashes
- brcmfmac: fix regression for Broadcom PCIe wifi devices
- rndis_wlan: prevent buffer overflow in rndis_query_oid
- netfilter: conntrack: handle tcp challenge acks during connection
reuse
- sched: avoid grafting on htb_destroy_class_offload when destroying
- virtio-net: correctly enable callback during start_xmit, fix stalls
- tcp: avoid the lookup process failing to get sk in ehash table
- ipa: disable ipa interrupt during suspend
- eth: stmmac: enable all safety features by default
Previous releases - always broken:
- bpf:
- fix pointer-leak due to insufficient speculative store bypass
mitigation (Spectre v4)
- skip task with pid=1 in send_signal_common() to avoid a splat
- fix BPF program ID information in BPF_AUDIT_UNLOAD as well as
PERF_BPF_EVENT_PROG_UNLOAD events
- fix potential deadlock in htab_lock_bucket from same bucket
index but different map_locked index
- bluetooth:
- fix a buffer overflow in mgmt_mesh_add()
- hci_qca: fix driver shutdown on closed serdev
- ISO: fix possible circular locking dependency
- CIS: hci_event: fix invalid wait context
- wifi: brcmfmac: fixes for survey dump handling
- mptcp: explicitly specify sock family at subflow creation time
- netfilter: nft_payload: incorrect arithmetics when fetching VLAN
header bits
- tcp: fix rate_app_limited to default to 1
- l2tp: close all race conditions in l2tp_tunnel_register()
- eth: mlx5: fixes for QoS config and eswitch configuration
- eth: enetc: avoid deadlock in enetc_tx_onestep_tstamp()
- eth: stmmac: fix invalid call to mdiobus_get_phy()
Misc:
- ethtool: add netlink attr in rss get reply only if the value is not
empty"
* tag 'net-6.2-rc5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (88 commits)
Revert "Merge branch 'octeontx2-af-CPT'"
tcp: fix rate_app_limited to default to 1
bnxt: Do not read past the end of test names
net: stmmac: enable all safety features by default
octeontx2-af: add mbox to return CPT_AF_FLT_INT info
octeontx2-af: update cpt lf alloc mailbox
octeontx2-af: restore rxc conf after teardown sequence
octeontx2-af: optimize cpt pf identification
octeontx2-af: modify FLR sequence for CPT
octeontx2-af: add mbox for CPT LF reset
octeontx2-af: recover CPT engine when it gets fault
net: dsa: microchip: ksz9477: port map correction in ALU table entry register
selftests/net: toeplitz: fix race on tpacket_v3 block close
net/ulp: use consistent error code when blocking ULP
octeontx2-pf: Fix the use of GFP_KERNEL in atomic context on rt
tcp: avoid the lookup process failing to get sk in ehash table
Revert "net: team: use IFF_NO_ADDRCONF flag to prevent ipv6 addrconf"
MAINTAINERS: add networking entries for Willem
net: sched: gred: prevent races when adding offloads to stats
l2tp: prevent lockdep issue in l2tp_tunnel_register()
...
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When use tools/testing/selftests/kselftest_install.sh to make the
kselftest-list.txt under tools/testing/selftests/kselftest_install.
Then use tools/testing/selftests/kselftest_install/run_kselftest.sh to run
all the kselftests in kselftest-list.txt, it will be blocked by case
"filesystems/fat: run_fat_tests.sh" with "Warning: file run_fat_tests.sh
is not executable", so grant executable permission to run_fat_tests.sh to
fix this issue.
Link: https://lkml.kernel.org/r/dfdbba6df8a1ab34bb1e81cd8bd7ca3f9ed5c369.1673424747.git.pengfei.xu@intel.com
Fixes: dd7c9be330d8 ("selftests/filesystems: add a vfat RENAME_EXCHANGE test")
Signed-off-by: Pengfei Xu <pengfei.xu@intel.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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A testcase to check that verifier.c:copy_register_state() preserves
register parentage chain and livness information.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20230106142214.1040390-3-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Avoid race between process wakeup and tpacket_v3 block timeout.
