| Age | Commit message (Collapse) | Author |
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Clang warns (or errors with CONFIG_WERROR=y / W=e):
fs/ntfs/runlist.c:755:6: error: variable 'rl' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
755 | if (overflows_type(lowest_vcn, vcn)) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
...
fs/ntfs/runlist.c:971:9: note: uninitialized use occurs here
971 | kvfree(rl);
| ^~
...
rl has not been allocated at this point so the 'goto err_out' should
really just be a return of the error pointer -EIO.
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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NTFS could store a filename as paired WIN32 and DOS $FILE_NAME attributes
for directories. But ntfs_delete() deleted both attributes for unlinking
a directory, but it also called drop_nlink() for each attributes.
This could trigger warnings when unlinking directories.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The Smatch reported a warning in __ntfs_bitmap_set_bits_in_run():
"warn: passing a valid pointer to 'PTR_ERR'"
This occurs because the 'folio' variable might contain a valid pointer
when jumping to the 'rollback' label, specifically when 'cnt <= 0' is
detected during the subsequent page mapping loop. In such cases,
calling PTR_ERR(folio) is incorrect as it does not contain an error
code.
Fix this by introducing an explicit 'err' variable to track the error
status. This ensures that the rollback logic and the return value
consistently use a proper error code regardless of the state of the
folio pointer.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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When ntfs_attr_get_search_ctx() fails and returns NULL, the function
returned early without calling put_page(ipage).
Fix this by jumping to err_out label on error. The err_out path now
properly releases the page and the mutex, with a NULL check for
the search context.
Reported-by: DaeMyung Kang <charsyam@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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In ntfs_mapping_pairs_decompress(), lowest_vcn is read from
on-disk metadata and used as the initial vcn without validation.
A malformed value can introduce an invalid (e.g. negative) vcn,
corrupting the runlist from the start.
Additionally, the accumulation
vcn += deltaxcn
does not check for s64 overflow. A crafted mapping pairs array
can wrap vcn to a negative value, breaking the monotonically-
increasing invariant relied upon by ntfs_rl_vcn_to_lcn() and
related helpers.
Fix this by validating lowest_vcn and using check_add_overflow()
for vcn accumulation.
Signed-off-by: Zhan Xusheng <zhanxusheng@xiaomi.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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ntfs_reparse_set_wsl_symlink() converts the symlink target into an
allocated NLS string and transfers ownership to ni->target only after
ntfs_set_ntfs_reparse_data() succeeds. If setting the reparse data fails,
the converted target is left unreferenced and leaks.
Free the converted target on the reparse update failure path. Use kfree()
for the other local failure path as well, matching the ntfs_ucstonls()
allocation contract.
Fixes: fc053f05ca28 ("ntfs: add reparse and ea operations")
Signed-off-by: DaeMyung Kang <charsyam@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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ntfs_index_walk_down() allocates ictx->ib when descending from the root
into an index allocation block. If that allocation fails, the old code
still passes the NULL buffer to ntfs_ib_read(), which can write through
it via ntfs_inode_attr_pread().
Allocate the index block into a temporary pointer and return -ENOMEM
before changing the index context on allocation failure. Also propagate
ERR_PTR() through ntfs_index_next() and ntfs_readdir() so walk-down
allocation or index block read failures are not mistaken for normal
index iteration inside the filesystem.
ntfs_readdir() keeps the existing userspace-visible behavior of
suppressing readdir errors after marking end_in_iterate; this change only
prevents the walk-down failure path from dereferencing NULL internally.
The failure was reproduced with failslab fail-nth injection on getdents64;
the original module hits a NULL pointer dereference in memcpy_orig through
ntfs_ib_read(), while the patched module reaches the same
ntfs_index_walk_down() allocation failure without crashing.
Fixes: 0a8ac0c1fa0b ("ntfs: update directory operations")
Signed-off-by: DaeMyung Kang <charsyam@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The current kmemdup() based allocation for IOMAP_INLINE can result in
inline_data pointer having a non-zero page offset. This causes
iomap_inline_data_valid() to fail the check:
iomap->length <= PAGE_SIZE - offset_in_page(iomap->inline_data)
and triggers the kernel BUG at fs/iomap/buffered-io.c:1061.
