| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: add missing size check in amdgpu_debugfs_gprwave_read()
Avoid a possible buffer overflow if size is larger than 4K.
(cherry picked from commit f5d873f5825b40d886d03bd2aede91d4cf002434) |
| In the Linux kernel, the following vulnerability has been resolved:
dm cache: fix potential out-of-bounds access on the first resume
Out-of-bounds access occurs if the fast device is expanded unexpectedly
before the first-time resume of the cache table. This happens because
expanding the fast device requires reloading the cache table for
cache_create to allocate new in-core data structures that fit the new
size, and the check in cache_preresume is not performed during the
first resume, leading to the issue.
Reproduce steps:
1. prepare component devices:
dmsetup create cmeta --table "0 8192 linear /dev/sdc 0"
dmsetup create cdata --table "0 65536 linear /dev/sdc 8192"
dmsetup create corig --table "0 524288 linear /dev/sdc 262144"
dd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct
2. load a cache table of 512 cache blocks, and deliberately expand the
fast device before resuming the cache, making the in-core data
structures inadequate.
dmsetup create cache --notable
dmsetup reload cache --table "0 524288 cache /dev/mapper/cmeta \
/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0"
dmsetup reload cdata --table "0 131072 linear /dev/sdc 8192"
dmsetup resume cdata
dmsetup resume cache
3. suspend the cache to write out the in-core dirty bitset and hint
array, leading to out-of-bounds access to the dirty bitset at offset
0x40:
dmsetup suspend cache
KASAN reports:
BUG: KASAN: vmalloc-out-of-bounds in is_dirty_callback+0x2b/0x80
Read of size 8 at addr ffffc90000085040 by task dmsetup/90
(...snip...)
The buggy address belongs to the virtual mapping at
[ffffc90000085000, ffffc90000087000) created by:
cache_ctr+0x176a/0x35f0
(...snip...)
Memory state around the buggy address:
ffffc90000084f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90000084f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc90000085000: 00 00 00 00 00 00 00 00 f8 f8 f8 f8 f8 f8 f8 f8
^
ffffc90000085080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90000085100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
Fix by checking the size change on the first resume. |
| In the Linux kernel, the following vulnerability has been resolved:
filemap: Fix bounds checking in filemap_read()
If the caller supplies an iocb->ki_pos value that is close to the
filesystem upper limit, and an iterator with a count that causes us to
overflow that limit, then filemap_read() enters an infinite loop.
This behaviour was discovered when testing xfstests generic/525 with the
"localio" optimisation for loopback NFS mounts. |
| In the Linux kernel, the following vulnerability has been resolved:
signal: restore the override_rlimit logic
Prior to commit d64696905554 ("Reimplement RLIMIT_SIGPENDING on top of
ucounts") UCOUNT_RLIMIT_SIGPENDING rlimit was not enforced for a class of
signals. However now it's enforced unconditionally, even if
override_rlimit is set. This behavior change caused production issues.
For example, if the limit is reached and a process receives a SIGSEGV
signal, sigqueue_alloc fails to allocate the necessary resources for the
signal delivery, preventing the signal from being delivered with siginfo.
This prevents the process from correctly identifying the fault address and
handling the error. From the user-space perspective, applications are
unaware that the limit has been reached and that the siginfo is
effectively 'corrupted'. This can lead to unpredictable behavior and
crashes, as we observed with java applications.
Fix this by passing override_rlimit into inc_rlimit_get_ucounts() and skip
the comparison to max there if override_rlimit is set. This effectively
restores the old behavior. |
| In the Linux kernel, the following vulnerability has been resolved:
vsock/virtio: Initialization of the dangling pointer occurring in vsk->trans
During loopback communication, a dangling pointer can be created in
vsk->trans, potentially leading to a Use-After-Free condition. This
issue is resolved by initializing vsk->trans to NULL. |
| In the Linux kernel, the following vulnerability has been resolved:
macsec: Fix use-after-free while sending the offloading packet
KASAN reports the following UAF. The metadata_dst, which is used to
store the SCI value for macsec offload, is already freed by
metadata_dst_free() in macsec_free_netdev(), while driver still use it
for sending the packet.
To fix this issue, dst_release() is used instead to release
metadata_dst. So it is not freed instantly in macsec_free_netdev() if
still referenced by skb.