The test waits for cfg_timeout_msec for packets to arrive. Packets
arrive in tpacket_v3 rings, which pass packets ("frames") to the
process in batches ("blocks"). The sk waits for req3.tp_retire_blk_tov
msec to release a block.
Set the block timeout lower than the process waiting time, else
the process may find that no block has been released by the time it
scans the socket list. Convert to a ring of more than one, smaller,
blocks with shorter timeouts. Blocks must be page aligned, so >= 64KB.
Fixes: 5ebfb4cc3048 ("selftests/net: toeplitz test")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20230118151847.4124260-1-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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__USE_GNU should be an internal macro only used inside glibc. Either
memfd_create() or fallocate() requires _GNU_SOURCE per man page, where
__USE_GNU will further be defined by glibc headers include/features.h:
#ifdef _GNU_SOURCE
# define __USE_GNU 1
#endif
This fixes:
>> hugetlb-madvise.c:20: warning: "__USE_GNU" redefined
20 | #define __USE_GNU
|
In file included from /usr/include/x86_64-linux-gnu/bits/libc-header-start.h:33,
from /usr/include/stdlib.h:26,
from hugetlb-madvise.c:16:
/usr/include/features.h:407: note: this is the location of the previous definition
407 | # define __USE_GNU 1
|
Link: https://lkml.kernel.org/r/Y8V9z+z6Tk7NetI3@x1n
Signed-off-by: Peter Xu <peterx@redhat.com>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Merge branch 'master' into mm-hotfixes-stable
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc hotfixes from Andrew Morton:
"21 hotfixes. Thirteen of these address pre-6.1 issues and hence have
the cc:stable tag"
* tag 'mm-hotfixes-stable-2023-01-16-15-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (21 commits)
init/Kconfig: fix typo (usafe -> unsafe)
nommu: fix split_vma() map_count error
nommu: fix do_munmap() error path
nommu: fix memory leak in do_mmap() error path
MAINTAINERS: update Robert Foss' email address
proc: fix PIE proc-empty-vm, proc-pid-vm tests
mm: update mmap_sem comments to refer to mmap_lock
include/linux/mm: fix release_pages_arg kernel doc comment
lib/win_minmax: use /* notation for regular comments
kasan: mark kasan_kunit_executing as static
nilfs2: fix general protection fault in nilfs_btree_insert()
Docs/admin-guide/mm/zswap: remove zsmalloc's lack of writeback warning
mm/hugetlb: pre-allocate pgtable pages for uffd wr-protects
hugetlb: unshare some PMDs when splitting VMAs
mm: fix vma->anon_name memory leak for anonymous shmem VMAs
mm/shmem: restore SHMEM_HUGE_DENY precedence over MADV_COLLAPSE
mm/MADV_COLLAPSE: don't expand collapse when vm_end is past requested end
mm/userfaultfd: enable writenotify while userfaultfd-wp is enabled for a VMA
mm/khugepaged: fix collapse_pte_mapped_thp() to allow anon_vma
mm/hugetlb: fix uffd-wp handling for migration entries in hugetlb_change_protection()
...
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Pable Neira Ayuso says:
====================
The following patchset contains Netfilter fixes for net:
1) Increase timeout to 120 seconds for netfilter selftests to fix
nftables transaction tests, from Florian Westphal.
2) Fix overflow in bitmap_ip_create() due to integer arithmetics
in a 64-bit bitmask, from Gavrilov Ilia.
3) Fix incorrect arithmetics in nft_payload with double-tagged
vlan matching.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock fix from Mike Rapoport:
"memblock: always release pages to the buddy allocator in
memblock_free_late()
If CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled, memblock_free_pages()
only releases pages to the buddy allocator if they are not in the
deferred range. This is correct for free pages (as defined by
for_each_free_mem_pfn_range_in_zone()) because free pages in the
deferred range will be initialized and released as part of the
deferred init process.
memblock_free_pages() is called by memblock_free_late(), which is used
to free reserved ranges after memblock_free_all() has run. All pages
in reserved ranges have been initialized at that point, and
accordingly, those pages are not touched by the deferred init process.
