Eric Biggers d124b2c53c FS-Cache: fix dereference of NULL user_key_payload ... When the file /proc/fs/fscache/objects (available with CONFIG_FSCACHE_OBJECT_LIST=y) is opened, we request a user key with description "fscache:objlist", then access its payload. However, a revoked key has a NULL payload, and we failed to check for this. request_key() *does* skip revoked keys, but there is still a window where the key can be revoked before we access its payload. Fix it by checking for a NULL payload, treating it like a key which was already revoked at the time it was requested. Fixes: 4fbf4291aa ("FS-Cache: Allow the current state of all objects to be dumped") Reviewed-by: James Morris <james.l.morris@oracle.com> Cc: <stable@vger.kernel.org> [v2.6.32+] Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com>		2017-10-12 17:16:40 +01:00
..
cache.c	fs/fscache: convert printk to pr_foo()	2014-06-04 16:53:51 -07:00
cookie.c	fscache: Clear outstanding writes when disabling a cookie	2017-01-31 13:23:09 -05:00
fsdef.c	FS-Cache: Provide the ability to enable/disable cookies	2013-09-27 18:40:25 +01:00
histogram.c	drop redundant ->owner initializations	2016-05-29 19:08:00 -04:00
internal.h	FS-Cache: The operation cancellation method needs calling in more places	2015-04-02 14:28:53 +01:00
Kconfig	fscache: drop references to slow-work	2010-07-22 22:58:58 +02:00
main.c	fs/fscache: make ctl_table static	2014-08-06 18:01:12 -07:00
Makefile
netfs.c	FS-Cache: Initialise stores_lock in netfs cookie	2017-01-31 13:23:09 -05:00
object-list.c	FS-Cache: fix dereference of NULL user_key_payload	2017-10-12 17:16:40 +01:00
object.c	fscache: Fix dead object requeue	2017-01-31 13:23:09 -05:00
operation.c	FS-Cache: Retain the netfs context in the retrieval op earlier	2015-04-02 14:28:53 +01:00
page.c	mm: remove nr_pages argument from pagevec_lookup{,_range}()	2017-09-06 17:27:27 -07:00
proc.c
stats.c	drop redundant ->owner initializations	2016-05-29 19:08:00 -04:00