diff options
| author | Yongpeng Yang <yangyongpeng@xiaomi.com> | 2025-11-04 20:50:07 +0800 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-11-05 14:00:16 +0100 |
| commit | f2c1f631630e01821fe4c3fdf6077bc7a8284f82 (patch) | |
| tree | 206cc94645ad3d83fb23cb12cc94084c21bcf862 /fs/exfat | |
| parent | 63b5aa01da0f38cdbd97d021477258e511631497 (diff) | |
exfat: check return value of sb_min_blocksize in exfat_read_boot_sector
sb_min_blocksize() may return 0. Check its return value to avoid
accessing the filesystem super block when sb->s_blocksize is 0.
Cc: stable@vger.kernel.org # v6.15
Fixes: 719c1e1829166d ("exfat: add super block operations")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
Link: https://patch.msgid.link/20251104125009.2111925-3-yangyongpeng.storage@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/exfat')
| -rw-r--r-- | fs/exfat/super.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/exfat/super.c b/fs/exfat/super.c index 7f9592856bf7..74d451f732c7 100644 --- a/fs/exfat/super.c +++ b/fs/exfat/super.c @@ -433,7 +433,10 @@ static int exfat_read_boot_sector(struct super_block *sb) struct exfat_sb_info *sbi = EXFAT_SB(sb); /* set block size to read super block */ - sb_min_blocksize(sb, 512); + if (!sb_min_blocksize(sb, 512)) { + exfat_err(sb, "unable to set blocksize"); + return -EINVAL; + } /* read boot sector */ sbi->boot_bh = sb_bread(sb, 0); |