This means that currently, if the pages that memblock_free_late()
intends to release are in the deferred range, they will never be
released to the buddy allocator. They will forever be reserved.
In addition, memblock_free_pages() calls kmsan_memblock_free_pages(),
which is also correct for free pages but is not correct for reserved
pages. KMSAN metadata for reserved pages is initialized by
kmsan_init_shadow(), which runs shortly before memblock_free_all().
For both of these reasons, memblock_free_pages() should only be called
for free pages, and memblock_free_late() should call
__free_pages_core() directly instead.
One case where this issue can occur in the wild is EFI boot on x86_64.
The x86 EFI code reserves all EFI boot services memory ranges via
memblock_reserve() and frees them later via memblock_free_late()
(efi_reserve_boot_services() and efi_free_boot_services(),
respectively).
If any of those ranges happens to fall within the deferred init range,
the pages will not be released and that memory will be unavailable.
For example, on an Amazon EC2 t3.micro VM (1 GB) booting via EFI:
v6.2-rc2:
Node 0, zone DMA
spanned 4095
present 3999
managed 3840
Node 0, zone DMA32
spanned 246652
present 245868
managed 178867
v6.2-rc2 + patch:
Node 0, zone DMA
spanned 4095
present 3999
managed 3840
Node 0, zone DMA32
spanned 246652
present 245868
managed 222816 # +43,949 pages"
* tag 'fixes-2023-01-14' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
mm: Always release pages to the buddy allocator in memblock_free_late().
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MPTCP protocol supports having subflows in both IPv4 and IPv6. In Linux,
it is possible to have that if the MPTCP socket has been created with
AF_INET6 family without the IPV6_V6ONLY option.
Here, a new IPv4 subflow is being added to the initial IPv6 connection,
then being removed using Netlink commands.
Cc: stable@vger.kernel.org # v5.19+
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Paolo Abeni:
"Including fixes from rxrpc.
The rxrpc changes are noticeable large: to address a recent regression
has been necessary completing the threaded refactor.
Current release - regressions:
- rxrpc:
- only disconnect calls in the I/O thread
- move client call connection to the I/O thread
- fix incoming call setup race
- eth: mlx5:
- restore pkt rate policing support
- fix memory leak on updating vport counters
Previous releases - regressions:
- gro: take care of DODGY packets
- ipv6: deduct extension header length in rawv6_push_pending_frames
- tipc: fix unexpected link reset due to discovery messages
Previous releases - always broken:
- sched: disallow noqueue for qdisc classes
- eth: ice: fix potential memory leak in ice_gnss_tty_write()
- eth: ixgbe: fix pci device refcount leak
- eth: mlx5:
- fix command stats access after free
- fix macsec possible null dereference when updating MAC security
entity (SecY)"
* tag 'net-6.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (64 commits)
r8152: add vendor/device ID pair for Microsoft Devkit
net: stmmac: add aux timestamps fifo clearance wait
bnxt: make sure we return pages to the pool
net: hns3: fix wrong use of rss size during VF rss config
ipv6: raw: Deduct extension header length in rawv6_push_pending_frames
net: lan966x: check for ptp to be enabled in lan966x_ptp_deinit()
net: sched: disallow noqueue for qdisc classes
iavf/iavf_main: actually log ->src mask when talking about it
igc: Fix PPS delta between two synchronized end-points
ixgbe: fix pci device refcount leak
octeontx2-pf: Fix resource leakage in VF driver unbind
selftests/net: l2_tos_ttl_inherit.sh: Ensure environment cleanup on failure.
selftests/net: l2_tos_ttl_inherit.sh: Run tests in their own netns.
selftests/net: l2_tos_ttl_inherit.sh: Set IPv6 addresses with "nodad".
net/mlx5e: Fix macsec possible null dereference when updating MAC security entity (SecY)
net/mlx5e: Fix macsec ssci attribute handling in offload path
net/mlx5: E-switch, Coverity: overlapping copy
net/mlx5e: Don't support encap rules with gbp option
net/mlx5: Fix ptp max frequency adjustment range
net/mlx5e: Fix memory leak on updating vport counters
...
