| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
blk-cgroup: Fix NULL deref caused by blkg_policy_data being installed before init
blk-iocost sometimes causes the following crash:
BUG: kernel NULL pointer dereference, address: 00000000000000e0
...
RIP: 0010:_raw_spin_lock+0x17/0x30
Code: be 01 02 00 00 e8 79 38 39 ff 31 d2 89 d0 5d c3 0f 1f 00 0f 1f 44 00 00 55 48 89 e5 65 ff 05 48 d0 34 7e b9 01 00 00 00 31 c0 <f0> 0f b1 0f 75 02 5d c3 89 c6 e8 ea 04 00 00 5d c3 0f 1f 84 00 00
RSP: 0018:ffffc900023b3d40 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 00000000000000e0 RCX: 0000000000000001
RDX: ffffc900023b3d20 RSI: ffffc900023b3cf0 RDI: 00000000000000e0
RBP: ffffc900023b3d40 R08: ffffc900023b3c10 R09: 0000000000000003
R10: 0000000000000064 R11: 000000000000000a R12: ffff888102337000
R13: fffffffffffffff2 R14: ffff88810af408c8 R15: ffff8881070c3600
FS: 00007faaaf364fc0(0000) GS:ffff88842fdc0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000e0 CR3: 00000001097b1000 CR4: 0000000000350ea0
Call Trace:
<TASK>
ioc_weight_write+0x13d/0x410
cgroup_file_write+0x7a/0x130
kernfs_fop_write_iter+0xf5/0x170
vfs_write+0x298/0x370
ksys_write+0x5f/0xb0
__x64_sys_write+0x1b/0x20
do_syscall_64+0x3d/0x80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
This happens because iocg->ioc is NULL. The field is initialized by
ioc_pd_init() and never cleared. The NULL deref is caused by
blkcg_activate_policy() installing blkg_policy_data before initializing it.
blkcg_activate_policy() was doing the following:
1. Allocate pd's for all existing blkg's and install them in blkg->pd[].
2. Initialize all pd's.
3. Online all pd's.
blkcg_activate_policy() only grabs the queue_lock and may release and
re-acquire the lock as allocation may need to sleep. ioc_weight_write()
grabs blkcg->lock and iterates all its blkg's. The two can race and if
ioc_weight_write() runs during #1 or between #1 and #2, it can encounter a
pd which is not initialized yet, leading to crash.
The crash can be reproduced with the following script:
#!/bin/bash
echo +io > /sys/fs/cgroup/cgroup.subtree_control
systemd-run --unit touch-sda --scope dd if=/dev/sda of=/dev/null bs=1M count=1 iflag=direct
echo 100 > /sys/fs/cgroup/system.slice/io.weight
bash -c "echo '8:0 enable=1' > /sys/fs/cgroup/io.cost.qos" &
sleep .2
echo 100 > /sys/fs/cgroup/system.slice/io.weight
with the following patch applied:
> diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
> index fc49be622e05..38d671d5e10c 100644
> --- a/block/blk-cgroup.c
> +++ b/block/blk-cgroup.c
> @@ -1553,6 +1553,12 @@ int blkcg_activate_policy(struct gendisk *disk, const struct blkcg_policy *pol)
> pd->online = false;
> }
>
> + if (system_state == SYSTEM_RUNNING) {
> + spin_unlock_irq(&q->queue_lock);
> + ssleep(1);
> + spin_lock_irq(&q->queue_lock);
> + }
> +
> /* all allocated, init in the same order */
> if (pol->pd_init_fn)
> list_for_each_entry_reverse(blkg, &q->blkg_list, q_node)
I don't see a reason why all pd's should be allocated, initialized and
onlined together. The only ordering requirement is that parent blkgs to be
initialized and onlined before children, which is guaranteed from the
walking order. Let's fix the bug by allocating, initializing and onlining pd
for each blkg and holding blkcg->lock over initialization and onlining. This
ensures that an installed blkg is always fully initialized and onlined
removing the the race window. |
| NVIDIA Display Driver for Linux contains a vulnerability where an attacker might be able to use a race condition to escalate privileges. A successful exploit of this vulnerability might lead to code execution, escalation of privileges, data tampering, denial of service, and information disclosure. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd: Fix an out of bounds error in BIOS parser
The array is hardcoded to 8 in atomfirmware.h, but firmware provides
a bigger one sometimes. Deferencing the larger array causes an out
of bounds error.