BUG: KASAN: slab-use-after-free in mlx5e_xmit+0x1e8f/0x4190 [mlx5_core]
Read of size 2 at addr ffff88813e42e038 by task kworker/7:2/714
[...]
Workqueue: mld mld_ifc_work
Call Trace:
<TASK>
dump_stack_lvl+0x51/0x60
print_report+0xc1/0x600
kasan_report+0xab/0xe0
mlx5e_xmit+0x1e8f/0x4190 [mlx5_core]
dev_hard_start_xmit+0x120/0x530
sch_direct_xmit+0x149/0x11e0
__qdisc_run+0x3ad/0x1730
__dev_queue_xmit+0x1196/0x2ed0
vlan_dev_hard_start_xmit+0x32e/0x510 [8021q]
dev_hard_start_xmit+0x120/0x530
__dev_queue_xmit+0x14a7/0x2ed0
macsec_start_xmit+0x13e9/0x2340
dev_hard_start_xmit+0x120/0x530
__dev_queue_xmit+0x14a7/0x2ed0
ip6_finish_output2+0x923/0x1a70
ip6_finish_output+0x2d7/0x970
ip6_output+0x1ce/0x3a0
NF_HOOK.constprop.0+0x15f/0x190
mld_sendpack+0x59a/0xbd0
mld_ifc_work+0x48a/0xa80
process_one_work+0x5aa/0xe50
worker_thread+0x79c/0x1290
kthread+0x28f/0x350
ret_from_fork+0x2d/0x70
ret_from_fork_asm+0x11/0x20
</TASK>
Allocated by task 3922:
kasan_save_stack+0x20/0x40
kasan_save_track+0x10/0x30
__kasan_kmalloc+0x77/0x90
__kmalloc_noprof+0x188/0x400
metadata_dst_alloc+0x1f/0x4e0
macsec_newlink+0x914/0x1410
__rtnl_newlink+0xe08/0x15b0
rtnl_newlink+0x5f/0x90
rtnetlink_rcv_msg+0x667/0xa80
netlink_rcv_skb+0x12c/0x360
netlink_unicast+0x551/0x770
netlink_sendmsg+0x72d/0xbd0
__sock_sendmsg+0xc5/0x190
____sys_sendmsg+0x52e/0x6a0
___sys_sendmsg+0xeb/0x170
__sys_sendmsg+0xb5/0x140
do_syscall_64+0x4c/0x100
entry_SYSCALL_64_after_hwframe+0x4b/0x53
Freed by task 4011:
kasan_save_stack+0x20/0x40
kasan_save_track+0x10/0x30
kasan_save_free_info+0x37/0x50
poison_slab_object+0x10c/0x190
__kasan_slab_free+0x11/0x30
kfree+0xe0/0x290
macsec_free_netdev+0x3f/0x140
netdev_run_todo+0x450/0xc70
rtnetlink_rcv_msg+0x66f/0xa80
netlink_rcv_skb+0x12c/0x360
netlink_unicast+0x551/0x770
netlink_sendmsg+0x72d/0xbd0
__sock_sendmsg+0xc5/0x190
____sys_sendmsg+0x52e/0x6a0
___sys_sendmsg+0xeb/0x170
__sys_sendmsg+0xb5/0x140
do_syscall_64+0x4c/0x100
entry_SYSCALL_64_after_hwframe+0x4b/0x53 |
| In the Linux kernel, the following vulnerability has been resolved:
mlxsw: spectrum_ipip: Fix memory leak when changing remote IPv6 address
The device stores IPv6 addresses that are used for encapsulation in
linear memory that is managed by the driver.
Changing the remote address of an ip6gre net device never worked
properly, but since cited commit the following reproducer [1] would
result in a warning [2] and a memory leak [3]. The problem is that the
new remote address is never added by the driver to its hash table (and
therefore the device) and the old address is never removed from it.
Fix by programming the new address when the configuration of the ip6gre
net device changes and removing the old one. If the address did not
change, then the above would result in increasing the reference count of
the address and then decreasing it.
