[PATCH v2 3/6] lib/support: check whether inump is null before, accessing it in quota_set_sb_inum()
From: zhanchengbin <hidden>
Date: 2021-12-31 07:42:20
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
In quota_set_sb_inum(), we should check whether inump is null before accessing it, otherwise the null potinter dereference error may occur. Signed-off-by: zhanchengbin <redacted> --- lib/support/mkquota.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/support/mkquota.c b/lib/support/mkquota.c
index 6f4a0b90..482e3d91 100644
--- a/lib/support/mkquota.c
+++ b/lib/support/mkquota.c@@ -99,7 +99,8 @@ void quota_set_sb_inum(ext2_filsys fs, ext2_ino_t ino, enum quota_type qtype)
log_debug("setting quota ino in superblock: ino=%u, type=%d", ino,
qtype);
- *inump = ino;
+ if (inump != NULL)
+ *inump = ino;
ext2fs_mark_super_dirty(fs);
}
--
2.27.0