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Yoshihiro Shimoda says:
====================
net: ravb: Fix potential issues
Fix potentiall issues on the ravb driver.
Changes from v2:
https://lore.kernel.org/all/20230123131331.1425648-1-yoshihiro.shimoda.uh@renesas.com/
- Add Reviewed-by in the patch [2/2].
- Add a commit description in the patch [2/2].
Changes from v1:
https://lore.kernel.org/all/20230119043920.875280-1-yoshihiro.shimoda.uh@renesas.com/
- Fix typo in the patch [1/2].
- Add Reviewed-by in the patch [1/2].
- Fix "Fixed" tag in the patch [2/2].
- Fix a comment indentation of the code in the patch [2/2].
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since this driver enables the interrupt by RIC2_QFE1, this driver
should clear the interrupt flag if it happens. Otherwise, the interrupt
causes to hang the system.
Note that this also fix a minor coding style (a comment indentation)
around the fixed code.
Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
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After system entered Suspend to RAM, registers setting of this
hardware is reset because the SoC will be turned off. On R-Car Gen3
(info->ccc_gac), ravb_ptp_init() is called in ravb_probe() only. So,
after system resumed, it lacks of the initial settings for ptp. So,
add ravb_ptp_{init,stop}() into ravb_{resume,suspend}().
Fixes: f5d7837f96e5 ("ravb: ptp: Add CONFIG mode support")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the following call path:
ethnl_default_dumpit
-> ethnl_default_dump_one
-> ctx->ops->prepare_data
-> pause_prepare_data
struct genl_info *info will be passed as NULL, and pause_prepare_data()
dereferences it while getting the extended ack pointer.
To avoid that, just set the extack to NULL if "info" is NULL, since the
netlink extack handling messages know how to deal with that.
The pattern "info ? info->extack : NULL" is present in quite a few other
"prepare_data" implementations, so it's clear that it's a more general
problem to be dealt with at a higher level, but the code should have at
least adhered to the current conventions to avoid the NULL dereference.
Fixes: 04692c9020b7 ("net: ethtool: netlink: retrieve stats from multiple sources (eMAC, pMAC)")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reported-by: syzbot+9d44aae2720fc40b8474@syzkaller.appspotmail.com
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the following call path:
ethnl_default_dumpit
-> ethnl_default_dump_one
-> ctx->ops->prepare_data
-> stats_prepare_data
struct genl_info *info will be passed as NULL, and stats_prepare_data()
dereferences it while getting the extended ack pointer.
To avoid that, just set the extack to NULL if "info" is NULL, since the
netlink extack handling messages know how to deal with that.
The pattern "info ? info->extack : NULL" is present in quite a few other
"prepare_data" implementations, so it's clear that it's a more general
problem to be dealt with at a higher level, but the code should have at
least adhered to the current conventions to avoid the NULL dereference.
Fixes: 04692c9020b7 ("net: ethtool: netlink: retrieve stats from multiple sources (eMAC, pMAC)")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When listen() and accept() are called on an x25 socket
that connect() succeeds, accept() succeeds immediately.
This is because x25_connect() queues the skb to
sk->sk_receive_queue, and x25_accept() dequeues it.
This creates a child socket with the sk of the parent
x25 socket, which can cause confusion.
Fix x25_listen() to return -EINVAL if the socket has
already been successfully connect()ed to avoid this issue.
Signed-off-by: Hyunwoo Kim <v4bel@theori.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jan Karcher says:
====================
drivers/s390/net/ism: Add generalized interface
Previously, there was no clean separation between SMC-D code and the ISM
device driver.This patch series addresses the situation to make ISM available
for uses outside of SMC-D.
In detail: SMC-D offers an interface via struct smcd_ops, which only the
ISM module implements so far. However, there is no real separation between
the smcd and ism modules, which starts right with the ISM device
initialization, which calls directly into the SMC-D code.
This patch series introduces a new API in the ISM module, which allows
registration of arbitrary clients via include/linux/ism.h: struct ism_client.
Furthermore, it introduces a "pure" struct ism_dev (i.e. getting rid of
dependencies on SMC-D in the device structure), and adds a number of API
calls for data transfers via ISM (see ism_register_dmb() & friends).
Still, the ISM module implements the SMC-D API, and therefore has a number
of internal helper functions for that matter.
Note that the ISM API is consciously kept thin for now (as compared to the
SMC-D API calls), as a number of API calls are only used with SMC-D and
hardly have any meaningful usage beyond SMC-D, e.g. the VLAN-related calls.
v1 -> v2:
Removed s390x dependency which broke config for other archs.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The struct device for ISM devices was part of struct smcd_dev. Move to
struct ism_dev, provide a new API call in struct smcd_ops, and convert
existing SMCD code accordingly.
