https://github.com/torvalds/linux
Revision 61f4b23769f0cc72ae62c9a81cf08f0397d40da8 authored by Dmitry Safonov on 30 July 2018, 17:32:36 UTC, committed by David S. Miller on 30 July 2018, 19:42:22 UTC
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>
1 parent af87f72
History
Tip revision: 61f4b23769f0cc72ae62c9a81cf08f0397d40da8 authored by Dmitry Safonov on 30 July 2018, 17:32:36 UTC
netlink: Don't shift with UB on nlk->ngroups
Tip revision: 61f4b23
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