[1]
# ip link add name bla up type ip6gre local 2001:db8:1::1 remote 2001:db8:2::1 tos inherit ttl inherit
# ip link set dev bla type ip6gre remote 2001:db8:3::1
# ip link del dev bla
# devlink dev reload pci/0000:01:00.0
[2]
WARNING: CPU: 0 PID: 1682 at drivers/net/ethernet/mellanox/mlxsw/spectrum.c:3002 mlxsw_sp_ipv6_addr_put+0x140/0x1d0
Modules linked in:
CPU: 0 UID: 0 PID: 1682 Comm: ip Not tainted 6.12.0-rc3-custom-g86b5b55bc835 #151
Hardware name: Nvidia SN5600/VMOD0013, BIOS 5.13 05/31/2023
RIP: 0010:mlxsw_sp_ipv6_addr_put+0x140/0x1d0
[...]
Call Trace:
<TASK>
mlxsw_sp_router_netdevice_event+0x55f/0x1240
notifier_call_chain+0x5a/0xd0
call_netdevice_notifiers_info+0x39/0x90
unregister_netdevice_many_notify+0x63e/0x9d0
rtnl_dellink+0x16b/0x3a0
rtnetlink_rcv_msg+0x142/0x3f0
netlink_rcv_skb+0x50/0x100
netlink_unicast+0x242/0x390
netlink_sendmsg+0x1de/0x420
____sys_sendmsg+0x2bd/0x320
___sys_sendmsg+0x9a/0xe0
__sys_sendmsg+0x7a/0xd0
do_syscall_64+0x9e/0x1a0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
[3]
unreferenced object 0xffff898081f597a0 (size 32):
comm "ip", pid 1626, jiffies 4294719324
hex dump (first 32 bytes):
20 01 0d b8 00 02 00 00 00 00 00 00 00 00 00 01 ...............
21 49 61 83 80 89 ff ff 00 00 00 00 01 00 00 00 !Ia.............
backtrace (crc fd9be911):
[<00000000df89c55d>] __kmalloc_cache_noprof+0x1da/0x260
[<00000000ff2a1ddb>] mlxsw_sp_ipv6_addr_kvdl_index_get+0x281/0x340
[<000000009ddd445d>] mlxsw_sp_router_netdevice_event+0x47b/0x1240
[<00000000743e7757>] notifier_call_chain+0x5a/0xd0
[<000000007c7b9e13>] call_netdevice_notifiers_info+0x39/0x90
[<000000002509645d>] register_netdevice+0x5f7/0x7a0
[<00000000c2e7d2a9>] ip6gre_newlink_common.isra.0+0x65/0x130
[<0000000087cd6d8d>] ip6gre_newlink+0x72/0x120
[<000000004df7c7cc>] rtnl_newlink+0x471/0xa20
[<0000000057ed632a>] rtnetlink_rcv_msg+0x142/0x3f0
[<0000000032e0d5b5>] netlink_rcv_skb+0x50/0x100
[<00000000908bca63>] netlink_unicast+0x242/0x390
[<00000000cdbe1c87>] netlink_sendmsg+0x1de/0x420
[<0000000011db153e>] ____sys_sendmsg+0x2bd/0x320
[<000000003b6d53eb>] ___sys_sendmsg+0x9a/0xe0
[<00000000cae27c62>] __sys_sendmsg+0x7a/0xd0 |
| In the Linux kernel, the following vulnerability has been resolved:
wifi: ath10k: Fix memory leak in management tx
In the current logic, memory is allocated for storing the MSDU context
during management packet TX but this memory is not being freed during
management TX completion. Similar leaks are seen in the management TX
cleanup logic.
Kmemleak reports this problem as below,
unreferenced object 0xffffff80b64ed250 (size 16):
comm "kworker/u16:7", pid 148, jiffies 4294687130 (age 714.199s)
hex dump (first 16 bytes):
00 2b d8 d8 80 ff ff ff c4 74 e9 fd 07 00 00 00 .+.......t......
backtrace:
[<ffffffe6e7b245dc>] __kmem_cache_alloc_node+0x1e4/0x2d8
[<ffffffe6e7adde88>] kmalloc_trace+0x48/0x110
[<ffffffe6bbd765fc>] ath10k_wmi_tlv_op_gen_mgmt_tx_send+0xd4/0x1d8 [ath10k_core]
[<ffffffe6bbd3eed4>] ath10k_mgmt_over_wmi_tx_work+0x134/0x298 [ath10k_core]
[<ffffffe6e78d5974>] process_scheduled_works+0x1ac/0x400
[<ffffffe6e78d60b8>] worker_thread+0x208/0x328
[<ffffffe6e78dc890>] kthread+0x100/0x1c0
[<ffffffe6e78166c0>] ret_from_fork+0x10/0x20
Free the memory during completion and cleanup to fix the leak.