Furthermore, remove struct smcd_dev from struct ism_dev.
This is the final part of a bigger overhaul of the interfaces between SMC
and ISM.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ism module had SMC-D-specific code sprinkled across the entire module.
We are now consolidating the SMC-D-specific parts into the latter parts
of the module, so it becomes more clear what code is intended for use with
ISM, and which parts are glue code for usage in the context of SMC-D.
This is the fourth part of a bigger overhaul of the interfaces between SMC
and ISM.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We separate the code implementing the struct smcd_ops API in the ISM
device driver from the functions that may be used by other exploiters of
ISM devices.
Note: We start out small, and don't offer the whole breadth of the ISM
device for public use, as many functions are specific to or likely only
ever used in the context of SMC-D.
This is the third part of a bigger overhaul of the interfaces between SMC
and ISM.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Register the smc module with the new ism device driver API.
This is the second part of a bigger overhaul of the interfaces between SMC
and ISM.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add a new API that allows other drivers to concurrently access ISM devices.
To do so, we introduce a new API that allows other modules to register for
ISM device usage. Furthermore, we move the GID to struct ism, where it
belongs conceptually, and rename and relocate struct smcd_event to struct
ism_event.
This is the first part of a bigger overhaul of the interfaces between SMC
and ISM.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Conceptually, a DMB is a structure that belongs to ISM devices. However,
SMC currently 'owns' this structure. So future exploiters of ISM devices
would be forced to include SMC headers to work - which is just weird.
Therefore, we switch ISM to struct ism_dmb, introduce a new public header
with the definition (will be populated with further API calls later on),
and, add a thin wrapper to please SMC. Since structs smcd_dmb and ism_dmb
are identical, we can simply convert between the two for now.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Removing an ISM device prior to terminating its associated connections
doesn't end well.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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virtio queue index can be maximum of 65535. 16 bytes are enough to store
the vq name with the existing string prefix.
With this change, send queue struct saves 24 bytes and receive
queue saves whole cache line worth 64 bytes per structure
due to saving in alignment bytes.
Pahole results before:
pahole -s drivers/net/virtio_net.o | \
grep -e "send_queue" -e "receive_queue"
send_queue 1112 0
receive_queue 1280 1
Pahole results after:
pahole -s drivers/net/virtio_net.o | \
grep -e "send_queue" -e "receive_queue"
send_queue 1088 0
receive_queue 1216 1
Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Build bot detects that err may be returned uninitialized in
devlink_fmsg_prepare_skb(). This is not really true because
all fmsgs users should create at least one outer nest, and
therefore fmsg can't be completely empty.
That said the assumption is not trivial to confirm, so let's
follow the bots advice, anyway.
This code does not seem to have changed since its inception in
commit 1db64e8733f6 ("devlink: Add devlink formatted message (fmsg) API")
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230124035231.787381-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When validating BTF types for KF_TRUSTED_ARGS kfuncs, the verifier
currently enforces that the top-level type must match when calling
the kfunc. In other words, the verifier does not allow the BPF program
to pass a bitwise equivalent struct, despite it being allowed according
to the C standard.
For example, if you have the following type:
struct nf_conn___init {
struct nf_conn ct;
};
The C standard stipulates that it would be safe to pass a struct
nf_conn___init to a kfunc expecting a struct nf_conn. The verifier
currently disallows this, however, as semantically kfuncs may want to
enforce that structs that have equivalent types according to the C
standard, but have different BTF IDs, are not able to be passed to
kfuncs expecting one or the other. For example, struct nf_conn___init
may not be queried / looked up, as it is allocated but may not yet be
fully initialized.
On the other hand, being able to pass types that are equivalent
according to the C standard will be useful for other types of kfunc /
kptrs enabled by BPF. For example, in a follow-on patch, a series of
kfuncs will be added which allow programs to do bitwise queries on
cpumasks that are either allocated by the program (in which case they'll
be a 'struct bpf_cpumask' type that wraps a cpumask_t as its first
element), or a cpumask that was allocated by the main kernel (in which
case it will just be a straight cpumask_t, as in task->cpus_ptr).
Having the two types of cpumasks allows us to distinguish between the
two for when a cpumask is read-only vs. mutatable. A struct bpf_cpumask
can be mutated by e.g. bpf_cpumask_clear(), whereas a regular cpumask_t
cannot be. On the other hand, a struct bpf_cpumask can of course be
queried in the exact same manner as a cpumask_t, with e.g.
bpf_cpumask_test_cpu().
