usb: gadget: r8a66597: avoid double free of ep0_req in probe error path
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: r8a66597: avoid double free of ep0_req in probe error path
If usb_add_gadget_udc() fails, r8a66597_probe() jumps to err_add_udc
and frees ep0_req, then falls through to clean_up2 where ep0_req is
freed again when it is non-NULL.
Remove the redundant free from err_add_udc and keep the cleanup in
clean_up2 so the request is released exactly once.
Issue found using a prototype static analysis tool
and confirmed by code review.
udf: Mark LVID buffer as uptodate before marking it dirty
In the Linux kernel, the following vulnerability has been resolved:
udf: Mark LVID buffer as uptodate before marking it dirty
When an I/O error occurs while writing the Logical Volume Integrity
Descriptor (LVID) buffer to the block device, the block layer's completion
handler (`end_buffer_write_sync()`) clears the `BH_Uptodate` flag on the
buffer. However, the buffer still contains valid LVID data in memory. If
the filesystem is subsequently remounted read-write or synced,
`udf_open_lvid()` or `udf_sync_fs()` will modify the LVID buffer and call
`mark_buffer_dirty()`. This triggers a spurious
`WARN_ON_ONCE(!buffer_uptodate(bh))` warning in
usb: fix UAF when probe runs concurrent to dyn ID removal
In the Linux kernel, the following vulnerability has been resolved:
usb: fix UAF when probe runs concurrent to dyn ID removal
Dynamic IDs are only guaranteed to be valid when usb_dynids_lock is held,
as remove_id_store can free the node. Thus, make a copy in
usb_probe_interface. Clarify the documentation that the id parameter is
only valid during the probe.
USB serial has the same pattern, but it does not need fixing as the IDs
cannot be removed via sysfs.
RDMA/ipoib: Drain RCU callbacks during module teardown
In the Linux kernel, the following vulnerability has been resolved:
RDMA/ipoib: Drain RCU callbacks during module teardown
IPoIB reclamation completions can be signaled from inside an RCU callback.
Teardown can wake before the callback returns and unload ib_ipoib while its
code is still executing.
Client registration failure can also remove already-added devices and queue
callbacks. Wait after client and workqueue teardown.
hfsplus: validate thread record before delete key rebuild
In the Linux kernel, the following vulnerability has been resolved:
hfsplus: validate thread record before delete key rebuild
hfsplus_delete_cat() is called with str == NULL when the last open
reference to an unlinked HFS+ hardlink backing inode is closed. In that
case, the function finds the catalog thread by CNID and rebuilds the
catalog key from thread.nodeName.
That reconstruction path reads thread.nodeName.length directly from the
catalog B-tree into fd.search_key and then copies length * 2 bytes into
fd.search_key->cat.name.unicode. It does not first check that the found
record is a thread record or that its size matches the thread n
irqchip/renesas-irqc: Fix generic interrupt chip leak on remove
In the Linux kernel, the following vulnerability has been resolved:
irqchip/renesas-irqc: Fix generic interrupt chip leak on remove
The driver allocates domain generic chips probe. However, on driver
removal, the generic chips are not automatically freed when the interrupt
domain is removed because the domain flags do not include
IRQ_DOMAIN_FLAG_DESTROY_GC.
This causes both the domain generic chips structure and the associated
generic chips to be leaked. Additionally, the generic chips remain on the
global list and may later be accessed by generic interrupt chip suspend,
resume, or shutdown callbacks after the driver has been removed,
pote
gpu: host1x: Avoid stack over-read in debug output helpers
In the Linux kernel, the following vulnerability has been resolved:
gpu: host1x: Avoid stack over-read in debug output helpers
host1x_debug_output() and host1x_debug_cont() used vsnprintf(), which
returns the length the formatted string would have reached with an
unbounded buffer. That return value was passed straight to o->fn as
the number of bytes to emit.
This could cause a read past end of the output buffer if a call to
host1x_debug_* produced a string longer than 256 bytes. This only
affected the debugfs files as the printk debug sink ignores the
number of bytes. In practice, this is very unlikely to occur.