Protect the mgmt_pending_tx idr_remove() operation in
ath10k_wmi_tlv_op_cleanup_mgmt_tx_send() using ar->data_lock similar to
other instances.
Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.2.0-01387-QCAHLSWMTPLZ-1 |
| In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: clear wdev->cqm_config pointer on free
When we free wdev->cqm_config when unregistering, we also
need to clear out the pointer since the same wdev/netdev
may get re-registered in another network namespace, then
destroyed later, running this code again, which results in
a double-free. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/radeon: Fix encoder->possible_clones
Include the encoder itself in its possible_clones bitmask.
In the past nothing validated that drivers were populating
possible_clones correctly, but that changed in commit
74d2aacbe840 ("drm: Validate encoder->possible_clones").
Looks like radeon never got the memo and is still not
following the rules 100% correctly.
This results in some warnings during driver initialization:
Bogus possible_clones: [ENCODER:46:TV-46] possible_clones=0x4 (full encoder mask=0x7)
WARNING: CPU: 0 PID: 170 at drivers/gpu/drm/drm_mode_config.c:615 drm_mode_config_validate+0x113/0x39c
...
(cherry picked from commit 3b6e7d40649c0d75572039aff9d0911864c689db) |
| In the Linux kernel, the following vulnerability has been resolved:
mm/swapfile: skip HugeTLB pages for unuse_vma
I got a bad pud error and lost a 1GB HugeTLB when calling swapoff. The
problem can be reproduced by the following steps:
1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.
2. Swapout the above anonymous memory.
3. run swapoff and we will get a bad pud error in kernel message:
mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)
We can tell that pud_clear_bad is called by pud_none_or_clear_bad in
unuse_pud_range() by ftrace. And therefore the HugeTLB pages will never
be freed because we lost it from page table. We can skip HugeTLB pages
for unuse_vma to fix it. |
| In the Linux kernel, the following vulnerability has been resolved:
irqchip/gic-v4: Don't allow a VMOVP on a dying VPE
Kunkun Jiang reported that there is a small window of opportunity for
userspace to force a change of affinity for a VPE while the VPE has already
been unmapped, but the corresponding doorbell interrupt still visible in
/proc/irq/.
Plug the race by checking the value of vmapp_count, which tracks whether
the VPE is mapped ot not, and returning an error in this case.
This involves making vmapp_count common to both GICv4.1 and its v4.0
ancestor. |
| In the Linux kernel, the following vulnerability has been resolved:
net: explicitly clear the sk pointer, when pf->create fails
We have recently noticed the exact same KASAN splat as in commit
6cd4a78d962b ("net: do not leave a dangling sk pointer, when socket
creation fails"). The problem is that commit did not fully address the
problem, as some pf->create implementations do not use sk_common_release
in their error paths.
For example, we can use the same reproducer as in the above commit, but
changing ping to arping. arping uses AF_PACKET socket and if packet_create
fails, it will just sk_free the allocated sk object.
While we could chase all the pf->create implementations and make sure they
NULL the freed sk object on error from the socket, we can't guarantee
future protocols will not make the same mistake.
So it is easier to just explicitly NULL the sk pointer upon return from
pf->create in __sock_create. We do know that pf->create always releases the
allocated sk object on error, so if the pointer is not NULL, it is
definitely dangling. |
| In the Linux kernel, the following vulnerability has been resolved:
bpf: Make sure internal and UAPI bpf_redirect flags don't overlap
The bpf_redirect_info is shared between the SKB and XDP redirect paths,
and the two paths use the same numeric flag values in the ri->flags
field (specifically, BPF_F_BROADCAST == BPF_F_NEXTHOP). This means that
if skb bpf_redirect_neigh() is used with a non-NULL params argument and,
subsequently, an XDP redirect is performed using the same
bpf_redirect_info struct, the XDP path will get confused and end up
crashing, which syzbot managed to trigger.
