6.12-stable review patch. If anyone has any objections, please let me know.
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From: Baokun Li libaokun1@huawei.com
commit 7c11c56eb32eae96893eebafdbe3decadefe88ad upstream.
Kernel commit 0a6ce20c1564 ("ext4: verify orphan file size is not too big") limits the maximum supported orphan file size to 8 << 20.
However, in e2fsprogs, the orphan file size is set to 32–512 filesystem blocks when creating a filesystem.
With 64k block size, formatting an ext4 fs >32G gives an orphan file bigger than the kernel allows, so mount prints an error and fails:
EXT4-fs (vdb): orphan file too big: 8650752 EXT4-fs (vdb): mount failed
To prevent this issue and allow previously created 64KB filesystems to mount, we updates the maximum allowed orphan file size in the kernel to 512 filesystem blocks.
Fixes: 0a6ce20c1564 ("ext4: verify orphan file size is not too big") Signed-off-by: Baokun Li libaokun1@huawei.com Reviewed-by: Jan Kara jack@suse.cz Message-ID: 20251120134233.2994147-1-libaokun@huaweicloud.com Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ext4/orphan.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/fs/ext4/orphan.c +++ b/fs/ext4/orphan.c @@ -8,6 +8,8 @@ #include "ext4.h" #include "ext4_jbd2.h"
+#define EXT4_MAX_ORPHAN_FILE_BLOCKS 512 + static int ext4_orphan_file_add(handle_t *handle, struct inode *inode) { int i, j, start; @@ -589,7 +591,7 @@ int ext4_init_orphan_info(struct super_b * consuming absurd amounts of memory when pinning blocks of orphan * file in memory. */ - if (inode->i_size > 8 << 20) { + if (inode->i_size > (EXT4_MAX_ORPHAN_FILE_BLOCKS << inode->i_blkbits)) { ext4_msg(sb, KERN_ERR, "orphan file too big: %llu", (unsigned long long)inode->i_size); ret = -EFSCORRUPTED;