commit 4fc1ba4aa589 ("drm/amd/display: fix array index out of bound error
in bios parser") fixed some of this, but there are two other cases
not covered by it. Fix those as well. |
| In the Linux kernel, the following vulnerability has been resolved:
tty: serial: imx: disable Ageing Timer interrupt request irq
There maybe pending USR interrupt before requesting irq, however
uart_add_one_port has not executed, so there will be kernel panic:
[ 0.795668] Unable to handle kernel NULL pointer dereference at virtual addre
ss 0000000000000080
[ 0.802701] Mem abort info:
[ 0.805367] ESR = 0x0000000096000004
[ 0.808950] EC = 0x25: DABT (current EL), IL = 32 bits
[ 0.814033] SET = 0, FnV = 0
[ 0.816950] EA = 0, S1PTW = 0
[ 0.819950] FSC = 0x04: level 0 translation fault
[ 0.824617] Data abort info:
[ 0.827367] ISV = 0, ISS = 0x00000004
[ 0.831033] CM = 0, WnR = 0
[ 0.833866] [0000000000000080] user address but active_mm is swapper
[ 0.839951] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
[ 0.845953] Modules linked in:
[ 0.848869] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.1+g56321e101aca #1
[ 0.855617] Hardware name: Freescale i.MX8MP EVK (DT)
[ 0.860452] pstate: 000000c5 (nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 0.867117] pc : __imx_uart_rxint.constprop.0+0x11c/0x2c0
[ 0.872283] lr : imx_uart_int+0xf8/0x1ec
The issue only happends in the inmate linux when Jailhouse hypervisor
enabled. The test procedure is:
while true; do
jailhouse enable imx8mp.cell
jailhouse cell linux xxxx
sleep 10
jailhouse cell destroy 1
jailhouse disable
sleep 5
done
And during the upper test, press keys to the 2nd linux console.
When `jailhouse cell destroy 1`, the 2nd linux has no chance to put
the uart to a quiese state, so USR1/2 may has pending interrupts. Then
when `jailhosue cell linux xx` to start 2nd linux again, the issue
trigger.
In order to disable irqs before requesting them, both UCR1 and UCR2 irqs
should be disabled, so here fix that, disable the Ageing Timer interrupt
in UCR2 as UCR1 does. |
| In the Linux kernel, the following vulnerability has been resolved:
nfsd: move init of percpu reply_cache_stats counters back to nfsd_init_net
Commit f5f9d4a314da ("nfsd: move reply cache initialization into nfsd
startup") moved the initialization of the reply cache into nfsd startup,
but didn't account for the stats counters, which can be accessed before
nfsd is ever started. The result can be a NULL pointer dereference when
someone accesses /proc/fs/nfsd/reply_cache_stats while nfsd is still
shut down.
This is a regression and a user-triggerable oops in the right situation:
- non-x86_64 arch
- /proc/fs/nfsd is mounted in the namespace
- nfsd is not started in the namespace
- unprivileged user calls "cat /proc/fs/nfsd/reply_cache_stats"
Although this is easy to trigger on some arches (like aarch64), on
x86_64, calling this_cpu_ptr(NULL) evidently returns a pointer to the
fixed_percpu_data. That struct looks just enough like a newly
initialized percpu var to allow nfsd_reply_cache_stats_show to access
it without Oopsing.
Move the initialization of the per-net+per-cpu reply-cache counters
back into nfsd_init_net, while leaving the rest of the reply cache
allocations to be done at nfsd startup time.
Kudos to Eirik who did most of the legwork to track this down. |
| In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: fortify the spinlock against deadlock by interrupt
In the function ieee80211_tx_dequeue() there is a particular locking
sequence:
begin:
spin_lock(&local->queue_stop_reason_lock);
q_stopped = local->queue_stop_reasons[q];
spin_unlock(&local->queue_stop_reason_lock);
However small the chance (increased by ftracetest), an asynchronous
interrupt can occur in between of spin_lock() and spin_unlock(),
and the interrupt routine will attempt to lock the same
&local->queue_stop_reason_lock again.
This will cause a costly reset of the CPU and the wifi device or an
altogether hang in the single CPU and single core scenario.
The only remaining spin_lock(&local->queue_stop_reason_lock) that
did not disable interrupts was patched, which should prevent any
deadlocks on the same CPU/core and the same wifi device.
