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linux/security
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David Howells cf8304e8f3 KEYS: Fix RCU handling in key_gc_keyring() 
key_gc_keyring() needs to either hold the RCU read lock or hold the keyring
semaphore if it's going to scan the keyring's list.  Given that it only needs
to read the key list, and it's doing so under a spinlock, the RCU read lock is
the thing to use.

Furthermore, the RCU check added in e7b0a61b79 is
incorrect as holding the spinlock on key_serial_lock is not grounds for
assuming a keyring's pointer list can be read safely.  Instead, a simple
rcu_dereference() inside of the previously mentioned RCU read lock is what we
want.

Reported-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
2010-05-05 11:39:23 +10:00
..
integrity/ima include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
keys KEYS: Fix RCU handling in key_gc_keyring() 2010-05-05 11:39:23 +10:00
selinux SELinux: Reduce max avtab size to avoid page allocation failures 2010-04-15 09:26:01 +10:00
smack include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
tomoyo include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
capability.c Security: add static to security_ops and default_security_ops variable 2010-02-24 08:11:02 +11:00
commoncap.c syslog: clean up needless comment 2010-02-05 17:48:51 +11:00
device_cgroup.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
inode.c security: testing the wrong variable in create_by_name() 2010-04-22 21:17:41 +10:00
Kconfig remove CONFIG_SECURITY_FILE_CAPABILITIES compile option 2009-11-24 15:06:47 +11:00
lsm_audit.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Makefile NOMMU: Optimise away the {dac_,}mmap_min_addr tests 2009-12-17 09:25:19 +11:00
min_addr.c security/min_addr.c: make init_mmap_min_addr() static 2009-12-17 09:24:22 +11:00
security.c Merge branch 'next' into for-linus 2010-03-01 09:36:31 +11:00