| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
dmaengine: idxd: Let probe fail when workqueue cannot be enabled
The workqueue is enabled when the appropriate driver is loaded and
disabled when the driver is removed. When the driver is removed it
assumes that the workqueue was enabled successfully and proceeds to
free allocations made during workqueue enabling.
Failure during workqueue enabling does not prevent the driver from
being loaded. This is because the error path within drv_enable_wq()
returns success unless a second failure is encountered
during the error path. By returning success it is possible to load
the driver even if the workqueue cannot be enabled and
allocations that do not exist are attempted to be freed during
driver remove.
Some examples of problematic flows:
(a)
idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq():
In above flow, if idxd_wq_request_irq() fails then
idxd_wq_unmap_portal() is called on error exit path, but
drv_enable_wq() returns 0 because idxd_wq_disable() succeeds. The
driver is thus loaded successfully.
idxd_dmaengine_drv_remove()->drv_disable_wq()->idxd_wq_unmap_portal()
Above flow on driver unload triggers the WARN in devm_iounmap() because
the device resource has already been removed during error path of
drv_enable_wq().
(b)
idxd_dmaengine_drv_probe() -> drv_enable_wq() -> idxd_wq_request_irq():
In above flow, if idxd_wq_request_irq() fails then
idxd_wq_init_percpu_ref() is never called to initialize the percpu
counter, yet the driver loads successfully because drv_enable_wq()
returns 0.
idxd_dmaengine_drv_remove()->__idxd_wq_quiesce()->percpu_ref_kill():
Above flow on driver unload triggers a BUG when attempting to drop the
initial ref of the uninitialized percpu ref:
BUG: kernel NULL pointer dereference, address: 0000000000000010
Fix the drv_enable_wq() error path by returning the original error that
indicates failure of workqueue enabling. This ensures that the probe
fails when an error is encountered and the driver remove paths are only
attempted when the workqueue was enabled successfully. |
| In the Linux kernel, the following vulnerability has been resolved:
dmaengine: idxd: Prevent use after free on completion memory
On driver unload any pending descriptors are flushed at the
time the interrupt is freed:
idxd_dmaengine_drv_remove() ->
drv_disable_wq() ->
idxd_wq_free_irq() ->
idxd_flush_pending_descs().
If there are any descriptors present that need to be flushed this
flow triggers a "not present" page fault as below:
BUG: unable to handle page fault for address: ff391c97c70c9040
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
The address that triggers the fault is the address of the
descriptor that was freed moments earlier via:
drv_disable_wq()->idxd_wq_free_resources()
Fix the use after free by freeing the descriptors after any possible
usage. This is done after idxd_wq_reset() to ensure that the memory
remains accessible during possible completion writes by the device. |
| In the Linux kernel, the following vulnerability has been resolved:
HID: hid-thrustmaster: fix OOB read in thrustmaster_interrupts
Syzbot reported an slab-out-of-bounds Read in thrustmaster_probe() bug.
The root case is in missing validation check of actual number of endpoints.
Code should not blindly access usb_host_interface::endpoint array, since
it may contain less endpoints than code expects.
Fix it by adding missing validaion check and print an error if
number of endpoints do not match expected number |
| In the Linux kernel, the following vulnerability has been resolved:
tipc: fix kernel panic when enabling bearer
When enabling a bearer on a node, a kernel panic is observed:
[ 4.498085] RIP: 0010:tipc_mon_prep+0x4e/0x130 [tipc]
...
[ 4.520030] Call Trace:
[ 4.520689] <IRQ>
[ 4.521236] tipc_link_build_proto_msg+0x375/0x750 [tipc]
[ 4.522654] tipc_link_build_state_msg+0x48/0xc0 [tipc]
[ 4.524034] __tipc_node_link_up+0xd7/0x290 [tipc]
[ 4.525292] tipc_rcv+0x5da/0x730 [tipc]
[ 4.526346] ? __netif_receive_skb_core+0xb7/0xfc0
[ 4.527601] tipc_l2_rcv_msg+0x5e/0x90 [tipc]
[ 4.528737] __netif_receive_skb_list_core+0x20b/0x260
[ 4.530068] netif_receive_skb_list_internal+0x1bf/0x2e0
[ 4.531450] ? dev_gro_receive+0x4c2/0x680
[ 4.532512] napi_complete_done+0x6f/0x180
[ 4.533570] virtnet_poll+0x29c/0x42e [virtio_net]
...