This is the probable trace of the deadlock:
kernel: ================================
kernel: WARNING: inconsistent lock state
kernel: 6.3.0-rc6-mt-20230401-00001-gf86822a1170f #4 Tainted: G W
kernel: --------------------------------
kernel: inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
kernel: kworker/5:0/25656 [HC0[0]:SC0[0]:HE1:SE1] takes:
kernel: ffff9d6190779478 (&local->queue_stop_reason_lock){+.?.}-{2:2}, at: return_to_handler+0x0/0x40
kernel: {IN-SOFTIRQ-W} state was registered at:
kernel: lock_acquire+0xc7/0x2d0
kernel: _raw_spin_lock+0x36/0x50
kernel: ieee80211_tx_dequeue+0xb4/0x1330 [mac80211]
kernel: iwl_mvm_mac_itxq_xmit+0xae/0x210 [iwlmvm]
kernel: iwl_mvm_mac_wake_tx_queue+0x2d/0xd0 [iwlmvm]
kernel: ieee80211_queue_skb+0x450/0x730 [mac80211]
kernel: __ieee80211_xmit_fast.constprop.66+0x834/0xa50 [mac80211]
kernel: __ieee80211_subif_start_xmit+0x217/0x530 [mac80211]
kernel: ieee80211_subif_start_xmit+0x60/0x580 [mac80211]
kernel: dev_hard_start_xmit+0xb5/0x260
kernel: __dev_queue_xmit+0xdbe/0x1200
kernel: neigh_resolve_output+0x166/0x260
kernel: ip_finish_output2+0x216/0xb80
kernel: __ip_finish_output+0x2a4/0x4d0
kernel: ip_finish_output+0x2d/0xd0
kernel: ip_output+0x82/0x2b0
kernel: ip_local_out+0xec/0x110
kernel: igmpv3_sendpack+0x5c/0x90
kernel: igmp_ifc_timer_expire+0x26e/0x4e0
kernel: call_timer_fn+0xa5/0x230
kernel: run_timer_softirq+0x27f/0x550
kernel: __do_softirq+0xb4/0x3a4
kernel: irq_exit_rcu+0x9b/0xc0
kernel: sysvec_apic_timer_interrupt+0x80/0xa0
kernel: asm_sysvec_apic_timer_interrupt+0x1f/0x30
kernel: _raw_spin_unlock_irqrestore+0x3f/0x70
kernel: free_to_partial_list+0x3d6/0x590
kernel: __slab_free+0x1b7/0x310
kernel: kmem_cache_free+0x52d/0x550
kernel: putname+0x5d/0x70
kernel: do_sys_openat2+0x1d7/0x310
kernel: do_sys_open+0x51/0x80
kernel: __x64_sys_openat+0x24/0x30
kernel: do_syscall_64+0x5c/0x90
kernel: entry_SYSCALL_64_after_hwframe+0x72/0xdc
kernel: irq event stamp: 5120729
kernel: hardirqs last enabled at (5120729): [<ffffffff9d149936>] trace_graph_return+0xd6/0x120
kernel: hardirqs last disabled at (5120728): [<ffffffff9d149950>] trace_graph_return+0xf0/0x120
kernel: softirqs last enabled at (5069900): [<ffffffff9cf65b60>] return_to_handler+0x0/0x40
kernel: softirqs last disabled at (5067555): [<ffffffff9cf65b60>] return_to_handler+0x0/0x40
kernel:
other info that might help us debug this:
kernel: Possible unsafe locking scenario:
kernel: CPU0
kernel: ----
kernel: lock(&local->queue_stop_reason_lock);
kernel: <Interrupt>
kernel: lock(&local->queue_stop_reason_lock);
kernel:
*** DEADLOCK ***
kernel: 8 locks held by kworker/5:0/25656:
kernel: #0: ffff9d618009d138 ((wq_completion)events_freezable){+.+.}-{0:0}, at: process_one_work+0x1ca/0x530
kernel: #1: ffffb1ef4637fe68 ((work_completion)(&local->restart_work)){+.+.}-{0:0}, at: process_one_work+0x1ce/0x530
kernel: #2: ffffffff9f166548 (rtnl_mutex){+.+.}-{3:3}, at: return_to_handler+0x0/0x40
kernel: #3: ffff9d619
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
bpf: Disable preemption in bpf_perf_event_output
The nesting protection in bpf_perf_event_output relies on disabled
preemption, which is guaranteed for kprobes and tracepoints.
However bpf_perf_event_output can be also called from uprobes context
through bpf_prog_run_array_sleepable function which disables migration,
but keeps preemption enabled.
This can cause task to be preempted by another one inside the nesting
protection and lead eventually to two tasks using same perf_sample_data
buffer and cause crashes like:
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle page fault for address: ffffffff82be3eea
...
