Changes in ea.c

ff9726d7a0068e6c2ae1969415285d12ef4d5c6f - Merge tag 'ntfs-for-7.1-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs

Fri, 24 Apr 2026 22:40:25 +0200

Merge tag 'ntfs-for-7.1-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfsPull ntfs updates from Namjae Jeon: - Fix potential data leakage by zeroing the portion of the straddle block beyond initialized_size when reading non-resident attributes - Remove unnecessary zeroing in ntfs_punch_hole() for ranges beyond initialized_size, as they are already returned as zeros on read - Fix writable check in ntfs_file_mmap_prepare() to correctly handle shared mappings using VMA_SHARED_BIT | VMA_MAYWRITE_BIT - Use page allocation instead of kmemdup() for IOMAP_INLINE data to ensure page-aligned address and avoid BUG trap in iomap_inline_data_valid() caused by the page boundary check - Add a size check before memory allocation in ntfs_attr_readall() and reject overly large attributes - Remove unneeded noop_direct_IO from ntfs_aops as it is no longer required following the FMODE_CAN_ODIRECT flag - Fix seven static analysis warnings reported by Smatch* tag 'ntfs-for-7.1-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs: ntfs: use page allocation for resident attribute inline data ntfs: fix mmap_prepare writable check for shared mappings ntfs: fix potential 32-bit truncation in ntfs_write_cb() ntfs: fix uninitialized variable in ntfs_map_runlist_nolock ntfs: delete dead code ntfs: add missing error code in ntfs_mft_record_alloc() ntfs: fix uninitialized variables in ntfs_ea_set_wsl_inode() ntfs: fix uninitialized pointer in ntfs_write_mft_block ntfs: fix uninitialized variable in ntfs_write_simple_iomap_begin_non_resident ntfs: remove noop_direct_IO from address_space_operations ntfs: limit memory allocation in ntfs_attr_readall ntfs: not zero out range beyond init in punch_hole ntfs: zero out stale data in straddle block beyond initialized_size List of files: /linux/fs/ntfs/ea.c

cd8d29c1b3c3397493115a9e919a806ea28aef05 - ntfs: fix uninitialized variables in ntfs_ea_set_wsl_inode()

Fri, 10 Apr 2026 17:02:49 +0200

ntfs: fix uninitialized variables in ntfs_ea_set_wsl_inode()Smatch reported uninitialized symbol warnings in ntfs_ea_set_wsl_inode()and __ntfs_create(). In ntfs_ea_set_wsl_inode(), the err variable could bereturned without initialization if no flags are set and rdev is zero.Additionally, ea_size might remain uninitialized from the caller'sperspective if no EA operations are performed. While these cases might notbe triggered under current logic, we initialize them to zero to satisfythe static checker.Reported-by: Dan Carpenter Reviewed-by: Hyunchul Lee Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

cdd4dc3aebeab43a72ce0bc2b5bab6f0a80b97a5 - Merge tag 'ntfs-for-7.1-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs

Sat, 18 Apr 2026 01:35:49 +0200

Merge tag 'ntfs-for-7.1-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfsPull ntfs resurrection from Namjae Jeon: "Ever since Kari Argillander’s 2022 report [1] regarding the state of the ntfs3 driver, I have spent the last 4 years working to provide full write support and current trends (iomap, no buffer head, folio), enhanced performance, stable maintenance, utility support including fsck for NTFS in Linux. This new implementation is built upon the clean foundation of the original read-only NTFS driver, adding: - Write support: Implemented full write support based on the classic read-only NTFS driver. Added delayed allocation to improve write performance through multi-cluster allocation and reduced fragmentation of the cluster bitmap. - iomap conversion: Switched buffered IO (reads/writes), direct IO, file extent mapping, readpages, and writepages to use iomap. - Remove buffer_head: Completely removed buffer_head usage by converting to folios. As a result, the dependency on CONFIG_BUFFER_HEAD has been removed from Kconfig. - Stability improvements: The new ntfs driver passes 326 xfstests, compared to 273 for ntfs3. All tests passed by ntfs3 are a complete subset of the tests passed by this implementation. Added support for fallocate, idmapped mounts, permissions, and more. xfstests Results report: Total tests run: 787 Passed : 326 Failed : 38 Skipped : 423 Failed tests breakdown: - 34 tests require metadata journaling - 4 other tests: 094: No unwritten extent concept in NTFS on-disk format 563: cgroup v2 aware writeback accounting not supported 631: RENAME_WHITEOUT support required 787: NFS delegation test"Link: https://lore.kernel.org/all/da20d32b-5185-f40b-48b8-2986922d8b25@stargateuniverse.net/ [1][ Let's see if this undead filesystem ends up being of the "Easter miracle" kind, or the "Nosferatu of filesystems" kind... ]* tag 'ntfs-for-7.1-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs: (46 commits) ntfs: remove redundant out-of-bound checks ntfs: add bound checking to ntfs_external_attr_find ntfs: add bound checking to ntfs_attr_find ntfs: fix ignoring unreachable code warnings ntfs: fix inconsistent indenting warnings ntfs: fix variable dereferenced before check warnings ntfs: prefer IS_ERR_OR_NULL() over manual NULL check ntfs: harden ntfs_listxattr against EA entries ntfs: harden ntfs_ea_lookup against malformed EA entries ntfs: check $EA query-length in ntfs_ea_get ntfs: validate WSL EA payload sizes ntfs: fix WSL ea restore condition ntfs: add missing newlines to pr_err() messages ntfs: fix pointer/integer casting warnings ntfs: use ->mft_no instead of ->i_ino in prints ntfs: change mft_no type to u64 ntfs: select FS_IOMAP in Kconfig ntfs: add MODULE_ALIAS_FS ntfs: reduce stack usage in ntfs_write_mft_block() ntfs: fix sysctl table registration and path ... List of files: /linux/fs/ntfs/ea.c

