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| author | Jan Kara <jack@suse.cz> | 2015-06-02 17:10:28 +0200 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-06-03 11:33:08 +0200 |
| commit | 1a3b140801f7ad16c40c5f170a0b77b92149c269 (patch) | |
| tree | 48deb8a6cef3478046b2d99d692e10a32ede0573 /fs/dcache.c | |
| parent | ddafeade843ee16b8a7c9ef9ac8b3792a0b83048 (diff) | |
| download | lwn-1a3b140801f7ad16c40c5f170a0b77b92149c269.tar.gz lwn-1a3b140801f7ad16c40c5f170a0b77b92149c269.zip | |
lib: Fix strnlen_user() to not touch memory after specified maximum
commit f18c34e483ff6b1d9866472221e4015b3a4698e4 upstream.
If the specified maximum length of the string is a multiple of unsigned
long, we would load one long behind the specified maximum. If that
happens to be in a next page, we can hit a page fault although we were
not expected to.
Fix the off-by-one bug in the test whether we are at the end of the
specified range.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'fs/dcache.c')
0 files changed, 0 insertions, 0 deletions