Call Trace:
? __die+0x1f/0x70
? page_fault_oops+0x176/0x4d0
? exc_page_fault+0x132/0x230
? asm_exc_page_fault+0x22/0x30
? perf_output_sample+0x12b/0x910
? perf_event_output+0xd0/0x1d0
? bpf_perf_event_output+0x162/0x1d0
? bpf_prog_c6271286d9a4c938_krava1+0x76/0x87
? __uprobe_perf_func+0x12b/0x540
? uprobe_dispatcher+0x2c4/0x430
? uprobe_notify_resume+0x2da/0xce0
? atomic_notifier_call_chain+0x7b/0x110
? exit_to_user_mode_prepare+0x13e/0x290
? irqentry_exit_to_user_mode+0x5/0x30
? asm_exc_int3+0x35/0x40
Fixing this by disabling preemption in bpf_perf_event_output. |
| In the Linux kernel, the following vulnerability has been resolved:
ext4: fix inode leak in ext4_xattr_inode_create() on an error path
There is issue as follows when do setxattr with inject fault:
[localhost]# fsck.ext4 -fn /dev/sda
e2fsck 1.46.6-rc1 (12-Sep-2022)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Unattached zero-length inode 15. Clear? no
Unattached inode 15
Connect to /lost+found? no
Pass 5: Checking group summary information
/dev/sda: ********** WARNING: Filesystem still has errors **********
/dev/sda: 15/655360 files (0.0% non-contiguous), 66755/2621440 blocks
This occurs in 'ext4_xattr_inode_create()'. If 'ext4_mark_inode_dirty()'
fails, dropping i_nlink of the inode is needed. Or will lead to inode leak. |
| In the Linux kernel, the following vulnerability has been resolved:
Revert "IB/isert: Fix incorrect release of isert connection"
Commit: 699826f4e30a ("IB/isert: Fix incorrect release of isert connection") is
causing problems on OPA when DEVICE_REMOVAL is happening.
------------[ cut here ]------------
WARNING: CPU: 52 PID: 2117247 at drivers/infiniband/core/cq.c:359
ib_cq_pool_cleanup+0xac/0xb0 [ib_core]
Modules linked in: nfsd nfs_acl target_core_user uio tcm_fc libfc
scsi_transport_fc tcm_loop target_core_pscsi target_core_iblock target_core_file
rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs
rfkill rpcrdma rdma_ucm ib_srpt sunrpc ib_isert iscsi_target_mod target_core_mod
opa_vnic ib_iser libiscsi ib_umad scsi_transport_iscsi rdma_cm ib_ipoib iw_cm
ib_cm hfi1(-) rdmavt ib_uverbs intel_rapl_msr intel_rapl_common sb_edac ib_core
x86_pkg_temp_thermal intel_powerclamp coretemp i2c_i801 mxm_wmi rapl iTCO_wdt
ipmi_si iTCO_vendor_support mei_me ipmi_devintf mei intel_cstate ioatdma
intel_uncore i2c_smbus joydev pcspkr lpc_ich ipmi_msghandler acpi_power_meter
acpi_pad xfs libcrc32c sr_mod sd_mod cdrom t10_pi sg crct10dif_pclmul
crc32_pclmul crc32c_intel drm_kms_helper drm_shmem_helper ahci libahci
ghash_clmulni_intel igb drm libata dca i2c_algo_bit wmi fuse
CPU: 52 PID: 2117247 Comm: modprobe Not tainted 6.5.0-rc1+ #1
Hardware name: Intel Corporation S2600CWR/S2600CW, BIOS
SE5C610.86B.01.01.0014.121820151719 12/18/2015
RIP: 0010:ib_cq_pool_cleanup+0xac/0xb0 [ib_core]
Code: ff 48 8b 43 40 48 8d 7b 40 48 83 e8 40 4c 39 e7 75 b3 49 83
c4 10 4d 39 fc 75 94 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc <0f> 0b eb a1
90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f
RSP: 0018:ffffc10bea13fc80 EFLAGS: 00010206
RAX: 000000000000010c RBX: ffff9bf5c7e66c00 RCX: 000000008020001d
RDX: 000000008020001e RSI: fffff175221f9900 RDI: ffff9bf5c7e67640
RBP: ffff9bf5c7e67600 R08: ffff9bf5c7e64400 R09: 000000008020001d
R10: 0000000040000000 R11: 0000000000000000 R12: ffff9bee4b1e8a18
R13: dead000000000122 R14: dead000000000100 R15: ffff9bee4b1e8a38
FS: 00007ff1e6d38740(0000) GS:ffff9bfd9fb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005652044ecc68 CR3: 0000000889b5c005 CR4: 00000000001706e0
Call Trace:
<TASK>
? __warn+0x80/0x130
? ib_cq_pool_cleanup+0xac/0xb0 [ib_core]
? report_bug+0x195/0x1a0
? handle_bug+0x3c/0x70
? exc_invalid_op+0x14/0x70
? asm_exc_invalid_op+0x16/0x20
? ib_cq_pool_cleanup+0xac/0xb0 [ib_core]
disable_device+0x9d/0x160 [ib_core]