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We are missing a ) when we attempt to complain about not having enough
configuration for clang, resulting in the rather inscrutable error:
../lib.mk:23: *** unterminated call to function 'error': missing ')'. Stop.
Add the required ) so we print the message we were trying to print.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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vsyscall detection code uses direct call to the beginning of
the vsyscall page:
asm ("call %P0" :: "i" (0xffffffffff600000))
It generates "call rel32" instruction but it is not relocated if binary
is PIE, so binary segfaults into random userspace address and vsyscall
page status is detected incorrectly.
Do more direct:
asm ("call *%rax")
which doesn't do need any relocaltions.
Mark g_vsyscall as volatile for a good measure, I didn't find instruction
setting it to 0. Now the code is obviously correct:
xor eax, eax
mov rdi, rbp
mov rsi, rbp
mov DWORD PTR [rip+0x2d15], eax # g_vsyscall = 0
mov rax, 0xffffffffff600000
call rax
mov DWORD PTR [rip+0x2d02], 1 # g_vsyscall = 1
mov eax, DWORD PTR ds:0xffffffffff600000
mov DWORD PTR [rip+0x2cf1], 2 # g_vsyscall = 2
mov edi, [rip+0x2ceb] # exit(g_vsyscall)
call exit
Note: fixed proc-empty-vm test oopses 5.19.0-28-generic kernel
but this is separate story.
Link: https://lkml.kernel.org/r/Y7h2xvzKLg36DSq8@p183
Fixes: 5bc73bb3451b9 ("proc: test how it holds up with mapping'less process")
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reported-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Tested-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The kselftest framework uses a default timeout of 45 seconds for
all test scripts.
Increase the timeout to two minutes for the netfilter tests, this
should hopefully be enough,
Make sure that, should the script be canceled, the net namespace and
the spawned ping instances are removed.
Fixes: 25d8bcedbf43 ("selftests: add script to stress-test nft packet path vs. control plane")
Reported-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Signed-off-by: Florian Westphal <fw@strlen.de>
Tested-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use 'set -e' and an exit handler to stop the script if a command fails
and ensure the test environment is cleaned up in any case. Also, handle
the case where the script is interrupted by SIGINT.
The only command that's expected to fail is 'wait $ping_pid', since
it's killed by the script. Handle this case with '|| true' to make it
play well with 'set -e'.
Finally, return the Kselftest SKIP code (4) when the script breaks
because of an environment problem or a command line failure. The 0 and
1 return codes should now reliably indicate that all tests have been
run (0: all tests run and passed, 1: all tests run but at least one
failed, 4: test script didn't run completely).
Fixes: b690842d12fd ("selftests/net: test l2 tunnel TOS/TTL inheriting")
Reported-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Tested-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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This selftest currently runs half in the current namespace and half in
a netns of its own. Therefore, the test can fail if the current
namespace is already configured with incompatible parameters (for
example if it already has a veth0 interface).
Adapt the script to put both ends of the veth pair in their own netns.
Now veth0 is created in NS0 instead of the current namespace, while
veth1 is set up in NS1 (instead of the 'testing' netns).
The user visible netns names are randomised to minimise the risk of
conflicts with already existing namespaces. The cleanup() function
doesn't need to remove the virtual interface anymore: deleting NS0 and
NS1 automatically removes the virtual interfaces they contained.
We can remove $ns, which was only used to run ip commands in the
'testing' netns (let's use the builtin "-netns" option instead).
However, we still need a similar functionality as ping and tcpdump
now need to run in NS0. So we now have $RUN_NS0 for that.