With the stack-allocated bpf_redirect_info, the structure is no longer
shared between the SKB and XDP paths, so the crash doesn't happen
anymore. However, different code paths using identically-numbered flag
values in the same struct field still seems like a bit of a mess, so
this patch cleans that up by moving the flag definitions together and
redefining the three flags in BPF_F_REDIRECT_INTERNAL to not overlap
with the flags used for XDP. It also adds a BUILD_BUG_ON() check to make
sure the overlap is not re-introduced by mistake. |
| In the Linux kernel, the following vulnerability has been resolved:
net: sched: use RCU read-side critical section in taprio_dump()
Fix possible use-after-free in 'taprio_dump()' by adding RCU
read-side critical section there. Never seen on x86 but
found on a KASAN-enabled arm64 system when investigating
https://syzkaller.appspot.com/bug?extid=b65e0af58423fc8a73aa:
[T15862] BUG: KASAN: slab-use-after-free in taprio_dump+0xa0c/0xbb0
[T15862] Read of size 4 at addr ffff0000d4bb88f8 by task repro/15862
[T15862]
[T15862] CPU: 0 UID: 0 PID: 15862 Comm: repro Not tainted 6.11.0-rc1-00293-gdefaf1a2113a-dirty #2
[T15862] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-20240524-5.fc40 05/24/2024
[T15862] Call trace:
[T15862] dump_backtrace+0x20c/0x220
[T15862] show_stack+0x2c/0x40
[T15862] dump_stack_lvl+0xf8/0x174
[T15862] print_report+0x170/0x4d8
[T15862] kasan_report+0xb8/0x1d4
[T15862] __asan_report_load4_noabort+0x20/0x2c
[T15862] taprio_dump+0xa0c/0xbb0
[T15862] tc_fill_qdisc+0x540/0x1020
[T15862] qdisc_notify.isra.0+0x330/0x3a0
[T15862] tc_modify_qdisc+0x7b8/0x1838
[T15862] rtnetlink_rcv_msg+0x3c8/0xc20
[T15862] netlink_rcv_skb+0x1f8/0x3d4
[T15862] rtnetlink_rcv+0x28/0x40
[T15862] netlink_unicast+0x51c/0x790
[T15862] netlink_sendmsg+0x79c/0xc20
[T15862] __sock_sendmsg+0xe0/0x1a0
[T15862] ____sys_sendmsg+0x6c0/0x840
[T15862] ___sys_sendmsg+0x1ac/0x1f0
[T15862] __sys_sendmsg+0x110/0x1d0
[T15862] __arm64_sys_sendmsg+0x74/0xb0
[T15862] invoke_syscall+0x88/0x2e0
[T15862] el0_svc_common.constprop.0+0xe4/0x2a0
[T15862] do_el0_svc+0x44/0x60
[T15862] el0_svc+0x50/0x184
[T15862] el0t_64_sync_handler+0x120/0x12c
[T15862] el0t_64_sync+0x190/0x194
[T15862]
[T15862] Allocated by task 15857:
[T15862] kasan_save_stack+0x3c/0x70
[T15862] kasan_save_track+0x20/0x3c
[T15862] kasan_save_alloc_info+0x40/0x60
[T15862] __kasan_kmalloc+0xd4/0xe0
[T15862] __kmalloc_cache_noprof+0x194/0x334
[T15862] taprio_change+0x45c/0x2fe0
[T15862] tc_modify_qdisc+0x6a8/0x1838
[T15862] rtnetlink_rcv_msg+0x3c8/0xc20
[T15862] netlink_rcv_skb+0x1f8/0x3d4
[T15862] rtnetlink_rcv+0x28/0x40
[T15862] netlink_unicast+0x51c/0x790
[T15862] netlink_sendmsg+0x79c/0xc20
[T15862] __sock_sendmsg+0xe0/0x1a0
[T15862] ____sys_sendmsg+0x6c0/0x840
[T15862] ___sys_sendmsg+0x1ac/0x1f0
[T15862] __sys_sendmsg+0x110/0x1d0
[T15862] __arm64_sys_sendmsg+0x74/0xb0
[T15862] invoke_syscall+0x88/0x2e0
[T15862] el0_svc_common.constprop.0+0xe4/0x2a0
[T15862] do_el0_svc+0x44/0x60
[T15862] el0_svc+0x50/0x184
[T15862] el0t_64_sync_handler+0x120/0x12c
[T15862] el0t_64_sync+0x190/0x194
[T15862]
[T15862] Freed by task 6192:
[T15862] kasan_save_stack+0x3c/0x70
[T15862] kasan_save_track+0x20/0x3c