__ib_unregister_device+0x42/0xb0 [ib_core]
ib_unregister_device+0x22/0x30 [ib_core]
rvt_unregister_device+0x20/0x90 [rdmavt]
hfi1_unregister_ib_device+0x16/0xf0 [hfi1]
remove_one+0x55/0x1a0 [hfi1]
pci_device_remove+0x36/0xa0
device_release_driver_internal+0x193/0x200
driver_detach+0x44/0x90
bus_remove_driver+0x69/0xf0
pci_unregister_driver+0x2a/0xb0
hfi1_mod_cleanup+0xc/0x3c [hfi1]
__do_sys_delete_module.constprop.0+0x17a/0x2f0
? exit_to_user_mode_prepare+0xc4/0xd0
? syscall_trace_enter.constprop.0+0x126/0x1a0
do_syscall_64+0x5c/0x90
? syscall_exit_to_user_mode+0x12/0x30
? do_syscall_64+0x69/0x90
? syscall_exit_work+0x103/0x130
? syscall_exit_to_user_mode+0x12/0x30
? do_syscall_64+0x69/0x90
? exc_page_fault+0x65/0x150
entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7ff1e643f5ab
Code: 73 01 c3 48 8b 0d 75 a8 1b 00 f7 d8 64 89 01 48 83 c8 ff c3
66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00 00 0f 05 <48> 3d 01 f0
ff ff 73 01 c3 48 8b 0d 45 a8 1b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffec9103cc8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
RAX: ffffffffffffffda RBX: 00005615267fdc50 RCX: 00007ff1e643f5ab
RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00005615267fdcb8
RBP: 00005615267fdc50 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ff1e659eac0 R11: 0000000000000206 R12: 00005615267fdcb8
R13: 00000000000
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
USB: sisusbvga: Add endpoint checks
The syzbot fuzzer was able to provoke a WARNING from the sisusbvga driver:
------------[ cut here ]------------
usb 1-1: BOGUS urb xfer, pipe 3 != type 1
WARNING: CPU: 1 PID: 26 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504
Modules linked in:
CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.2.0-rc5-syzkaller-00199-g5af6ce704936 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504
Code: 7c 24 18 e8 6c 50 80 fb 48 8b 7c 24 18 e8 62 1a 01 ff 41 89 d8 44 89 e1 4c 89 ea 48 89 c6 48 c7 c7 60 b1 fa 8a e8 84 b0 be 03 <0f> 0b e9 58 f8 ff ff e8 3e 50 80 fb 48 81 c5 c0 05 00 00 e9 84 f7
RSP: 0018:ffffc90000a1ed18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888012783a80 RSI: ffffffff816680ec RDI: fffff52000143d95
RBP: ffff888079020000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: 0000000000000003
R13: ffff888017d33370 R14: 0000000000000003 R15: ffff888021213600
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005592753a60b0 CR3: 0000000022899000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
sisusb_bulkout_msg drivers/usb/misc/sisusbvga/sisusbvga.c:224 [inline]
sisusb_send_bulk_msg.constprop.0+0x904/0x1230 drivers/usb/misc/sisusbvga/sisusbvga.c:379
sisusb_send_bridge_packet drivers/usb/misc/sisusbvga/sisusbvga.c:567 [inline]
sisusb_do_init_gfxdevice drivers/usb/misc/sisusbvga/sisusbvga.c:2077 [inline]
sisusb_init_gfxdevice+0x87b/0x4000 drivers/usb/misc/sisusbvga/sisusbvga.c:2177
sisusb_probe+0x9cd/0xbe2 drivers/usb/misc/sisusbvga/sisusbvga.c:2869
...
The problem was caused by the fact that the driver does not check
whether the endpoints it uses are actually present and have the
appropriate types. This can be fixed by adding a simple check of
the endpoints. |
| In the Linux kernel, the following vulnerability has been resolved:
exfat: use kvmalloc_array/kvfree instead of kmalloc_array/kfree
The call stack shown below is a scenario in the Linux 4.19 kernel.
Allocating memory failed where exfat fs use kmalloc_array due to
system memory fragmentation, while the u-disk was inserted without
recognition.
Devices such as u-disk using the exfat file system are pluggable and
may be insert into the system at any time.
However, long-term running systems cannot guarantee the continuity of
physical memory. Therefore, it's necessary to address this issue.