Fixes: b690842d12fd ("selftests/net: test l2 tunnel TOS/TTL inheriting")
Reported-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Tested-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The ping command can run before DAD completes. In that case, ping may
fail and break the selftest.
We don't need DAD here since we're working on isolated device pairs.
Fixes: b690842d12fd ("selftests/net: test l2 tunnel TOS/TTL inheriting")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Adjust size parameter in connect() to match the type of the parameter, to
fix "No such file or directory" error in selftests/net/af_unix/
test_oob_unix.c:127.
The existing code happens to work provided that the autogenerated pathname
is shorter than sizeof (struct sockaddr), which is why it hasn't been
noticed earlier.
Visible from the trace excerpt:
bind(3, {sa_family=AF_UNIX, sun_path="unix_oob_453059"}, 110) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fa6a6577a10) = 453060
[pid <child>] connect(6, {sa_family=AF_UNIX, sun_path="unix_oob_45305"}, 16) = -1 ENOENT (No such file or directory)
BUG: The filename is trimmed to sizeof (struct sockaddr).
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Cc: Florian Westphal <fw@strlen.de>
Reviewed-by: Florian Westphal <fw@strlen.de>
Fixes: 314001f0bf92 ("af_unix: Add OOB support")
Signed-off-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
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If CONFIG_DEFERRED_STRUCT_PAGE_INIT is enabled, memblock_free_pages()
only releases pages to the buddy allocator if they are not in the
deferred range. This is correct for free pages (as defined by
for_each_free_mem_pfn_range_in_zone()) because free pages in the
deferred range will be initialized and released as part of the deferred
init process. memblock_free_pages() is called by memblock_free_late(),
which is used to free reserved ranges after memblock_free_all() has
run. All pages in reserved ranges have been initialized at that point,
and accordingly, those pages are not touched by the deferred init
process. This means that currently, if the pages that
memblock_free_late() intends to release are in the deferred range, they
will never be released to the buddy allocator. They will forever be
reserved.
In addition, memblock_free_pages() calls kmsan_memblock_free_pages(),
which is also correct for free pages but is not correct for reserved
pages. KMSAN metadata for reserved pages is initialized by
kmsan_init_shadow(), which runs shortly before memblock_free_all().
For both of these reasons, memblock_free_pages() should only be called
for free pages, and memblock_free_late() should call __free_pages_core()
directly instead.
One case where this issue can occur in the wild is EFI boot on
x86_64. The x86 EFI code reserves all EFI boot services memory ranges
via memblock_reserve() and frees them later via memblock_free_late()
(efi_reserve_boot_services() and efi_free_boot_services(),
respectively). If any of those ranges happens to fall within the
deferred init range, the pages will not be released and that memory will
be unavailable.
For example, on an Amazon EC2 t3.micro VM (1 GB) booting via EFI:
v6.2-rc2:
# grep -E 'Node|spanned|present|managed' /proc/zoneinfo
Node 0, zone DMA
spanned 4095
present 3999
managed 3840
Node 0, zone DMA32
spanned 246652
present 245868
managed 178867
v6.2-rc2 + patch:
# grep -E 'Node|spanned|present|managed' /proc/zoneinfo
Node 0, zone DMA
spanned 4095
present 3999
managed 3840
Node 0, zone DMA32
spanned 246652
present 245868
managed 222816 # +43,949 pages
Fixes: 3a80a7fa7989 ("mm: meminit: initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set")
Signed-off-by: Aaron Thompson <dev@aaront.org>
Link: https://lore.kernel.org/r/01010185892de53e-e379acfb-7044-4b24-b30a-e2657c1ba989-000000@us-west-2.amazonses.com
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock fixes from Mike Rapoport:
"Small fixes in kernel-doc and tests:
- Fix kernel-doc for memblock_phys_free() to use correct names for
the counterpart allocation methods
- Fix compilation error in memblock tests"
* tag 'fixes-2023-01-08' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
memblock: Fix doc for memblock_phys_free
memblock tests: Fix compilation error.
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