If we were to enforce that top level types match, then a user that's
passing a struct bpf_cpumask to a read-only cpumask_t argument would
have to cast with something like bpf_cast_to_kern_ctx() (which itself
would need to be updated to expect the alias, and currently it only
accommodates a single alias per prog type). Additionally, not specifying
KF_TRUSTED_ARGS is not an option, as some kfuncs take one argument as a
struct bpf_cpumask *, and another as a struct cpumask *
(i.e. cpumask_t).
In order to enable this, this patch relaxes the constraint that a
KF_TRUSTED_ARGS kfunc must have strict type matching, and instead only
enforces strict type matching if a type is observed to be a "no-cast
alias" (i.e., that the type names are equivalent, but one is suffixed
with ___init).
Additionally, in order to try and be conservative and match existing
behavior / expectations, this patch also enforces strict type checking
for acquire kfuncs. We were already enforcing it for release kfuncs, so
this should also improve the consistency of the semantics for kfuncs.
Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20230120192523.3650503-3-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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In kfuncs, a "trusted" pointer is a pointer that the kfunc can assume is
safe, and which the verifier will allow to be passed to a
KF_TRUSTED_ARGS kfunc. Currently, a KF_TRUSTED_ARGS kfunc disallows any
pointer to be passed at a nonzero offset, but sometimes this is in fact
safe if the "nested" pointer's lifetime is inherited from its parent.
For example, the const cpumask_t *cpus_ptr field in a struct task_struct
will remain valid until the task itself is destroyed, and thus would
also be safe to pass to a KF_TRUSTED_ARGS kfunc.
While it would be conceptually simple to enable this by using BTF tags,
gcc unfortunately does not yet support this. In the interim, this patch
enables support for this by using a type-naming convention. A new
BTF_TYPE_SAFE_NESTED macro is defined in verifier.c which allows a
developer to specify the nested fields of a type which are considered
trusted if its parent is also trusted. The verifier is also updated to
account for this. A patch with selftests will be added in a follow-on
change, along with documentation for this feature.
Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20230120192523.3650503-2-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Pablo Neira Ayuso says:
====================
Netfilter fixes for net
1) Perform SCTP vtag verification for ABORT/SHUTDOWN_COMPLETE according
to RFC 9260, Sect 8.5.1.
2) Fix infinite loop if SCTP chunk size is zero in for_each_sctp_chunk().
And remove useless check in this macro too.
3) Revert DATA_SENT state in the SCTP tracker, this was applied in the
previous merge window. Next patch in this series provides a more
simple approach to multihoming support.
4) Unify HEARTBEAT_ACKED and ESTABLISHED states for SCTP multihoming
support, use default ESTABLISHED of 210 seconds based on
heartbeat timeout * maximum number of retransmission + round-trip timeout.
Otherwise, SCTP conntrack entry that represents secondary paths
remain stale in the table for up to 5 days.
This is a slightly large batch with fixes for the SCTP connection
tracking helper, all patches from Sriram Yagnaraman.
* git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
netfilter: conntrack: unify established states for SCTP paths
Revert "netfilter: conntrack: add sctp DATA_SENT state"
netfilter: conntrack: fix bug in for_each_sctp_chunk
netfilter: conntrack: fix vtag checks for ABORT/SHUTDOWN_COMPLETE
====================
Link: https://lore.kernel.org/r/20230124183933.4752-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Commit a286ba738714 ("ice: reorder PF/representor devlink
port register/unregister flows") moved the code to create
and destroy the devlink PF port. This was fine, but created
a corner case issue in the case of ice_register_netdev()
failing. In that case, the driver would end up calling
ice_devlink_destroy_pf_port() twice.
Additionally, it makes no sense to tie creation of the devlink
PF port to the creation of the netdev so separate out the
code to create/destroy the devlink PF port from the netdev
code. This makes it a cleaner interface.
Fixes: a286ba738714 ("ice: reorder PF/representor devlink port register/unregister flows")
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230124005714.3996270-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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We don't read the verify_enabled variable from hardware in the MAC Merge
layer state GET operation, instead we always leave it set to "false".
The user may think something is wrong if they set verify_enabled to
true, then read it back and see it's still false, even though the
configuration took place.
