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isofs: check the return value of sb_min_blocksize() in isofs_fill_super

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sb_min_blocksize() may return 0. Check its return value to avoid
opt->blocksize and sb->s_blocksize is 0.

Cc: stable@vger.kernel.org # v6.15
Fixes: 1b17a46c92 ("isofs: convert isofs to use the new mount API")
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
Link: https://patch.msgid.link/20251104125009.2111925-4-yangyongpeng.storage@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Yongpeng Yang
2025-11-04 20:50:08 +08:00
committed by Christian Brauner
parent f2c1f63163
commit e106e269c5
1 changed files with 5 additions and 0 deletions
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5
fs/isofs/inode.c
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@@ -610,6 +610,11 @@ static int isofs_fill_super(struct super_block *s, struct fs_context *fc)
goto out_freesbi;
}
opt->blocksize = sb_min_blocksize(s, opt->blocksize);
if (!opt->blocksize) {
printk(KERN_ERR
"ISOFS: unable to set blocksize\n");
goto out_freesbi;
}
sbi->s_high_sierra = 0; /* default is iso9660 */
sbi->s_session = opt->session;