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authorDan Carpenter <dan.carpenter@oracle.com>2021-05-11 10:12:00 +0300
committerRichard Weinberger <richard@nod.at>2021-06-18 23:04:47 +0300
commitbe076fdf8369f3b4842362c64cd681f3d498f3dd (patch)
tree04fc8d1e381f1720a2fd025a87b79bdcc4f8a24a /drivers/mtd/ubi
parenta2c2a622d41168f9fea2aa3f76b9fbaa88531aac (diff)
downloadlinux-be076fdf8369f3b4842362c64cd681f3d498f3dd.tar.xz
ubifs: fix snprintf() checking
The snprintf() function returns the number of characters (not counting the NUL terminator) that it would have printed if we had space. This buffer has UBIFS_DFS_DIR_LEN characters plus one extra for the terminator. Printing UBIFS_DFS_DIR_LEN is okay but anything higher will result in truncation. Thus the comparison needs to be change from == to >. These strings are compile time constants so this patch doesn't affect runtime. Fixes: ae380ce04731 ("UBIFS: lessen the size of debugging info data structure") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Alexander Dahl <ada@thorsis.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'drivers/mtd/ubi')
-rw-r--r--drivers/mtd/ubi/debug.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index ac2bdba8bb1a..3c0c8eca4d51 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -511,7 +511,7 @@ int ubi_debugfs_init_dev(struct ubi_device *ubi)
n = snprintf(d->dfs_dir_name, UBI_DFS_DIR_LEN + 1, UBI_DFS_DIR_NAME,
ubi->ubi_num);
- if (n == UBI_DFS_DIR_LEN) {
+ if (n > UBI_DFS_DIR_LEN) {
/* The array size is too small */
return -EINVAL;
}