Fixes: 6505b6805655 ("net: mscc: ocelot: add MAC Merge layer support for VSC9959")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230123184538.3420098-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Currently, if you bind the socket to something like:
servaddr.sin6_family = AF_INET6;
servaddr.sin6_port = htons(0);
servaddr.sin6_scope_id = 0;
inet_pton(AF_INET6, "::1", &servaddr.sin6_addr);
And then request a connect to:
connaddr.sin6_family = AF_INET6;
connaddr.sin6_port = htons(20000);
connaddr.sin6_scope_id = if_nametoindex("lo");
inet_pton(AF_INET6, "fe88::1", &connaddr.sin6_addr);
What the stack does is:
- bind the socket
- create a new asoc
- to handle the connect
- copy the addresses that can be used for the given scope
- try to connect
But the copy returns 0 addresses, and the effect is that it ends up
trying to connect as if the socket wasn't bound, which is not the
desired behavior. This unexpected behavior also allows KASLR leaks
through SCTP diag interface.
The fix here then is, if when trying to copy the addresses that can
be used for the scope used in connect() it returns 0 addresses, bail
out. This is what TCP does with a similar reproducer.
Reported-by: Pietro Borrello <borrello@diag.uniroma1.it>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/9fcd182f1099f86c6661f3717f63712ddd1c676c.1674496737.git.marcelo.leitner@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
Pull module fix from Luis Chamberlain:
"Theis is a fix we have been delaying for v6.2 due to lack of early
testing on linux-next.
The commit has been sitting in linux-next since December and testing
has also been now a bit extensive by a few developers. Since this is a
fix which definitely will go to v6.3 it should also apply to v6.2 so
if there are any issues we pick them up earlier rather than later. The
fix fixes a regression since v5.3, prior to me helping with module
maintenance, however, the issue is real in that in the worst case now
can prevent boot.
We've discussed all possible corner cases [0] and at last do feel this
is ready for v6.2-rc6"
Link https://lore.kernel.org/all/Y9A4fiobL6IHp%2F%2FP@bombadil.infradead.org/ [0]
* tag 'modules-6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
module: Don't wait for GOING modules
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The changes in this patch are as follows:
- Alter the logic of get/set_eeprom functions to use the helper function
nfp_app_from_netdev() which handles differentiating between an nfp_net
and a nfp_repr. This allows us to get an agnostic backpointer to the
pdev.
- Enable the various eeprom commands by adding the 'get_eeprom_len',
'get_eeprom', 'set_eeprom' callbacks to the nfp_port_ethtool_ops struct.
This allows the eeprom commands to work on representor interfaces,
similar to a previous patch which added it to the vnics.
Currently these are being used to configure persistent MAC addresses for
the physical ports on the nfp.
Signed-off-by: James Hershaw <james.hershaw@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230123134135.293278-1-simon.horman@corigine.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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As reported by syzbot and hinted by Vinicius, I should not have added
a qdisc_synchronize() call in taprio_reset()
taprio_reset() can be called with qdisc spinlock held (and BH disabled)
as shown in included syzbot report [1].
Only taprio_destroy() needed this synchronization, as explained
in the blamed commit changelog.
[1]
BUG: scheduling while atomic: syz-executor150/5091/0x00000202
2 locks held by syz-executor150/5091:
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0
Kernel panic - not syncing: scheduling while atomic: panic_on_warn set ...
CPU: 1 PID: 5091 Comm: syz-executor150 Not tainted 6.2.0-rc3-syzkaller-00219-g010a74f52203 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
panic+0x2cc/0x626 kernel/panic.c:318
check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:238
__schedule_bug.cold+0xd5/0xfe kernel/sched/core.c:5836
schedule_debug kernel/sched/core.c:5865 [inline]
__schedule+0x34e4/0x5450 kernel/sched/core.c:6500
schedule+0xde/0x1b0 kernel/sched/core.c:6682
schedule_timeout+0x14e/0x2a0 kernel/time/timer.c:2167
schedule_timeout_uninterruptible kernel/time/timer.c:2201 [inline]
msleep+0xb6/0x100 kernel/time/timer.c:2322
qdisc_synchronize include/net/sch_generic.h:1295 [inline]
taprio_reset+0x93/0x270 net/sched/sch_taprio.c:1703
qdisc_reset+0x10c/0x770 net/sched/sch_generic.c:1022
dev_reset_queue+0x92/0x130 net/sched/sch_generic.c:1285
netdev_for_each_tx_queue include/linux/netdevice.h:2464 [inline]
dev_deactivate_many+0x36d/0x9f0 net/sched/sch_generic.c:1351
dev_deactivate+0xed/0x1b0 net/sched/sch_generic.c:1374
qdisc_graft+0xe4a/0x1380 net/sched/sch_api.c:1080
tc_modify_qdisc+0xb6b/0x19a0 net/sched/sch_api.c:1689
rtnetlink_rcv_msg+0x43e/0xca0 net/core/rtnetlink.c:6141
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2564
netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1356
netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1932
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xd3/0x120 net/socket.c:734
____sys_sendmsg+0x712/0x8c0 net/socket.c:2476
___sys_sendmsg+0x110/0x1b0 net/socket.c:2530
__sys_sendmsg+0xf7/0x1c0 net/socket.c:2559
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
