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| author |   Dmitry Safonov <dima@arista.com> | 2018-07-30 18:32:36 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-07-30 12:42:22 -0700 |
| commit | 61f4b23769f0cc72ae62c9a81cf08f0397d40da8 (patch) | |
| tree | 14625a2389a9357a44870604c3bff5f80ee3edcd /net/xdp | |
| parent | Merge tag 'linux-can-fixes-for-4.18-20180730' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can (diff) | |
| download | linux-dev-61f4b23769f0cc72ae62c9a81cf08f0397d40da8.tar.xz linux-dev-61f4b23769f0cc72ae62c9a81cf08f0397d40da8.zip | |
netlink: Don't shift with UB on nlk->ngroups
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>
Diffstat (limited to 'net/xdp')
0 files changed, 0 insertions, 0 deletions