[T15862] kasan_save_free_info+0x4c/0x80
[T15862] poison_slab_object+0x110/0x160
[T15862] __kasan_slab_free+0x3c/0x74
[T15862] kfree+0x134/0x3c0
[T15862] taprio_free_sched_cb+0x18c/0x220
[T15862] rcu_core+0x920/0x1b7c
[T15862] rcu_core_si+0x10/0x1c
[T15862] handle_softirqs+0x2e8/0xd64
[T15862] __do_softirq+0x14/0x20 |
| In the Linux kernel, the following vulnerability has been resolved:
xfrm: fix one more kernel-infoleak in algo dumping
During fuzz testing, the following issue was discovered:
BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x598/0x2a30
_copy_to_iter+0x598/0x2a30
__skb_datagram_iter+0x168/0x1060
skb_copy_datagram_iter+0x5b/0x220
netlink_recvmsg+0x362/0x1700
sock_recvmsg+0x2dc/0x390
__sys_recvfrom+0x381/0x6d0
__x64_sys_recvfrom+0x130/0x200
x64_sys_call+0x32c8/0x3cc0
do_syscall_64+0xd8/0x1c0
entry_SYSCALL_64_after_hwframe+0x79/0x81
Uninit was stored to memory at:
copy_to_user_state_extra+0xcc1/0x1e00
dump_one_state+0x28c/0x5f0
xfrm_state_walk+0x548/0x11e0
xfrm_dump_sa+0x1e0/0x840
netlink_dump+0x943/0x1c40
__netlink_dump_start+0x746/0xdb0
xfrm_user_rcv_msg+0x429/0xc00
netlink_rcv_skb+0x613/0x780
xfrm_netlink_rcv+0x77/0xc0
netlink_unicast+0xe90/0x1280
netlink_sendmsg+0x126d/0x1490
__sock_sendmsg+0x332/0x3d0
____sys_sendmsg+0x863/0xc30
___sys_sendmsg+0x285/0x3e0
__x64_sys_sendmsg+0x2d6/0x560
x64_sys_call+0x1316/0x3cc0
do_syscall_64+0xd8/0x1c0
entry_SYSCALL_64_after_hwframe+0x79/0x81
Uninit was created at:
__kmalloc+0x571/0xd30
attach_auth+0x106/0x3e0
xfrm_add_sa+0x2aa0/0x4230
xfrm_user_rcv_msg+0x832/0xc00
netlink_rcv_skb+0x613/0x780
xfrm_netlink_rcv+0x77/0xc0
netlink_unicast+0xe90/0x1280
netlink_sendmsg+0x126d/0x1490
__sock_sendmsg+0x332/0x3d0
____sys_sendmsg+0x863/0xc30
___sys_sendmsg+0x285/0x3e0
__x64_sys_sendmsg+0x2d6/0x560
x64_sys_call+0x1316/0x3cc0
do_syscall_64+0xd8/0x1c0
entry_SYSCALL_64_after_hwframe+0x79/0x81
Bytes 328-379 of 732 are uninitialized
Memory access of size 732 starts at ffff88800e18e000
Data copied to user address 00007ff30f48aff0
CPU: 2 PID: 18167 Comm: syz-executor.0 Not tainted 6.8.11 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Fixes copying of xfrm algorithms where some random
data of the structure fields can end up in userspace.
Padding in structures may be filled with random (possibly sensitve)
data and should never be given directly to user-space.
A similar issue was resolved in the commit
8222d5910dae ("xfrm: Zero padding when dumping algos and encap")
Found by Linux Verification Center (linuxtesting.org) with Syzkaller. |
| In the Linux kernel, the following vulnerability has been resolved:
thermal: intel: int340x: processor: Fix warning during module unload
The processor_thermal driver uses pcim_device_enable() to enable a PCI
device, which means the device will be automatically disabled on driver
detach. Thus there is no need to call pci_disable_device() again on it.
With recent PCI device resource management improvements, e.g. commit
f748a07a0b64 ("PCI: Remove legacy pcim_release()"), this problem is
exposed and triggers the warining below.
[ 224.010735] proc_thermal_pci 0000:00:04.0: disabling already-disabled device
[ 224.010747] WARNING: CPU: 8 PID: 4442 at drivers/pci/pci.c:2250 pci_disable_device+0xe5/0x100
...
