lineage_android_kernel_xiao.../fs/kernfs
Bernd Edlinger 90b3fec683 kernfs: Fix range checks in kernfs_get_target_path
[ Upstream commit a75e78f21f9ad4b810868c89dbbabcc3931591ca ]

The terminating NUL byte is only there because the buffer is
allocated with kzalloc(PAGE_SIZE, GFP_KERNEL), but since the
range-check is off-by-one, and PAGE_SIZE==PATH_MAX, the
returned string may not be zero-terminated if it is exactly
PATH_MAX characters long.  Furthermore also the initial loop
may theoretically exceed PATH_MAX and cause a fault.

Signed-off-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-11-25 09:52:23 +01:00
..
Kconfig
Makefile
dir.c Merge branch 'for-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup 2016-10-14 12:18:50 -07:00
file.c kernfs: fix regression in kernfs_fop_write caused by wrong type 2018-02-17 13:21:15 +01:00
inode.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
kernfs-internal.h kernfs: Switch to generic xattr handlers 2016-10-06 22:17:38 -04:00
mount.c kernfs: Switch to generic xattr handlers 2016-10-06 22:17:38 -04:00
symlink.c kernfs: Fix range checks in kernfs_get_target_path 2019-11-25 09:52:23 +01:00