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bd86c69dae
linux/fs/nfsd
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Tetsuo Handa bd86c69dae NFSD: unregister shrinker when nfsd_init_net() fails 
syzbot is reporting UAF read at register_shrinker_prepared() [1], for
commit 7746b32f46 ("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: 7746b32f46 ("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>
2022-10-11 10:08:26 -04:00
..
acl.h NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
auth.c
auth.h
blocklayout.c block: remove genhd.h 2022-02-02 07:49:59 -07:00
blocklayoutxdr.c
blocklayoutxdr.h
cache.h nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops 2022-09-26 14:02:50 -04:00
current_stateid.h
export.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
export.h nfsd: report per-export stats 2021-01-25 09:36:28 -05:00
fault_inject.c nfsd: no need to check return value of debugfs_create functions 2019-07-03 16:57:17 +02:00
filecache.c nfsd: rework hashtable handling in nfsd_do_file_acquire 2022-10-05 10:57:48 -04:00
filecache.h nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_file_cache_stats_fops 2022-09-26 14:02:50 -04:00
flexfilelayout.c nfsd: use correct format characters 2022-03-17 19:47:38 -04:00
flexfilelayoutxdr.c
flexfilelayoutxdr.h
idmap.h
Kconfig NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
lockd.c NFSD: simplify struct nfsfh 2021-10-02 15:51:10 -04:00
Makefile NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
netns.h NFSD: add shrinker to reap courtesy clients on low memory condition 2022-09-26 14:02:41 -04:00
nfs2acl.c SUNRPC: Parametrize how much of argsize should be zeroed 2022-09-26 14:02:42 -04:00
nfs3acl.c SUNRPC: Parametrize how much of argsize should be zeroed 2022-09-26 14:02:42 -04:00
nfs3proc.c NFSD: Refactor common code out of dirlist helpers 2022-09-26 14:02:47 -04:00
nfs3xdr.c NFSD: Clean up WRITE arg decoders 2022-09-26 14:02:47 -04:00
nfs4acl.c NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
nfs4callback.c nfsd: make nfsd4_run_cb a bool return function 2022-09-26 14:50:57 -04:00
nfs4idmap.c NFSD: move from strlcpy with unused retval to strscpy 2022-09-26 14:02:20 -04:00
nfs4layouts.c NFSD: Add tracepoints to report NFSv4 callback completions 2022-09-26 14:02:32 -04:00
nfs4proc.c NFSD: Cap rsize_bop result based on send buffer size 2022-09-26 14:02:50 -04:00
nfs4recover.c nfsd: Propagate some error code returned by memdup_user() 2022-09-26 14:02:22 -04:00
nfs4state.c nfsd: extra checks when freeing delegation stateids 2022-09-26 14:50:58 -04:00
nfs4xdr.c NFSD: Clean up nfs4svc_encode_compoundres() 2022-09-26 14:02:48 -04:00
nfscache.c nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops 2022-09-26 14:02:50 -04:00
nfsctl.c NFSD: unregister shrinker when nfsd_init_net() fails 2022-10-11 10:08:26 -04:00
nfsd.h NFSD: add shrinker to reap courtesy clients on low memory condition 2022-09-26 14:02:41 -04:00
nfsfh.c NFSD: Replace dprintk() call site in fh_verify() 2022-09-26 14:02:31 -04:00
nfsfh.h NFSD: discard fh_locked flag and fh_lock/fh_unlock 2022-08-04 10:28:48 -04:00
nfsproc.c NFSD: Refactor common code out of dirlist helpers 2022-09-26 14:02:47 -04:00
nfssvc.c NFSD: move from strlcpy with unused retval to strscpy 2022-09-26 14:02:20 -04:00
nfsxdr.c NFSD: Clean up WRITE arg decoders 2022-09-26 14:02:47 -04:00
pnfs.h
state.h nfsd: make nfsd4_run_cb a bool return function 2022-09-26 14:50:57 -04:00
stats.c nfsd: use DEFINE_PROC_SHOW_ATTRIBUTE to define nfsd_proc_ops 2022-09-26 14:02:49 -04:00
stats.h nfsd: make nfsd_stats.th_cnt atomic_t 2021-12-13 13:42:51 -05:00
trace.c NFSD: Add SPDX header for fs/nfsd/trace.c 2020-11-30 13:00:24 -05:00
trace.h NFSD: Add a mechanism to wait for a DELEGRETURN 2022-09-26 14:02:32 -04:00
vfs.c NFSD: Make nfsd4_remove() wait before returning NFS4ERR_DELAY 2022-09-26 14:02:41 -04:00
vfs.h NFSD: drop fname and flen args from nfsd_create_locked() 2022-09-26 14:02:30 -04:00
xdr3.h SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
xdr4.h NFSD: Pack struct nfsd4_compoundres 2022-09-26 14:02:49 -04:00
xdr4cb.h
xdr.h NFSD: prevent underflow in nfssvc_decode_writeargs() 2022-03-15 09:35:56 -04:00