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authorTakashi Iwai <tiwai@suse.de>2020-03-22 14:03:03 +0800
committerJens Axboe <axboe@kernel.dk>2020-03-22 10:06:57 -0600
commit9876e38609a8ea98bbb447eb5a8f1c0400a6ccb8 (patch)
treec8cd41f891b631399a578b22e7fd1ce115441f82 /drivers/md
parentb144e45fc57649e15cbc79ff2d32a942af1d91d5 (diff)
downloadlinux-9876e38609a8ea98bbb447eb5a8f1c0400a6ccb8.tar.bz2
bcache: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the actual output size, the succeeding calls may go beyond the given buffer limit. Fix it by replacing with scnprintf(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/bcache/sysfs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 3470fae4eabc..323276994aab 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -154,7 +154,7 @@ static ssize_t bch_snprint_string_list(char *buf,
size_t i;
for (i = 0; list[i]; i++)
- out += snprintf(out, buf + size - out,
+ out += scnprintf(out, buf + size - out,
i == selected ? "[%s] " : "%s ", list[i]);
out[-1] = '\n';