Fixes: 3a415d59c1db ("net/sched: sch_taprio: fix possible use-after-free")
Link: https://lore.kernel.org/netdev/167387581653.2747.13878941339893288655.git-patchwork-notify@kernel.org/T/
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Link: https://lore.kernel.org/r/20230123084552.574396-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
This function is only used in net/ipv6/route.c and has no reason to be
visible outside of it.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/50706db7f675e40b3594d62011d9363dce32b92e.1674495822.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Pull rust fix from Miguel Ojeda:
- Avoid evaluating arguments in 'pr_*' macros in 'unsafe' blocks
* tag 'rust-fixes-6.2' of https://github.com/Rust-for-Linux/linux:
rust: print: avoid evaluating arguments in `pr_*` macros in `unsafe` blocks
|
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Pull kvm fixes from Paolo Bonzini:
"ARM64:
- Pass the correct address to mte_clear_page_tags() on initialising a
tagged page
- Plug a race against a GICv4.1 doorbell interrupt while saving the
vgic-v3 pending state.
x86:
- A command line parsing fix and a clang compilation fix for
selftests
- A fix for a longstanding VMX issue, that surprisingly was only
found now to affect real world guests"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: selftests: Make reclaim_period_ms input always be positive
KVM: x86/vmx: Do not skip segment attributes if unusable bit is set
selftests: kvm: move declaration at the beginning of main()
KVM: arm64: GICv4.1: Fix race with doorbell on VPE activation/deactivation
KVM: arm64: Pass the actual page address to mte_clear_page_tags()
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Six fixes, all in drivers.
The biggest are the UFS devfreq fixes which address a lock inversion
and the two iscsi_tcp fixes which try to prevent a use after free from
userspace still accessing an area which the kernel has released (seen
by KASAN)"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: device_handler: alua: Remove a might_sleep() annotation
scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress
scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress
scsi: ufs: core: Fix devfreq deadlocks
scsi: hpsa: Fix allocation size for scsi_host_alloc()
scsi: target: core: Fix warning on RT kernels
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Commit 2c7bc10d0f7b ("netlink: add macro for checking dump ctx size")
misspelled the name of the assert as asset, missing an R.
Reported-by: Ido Schimmel <idosch@idosch.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/20230123222224.732338-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fix from Chuck Lever:
- Nail another UAF in NFSD's filecache
* tag 'nfsd-6.2-5' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
nfsd: don't free files unconditionally in __nfsd_file_cache_purge
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Pull fscrypt MAINTAINERS entry update from Eric Biggers:
"Update the MAINTAINERS file entry for fscrypt"
* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/linux:
MAINTAINERS: update fscrypt git repo
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During a system boot, it can happen that the kernel receives a burst of
requests to insert the same module but loading it eventually fails
during its init call. For instance, udev can make a request to insert
a frequency module for each individual CPU when another frequency module
is already loaded which causes the init function of the new module to
return an error.
Since commit 6e6de3dee51a ("kernel/module.c: Only return -EEXIST for
modules that have finished loading"), the kernel waits for modules in
MODULE_STATE_GOING state to finish unloading before making another
attempt to load the same module.
This creates unnecessary work in the described scenario and delays the
boot. In the worst case, it can prevent udev from loading drivers for
other devices and might cause timeouts of services waiting on them and
subsequently a failed boot.
This patch attempts a different solution for the problem 6e6de3dee51a
was trying to solve. Rather than waiting for the unloading to complete,
it returns a different error code (-EBUSY) for modules in the GOING
state. This should avoid the error situation that was described in
6e6de3dee51a (user space attempting to load a dependent module because
the -EEXIST error code would suggest to user space that the first module
had been loaded successfully), while avoiding the delay situation too.
This has been tested on linux-next since December 2022 and passes
all kmod selftests except test 0009 with module compression enabled
but it has been confirmed that this issue has existed and has gone
unnoticed since prior to this commit and can also be reproduced without
module compression with a simple usleep(5000000) on tools/modprobe.c [0].
These failures are caused by hitting the kernel mod_concurrent_max and can
happen either due to a self inflicted kernel module auto-loead DoS somehow
or on a system with large CPU count and each CPU count incorrectly triggering
many module auto-loads. Both of those issues need to be fixed in-kernel.
