do_last(): don't let a bogus return value from ->open() et.al. to confuse us

Browse source

[ Upstream commit c80567c82a ]

... into returning a positive to path_openat(), which would interpret that
as "symlink had been encountered" and proceed to corrupt memory, etc.
It can only happen due to a bug in some ->open() instance or in some LSM
hook, etc., so we report any such event *and* make sure it doesn't trick
us into further unpleasantness.

Cc: stable@vger.kernel.org # v3.6+, at least
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

...

This commit is contained in:

Al Viro 2016-02-27 19:17:33 -05:00 • committed by Sasha Levin

parent afccdcb7bb

commit fa3fd2474b

1 changed files with 4 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

fs/namei.c

View file