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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2022-10-10 14:59:02 +0900 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2022-10-11 10:08:26 -0400 |
| commit | bd86c69dae65de30f6d47249418ba7889809e31a (patch) | |
| tree | 8bc8039109fb10eb154db10f6280c481bbd843dd /fs/nfsd/cache.h | |
| parent | 243a5263014a30436c93ed3f1f864c1da845455e (diff) | |
NFSD: unregister shrinker when nfsd_init_net() fails
syzbot is reporting UAF read at register_shrinker_prepared() [1], for
commit 7746b32f467b3813 ("NFSD: add shrinker to reap courtesy clients on
low memory condition") missed that nfsd4_leases_net_shutdown() from
nfsd_exit_net() is called only when nfsd_init_net() succeeded.
If nfsd_init_net() fails due to nfsd_reply_cache_init() failure,
register_shrinker() from nfsd4_init_leases_net() has to be undone
before nfsd_init_net() returns.
Link: https://syzkaller.appspot.com/bug?extid=ff796f04613b4c84ad89 [1]
Reported-by: syzbot <syzbot+ff796f04613b4c84ad89@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 7746b32f467b3813 ("NFSD: add shrinker to reap courtesy clients on low memory condition")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd/cache.h')
0 files changed, 0 insertions, 0 deletions