Binder:2632_6: page allocation failure: order:4,
mode:0x6040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null)
Call trace:
[242178.097582] dump_backtrace+0x0/0x4
[242178.097589] dump_stack+0xf4/0x134
[242178.097598] warn_alloc+0xd8/0x144
[242178.097603] __alloc_pages_nodemask+0x1364/0x1384
[242178.097608] kmalloc_order+0x2c/0x510
[242178.097612] kmalloc_order_trace+0x40/0x16c
[242178.097618] __kmalloc+0x360/0x408
[242178.097624] load_alloc_bitmap+0x160/0x284
[242178.097628] exfat_fill_super+0xa3c/0xe7c
[242178.097635] mount_bdev+0x2e8/0x3a0
[242178.097638] exfat_fs_mount+0x40/0x50
[242178.097643] mount_fs+0x138/0x2e8
[242178.097649] vfs_kern_mount+0x90/0x270
[242178.097655] do_mount+0x798/0x173c
[242178.097659] ksys_mount+0x114/0x1ac
[242178.097665] __arm64_sys_mount+0x24/0x34
[242178.097671] el0_svc_common+0xb8/0x1b8
[242178.097676] el0_svc_handler+0x74/0x90
[242178.097681] el0_svc+0x8/0x340
By analyzing the exfat code,we found that continuous physical memory
is not required here,so kvmalloc_array is used can solve this problem. |
| In the Linux kernel, the following vulnerability has been resolved:
quota: fix warning in dqgrab()
There's issue as follows when do fault injection:
WARNING: CPU: 1 PID: 14870 at include/linux/quotaops.h:51 dquot_disable+0x13b7/0x18c0
Modules linked in:
CPU: 1 PID: 14870 Comm: fsconfig Not tainted 6.3.0-next-20230505-00006-g5107a9c821af-dirty #541
RIP: 0010:dquot_disable+0x13b7/0x18c0
RSP: 0018:ffffc9000acc79e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88825e41b980
RDX: 0000000000000000 RSI: ffff88825e41b980 RDI: 0000000000000002
RBP: ffff888179f68000 R08: ffffffff82087ca7 R09: 0000000000000000
R10: 0000000000000001 R11: ffffed102f3ed026 R12: ffff888179f68130
R13: ffff888179f68110 R14: dffffc0000000000 R15: ffff888179f68118
FS: 00007f450a073740(0000) GS:ffff88882fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe96f2efd8 CR3: 000000025c8ad000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
dquot_load_quota_sb+0xd53/0x1060
dquot_resume+0x172/0x230
ext4_reconfigure+0x1dc6/0x27b0
reconfigure_super+0x515/0xa90
__x64_sys_fsconfig+0xb19/0xd20
do_syscall_64+0x39/0xb0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Above issue may happens as follows:
ProcessA ProcessB ProcessC
sys_fsconfig
vfs_fsconfig_locked
reconfigure_super
ext4_remount
dquot_suspend -> suspend all type quota
sys_fsconfig
vfs_fsconfig_locked
reconfigure_super
ext4_remount
dquot_resume
ret = dquot_load_quota_sb
add_dquot_ref
do_open -> open file O_RDWR
vfs_open
do_dentry_open
get_write_access
atomic_inc_unless_negative(&inode->i_writecount)
ext4_file_open
dquot_file_open
dquot_initialize
__dquot_initialize
dqget
atomic_inc(&dquot->dq_count);
__dquot_initialize
__dquot_initialize
dqget
if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags))
ext4_acquire_dquot
-> Return error DQ_ACTIVE_B flag isn't set
dquot_disable
invalidate_dquots
if (atomic_read(&dquot->dq_count))
dqgrab
WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags))
-> Trigger warning
In the above scenario, 'dquot->dq_flags' has no DQ_ACTIVE_B is normal when
dqgrab().
To solve above issue just replace the dqgrab() use in invalidate_dquots() with
atomic_inc(&dquot->dq_count). |
| In the Linux kernel, the following vulnerability has been resolved:
m68k: mm: Move initrd phys_to_virt handling after paging_init()
When booting with an initial ramdisk on platforms where physical memory
does not start at address zero (e.g. on Amiga):
initrd: 0ef0602c - 0f800000
Zone ranges:
DMA [mem 0x0000000008000000-0x000000f7ffffffff]
Normal empty
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000008000000-0x000000000f7fffff]
Initmem setup node 0 [mem 0x0000000008000000-0x000000000f7fffff]
Unable to handle kernel access at virtual address (ptrval)
Oops: 00000000
Modules linked in:
PC: [<00201d3c>] memcmp+0x28/0x56
As phys_to_virt() relies on m68k_memoffset and module_fixup(), it must
not be called before paging_init(). Hence postpone the phys_to_virt
handling for the initial ramdisk until after calling paging_init().
