kernel/git/stable/linux.git/fs/udf/super.c, branch linux-7.2.y

Merge tag 'fs_for_v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2026-06-16T06:28:52+00:00

Pull udf, isofs, ext2, and quota updates from Jan Kara: - Assorted udf & isofs fixes for maliciously formatted devices - Cleanups to use kmalloc() instead of __get_free_page() - Removal of deprecated DAX code from ext2 * tag 'fs_for_v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: validate VAT inode size for old VAT format udf: validate VAT header length against the VAT inode size udf: validate sparing table length as an entry count, not a byte count isofs: bound Rock Ridge symlink components to the SL record ext2: fix ignored return value of generic_write_sync() ext2: Remove deprecated DAX support isofs: replace __get_free_page() with kmalloc() quota: allocate dquot_hash with kmalloc() udf: validate free block extents against the partition length

Merge tag 'pull-fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/viro/vfs

2026-06-15T10:23:57+00:00

Pull udf fix from Al Viro: "I just noticed that a udf fix had been sitting in #fixes since February; still applicable, Jan's Acked-by applied. Very belated pull request" * tag 'pull-fixes' of gitolite.kernel.org:pub/scm/linux/kernel/git/viro/vfs: udf: fix nls leak on udf_fill_super() failure

udf: fix nls leak on udf_fill_super() failure

2026-06-15T02:29:21+00:00

On all failure exits that go to error_out there we have already moved the nls reference from uopt->nls_map to sbi->s_nls_map, leaving NULL behind. Fixes: c4e89cc674ac ("udf: convert to new mount API") Acked-by: Jan Kara Signed-off-by: Al Viro

udf: validate VAT inode size for old VAT format

2026-06-12T11:52:47+00:00

Validate VAT inode is large enough to contain at least the header for pre-2.00 UDF media format. Signed-off-by: Jan Kara

udf: validate VAT header length against the VAT inode size

2026-06-12T11:52:46+00:00

udf_load_vat() takes the virtual partition's start offset straight from the on-disk VAT 2.0 header without checking it against the VAT inode size: map->s_type_specific.s_virtual.s_start_offset = le16_to_cpu(vat20->lengthHeader); map->s_type_specific.s_virtual.s_num_entries = (sbi->s_vat_inode->i_size - map->s_type_specific.s_virtual.s_start_offset) >> 2; lengthHeader is a fully attacker-controlled 16-bit value. If it exceeds the VAT inode size, the s_num_entries subtraction underflows to a huge count, which defeats the "block > s_num_entries" bound in udf_get_pblock_virt15(); and on the ICB-inline path that function reads ((__le32 *)(iinfo->i_data + s_start_offset))[block] so a large s_start_offset indexes past the inode's in-ICB data. Mounting a crafted UDF image with a virtual (VAT) partition then triggers an out-of-bounds read. Reject a VAT whose header length does not leave room for at least one entry within the VAT inode. Fixes: fa5e08156335 ("udf: Handle VAT packed inside inode properly") Cc: stable@vger.kernel.org Signed-off-by: Bryam Vargas Link: https://patch.msgid.link/20260612-b4-disp-9a2317ee-v1-1-fefef5736154@proton.me Signed-off-by: Jan Kara

udf: validate sparing table length as an entry count, not a byte count

2026-06-12T10:49:27+00:00

udf_load_sparable_map() accepts a sparing table when sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > sb->s_blocksize is false, i.e. it treats reallocationTableLen as a number of BYTES that must fit in the block. But the table is walked as an array of 8-byte sparingEntry elements: for (i = 0; i < le16_to_cpu(st->reallocationTableLen); i++) { struct sparingEntry *entry = &st->mapEntry[i]; ... entry->origLocation ... } in udf_get_pblock_spar15() and udf_relocate_blocks(). A reallocationTableLen of N therefore passes the check whenever sizeof(*st) + N <= blocksize, yet the consumers index sizeof(*st) + N * sizeof(struct sparingEntry) bytes -- up to ~8x the block. On a crafted UDF image this is an out-of-bounds read in udf_get_pblock_spar15(); udf_relocate_blocks() additionally feeds the same length to udf_update_tag(), whose crc_itu_t() reads far past the block, and its memmove() through st->mapEntry[] is an out-of-bounds write. Validate reallocationTableLen as the entry count it is, with struct_size(). Fixes: 1df2ae31c724 ("udf: Fortify loading of sparing table") Cc: stable@vger.kernel.org Signed-off-by: Bryam Vargas Link: https://patch.msgid.link/20260612-b4-disp-91780c4e-v1-1-f15112ff6882@proton.me Signed-off-by: Jan Kara