The node in question is receiving activate messages in another
thread after changing bearer status to allow message sending/
receiving in current thread:
thread 1 | thread 2
-------- | --------
|
tipc_enable_bearer() |
test_and_set_bit_lock() |
tipc_bearer_xmit_skb() |
| tipc_l2_rcv_msg()
| tipc_rcv()
| __tipc_node_link_up()
| tipc_link_build_state_msg()
| tipc_link_build_proto_msg()
| tipc_mon_prep()
| {
| ...
| // null-pointer dereference
| u16 gen = mon->dom_gen;
| ...
| }
// Not being executed yet |
tipc_mon_create() |
{ |
... |
// allocate |
mon = kzalloc(); |
... |
} |
Monitoring pointer in thread 2 is dereferenced before monitoring data
is allocated in thread 1. This causes kernel panic.
This commit fixes it by allocating the monitoring data before enabling
the bearer to receive messages. |
| In the Linux kernel, the following vulnerability has been resolved:
vdpa/mlx5: add validation for VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET command
When control vq receives a VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET command
request from the driver, presently there is no validation against the
number of queue pairs to configure, or even if multiqueue had been
negotiated or not is unverified. This may lead to kernel panic due to
uninitialized resource for the queues were there any bogus request
sent down by untrusted driver. Tie up the loose ends there. |
| In the Linux kernel, the following vulnerability has been resolved:
mISDN: Fix memory leak in dsp_pipeline_build()
dsp_pipeline_build() allocates dup pointer by kstrdup(cfg),
but then it updates dup variable by strsep(&dup, "|").
As a result when it calls kfree(dup), the dup variable contains NULL.
Found by Linux Driver Verification project (linuxtesting.org) with SVACE. |
| In the Linux kernel, the following vulnerability has been resolved:
vhost: fix hung thread due to erroneous iotlb entries
In vhost_iotlb_add_range_ctx(), range size can overflow to 0 when
start is 0 and last is ULONG_MAX. One instance where it can happen
is when userspace sends an IOTLB message with iova=size=uaddr=0
(vhost_process_iotlb_msg). So, an entry with size = 0, start = 0,
last = ULONG_MAX ends up in the iotlb. Next time a packet is sent,
iotlb_access_ok() loops indefinitely due to that erroneous entry.
Call Trace:
<TASK>
iotlb_access_ok+0x21b/0x3e0 drivers/vhost/vhost.c:1340
vq_meta_prefetch+0xbc/0x280 drivers/vhost/vhost.c:1366
vhost_transport_do_send_pkt+0xe0/0xfd0 drivers/vhost/vsock.c:104
vhost_worker+0x23d/0x3d0 drivers/vhost/vhost.c:372
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Reported by syzbot at:
https://syzkaller.appspot.com/bug?extid=0abd373e2e50d704db87
To fix this, do two things:
1. Return -EINVAL in vhost_chr_write_iter() when userspace asks to map
a range with size 0.
2. Fix vhost_iotlb_add_range_ctx() to handle the range [0, ULONG_MAX]
by splitting it into two entries. |
| In the Linux kernel, the following vulnerability has been resolved:
vdpa: fix use-after-free on vp_vdpa_remove
When vp_vdpa driver is unbind, vp_vdpa is freed in vdpa_unregister_device
and then vp_vdpa->mdev.pci_dev is dereferenced in vp_modern_remove,
triggering use-after-free.
Call Trace of unbinding driver free vp_vdpa :
do_syscall_64
vfs_write
kernfs_fop_write_iter
device_release_driver_internal
pci_device_remove
vp_vdpa_remove
vdpa_unregister_device
kobject_release
device_release
kfree
Call Trace of dereference vp_vdpa->mdev.pci_dev:
vp_modern_remove
pci_release_selected_regions
pci_release_region
pci_resource_len
pci_resource_end
(dev)->resource[(bar)].end |
| In the Linux kernel, the following vulnerability has been resolved:
ethernet: Fix error handling in xemaclite_of_probe
This node pointer is returned by of_parse_phandle() with refcount
incremented in this function. Calling of_node_put() to avoid the
refcount leak. As the remove function do. |
| In the Linux kernel, the following vulnerability has been resolved:
net: marvell: prestera: Add missing of_node_put() in prestera_switch_set_base_mac_addr
This node pointer is returned by of_find_compatible_node() with
refcount incremented. Calling of_node_put() to aovid the refcount leak. |
| In the Linux kernel, the following vulnerability has been resolved:
NFC: port100: fix use-after-free in port100_send_complete
Syzbot reported UAF in port100_send_complete(). The root case is in
missing usb_kill_urb() calls on error handling path of ->probe function.