Fix by switching to vscnpr
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: f_uac1_legacy: remove broken string configfs attributes
The UAC1_STR_ATTRIBUTE macro defines configfs show/store handlers for
the fn_play, fn_cap, and fn_cntl string options. The store function
contains an inverted null check on the kstrndup() return value.
This means every write attempt returns -ENOMEM on success and
dereferences a NULL pointer on allocation failure. The attributes
have been broken and unused for many years.
Remove the UAC1_STR_ATTRIBUTE macro and the three attributes it
generated. The internal defaults (FILE_PCM_PLAYBACK, FILE_PCM_CAPTURE,
In the Linux kernel, the following vulnerability has been resolved:
UDF symlink pathComponent header OOB read
udf_symlink_filler() can enter udf_pc_to_char() with a partial pathComponent header.
Validate that enough input remains for a complete pathComponent header
before accessing it. Reject malformed symlink data that would otherwise
make udf_pc_to_char() perform an out-of-bounds read.
speakup: keyhelp: guard letter_offsets possible out-of-range indexing
In the Linux kernel, the following vulnerability has been resolved:
speakup: keyhelp: guard letter_offsets possible out-of-range indexing
help_init() builds letter_offsets[] by using the first byte of each
function name as an index via `(start & 31) - 1`. If function_names are
overridden from sysfs (root) with a name starting outside [a–z], the
index underflows or exceeds the array, leading to OOB write.
Function names can be overridden with the following commands as root:
modprobe speakup_soft
echo "0 _bad" > /sys/accessibility/speakup/i18n/function_names
# then press Insert+2 on /dev/tty
This fix checks the first letter in
misc: ad525x_dpot: use driver core groups for sysfs files
In the Linux kernel, the following vulnerability has been resolved:
misc: ad525x_dpot: use driver core groups for sysfs files
ad_dpot_probe() creates per-RDAC sysfs files manually and then
optionally creates the command sysfs group. This leaves probe responsible
for rolling back partial sysfs state and makes remove responsible for
matching every file that probe created.
Move the device attributes into driver core dev_groups for the I2C and
SPI drivers and use an is_visible() callback to expose only the
attributes supported by the probed device. With this shape, the driver
core creates the sysfs files only after probe succeeds and removes t
ipack: ipoctal: fix UAF, null-ptr-deref, and use-after-free in cleanup on remove
In the Linux kernel, the following vulnerability has been resolved:
ipack: ipoctal: fix UAF, null-ptr-deref, and use-after-free in cleanup on remove
Three issues arise when the device is removed while a tty session is
still active:
1. UAF of struct ipoctal: the remove callback frees ipoctal via
kfree() while tty ops may still access it. Fix by introducing
kref-based lifetime management — kref is taken in install() when
a tty is opened and released in cleanup() when the tty is finally
destroyed; remove() uses kref_put() instead of kfree().
2. NULL dereference in ipoctal_write_tty(): __ipoctal_remove()
frees xmit_buf via tty
mtd: part: reject MTDPART_OFS_RETAIN in mtd_add_partition()
In the Linux kernel, the following vulnerability has been resolved:
mtd: part: reject MTDPART_OFS_RETAIN in mtd_add_partition()
mtd_add_partition() does not reject the special offset value
MTDPART_OFS_RETAIN (-3), which leads to a WARN_ON in
add_mtd_device() when called through the BLKPG ioctl on NAND
devices. The RETAIN value depends on cur_offset being the end of
the previous partition, but in the dynamic partition path
cur_offset equals the offset argument itself, causing undefined
behavior.
Commit 5daa7b21496a ("mtd: prepare partition add and del functions
for ioctl requests") introduced mtd_add_partition() and correctly
rejected MTDPA
In the Linux kernel, the following vulnerability has been resolved:
ACPI: processor: validate MADT IOAPIC entry bounds
The IOAPIC hotplug lookup parses both MADT and _MAT records directly.