[0] https://lore.kernel.org/all/Y9A4fiobL6IHp%2F%2FP@bombadil.infradead.org/
Fixes: 6e6de3dee51a ("kernel/module.c: Only return -EEXIST for modules that have finished loading")
Co-developed-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: Petr Mladek <pmladek@suse.com>
[mcgrof: enhance commit log with testing and kmod test result interpretation ]
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
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Pull fsverity MAINTAINERS entry update from Eric Biggers:
"Update the MAINTAINERS file entry for fsverity"
* tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fsverity/linux:
MAINTAINERS: update fsverity git repo, list, and patchwork
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Commit f3bbac32475b ("ext4: deal with legacy signed xattr name hash
values") added a hashing function for the legacy case of having the
xattr hash calculated using a signed 'char' type. It left the unsigned
case alone, since it's all implicitly handled by the '-funsigned-char'
compiler option.
However, there's been some noise about back-porting it all into stable
kernels that lack the '-funsigned-char', so let's just make that at
least possible by making the whole 'this uses unsigned char' very
explicit in the code itself. Whether such a back-port is really
warranted or not, I'll leave to others, but at least together with this
change it is technically sensible.
Also, add a 'pr_warn_once()' for reporting the "hey, signedness for this
hash calculation has changed" issue. Hopefully it never triggers except
for that xfstests generic/454 test-case, but even if it does it's just
good information to have.
If for no other reason than "we can remove the legacy signed hash code
entirely if nobody ever sees the message any more".
Cc: Sasha Levin <sashal@kernel.org>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Andreas Dilger <adilger@dilger.ca>
Cc: Theodore Ts'o <tytso@mit.edu>,
Cc: Jason Donenfeld <Jason@zx2c4.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This reverts commit 0ad999c1eec879f06cc52ef7df4d0dbee4a2d7eb, reversing
changes made to e38553bdc377e3e7a6caa9dd9770d8b644d8dac3.
It was not intended for net.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Fix modulo zero, division by zero, overflow, and underflow. Also clarify how
a negative immediate value is used in unsigned division.
Signed-off-by: Dave Thaler <dthaler@microsoft.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230124001218.827-1-dthaler1968@googlemail.com
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This cycle we ported all filesystems to the new posix acl api. While
looking at further simplifications in this area to remove the last
remnants of the generic dummy posix acl handlers we realized that we
regressed fuse daemons that don't set FUSE_POSIX_ACL but still make use
of posix acls.
With the change to a dedicated posix acl api interacting with posix acls
doesn't go through the old xattr codepaths anymore and instead only
relies the get acl and set acl inode operations.
Before this change fuse daemons that don't set FUSE_POSIX_ACL were able
to get and set posix acl albeit with two caveats. First, that posix acls
aren't cached. And second, that they aren't used for permission checking
in the vfs.
We regressed that use-case as we currently refuse to retrieve any posix
acls if they aren't enabled via FUSE_POSIX_ACL. So older fuse daemons
would see a change in behavior.
We can restore the old behavior in multiple ways. We could change the
new posix acl api and look for a dedicated xattr handler and if we find
one prefer that over the dedicated posix acl api. That would break the
consistency of the new posix acl api so we would very much prefer not to
do that.
We could introduce a new ACL_*_CACHE sentinel that would instruct the
vfs permission checking codepath to not call into the filesystem and
ignore acls.
But a more straightforward fix for v6.2 is to do the same thing that
Overlayfs does and give fuse a separate get acl method for permission
checking. Overlayfs uses this to express different needs for vfs
permission lookup and acl based retrieval via the regular system call
path as well. Let fuse do the same for now. This way fuse can continue
to refuse to retrieve posix acls for daemons that don't set
FUSE_POSXI_ACL for permission checking while allowing a fuse server to
retrieve it via the usual system calls.
In the future, we could extend the get acl inode operation to not just
pass a simple boolean to indicate rcu lookup but instead make it a flag
argument. Then in addition to passing the information that this is an
rcu lookup to the filesystem we could also introduce a flag that tells
the filesystem that this is a request from the vfs to use these acls for
permission checking. Then fuse could refuse the get acl request for
permission checking when the daemon doesn't have FUSE_POSIX_ACL set in
the same get acl method. This would also help Overlayfs and allow us to
remove the second method for it as well.
But since that change is more invasive as we need to update the get acl
inode operation for multiple filesystems we should not do this as a fix
for v6.2. Instead we will do this for the v6.3 merge window.