This particularly affects workloads with frequent small file access
(e.g. Firefox Nightly profile on NTFS with bind mount) when using the
new ntfs. This fix this by allocating a full page with alloc_page() so that
page_address() always returns a page-aligned address.
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Linus pointed out that checking only VMA_WRITE_BIT is incorrect.
Private writable mappings (MAP_PRIVATE) set VM_WRITE but do not
write back to the filesystem. Also, mappings that can become
writable via mprotect() (VM_MAYWRITE) must be handled.
Use vma_desc_test_all(VMA_SHARED_BIT, VMA_MAYWRITE_BIT) instead,
which matches what other filesystems do.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Smatch warned that the bitwise negation in ntfs_write_cb() might lead to
unintended truncation. Casting the block size to loff_t before bitwise
negation prevents the upper 32 bits of pos from being incorrectly zeroed
out during the calculation of new_vcn.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Smatch reported that ctx_needs_reset could be used uninitialized if
ntfs_map_runlist_nolock() fails early when a search context is provided.
Specifically, if the function returns -EIO because the attribute is
resident, the code jumps to err_out. This initializes ctx_needs_reset to
false to satisfy the static checker.
Reported-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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We know "ret2" is zero so there is no need to check. Delete the
if statement.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Return -ENOMEM if the kmalloc() fails. Don't return success.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Smatch reported uninitialized symbol warnings in ntfs_ea_set_wsl_inode()
and __ntfs_create(). In ntfs_ea_set_wsl_inode(), the err variable could be
returned without initialization if no flags are set and rdev is zero.
Additionally, ea_size might remain uninitialized from the caller's
perspective if no EA operations are performed. While these cases might not
be triggered under current logic, we initialize them to zero to satisfy
the static checker.
Reported-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Smatch reported that the variable rl could be used uninitialized in
ntfs_write_mft_block(). After analyzing the code,
when vol->cluster_size == NTFS_BLOCK_SIZE (512), it is smaller than
folio_size, so rl is guaranteed to be initialized. If vol->cluster_size
is larger, the condition to access rl becomes false, so a runtime error is
not expected to occur. However, to make the static checker happy,
this patch initializes rl to NULL and adds an explicit check before
its usage.
Reported-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Smatch reported that err could be used uninitialized if the code path
does not enter the first ntfs_zero_range() block.
Reported-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Since commit a2ad63daa88b ("VFS: add FMODE_CAN_ODIRECT file flag"),
noop_direct_io is not required.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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check an attribute size before memory allocation, and reject if the size
is over the maximum size.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The area beyond initialized_size are read as zero values, there is no need
to zero out that region.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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ntfs_read_iomap_begin_non_resident() rounds up MAPPED extents
to the block boundary of initialized_size. This ensures that
any subsequent blocks are treated as IOMAP_UNWRITTEN, but
it also causes the "straddle block" containing initialized_size
to be read from disk. The disk data beyond initialized_size in
this block is stale and must be zeroed to prevent data leakage.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/ntfs
Pull 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
...
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Remove redundant out-of-bounds validations.
Since ntfs_attr_find and ntfs_external_attr_find
now validate the attribute value offsets and
lengths against the bounds of the MFT record block,
performing subsequent bounds checking in caller
functions like ntfs_attr_lookup is no longer necessary.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Add bound validation in ntfs_external_attr_find to
prevent out-of-bounds memory accesses. This ensures
that the attribute record's length, name offset, and
both resident and non-resident value offsets strictly
fall within the safe boundaries of the MFT record.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Add bound validations in ntfs_attr_find to ensure
attribute value offsets and lengths are safe to
access. It verifies that resident attributes meet
type-specific minimum length requirements and
check the mapping_pairs_offset boundaries for
non-resident attributes.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Detected by Smatch.
inode.c:1796 load_attribute_list_mount() warn:
ignoring unreachable code.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Detected by Smatch.
ndex.c:2041 ntfs_index_walk_up() warn:
inconsistent indenting
mft.c:2462 ntfs_mft_record_alloc() warn:
inconsistent indenting
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Detected by Smatch.
lcnalloc.c:736 ntfs_cluster_alloc() error:
we previously assumed 'rl' could be null (see line 719)
inode.c:3275 ntfs_inode_close() warn:
variable dereferenced before check 'tmp_nis' (see line 3255)
attrib.c:4952 ntfs_attr_remove() warn:
variable dereferenced before check 'ni' (see line 4951)
dir.c:1035 ntfs_readdir() error:
we previously assumed 'private' could be null (see line 850)
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Use IS_ERR_OR_NULL() instead of manual NULL and IS_ERR() checks.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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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>
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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>
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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>
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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>
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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>
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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>
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Use uintptr_t for both conversion paths to fix the warnings.
