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Date: Fri, 31 Dec 2021 15:42:17 +0800 From: zhanchengbin <zhanchengbin1@...wei.com> To: Theodore Ts'o <tytso@....edu> CC: <linux-ext4@...r.kernel.org>, <liuzhiqiang26@...wei.com>, <linfeilong@...wei.com>, <wubo40@...wei.com> Subject: [PATCH v2 3/6] lib/support: check whether inump is null before, accessing it in quota_set_sb_inum() 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 <zhanchengbin1@...wei.com> --- 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
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