e6a95c5a8066b4d6a74651f89612f13ed1a03fe6 - ntfs: harden ntfs_listxattr against EA entries

Mon, 09 Mar 2026 08:40:09 +0100

ntfs: harden ntfs_listxattr against EA entriesValidate every EA entry only if the buffer length is required to preventlarge memory allocation.Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

c451d34ae14201c2bb40652bf74072a79ff82f7d - ntfs: harden ntfs_ea_lookup against malformed EA entries

Mon, 09 Mar 2026 08:06:46 +0100

ntfs: harden ntfs_ea_lookup against malformed EA entriesValidate p_ea->ea_name_length tightly, and the used entry sizefor every EA.Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

10993e525b1ee81cbe02a8ca7d0005712f6b3d82 - ntfs: check $EA query-length in ntfs_ea_get

Mon, 09 Mar 2026 08:06:06 +0100

ntfs: check $EA query-length in ntfs_ea_getif ea_info_qlen exceeds all_ea_size, OOB can happen.Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

a5325419e9fb086f79334723a54481336dc9d561 - ntfs: validate WSL EA payload sizes

Mon, 09 Mar 2026 05:06:51 +0100

ntfs: validate WSL EA payload sizesEnforce the exact-size reads for $LXUID, $LXGID, $LXMOD, $LXDEV.Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

a73258681279bceb4e9210d86204bae14d3ea795 - ntfs: fix WSL ea restore condition

Thu, 12 Mar 2026 00:36:24 +0100

ntfs: fix WSL ea restore conditionUse NTFS_VOL_GID(not NTFS_VOL_UID) for restoring the gid, and callntfs_ea_get_wsl_inode() only when $EA_INFORMATION exists.Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

ea3566a3fa235cd0325b2bedf91ceec65073004b - ntfs: add missing newlines to pr_err() messages

Tue, 10 Mar 2026 09:50:57 +0100

ntfs: add missing newlines to pr_err() messagesThere is an inconsistent use of pr_err() statements in the current code.Many error messages are missing the \n termination, what results in themessages being printed with a delay, only after a next printk() line isprinted. It prevents relying on printk() to monitor the driver errors.This patch is modifying only text messages, no functional change.Signed-off-by: Woody Suwalski Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

40c31f0563ec10e5b112be35e2e003f8ce4afe98 - ntfs: Fix null pointer dereference

Wed, 25 Feb 2026 23:24:53 +0100

ntfs: Fix null pointer dereferenceThe variable ctx can be null and once confirmed to be null in its errorpath goes to label err_out. Once there it can be immediately dereferencedby the function ntfs_attr_put_search_ctx() which has no null pointer check.Detected by Smatch:fs/ntfs/ea.c:687 ntfs_new_attr_flags() error:we previously assumed 'ctx' could be null (see line 577)Add null pointer check before running ntfs_attr_put_search_ctx() inerror path.Signed-off-by: Ethan Tidmore Reviewed-by: Hyunchul Lee Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c

fc053f05ca282a5e760b41f6560ac835c4e28037 - ntfs: add reparse and ea operations

Fri, 13 Feb 2026 02:45:36 +0100

ntfs: add reparse and ea operationsImplement support for Extended Attributes and Reparse Points, enablingPosix ACL support and, and compatibility with Windows Subsystem forLinux (WSL) metadata.Acked-by: Christoph Hellwig Signed-off-by: Namjae Jeon List of files: /linux/fs/ntfs/ea.c