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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This improves log accuracy for NTFS debugging and removes unnecessary
reliance on the VFS i_ino field ahead of the core VFS type change.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Changes the type of ntfs_inode::mft_no from unsigned long to u64
to safely handle the full 48-bit range without truncation risk, especially
in preparation for broader VFS inode number type (i_ino:u64) and to
improve consistency with ntfs driver practices.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Add 'select FS_IOMAP' to the NTFS_FS Kconfig option so that CONFIG_NTFS_FS
automatically enables CONFIG_FS_IOMAP when built.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Add missing MODUE_ALIAS record to the ntfs driver to allow automatic
loading of the module.
Signed-off-by: Woody Suwalski <terraluna977@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The use of two large arrays in this function makes the stack frame exceed
the warning limit in some configurations, especially with KASAN enabled.
When CONFIG_PAGE_SIZE is set to 65536, each of the arrays contains 128
pointers, so the combined size is 2KB:
fs/ntfs/mft.c: In function 'ntfs_write_mft_block.isra':
fs/ntfs/mft.c:2891:1: error: the frame size of 2640 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]
Use dynamic allocation of these arrays to avoid getting into dangerously
high stack usage.
Unfortunately, allocating memory in the writepages() code path can be
problematic in case of low memory situations, so it would be better to
rework the code more widely to avoid the allocation entirely.
Fixes: 115380f9a2f9 ("ntfs: update mft operations")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The presence of a sentinel (an empty {}) at the end of the ctl_table array
now causes a "sysctl table check failed" error because the kernel attempts
to validate the null entry as a functional node.
Deleted the empty {} from the ntfs_sysctls array to prevent
the "procname is null" and "No proc_handler" errors and updated the base
path from "fs" to "fs/ntfs" to ensure the ntfs-debug node is correctly
located under /proc/sys/fs/ntfs/.
Reported-by: Woody Suwalski <terraluna977@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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There is a spelling mistake in an ntfs_debug message. Fix it.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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In the error path for ntfs_attr_map_whole_runlist() the lock is not
released.
Add release for lock.
Detected by Smatch:
fs/ntfs/attrib.c:5197 ntfs_non_resident_attr_collapse_range() warn:
inconsistent returns '&ni->runlist.lock'.
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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If ntfs_attr_iget() fails no error code is assigned to be returned.
Detected by Smatch:
fs/ntfs/attrib.c:2665 ntfs_attr_add() warn:
missing error code 'err'
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The variable ni has the possiblity of being null and is checked for it
but, only after it was dereferenced in a log message.
Put check before dereference.
Detected by Smatch:
fs/ntfs/attrib.c:2115 ntfs_resident_attr_record_add() warn:
variable dereferenced before check 'ni' (see line 2111)
fs/ntfs/attrib.c:2237 ntfs_non_resident_attr_record_add() warn:
variable dereferenced before check 'ni' (see line 2232)
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The variable name_len is checked to see if it's larger than the macro
NTFS_MAX_NAME_LEN however this condition is impossible because name_len
is of type u8 and NTFS_MAX_NAME_LEN is hardcoded to be 255.
Detected by Smatch:
fs/ntfs/namei.c:1175 __ntfs_link() warn:
impossible condition '(name_len > 255) => (0-255 > 255)'
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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The variable err is confirmed to be 0 and then never reassigned in the
success path. The function then returns with ERR_PTR(err) which just
equals NULL and can be misleading.
Detected by Smatch:
fs/ntfs/namei.c:1091 ntfs_mkdir() warn:
passing zero to 'ERR_PTR'
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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Remove unnecessary semicolons reported by Coccinelle/coccicheck and the
semantic patch at scripts/coccinelle/misc/semicolon.cocci.
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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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>
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Introduce Kconfig and Makefile for remade ntfs.
And this patch make ntfs and ntfs3 mutually exclusive so only one can be
built-in(y), while both can still be built as modules(m).
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
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