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| author | Eric Dumazet <edumazet@google.com> | 2022-02-16 21:20:37 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-02-17 19:41:54 +0300 |
| commit | be6b41c15dc09c067492bd23668763f551747e4e (patch) | |
| tree | 3326aea689f69ff1392b14ac63d47bc27b0fd044 /net/ipv4/fib_semantics.c | |
| parent | faab39f63c1fc4bcdf135690f03bd596b578c67e (diff) | |
| download | linux-be6b41c15dc09c067492bd23668763f551747e4e.tar.xz | |
ipv6/addrconf: ensure addrconf_verify_rtnl() has completed
Before freeing the hash table in addrconf_exit_net(),
we need to make sure the work queue has completed,
or risk NULL dereference or UAF.
Thus, use cancel_delayed_work_sync() to enforce this.
We do not hold RTNL in addrconf_exit_net(), making this safe.
Fixes: 8805d13ff1b2 ("ipv6/addrconf: use one delayed work per netns")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220216182037.3742-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/fib_semantics.c')
0 files changed, 0 insertions, 0 deletions