port100_send_complete() accesses devm allocated memory which will be
freed on probe failure. We should kill this urbs before returning an
error from probe function to prevent reported use-after-free
Fail log:
BUG: KASAN: use-after-free in port100_send_complete+0x16e/0x1a0 drivers/nfc/port100.c:935
Read of size 1 at addr ffff88801bb59540 by task ksoftirqd/2/26
...
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0x8d/0x303 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
port100_send_complete+0x16e/0x1a0 drivers/nfc/port100.c:935
__usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1670
...
Allocated by task 1255:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa6/0xd0 mm/kasan/common.c:524
alloc_dr drivers/base/devres.c:116 [inline]
devm_kmalloc+0x96/0x1d0 drivers/base/devres.c:823
devm_kzalloc include/linux/device.h:209 [inline]
port100_probe+0x8a/0x1320 drivers/nfc/port100.c:1502
Freed by task 1255:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0xff/0x140 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:236 [inline]
__cache_free mm/slab.c:3437 [inline]
kfree+0xf8/0x2b0 mm/slab.c:3794
release_nodes+0x112/0x1a0 drivers/base/devres.c:501
devres_release_all+0x114/0x190 drivers/base/devres.c:530
really_probe+0x626/0xcc0 drivers/base/dd.c:670 |
| In the Linux kernel, the following vulnerability has been resolved:
gianfar: ethtool: Fix refcount leak in gfar_get_ts_info
The of_find_compatible_node() function returns a node pointer with
refcount incremented, We should use of_node_put() on it when done
Add the missing of_node_put() to release the refcount. |
| In the Linux kernel, the following vulnerability has been resolved:
sctp: fix kernel-infoleak for SCTP sockets
syzbot reported a kernel infoleak [1] of 4 bytes.
After analysis, it turned out r->idiag_expires is not initialized
if inet_sctp_diag_fill() calls inet_diag_msg_common_fill()
Make sure to clear idiag_timer/idiag_retrans/idiag_expires
and let inet_diag_msg_sctpasoc_fill() fill them again if needed.
[1]
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline]
BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:154 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668
instrument_copy_to_user include/linux/instrumented.h:121 [inline]
copyout lib/iov_iter.c:154 [inline]
_copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668
copy_to_iter include/linux/uio.h:162 [inline]
simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519
__skb_datagram_iter+0x2d5/0x11b0 net/core/datagram.c:425
skb_copy_datagram_iter+0xdc/0x270 net/core/datagram.c:533
skb_copy_datagram_msg include/linux/skbuff.h:3696 [inline]
netlink_recvmsg+0x669/0x1c80 net/netlink/af_netlink.c:1977
sock_recvmsg_nosec net/socket.c:948 [inline]
sock_recvmsg net/socket.c:966 [inline]
__sys_recvfrom+0x795/0xa10 net/socket.c:2097
__do_sys_recvfrom net/socket.c:2115 [inline]
__se_sys_recvfrom net/socket.c:2111 [inline]
__x64_sys_recvfrom+0x19d/0x210 net/socket.c:2111
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x44/0xae
Uninit was created at:
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3247 [inline]
__kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4975
kmalloc_reserve net/core/skbuff.c:354 [inline]
__alloc_skb+0x545/0xf90 net/core/skbuff.c:426
alloc_skb include/linux/skbuff.h:1158 [inline]
netlink_dump+0x3e5/0x16c0 net/netlink/af_netlink.c:2248
__netlink_dump_start+0xcf8/0xe90 net/netlink/af_netlink.c:2373
netlink_dump_start include/linux/netlink.h:254 [inline]
inet_diag_handler_cmd+0x2e7/0x400 net/ipv4/inet_diag.c:1341
sock_diag_rcv_msg+0x24a/0x620
netlink_rcv_skb+0x40c/0x7e0 net/netlink/af_netlink.c:2494
sock_diag_rcv+0x63/0x80 net/core/sock_diag.c:277
netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
netlink_unicast+0x1093/0x1360 net/netlink/af_netlink.c:1343
netlink_sendmsg+0x14d9/0x1720 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg net/socket.c:725 [inline]
sock_write_iter+0x594/0x690 net/socket.c:1061
do_iter_readv_writev+0xa7f/0xc70
do_iter_write+0x52c/0x1500 fs/read_write.c:851
vfs_writev fs/read_write.c:924 [inline]
do_writev+0x645/0xe00 fs/read_write.c:967
__do_sys_writev fs/read_write.c:1040 [inline]
__se_sys_writev fs/read_write.c:1037 [inline]
__x64_sys_writev+0xe5/0x120 fs/read_write.c:1037
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x44/0xae
Bytes 68-71 of 2508 are uninitialized
Memory access of size 2508 starts at ffff888114f9b000
Data copied to user address 00007f7fe09ff2e0
CPU: 1 PID: 3478 Comm: syz-executor306 Not tainted 5.17.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 |
| In the Linux kernel, the following vulnerability has been resolved:
net: arc_emac: Fix use after free in arc_mdio_probe()
If bus->state is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free
the "bus". But bus->name is still used in the next line, which will lead
to a use after free.