Merge tag 'fs_for_v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2026-04-16T02:22:16+00:00

Pull ext2, udf, quota updates from Jan Kara: - A fix for a race in quota code that can expose ocfs2 to use-after-free issues - UDF fix to avoid memory corruption in face of corrupted format - Couple of ext2 fixes for better handling of fs corruption - Some more various code cleanups in UDF & ext2 * tag 'fs_for_v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: ext2: reject inodes with zero i_nlink and valid mode in ext2_iget() ext2: use get_random_u32() where appropriate quota: Fix race of dquot_scan_active() with quota deactivation udf: fix partition descriptor append bookkeeping ext2: avoid drop_nlink() during unlink of zero-nlink inode in ext2_unlink() ext2: guard reservation window dump with EXT2FS_DEBUG ext2: replace BUG_ON with WARN_ON_ONCE in ext2_get_blocks ext2: remove stale TODO about kmap fs: udf: avoid assignment in condition when selecting allocation goal

Merge tag 'vfs-7.1-rc1.bh.metadata' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2026-04-13T19:46:42+00:00

Pull vfs buffer_head updates from Christian Brauner: "This cleans up the mess that has accumulated over the years in metadata buffer_head tracking for inodes. It moves the tracking into dedicated structure in filesystem-private part of the inode (so that we don't use private_list, private_data, and private_lock in struct address_space), and also moves couple other users of private_data and private_list so these are removed from struct address_space saving 3 longs in struct inode for 99% of inodes" * tag 'vfs-7.1-rc1.bh.metadata' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (42 commits) fs: Drop i_private_list from address_space fs: Drop mapping_metadata_bhs from address space ext4: Track metadata bhs in fs-private inode part minix: Track metadata bhs in fs-private inode part udf: Track metadata bhs in fs-private inode part fat: Track metadata bhs in fs-private inode part bfs: Track metadata bhs in fs-private inode part affs: Track metadata bhs in fs-private inode part ext2: Track metadata bhs in fs-private inode part fs: Provide functions for handling mapping_metadata_bhs directly fs: Switch inode_has_buffers() to take mapping_metadata_bhs fs: Make bhs point to mapping_metadata_bhs fs: Move metadata bhs tracking to a separate struct fs: Fold fsync_buffers_list() into sync_mapping_buffers() fs: Drop osync_buffers_list() kvm: Use private inode list instead of i_private_list fs: Remove i_private_data aio: Stop using i_private_data and i_private_lock hugetlbfs: Stop using i_private_data fs: Stop using i_private_data for metadata bh tracking ...

udf: Track metadata bhs in fs-private inode part

2026-03-26T14:03:32+00:00

Track metadata bhs for an inode in fs-private part of the inode. Signed-off-by: Jan Kara Link: https://patch.msgid.link/20260326095354.16340-80-jack@suse.cz Signed-off-by: Christian Brauner

udf: fix partition descriptor append bookkeeping

2026-03-19T13:44:07+00:00

Mounting a crafted UDF image with repeated partition descriptors can trigger a heap out-of-bounds write in part_descs_loc[]. handle_partition_descriptor() deduplicates entries by partition number, but appended slots never record partnum. As a result duplicate Partition Descriptors are appended repeatedly and num_part_descs keeps growing. Once the table is full, the growth path still sizes the allocation from partnum even though inserts are indexed by num_part_descs. If partnum is already aligned to PART_DESC_ALLOC_STEP, ALIGN(partnum, step) can keep the old capacity and the next append writes past the end of the table. Store partnum in the appended slot and size growth from the next append count so deduplication and capacity tracking follow the same model. Fixes: ee4af50ca94f ("udf: Fix mounting of Win7 created UDF filesystems") Cc: stable@vger.kernel.org Signed-off-by: Seohyeon Maeng Link: https://patch.msgid.link/20260310081652.21220-1-bioloidgp@gmail.com Signed-off-by: Jan Kara