The MADT walk previously used a subtable's declared length to advance
the cursor after only locating a generic header. The _MAT path likewise
passed a generic header to the IOAPIC helper.
Validate that a current record has a complete generic header, that its
declared length is contained in the available record range, and that a
typed IOAPIC record contains the full fixed IOAPIC body before reading
its fields. Use the same relation for both MADT and _MA
ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root
In the Linux kernel, the following vulnerability has been resolved:
ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root
acpi_pci_root_add() assigns the freshly allocated root to
device->driver_data before dmar_device_add() and pci_acpi_scan_root().
Both failure paths reach the end: label where root is kfree()'d, but
only the pci_acpi_scan_root() path clears driver_data first.
When dmar_device_add() fails during a hot-add, root is freed while
device->driver_data still points at it. The ACPI core does not clear
driver_data on attach failure, so a later acpi_pci_find_root() call may
dereference this dangling pointer.
acpi_
ext4: use fsdata to track inline data write state and fix race
In the Linux kernel, the following vulnerability has been resolved:
ext4: use fsdata to track inline data write state and fix race
Instead of checking the live inode state (ext4_has_inline_data(inode)
and ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) in the
write_end handlers, use the fsdata parameter of the address space
operations to explicitly pass down the state in which write_begin
prepared the write.
A concurrent thread (such as ext4_page_mkwrite()) can convert the
inline data to an extent between write_begin and write_end. If this
happens, the write_end handlers would previously miss the inline
write_end path and fall th
ext4: validate readdir offset before accessing dirent
In the Linux kernel, the following vulnerability has been resolved:
ext4: validate readdir offset before accessing dirent
A corrupted directory can trigger the following KASAN report when
ext4_readdir() resumes from an invalid position:
BUG: KASAN: use-after-free in __ext4_check_dir_entry+0x5ef/0x820
Read of size 2 at addr ffff88810a646000 by task repro_linear/509
Call Trace:
<TASK>
dump_stack_lvl+0x53/0x70
print_report+0xd0/0x630
kasan_report+0xce/0x100
__ext4_check_dir_entry+0x5ef/0x820
ext4_readdir+0xcde/0x2b70
iterate_dir+0x1a1/0x520
__x64_sys_getdents64+0x12b/0x220
do_syscall_64+0xf9/0x540
entry_SY
wifi: ath6kl: avoid buffer overreads in WMI event handlers
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath6kl: avoid buffer overreads in WMI event handlers
The following WMI event handlers currently read from the event buffer
without first verifying that the message was large enough to hold the
expected event:
ath6kl_wmi_scan_complete_rx()
ath6kl_wmi_addba_req_event_rx()
ath6kl_wmi_delba_req_event_rx()
Add length checks to prevent overread.
pinctrl: mediatek: use devm_gpiochip_add_data() for GPIO chip
In the Linux kernel, the following vulnerability has been resolved:
pinctrl: mediatek: use devm_gpiochip_add_data() for GPIO chip
The gpio_chip is allocated with device-managed memory but registered with
the non-managed gpiochip_add_data(). This was harmless while the drivers
were built-in, but once they can be built as modules and unbound/rmmod'd,
devm frees the gpio_chip's memory while it is still registered, causing a
use-after-free.
Register it with devm_gpiochip_add_data() so it shares the same
device-managed lifecycle, which also lets the manual gpiochip_remove()
error paths go away.
RDMA/mlx5: Fix integer overflow of user QP buffer size
In the Linux kernel, the following vulnerability has been resolved:
RDMA/mlx5: Fix integer overflow of user QP buffer size
set_user_buf_size() computes the QP buffer size by left-shifting the
user-supplied rq.wqe_cnt and rq.wqe_shift values as signed integers.
A sufficiently large rq.wqe_cnt causes signed integer overflow, which
is undefined behavior, and yields a small or negative buf_size, causing
ib_umem_get() to map a buffer smaller than the hardware will actually
write into.
Replace the shifts and addition with check_shl_overflow() and
check_add_overflow(), rejecting invalid user inputs.
Moreover, guard the identical shift computing