We can fix it by putting the name in a local variable and make the
bus->name point to the rodata section "name",then use the name in the
error message without referring to bus to avoid the uaf. |
| In the Linux kernel, the following vulnerability has been resolved:
staging: gdm724x: fix use after free in gdm_lte_rx()
The netif_rx_ni() function frees the skb so we can't dereference it to
save the skb->len. |
| In the Linux kernel, the following vulnerability has been resolved:
tracing/osnoise: Do not unregister events twice
Nicolas reported that using:
# trace-cmd record -e all -M 10 -p osnoise --poll
Resulted in the following kernel warning:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1217 at kernel/tracepoint.c:404 tracepoint_probe_unregister+0x280/0x370
[...]
CPU: 0 PID: 1217 Comm: trace-cmd Not tainted 5.17.0-rc6-next-20220307-nico+ #19
RIP: 0010:tracepoint_probe_unregister+0x280/0x370
[...]
CR2: 00007ff919b29497 CR3: 0000000109da4005 CR4: 0000000000170ef0
Call Trace:
<TASK>
osnoise_workload_stop+0x36/0x90
tracing_set_tracer+0x108/0x260
tracing_set_trace_write+0x94/0xd0
? __check_object_size.part.0+0x10a/0x150
? selinux_file_permission+0x104/0x150
vfs_write+0xb5/0x290
ksys_write+0x5f/0xe0
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff919a18127
[...]
---[ end trace 0000000000000000 ]---
The warning complains about an attempt to unregister an
unregistered tracepoint.
This happens on trace-cmd because it first stops tracing, and
then switches the tracer to nop. Which is equivalent to:
# cd /sys/kernel/tracing/
# echo osnoise > current_tracer
# echo 0 > tracing_on
# echo nop > current_tracer
The osnoise tracer stops the workload when no trace instance
is actually collecting data. This can be caused both by
disabling tracing or disabling the tracer itself.
To avoid unregistering events twice, use the existing
trace_osnoise_callback_enabled variable to check if the events
(and the workload) are actually active before trying to
deactivate them. |
| In the Linux kernel, the following vulnerability has been resolved:
watch_queue: Fix filter limit check
In watch_queue_set_filter(), there are a couple of places where we check
that the filter type value does not exceed what the type_filter bitmap
can hold. One place calculates the number of bits by:
if (tf[i].type >= sizeof(wfilter->type_filter) * 8)
which is fine, but the second does:
if (tf[i].type >= sizeof(wfilter->type_filter) * BITS_PER_LONG)
which is not. This can lead to a couple of out-of-bounds writes due to
a too-large type:
(1) __set_bit() on wfilter->type_filter
(2) Writing more elements in wfilter->filters[] than we allocated.
Fix this by just using the proper WATCH_TYPE__NR instead, which is the
number of types we actually know about.
The bug may cause an oops looking something like:
BUG: KASAN: slab-out-of-bounds in watch_queue_set_filter+0x659/0x740
Write of size 4 at addr ffff88800d2c66bc by task watch_queue_oob/611
...
Call Trace:
<TASK>
dump_stack_lvl+0x45/0x59
print_address_description.constprop.0+0x1f/0x150
...
kasan_report.cold+0x7f/0x11b
...
watch_queue_set_filter+0x659/0x740
...
