diff options
| author | Dmitry Safonov <dima@arista.com> | 2018-07-30 18:32:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-03 07:50:45 +0200 |
| commit | fffd3058eaf438e71cd301c14a0c67161a5864df (patch) | |
| tree | 6b7d1d0d6f5d8db48a88de880543696fa90d4a4e /net/ipv4/tcp_input.c | |
| parent | e208cda5f10e131f149e59d7de4ceb943382f4c6 (diff) | |
netlink: Don't shift with UB on nlk->ngroups
[ Upstream commit 61f4b23769f0cc72ae62c9a81cf08f0397d40da8 ]
On i386 nlk->ngroups might be 32 or 0. Which leads to UB, resulting in
hang during boot.
Check for 0 ngroups and use (unsigned long long) as a type to shift.
Fixes: 7acf9d4237c4 ("netlink: Do not subscribe to non-existent groups").
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/tcp_input.c')
0 files changed, 0 insertions, 0 deletions