[ 224.010844] Call Trace:
[ 224.010845] <TASK>
[ 224.010847] ? show_regs+0x6d/0x80
[ 224.010851] ? __warn+0x8c/0x140
[ 224.010854] ? pci_disable_device+0xe5/0x100
[ 224.010856] ? report_bug+0x1c9/0x1e0
[ 224.010859] ? handle_bug+0x46/0x80
[ 224.010862] ? exc_invalid_op+0x1d/0x80
[ 224.010863] ? asm_exc_invalid_op+0x1f/0x30
[ 224.010867] ? pci_disable_device+0xe5/0x100
[ 224.010869] ? pci_disable_device+0xe5/0x100
[ 224.010871] ? kfree+0x21a/0x2b0
[ 224.010873] pcim_disable_device+0x20/0x30
[ 224.010875] devm_action_release+0x16/0x20
[ 224.010878] release_nodes+0x47/0xc0
[ 224.010880] devres_release_all+0x9f/0xe0
[ 224.010883] device_unbind_cleanup+0x12/0x80
[ 224.010885] device_release_driver_internal+0x1ca/0x210
[ 224.010887] driver_detach+0x4e/0xa0
[ 224.010889] bus_remove_driver+0x6f/0xf0
[ 224.010890] driver_unregister+0x35/0x60
[ 224.010892] pci_unregister_driver+0x44/0x90
[ 224.010894] proc_thermal_pci_driver_exit+0x14/0x5f0 [processor_thermal_device_pci]
...
[ 224.010921] ---[ end trace 0000000000000000 ]---
Remove the excess pci_disable_device() calls.
[ rjw: Subject and changelog edits ] |
| In the Linux kernel, the following vulnerability has been resolved:
parport: Proper fix for array out-of-bounds access
The recent fix for array out-of-bounds accesses replaced sprintf()
calls blindly with snprintf(). However, since snprintf() returns the
would-be-printed size, not the actually output size, the length
calculation can still go over the given limit.
Use scnprintf() instead of snprintf(), which returns the actually
output letters, for addressing the potential out-of-bounds access
properly. |
| In the Linux kernel, the following vulnerability has been resolved:
uprobe: avoid out-of-bounds memory access of fetching args
Uprobe needs to fetch args into a percpu buffer, and then copy to ring
buffer to avoid non-atomic context problem.
Sometimes user-space strings, arrays can be very large, but the size of
percpu buffer is only page size. And store_trace_args() won't check
whether these data exceeds a single page or not, caused out-of-bounds
memory access.
It could be reproduced by following steps:
1. build kernel with CONFIG_KASAN enabled
2. save follow program as test.c
```
\#include <stdio.h>
\#include <stdlib.h>
\#include <string.h>
// If string length large than MAX_STRING_SIZE, the fetch_store_strlen()
// will return 0, cause __get_data_size() return shorter size, and
// store_trace_args() will not trigger out-of-bounds access.
// So make string length less than 4096.
\#define STRLEN 4093
void generate_string(char *str, int n)
{
int i;
for (i = 0; i < n; ++i)
{
char c = i % 26 + 'a';
str[i] = c;
}
str[n-1] = '\0';
}
void print_string(char *str)
{
printf("%s\n", str);
}
int main()
{
char tmp[STRLEN];
generate_string(tmp, STRLEN);
print_string(tmp);
return 0;
}
```
3. compile program
`gcc -o test test.c`
4. get the offset of `print_string()`
```
objdump -t test | grep -w print_string
0000000000401199 g F .text 000000000000001b print_string
```
5. configure uprobe with offset 0x1199
```
off=0x1199
cd /sys/kernel/debug/tracing/
echo "p /root/test:${off} arg1=+0(%di):ustring arg2=\$comm arg3=+0(%di):ustring"
> uprobe_events
echo 1 > events/uprobes/enable
echo 1 > tracing_on
```
6. run `test`, and kasan will report error.