Fwiw, since posix acls are now always correctly translated in the new
posix acl api we could also allow them to be used for daemons without
FUSE_POSIX_ACL that are not mounted on the host. But this is behavioral
change and again if dones should be done for v6.3. For now, let's just
restore the original behavior.
A nice side-effect of this change is that for fuse daemons with and
without FUSE_POSIX_ACL the same code is used for posix acls in a
backwards compatible way. This also means we can remove the legacy xattr
handlers completely. We've also added comments to explain the expected
behavior for daemons without FUSE_POSIX_ACL into the code.
Fixes: 318e66856dde ("xattr: use posix acl api")
Signed-off-by: Seth Forshee (Digital Ocean) <sforshee@kernel.org>
Reviewed-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
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syzbot reported a use-after-free in do_accept(), precisely nr_accept()
as sk_prot_alloc() allocated the memory and sock_put() frees it. [0]
The issue could happen if the heartbeat timer is fired and
nr_heartbeat_expiry() calls nr_destroy_socket(), where a socket
has SOCK_DESTROY or a listening socket has SOCK_DEAD.
In this case, the first condition cannot be true. SOCK_DESTROY is
flagged in nr_release() only when the file descriptor is close()d,
but accept() is being called for the listening socket, so the second
condition must be true.
Usually, the AF_NETROM listener neither starts timers nor sets
SOCK_DEAD. However, the condition is met if connect() fails before
listen(). connect() starts the t1 timer and heartbeat timer, and
t1timer calls nr_disconnect() when timeout happens. Then, SOCK_DEAD
is set, and if we call listen(), the heartbeat timer calls
nr_destroy_socket().
nr_connect
nr_establish_data_link(sk)
nr_start_t1timer(sk)
nr_start_heartbeat(sk)
nr_t1timer_expiry
nr_disconnect(sk, ETIMEDOUT)
nr_sk(sk)->state = NR_STATE_0
sk->sk_state = TCP_CLOSE
sock_set_flag(sk, SOCK_DEAD)
nr_listen
if (sk->sk_state != TCP_LISTEN)
sk->sk_state = TCP_LISTEN
nr_heartbeat_expiry
switch (nr->state)
case NR_STATE_0
if (sk->sk_state == TCP_LISTEN &&
sock_flag(sk, SOCK_DEAD))
nr_destroy_socket(sk)
This path seems expected, and nr_destroy_socket() is called to clean
up resources. Initially, there was sock_hold() before nr_destroy_socket()
so that the socket would not be freed, but the commit 517a16b1a88b
("netrom: Decrease sock refcount when sock timers expire") accidentally
removed it.
To fix use-after-free, let's add sock_hold().
[0]:
BUG: KASAN: use-after-free in do_accept+0x483/0x510 net/socket.c:1848
Read of size 8 at addr ffff88807978d398 by task syz-executor.3/5315
CPU: 0 PID: 5315 Comm: syz-executor.3 Not tainted 6.2.0-rc3-syzkaller-00165-gd9fc1511728c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:306 [inline]
print_report+0x15e/0x461 mm/kasan/report.c:417
kasan_report+0xbf/0x1f0 mm/kasan/report.c:517
do_accept+0x483/0x510 net/socket.c:1848
__sys_accept4_file net/socket.c:1897 [inline]
__sys_accept4+0x9a/0x120 net/socket.c:1927
__do_sys_accept net/socket.c:1944 [inline]
__se_sys_accept net/socket.c:1941 [inline]
__x64_sys_accept+0x75/0xb0 net/socket.c:1941
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa436a8c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa437784168 EFLAGS: 00000246 ORIG_RAX: 000000000000002b
RAX: ffffffffffffffda RBX: 00007fa436bac050 RCX: 00007fa436a8c0c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fa436ae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffebc6700df R14: 00007fa437784300 R15: 0000000000022000
</TASK>
Allocated by task 5294:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:371 [inline]
____kasan_kmalloc mm/kasan/common.c:330 [inline]
__kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:380
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:968 [inline]
__kmalloc+0x5a/0xd0 mm/slab_common.c:981
kmalloc include/linux/slab.h:584 [inline]
sk_prot_alloc+0x140/0x290 net/core/sock.c:2038
sk_alloc+0x3a/0x7a0 net/core/sock.c:2091
nr_create+0xb6/0x5f0 net/netrom/af_netrom.c:433
__sock_create+0x359/0x790 net/socket.c:1515
sock_create net/socket.c:1566 [inline]
__sys_socket_create net/socket.c:1603 [inline]
__sys_socket_create net/socket.c:1588 [inline]
__sys_socket+0x133/0x250 net/socket.c:1636
__do_sys_socket net/socket.c:1649 [inline]
__se_sys_socket net/socket.c:1647 [inline]
__x64_sys_socket+0x73/0xb0 net/socket.c:1647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 14:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:518
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:177 [inline]
__cache_free mm/slab.c:3394 [inline]
__do_kmem_cache_free mm/slab.c:3580 [inline]
__kmem_cache_free+0xcd/0x3b0 mm/slab.c:3587
sk_prot_free net/core/sock.c:2074 [inline]