While at it, reduce #ifdef clutter by using IS_ENABLED() instead. |
| In the Linux kernel, the following vulnerability has been resolved:
bpf: prevent leak of lsm program after failed attach
In [0], we added the ability to bpf_prog_attach LSM programs to cgroups,
but in our validation to make sure the prog is meant to be attached to
BPF_LSM_CGROUP, we return too early if the check fails. This results in
lack of decrementing prog's refcnt (through bpf_prog_put)
leaving the LSM program alive past the point of the expected lifecycle.
This fix allows for the decrement to take place.
[0] https://lore.kernel.org/all/20220628174314.1216643-4-sdf@google.com/ |
| In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix shift-out-of-bounds due to too large exponent of block size
If field s_log_block_size of superblock data is corrupted and too large,
init_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds
warning followed by a kernel panic (if panic_on_warn is set):
shift exponent 38973 is too large for 32-bit type 'int'
Call Trace:
<TASK>
dump_stack_lvl+0xcd/0x134
ubsan_epilogue+0xb/0x50
__ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5
init_nilfs.cold.11+0x18/0x1d [nilfs2]
nilfs_mount+0x9b5/0x12b0 [nilfs2]
...
This fixes the issue by adding and using a new helper function for getting
block size with sanity check. |
| In the Linux kernel, the following vulnerability has been resolved:
bpf: Prevent decl_tag from being referenced in func_proto arg
Syzkaller managed to hit another decl_tag issue:
btf_func_proto_check kernel/bpf/btf.c:4506 [inline]
btf_check_all_types kernel/bpf/btf.c:4734 [inline]
btf_parse_type_sec+0x1175/0x1980 kernel/bpf/btf.c:4763
btf_parse kernel/bpf/btf.c:5042 [inline]
btf_new_fd+0x65a/0xb00 kernel/bpf/btf.c:6709
bpf_btf_load+0x6f/0x90 kernel/bpf/syscall.c:4342
__sys_bpf+0x50a/0x6c0 kernel/bpf/syscall.c:5034
__do_sys_bpf kernel/bpf/syscall.c:5093 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5091 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5091
do_syscall_64+0x54/0x70 arch/x86/entry/common.c:48
This seems similar to commit ea68376c8bed ("bpf: prevent decl_tag from being
referenced in func_proto") but for the argument. |
| VestaCP commit a3f0fa1 (2018-05-31) up to commit ee03eff (2018-06-13) contain embedded malicious code that resulted in a supply-chain compromise. New installations created from the compromised installer since at least May 2018 were subject to installation of Linux/ChachaDDoS, a multi-stage DDoS bot that uses Lua for second- and third-stage components. The compromise leaked administrative credentials (base64-encoded admin password and server domain) to an external URL during installation and/or resulted in the installer dropping and executing a DDoS malware payload under local system privileges. Compromised servers were subsequently observed participating in large-scale DDoS activity. Vesta acknowledged exploitation in the wild in October 2018. |
| In the Linux kernel, the following vulnerability has been resolved:
debugobjects: Don't wake up kswapd from fill_pool()
syzbot is reporting a lockdep warning in fill_pool() because the allocation
from debugobjects is using GFP_ATOMIC, which is (__GFP_HIGH | __GFP_KSWAPD_RECLAIM)
and therefore tries to wake up kswapd, which acquires kswapd_wait::lock.
Since fill_pool() might be called with arbitrary locks held, fill_pool()
should not assume that acquiring kswapd_wait::lock is safe.
Use __GFP_HIGH instead and remove __GFP_NORETRY as it is pointless for
!__GFP_DIRECT_RECLAIM allocation. |
| In the Linux kernel, the following vulnerability has been resolved:
clk: zynqmp: Fix stack-out-of-bounds in strncpy`
"BUG: KASAN: stack-out-of-bounds in strncpy+0x30/0x68"
Linux-ATF interface is using 16 bytes of SMC payload. In case clock name is
longer than 15 bytes, string terminated NULL character will not be received
by Linux. Add explicit NULL character at last byte to fix issues when clock
name is longer.