==================================================================
BUG: KASAN: use-after-free in strncpy_from_user+0x1d6/0x1f0
Write of size 8 at addr ffff88812311c004 by task test/499CPU: 0 UID: 0 PID: 499 Comm: test Not tainted 6.12.0-rc3+ #18
Hardware name: Red Hat KVM, BIOS 1.16.0-4.al8 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x55/0x70
print_address_description.constprop.0+0x27/0x310
kasan_report+0x10f/0x120
? strncpy_from_user+0x1d6/0x1f0
strncpy_from_user+0x1d6/0x1f0
? rmqueue.constprop.0+0x70d/0x2ad0
process_fetch_insn+0xb26/0x1470
? __pfx_process_fetch_insn+0x10/0x10
? _raw_spin_lock+0x85/0xe0
? __pfx__raw_spin_lock+0x10/0x10
? __pte_offset_map+0x1f/0x2d0
? unwind_next_frame+0xc5f/0x1f80
? arch_stack_walk+0x68/0xf0
? is_bpf_text_address+0x23/0x30
? kernel_text_address.part.0+0xbb/0xd0
? __kernel_text_address+0x66/0xb0
? unwind_get_return_address+0x5e/0xa0
? __pfx_stack_trace_consume_entry+0x10/0x10
? arch_stack_walk+0xa2/0xf0
? _raw_spin_lock_irqsave+0x8b/0xf0
? __pfx__raw_spin_lock_irqsave+0x10/0x10
? depot_alloc_stack+0x4c/0x1f0
? _raw_spin_unlock_irqrestore+0xe/0x30
? stack_depot_save_flags+0x35d/0x4f0
? kasan_save_stack+0x34/0x50
? kasan_save_stack+0x24/0x50
? mutex_lock+0x91/0xe0
? __pfx_mutex_lock+0x10/0x10
prepare_uprobe_buffer.part.0+0x2cd/0x500
uprobe_dispatcher+0x2c3/0x6a0
? __pfx_uprobe_dispatcher+0x10/0x10
? __kasan_slab_alloc+0x4d/0x90
handler_chain+0xdd/0x3e0
handle_swbp+0x26e/0x3d0
? __pfx_handle_swbp+0x10/0x10
? uprobe_pre_sstep_notifier+0x151/0x1b0
irqentry_exit_to_user_mode+0xe2/0x1b0
asm_exc_int3+0x39/0x40
RIP: 0033:0x401199
Code: 01 c2 0f b6 45 fb 88 02 83 45 fc 01 8b 45 fc 3b 45 e4 7c b7 8b 45 e4 48 98 48 8d 50 ff 48 8b 45 e8 48 01 d0 ce
RSP: 002b:00007ffdf00576a8 EFLAGS: 00000206
RAX: 00007ffdf00576b0 RBX: 0000000000000000 RCX: 0000000000000ff2
RDX: 0000000000000ffc RSI: 0000000000000ffd RDI: 00007ffdf00576b0
RBP: 00007ffdf00586b0 R08: 00007feb2f9c0d20 R09: 00007feb2f9c0d20
R10: 0000000000000001 R11: 0000000000000202 R12: 0000000000401040
R13: 00007ffdf0058780 R14: 0000000000000000 R15: 0000000000000000
</TASK>
This commit enforces the buffer's maxlen less than a page-size to avoid
store_trace_args() out-of-memory access. |
| In the Linux kernel, the following vulnerability has been resolved:
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
syzbot managed to call xt_cluster match via ebtables:
WARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780
[..]
ebt_do_table+0x174b/0x2a40
Module registers to NFPROTO_UNSPEC, but it assumes ipv4/ipv6 packet
processing. As this is only useful to restrict locally terminating
TCP/UDP traffic, register this for ipv4 and ipv6 family only.
Pablo points out that this is a general issue, direct users of the
set/getsockopt interface can call into targets/matches that were only
intended for use with ip(6)tables.
Check all UNSPEC matches and targets for similar issues:
- matches and targets are fine except if they assume skb_network_header()
is valid -- this is only true when called from inet layer: ip(6) stack
pulls the ip/ipv6 header into linear data area.
- targets that return XT_CONTINUE or other xtables verdicts must be
restricted too, they are incompatbile with the ebtables traverser, e.g.
EBT_CONTINUE is a completely different value than XT_CONTINUE.
Most matches/targets are changed to register for NFPROTO_IPV4/IPV6, as
they are provided for use by ip(6)tables.
The MARK target is also used by arptables, so register for NFPROTO_ARP too.
While at it, bail out if connbytes fails to enable the corresponding
conntrack family.
This change passes the selftests in iptables.git. |
