linux.git/fs/ntfs/ea.c, branch master Linux kernel source tree ntfs: harden ntfs_listxattr against EA entries 2026-03-16T11:27:40+00:00 Hyunchul Lee hyc.lee@gmail.com 2026-03-09T07:40:09+00:00 e6a95c5a8066b4d6a74651f89612f13ed1a03fe6 Validate every EA entry only if the buffer length is required to prevent large memory allocation. Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
Validate every EA entry only if the buffer length is required to prevent
large memory allocation.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
ntfs: harden ntfs_ea_lookup against malformed EA entries 2026-03-16T11:27:38+00:00 Hyunchul Lee hyc.lee@gmail.com 2026-03-09T07:06:46+00:00 c451d34ae14201c2bb40652bf74072a79ff82f7d Validate p_ea->ea_name_length tightly, and the used entry size for every EA. Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
Validate p_ea->ea_name_length tightly, and the used entry size
for every EA.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
ntfs: check $EA query-length in ntfs_ea_get 2026-03-16T11:27:36+00:00 Hyunchul Lee hyc.lee@gmail.com 2026-03-09T07:06:06+00:00 10993e525b1ee81cbe02a8ca7d0005712f6b3d82 if ea_info_qlen exceeds all_ea_size, OOB can happen. Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
if ea_info_qlen exceeds all_ea_size, OOB can happen.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
ntfs: validate WSL EA payload sizes 2026-03-16T11:27:34+00:00 Hyunchul Lee hyc.lee@gmail.com 2026-03-09T04:06:51+00:00 a5325419e9fb086f79334723a54481336dc9d561 Enforce the exact-size reads for $LXUID, $LXGID, $LXMOD, $LXDEV. Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
Enforce the exact-size reads for $LXUID, $LXGID, $LXMOD, $LXDEV.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
ntfs: fix WSL ea restore condition 2026-03-16T11:27:30+00:00 Hyunchul Lee hyc.lee@gmail.com 2026-03-11T23:36:24+00:00 a73258681279bceb4e9210d86204bae14d3ea795 Use NTFS_VOL_GID(not NTFS_VOL_UID) for restoring the gid, and call ntfs_ea_get_wsl_inode() only when $EA_INFORMATION exists. Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
Use NTFS_VOL_GID(not NTFS_VOL_UID) for restoring the gid, and call
ntfs_ea_get_wsl_inode() only when $EA_INFORMATION exists.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
ntfs: add missing newlines to pr_err() messages 2026-03-10T08:52:13+00:00 Woody Suwalski terraluna977@gmail.com 2026-03-10T08:50:57+00:00 ea3566a3fa235cd0325b2bedf91ceec65073004b There is an inconsistent use of pr_err() statements in the current code. Many error messages are missing the \n termination, what results in the messages being printed with a delay, only after a next printk() line is printed. 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 <terraluna977@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
There is an inconsistent use of pr_err() statements in the current code.
Many error messages are missing the \n termination, what results in the
messages being printed with a delay, only after a next printk() line is
printed. 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 <terraluna977@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
ntfs: Fix null pointer dereference 2026-02-26T09:26:00+00:00 Ethan Tidmore ethantidmore06@gmail.com 2026-02-25T22:24:53+00:00 40c31f0563ec10e5b112be35e2e003f8ce4afe98 The variable ctx can be null and once confirmed to be null in its error path goes to label err_out. Once there it can be immediately dereferenced by 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() in error path. Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com> Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
The variable ctx can be null and once confirmed to be null in its error
path goes to label err_out. Once there it can be immediately dereferenced
by 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() in
error path.

Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
ntfs: add reparse and ea operations 2026-02-19T12:50:54+00:00 Namjae Jeon linkinjeon@kernel.org 2026-02-13T01:45:36+00:00 fc053f05ca282a5e760b41f6560ac835c4e28037 Implement support for Extended Attributes and Reparse Points, enabling Posix ACL support and, and compatibility with Windows Subsystem for Linux (WSL) metadata. Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> 
Implement support for Extended Attributes and Reparse Points, enabling
Posix ACL support and, and compatibility with Windows Subsystem for
Linux (WSL) metadata.

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>