linux/security
Konstantin Khlebnikov b862e561ba Smack: handle zero-length security labels without panic
Zero-length security labels are invalid but kernel should handle them.

This patch fixes kernel panic after setting zero-length security labels:
# attr -S -s "SMACK64" -V "" file

And after writing zero-length string into smackfs files syslog and onlycp:
# python -c 'import os; os.write(1, "")' > /smack/syslog

The problem is caused by brain-damaged logic in function smk_parse_smack()
which takes pointer to buffer and its length but if length below or equal zero
it thinks that the buffer is zero-terminated. Unfortunately callers of this
function are widely used and proper fix requires serious refactoring.

Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
2014-08-08 14:51:07 -07:00
..
apparmor sched: move no_new_privs into new atomic flags 2014-07-18 12:13:38 -07:00
integrity ima: add support for measuring and appraising firmware 2014-07-25 11:47:46 -07:00
keys KEYS: revert encrypted key change 2014-07-28 12:36:17 +01:00
selinux Merge branch 'next' of git://git.infradead.org/users/pcmoore/selinux into next 2014-08-02 22:58:02 +10:00
smack Smack: handle zero-length security labels without panic 2014-08-08 14:51:07 -07:00
tomoyo get rid of pointless checks for NULL ->i_op 2014-04-01 23:19:16 -04:00
yama yama: Better permission check for ptraceme 2013-03-26 13:17:58 -07:00
capability.c security: introduce kernel_fw_from_file hook 2014-07-25 11:47:45 -07:00
commoncap.c CAPABILITIES: remove undefined caps from all processes 2014-07-24 21:53:47 +10:00
device_cgroup.c device_cgroup: use css_has_online_children() instead of has_children() 2014-05-16 13:22:52 -04:00
inode.c securityfs: fix object creation races 2012-01-10 10:20:35 -05:00
Kconfig security: select correct default LSM_MMAP_MIN_ADDR on arm on arm64 2014-02-05 14:59:14 +00:00
lsm_audit.c audit: anchor all pid references in the initial pid namespace 2014-03-20 10:11:55 -04:00
Makefile security: cleanup Makefiles to use standard syntax for specifying sub-directories 2014-02-17 11:08:04 +11:00
min_addr.c mmap_min_addr check CAP_SYS_RAWIO only for write 2010-04-23 08:56:31 +10:00
security.c ima: add support for measuring and appraising firmware 2014-07-25 11:47:46 -07:00