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linux/fs/nfsd
History
J. Bruce Fields a34207e99c nfsd: fix deadlock secinfo+readdir compound 
commit 2f6fc056e8 upstream.

nfsd_lookup_dentry exits with the parent filehandle locked.  fh_put also
unlocks if necessary (nfsd filehandle locking is probably too lenient),
so it gets unlocked eventually, but if the following op in the compound
needs to lock it again, we can deadlock.

A fuzzer ran into this; normal clients don't send a secinfo followed by
a readdir in the same compound.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2016-05-01 00:06:00 +02:00
..
acl.h nfsd4: use xdr_reserve_space in attribute encoding 2014-05-28 14:52:34 -04:00
auth.c NFSD: Cleanup unused variable in nfsd_setuser() 2014-05-30 17:32:21 -04:00
auth.h nfsd: Remove nfsd_luid, nfsd_lgid, nfsd_ruid and nfsd_rgid 2013-02-13 06:15:51 -08:00
cache.h nfsd: get rid of unused function definition 2014-01-02 17:53:23 -05:00
current_stateid.h nfsd41: use current stateid by value 2012-02-15 11:20:45 -05:00
export.c NFSD: Error out when getting more than one fsloc/secinfo/uuid 2014-05-30 17:32:25 -04:00
export.h NFSD: Using type of uint32_t for ex_nflavors instead of int 2014-05-30 17:32:24 -04:00
fault_inject.c NFSD: Use simple_read_from_buffer for coping data to userspace 2014-05-08 14:59:52 -04:00
idmap.h nfsd4: use xdr_reserve_space in attribute encoding 2014-05-28 14:52:34 -04:00
Kconfig nfsd: fix Kconfig syntax 2013-10-26 15:37:26 -04:00
lockd.c nfsd: Remove deprecated nfsctl system call and related code. 2011-07-15 18:58:42 -04:00
Makefile NFSD: Added fault injection 2011-11-07 21:10:47 -05:00
netns.h NFSD: Don't start lockd when only NFSv4 is running 2014-01-03 18:18:50 -05:00
nfs2acl.c nfsd: Remove assignments inside conditions 2014-05-22 15:52:23 -04:00
nfs3acl.c nfsd: Remove assignments inside conditions 2014-05-22 15:52:23 -04:00
nfs3proc.c switch vfs_getattr() to struct path 2013-02-26 02:46:08 -05:00
nfs3xdr.c nfsd: Remove assignments inside conditions 2014-05-22 15:52:23 -04:00
nfs4acl.c nfsd4: use xdr_reserve_space in attribute encoding 2014-05-28 14:52:34 -04:00
nfs4callback.c nfsd: Fix slot wake up race in the nfsv4.1 callback code 2014-12-10 17:14:59 +00:00
nfs4idmap.c nfsd4: use xdr_reserve_space in attribute encoding 2014-05-28 14:52:34 -04:00
nfs4proc.c nfsd: fix deadlock secinfo+readdir compound 2016-05-01 00:06:00 +02:00
nfs4recover.c nfsd: switch to %p[dD] 2013-10-24 23:34:51 -04:00
nfs4state.c nfsd: fix the check for confirmed openowner in nfs4_preprocess_stateid_op 2015-05-28 09:59:59 +01:00
nfs4xdr.c nfsd4: fix bad bounds checking 2016-05-01 00:05:52 +02:00
nfscache.c nfsd: don't halt scanning the DRC LRU list when there's an RC_INPROG entry 2014-06-06 19:22:49 -04:00
nfsctl.c nfsd: fix nsfd startup race triggering BUG_ON 2015-05-06 10:36:19 +01:00
nfsd.h nfsd: correctly define v4.2 support attributes 2014-12-10 17:14:53 +00:00
nfsfh.c SUNRPC/NFSD: Remove using of dprintk with KERN_WARNING 2014-05-30 20:25:28 -04:00
nfsfh.h nfsd: remove <linux/nfsd/nfsfh.h> 2014-05-06 17:54:53 -04:00
nfsproc.c switch vfs_getattr() to struct path 2013-02-26 02:46:08 -05:00
nfssvc.c NFSD: Decrease nfsd_users in nfsd_startup_generic fail 2014-09-05 16:36:42 -07:00
nfsxdr.c nfsd: Remove assignments inside conditions 2014-05-22 15:52:23 -04:00
state.h nfsd4: allow larger 4.1 session drc slots 2014-05-23 09:03:41 -04:00
stats.c nfsd: move <linux/nfsd/stats.h> to fs/nfsd 2014-05-06 17:54:55 -04:00
stats.h nfsd: move <linux/nfsd/stats.h> to fs/nfsd 2014-05-06 17:54:55 -04:00
vfs.c nfsd: remove unused function nfsd_read_file 2014-05-30 17:32:27 -04:00
vfs.h nfsd: remove unused function nfsd_read_file 2014-05-30 17:32:27 -04:00
xdr.h nfsd: handle vfs_getattr errors in acl protocol 2013-02-26 02:46:09 -05:00
xdr3.h nfsd: fix encode_entryplus_baggage stack usage 2014-01-23 13:50:27 -05:00
xdr4.h nfsd4: allow large readdirs 2014-05-30 17:32:03 -04:00
xdr4cb.h nfsd4: check backchannel attributes on create_session 2013-04-09 16:53:56 -04:00