This fixes below bug reported by KASAN:
==================================================================
BUG: KASAN: stack-out-of-bounds in strncpy+0x30/0x68
Read of size 1 at addr ffff0008c89a7410 by task swapper/0/1
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.4.0-00396-g81ef9e7-dirty #3
Hardware name: Xilinx Versal vck190 Eval board revA (QSPI) (DT)
Call trace:
dump_backtrace+0x0/0x1e8
show_stack+0x14/0x20
dump_stack+0xd4/0x108
print_address_description.isra.0+0xbc/0x37c
__kasan_report+0x144/0x198
kasan_report+0xc/0x18
__asan_load1+0x5c/0x68
strncpy+0x30/0x68
zynqmp_clock_probe+0x238/0x7b8
platform_drv_probe+0x6c/0xc8
really_probe+0x14c/0x418
driver_probe_device+0x74/0x130
__device_attach_driver+0xc4/0xe8
bus_for_each_drv+0xec/0x150
__device_attach+0x160/0x1d8
device_initial_probe+0x10/0x18
bus_probe_device+0xe0/0xf0
device_add+0x528/0x950
of_device_add+0x5c/0x80
of_platform_device_create_pdata+0x120/0x168
of_platform_bus_create+0x244/0x4e0
of_platform_populate+0x50/0xe8
zynqmp_firmware_probe+0x370/0x3a8
platform_drv_probe+0x6c/0xc8
really_probe+0x14c/0x418
driver_probe_device+0x74/0x130
device_driver_attach+0x94/0xa0
__driver_attach+0x70/0x108
bus_for_each_dev+0xe4/0x158
driver_attach+0x30/0x40
bus_add_driver+0x21c/0x2b8
driver_register+0xbc/0x1d0
__platform_driver_register+0x7c/0x88
zynqmp_firmware_driver_init+0x1c/0x24
do_one_initcall+0xa4/0x234
kernel_init_freeable+0x1b0/0x24c
kernel_init+0x10/0x110
ret_from_fork+0x10/0x18
The buggy address belongs to the page:
page:ffff0008f9be1c88 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
raw: 0008d00000000000 ffff0008f9be1c90 ffff0008f9be1c90 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff
page dumped because: kasan: bad access detected
addr ffff0008c89a7410 is located in stack of task swapper/0/1 at offset 112 in frame:
zynqmp_clock_probe+0x0/0x7b8
this frame has 3 objects:
[32, 44) 'response'
[64, 80) 'ret_payload'
[96, 112) 'name'
Memory state around the buggy address:
ffff0008c89a7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff0008c89a7380: 00 00 00 00 f1 f1 f1 f1 00 04 f2 f2 00 00 f2 f2
>ffff0008c89a7400: 00 00 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
^
ffff0008c89a7480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff0008c89a7500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
================================================================== |
| In the Linux kernel, the following vulnerability has been resolved:
rcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle()
The rcuscale.holdoff module parameter can be used to delay the start
of rcu_scale_writer() kthread. However, the hung-task timeout will
trigger when the timeout specified by rcuscale.holdoff is greater than
hung_task_timeout_secs:
runqemu kvm nographic slirp qemuparams="-smp 4 -m 2048M"
bootparams="rcuscale.shutdown=0 rcuscale.holdoff=300"
[ 247.071753] INFO: task rcu_scale_write:59 blocked for more than 122 seconds.
[ 247.072529] Not tainted 6.4.0-rc1-00134-gb9ed6de8d4ff #7
[ 247.073400] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 247.074331] task:rcu_scale_write state:D stack:30144 pid:59 ppid:2 flags:0x00004000
[ 247.075346] Call Trace:
[ 247.075660] <TASK>
[ 247.075965] __schedule+0x635/0x1280
[ 247.076448] ? __pfx___schedule+0x10/0x10
[ 247.076967] ? schedule_timeout+0x2dc/0x4d0
[ 247.077471] ? __pfx_lock_release+0x10/0x10
[ 247.078018] ? enqueue_timer+0xe2/0x220
[ 247.078522] schedule+0x84/0x120
[ 247.078957] schedule_timeout+0x2e1/0x4d0
[ 247.079447] ? __pfx_schedule_timeout+0x10/0x10
[ 247.080032] ? __pfx_rcu_scale_writer+0x10/0x10
[ 247.080591] ? __pfx_process_timeout+0x10/0x10
[ 247.081163] ? __pfx_sched_set_fifo_low+0x10/0x10
[ 247.081760] ? __pfx_rcu_scale_writer+0x10/0x10
[ 247.082287] rcu_scale_writer+0x6b1/0x7f0
[ 247.082773] ? mark_held_locks+0x29/0xa0
[ 247.083252] ? __pfx_rcu_scale_writer+0x10/0x10
[ 247.083865] ? __pfx_rcu_scale_writer+0x10/0x10
[ 247.084412] kthread+0x179/0x1c0
[ 247.084759] ? __pfx_kthread+0x10/0x10
[ 247.085098] ret_from_fork+0x2c/0x50
[ 247.085433] </TASK>
This commit therefore replaces schedule_timeout_uninterruptible() with
schedule_timeout_idle(). |