__x64_sys_ioctl+0x127/0x190
do_syscall_64+0x43/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
Allocated by task 611:
kasan_save_stack+0x1e/0x40
__kasan_kmalloc+0x81/0xa0
watch_queue_set_filter+0x23a/0x740
__x64_sys_ioctl+0x127/0x190
do_syscall_64+0x43/0x90
entry_SYSCALL_64_after_hwframe+0x44/0xae
The buggy address belongs to the object at ffff88800d2c66a0
which belongs to the cache kmalloc-32 of size 32
The buggy address is located 28 bytes inside of
32-byte region [ffff88800d2c66a0, ffff88800d2c66c0) |
| In the Linux kernel, the following vulnerability has been resolved:
block: release rq qos structures for queue without disk
blkcg_init_queue() may add rq qos structures to request queue, previously
blk_cleanup_queue() calls rq_qos_exit() to release them, but commit
8e141f9eb803 ("block: drain file system I/O on del_gendisk")
moves rq_qos_exit() into del_gendisk(), so memory leak is caused
because queues may not have disk, such as un-present scsi luns, nvme
admin queue, ...
Fixes the issue by adding rq_qos_exit() to blk_cleanup_queue() back.
BTW, v5.18 won't need this patch any more since we move
blkcg_init_queue()/blkcg_exit_queue() into disk allocation/release
handler, and patches have been in for-5.18/block. |
| In the Linux kernel, the following vulnerability has been resolved:
ice: fix NULL pointer dereference in ice_update_vsi_tx_ring_stats()
It is possible to do NULL pointer dereference in routine that updates
Tx ring stats. Currently only stats and bytes are updated when ring
pointer is valid, but later on ring is accessed to propagate gathered Tx
stats onto VSI stats.
Change the existing logic to move to next ring when ring is NULL. |
| In the Linux kernel, the following vulnerability has been resolved:
iavf: Fix hang during reboot/shutdown
Recent commit 974578017fc1 ("iavf: Add waiting so the port is
initialized in remove") adds a wait-loop at the beginning of
iavf_remove() to ensure that port initialization is finished
prior unregistering net device. This causes a regression
in reboot/shutdown scenario because in this case callback
iavf_shutdown() is called and this callback detaches the device,
makes it down if it is running and sets its state to __IAVF_REMOVE.
Later shutdown callback of associated PF driver (e.g. ice_shutdown)
is called. That callback calls among other things sriov_disable()
that calls indirectly iavf_remove() (see stack trace below).
As the adapter state is already __IAVF_REMOVE then the mentioned
loop is end-less and shutdown process hangs.
The patch fixes this by checking adapter's state at the beginning
of iavf_remove() and skips the rest of the function if the adapter
is already in remove state (shutdown is in progress).
Reproducer:
1. Create VF on PF driven by ice or i40e driver
2. Ensure that the VF is bound to iavf driver
3. Reboot
[52625.981294] sysrq: SysRq : Show Blocked State
[52625.988377] task:reboot state:D stack: 0 pid:17359 ppid: 1 f2
[52625.996732] Call Trace:
[52625.999187] __schedule+0x2d1/0x830
[52626.007400] schedule+0x35/0xa0
[52626.010545] schedule_hrtimeout_range_clock+0x83/0x100
[52626.020046] usleep_range+0x5b/0x80
[52626.023540] iavf_remove+0x63/0x5b0 [iavf]
[52626.027645] pci_device_remove+0x3b/0xc0
[52626.031572] device_release_driver_internal+0x103/0x1f0
[52626.036805] pci_stop_bus_device+0x72/0xa0
[52626.040904] pci_stop_and_remove_bus_device+0xe/0x20
[52626.045870] pci_iov_remove_virtfn+0xba/0x120
[52626.050232] sriov_disable+0x2f/0xe0
[52626.053813] ice_free_vfs+0x7c/0x340 [ice]
[52626.057946] ice_remove+0x220/0x240 [ice]
[52626.061967] ice_shutdown+0x16/0x50 [ice]
[52626.065987] pci_device_shutdown+0x34/0x60
[52626.070086] device_shutdown+0x165/0x1c5
[52626.074011] kernel_restart+0xe/0x30
[52626.077593] __do_sys_reboot+0x1d2/0x210
[52626.093815] do_syscall_64+0x5b/0x1a0
[52626.097483] entry_SYSCALL_64_after_hwframe+0x65/0xca |
