6.17-stable review patch. If anyone has any objections, please let me know.
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From: Yongpeng Yang yangyongpeng@xiaomi.com
commit 124af0868ec6929ba838fb76d25f00c06ba8fc0d upstream.
sb_min_blocksize() may return 0. Check its return value to avoid the filesystem super block when sb->s_blocksize is 0.
Cc: stable@vger.kernel.org # v6.15 Fixes: a64e5a596067bd ("bdev: add back PAGE_SIZE block size validation for sb_set_blocksize()") Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Yongpeng Yang yangyongpeng@xiaomi.com Link: https://patch.msgid.link/20251104125009.2111925-5-yangyongpeng.storage@gmail... Reviewed-by: Darrick J. Wong djwong@kernel.org Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/xfs/xfs_super.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1710,7 +1710,10 @@ xfs_fs_fill_super( if (error) return error;
- sb_min_blocksize(sb, BBSIZE); + if (!sb_min_blocksize(sb, BBSIZE)) { + xfs_err(mp, "unable to set blocksize"); + return -EINVAL; + } sb->s_xattr = xfs_xattr_handlers; sb->s_export_op = &xfs_export_operations; #ifdef CONFIG_XFS_QUOTA