__sk_destruct+0x5df/0x750 net/core/sock.c:2166
sk_destruct net/core/sock.c:2181 [inline]
__sk_free+0x175/0x460 net/core/sock.c:2192
sk_free+0x7c/0xa0 net/core/sock.c:2203
sock_put include/net/sock.h:1991 [inline]
nr_heartbeat_expiry+0x1d7/0x460 net/netrom/nr_timer.c:148
call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700
expire_timers+0x2c6/0x5c0 kernel/time/timer.c:1751
__run_timers kernel/time/timer.c:2022 [inline]
__run_timers kernel/time/timer.c:1995 [inline]
run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
__do_softirq+0x1fb/0xadc kernel/softirq.c:571
Fixes: 517a16b1a88b ("netrom: Decrease sock refcount when sock timers expire")
Reported-by: syzbot+5fafd5cfe1fc91f6b352@syzkaller.appspotmail.com
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20230120231927.51711-1-kuniyu@amazon.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Jakub Kicinski says:
====================
Netlink protocol specs
I think the Netlink proto specs are far along enough to merge.
Filling in all attribute types and quirks will be an ongoing
effort but we have enough to cover FOU so it's somewhat complete.
I fully intend to continue polishing the code but at the same
time I'd like to start helping others base their work on the
specs (e.g. DPLL) and need to start working on some new families
myself.
That's the progress / motivation for merging. The RFC [1] has more
of a high level blurb, plus I created a lot of documentation, I'm
not going to repeat it here. There was also the talk at LPC [2].
[1] https://lore.kernel.org/all/20220811022304.583300-1-kuba@kernel.org/
[2] https://youtu.be/9QkXIQXkaQk?t=2562
v2: https://lore.kernel.org/all/20220930023418.1346263-1-kuba@kernel.org/
v3: https://lore.kernel.org/all/20230119003613.111778-1-kuba@kernel.org/1
v4:
- spec improvements (patch 2)
- Python cleanup (patch 3)
- rename auto-gen files and use the right comment style
====================
Link: https://lore.kernel.org/r/20230120175041.342573-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Add a CLI sample which can take in arbitrary request
in JSON format, convert it to Netlink and do the inverse
for output.
It's meant as a development tool primarily and perhaps
for selftests which need to tickle netlink in a special way.
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Generate and plug in the spec-based tables.
A little bit of renaming is needed in the FOU code.
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
We'll need to link two objects together to form the fou module.
This means the source can't be called fou, the build system expects
fou.o to be the combined object.
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Regenerate the FOU uAPI header from the YAML spec.
The flags now come before attributes which use them,
and the comments for type disappear (coders should look
at the spec instead).
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
FOU has a reasonably modern Genetlink family. Add a spec.
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Code generators to turn Netlink specs into C code.
I'm definitely not proud of it.
The main generator is in Python, there's a bash script
to regen all code-gen'ed files in tree after making
spec changes.
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Add schemas for Netlink spec files. As described in the docs
we have 4 "protocols" or compatibility levels, and each one
comes with its own schema, but the more general / legacy
schemas are superset of more modern ones: genetlink is
the smallest followed by genetlink-c and genetlink-legacy.
There is no schema for raw netlink, yet, I haven't found the time..
I don't know enough jsonschema to do inheritance or something
but the repetition is not too bad. I hope.
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
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Add documentation about the upcoming Netlink protocol specs.
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Davide Caratti says:
====================
net/sched: use the backlog for nested mirred ingress
TC mirred has a protection against excessive stack growth, but that
protection doesn't really guarantee the absence of recursion, nor
it guards against loops. Patch 1/2 rewords "recursion" to "nesting" to
make this more clear.
We can leverage on this existing mechanism to prevent TCP / SCTP from doing
soft lock-up in some specific scenarios that uses mirred egress->ingress:
patch 2 changes mirred so that the networking backlog is used for nested
mirred ingress actions.
====================
Link: https://lore.kernel.org/r/cover.1674233458.git.dcaratti@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
