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| author | Neil Horman <nhorman@redhat.com> | 2005-09-06 15:17:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-07 16:57:30 -0700 |
| commit | f62c6d0a2607b2d1fdf280d4d1467a7a6e24c67d (patch) | |
| tree | b95a3ebe7a0e2703c38636530313bcc1dfd96564 /drivers/block/genhd.c | |
| parent | f23ef184b486ac021b6a471b4e94cfa04860d3b0 (diff) | |
| download | lwn-f62c6d0a2607b2d1fdf280d4d1467a7a6e24c67d.tar.gz lwn-f62c6d0a2607b2d1fdf280d4d1467a7a6e24c67d.zip | |
[PATCH] Add missing overflow check in get_blkdev_list
Patch to clean up missing overflow check in get_blkdev_list. The printf
which adds the "Block Devices" string in /proc/devices can overflow the
presented page if get_chrdev_list eats up the entire 4k space.
Signed-off-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/block/genhd.c')
| -rw-r--r-- | drivers/block/genhd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/genhd.c b/drivers/block/genhd.c index 47fd3659a061..d42840cc0d1d 100644 --- a/drivers/block/genhd.c +++ b/drivers/block/genhd.c @@ -45,7 +45,7 @@ int get_blkdev_list(char *p, int used) struct blk_major_name *n; int i, len; - len = sprintf(p, "\nBlock devices:\n"); + len = snprintf(p, (PAGE_SIZE-used), "\nBlock devices:\n"); down(&block_subsys_sem); for (i = 0; i < ARRAY_SIZE(major_names); i++) { |