* [PATCH] ubifs: fix snprintf() length check
@ 2021-11-09 11:50 Dan Carpenter
0 siblings, 0 replies; only message in thread
From: Dan Carpenter @ 2021-11-09 11:50 UTC (permalink / raw)
To: Richard Weinberger, Stefan Schaeckeler; +Cc: linux-mtd, kernel-janitors
The snprintf() function returns the number of bytes (not including the
NUL terminator) which would have been printed if there were enough
space. So it can be greater than UBIFS_DFS_DIR_LEN. And actually if
it equals UBIFS_DFS_DIR_LEN then that's okay so this check is too
strict.
Fixes: 9a620291fc01 ("ubifs: Export filesystem error counters")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
fs/ubifs/sysfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ubifs/sysfs.c b/fs/ubifs/sysfs.c
index 0eb3d7d12450..7acc5a74e5fa 100644
--- a/fs/ubifs/sysfs.c
+++ b/fs/ubifs/sysfs.c
@@ -100,7 +100,7 @@ int ubifs_sysfs_register(struct ubifs_info *c)
n = snprintf(dfs_dir_name, UBIFS_DFS_DIR_LEN + 1, UBIFS_DFS_DIR_NAME,
c->vi.ubi_num, c->vi.vol_id);
- if (n == UBIFS_DFS_DIR_LEN) {
+ if (n > UBIFS_DFS_DIR_LEN) {
/* The array size is too small */
ret = -EINVAL;
goto out_free;
--
2.20.1
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