]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
mm/maccess.c: actually return -EFAULT from strncpy_from_unsafe
authorRasmus Villemoes <linux@rasmusvillemoes.dk>
Fri, 6 Nov 2015 02:50:11 +0000 (18:50 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 6 Nov 2015 03:34:48 +0000 (19:34 -0800)
commit9dd861d55b01f1d0848f82007e8665371ae18710
tree537eb40b4eed90c1d673b3bd76cdb6860150df12
parent3acaea6804b3a10e996ce6ebc342089f481e1cdb
mm/maccess.c: actually return -EFAULT from strncpy_from_unsafe

As far as I can tell, strncpy_from_unsafe never returns -EFAULT.  ret is
the result of a __copy_from_user_inatomic(), which is 0 for success and
positive (in this case necessarily 1) for access error - it is never
negative.  So we were always returning the length of the, possibly
truncated, destination string.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/maccess.c