| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
Drivers: hv: util: Avoid accessing a ringbuffer not initialized yet
If the KVP (or VSS) daemon starts before the VMBus channel's ringbuffer is
fully initialized, we can hit the panic below:
hv_utils: Registering HyperV Utility Driver
hv_vmbus: registering driver hv_utils
...
BUG: kernel NULL pointer dereference, address: 0000000000000000
CPU: 44 UID: 0 PID: 2552 Comm: hv_kvp_daemon Tainted: G E 6.11.0-rc3+ #1
RIP: 0010:hv_pkt_iter_first+0x12/0xd0
Call Trace:
...
vmbus_recvpacket
hv_kvp_onchannelcallback
vmbus_on_event
tasklet_action_common
tasklet_action
handle_softirqs
irq_exit_rcu
sysvec_hyperv_stimer0
</IRQ>
<TASK>
asm_sysvec_hyperv_stimer0
...
kvp_register_done
hvt_op_read
vfs_read
ksys_read
__x64_sys_read
This can happen because the KVP/VSS channel callback can be invoked
even before the channel is fully opened:
1) as soon as hv_kvp_init() -> hvutil_transport_init() creates
/dev/vmbus/hv_kvp, the kvp daemon can open the device file immediately and
register itself to the driver by writing a message KVP_OP_REGISTER1 to the
file (which is handled by kvp_on_msg() ->kvp_handle_handshake()) and
reading the file for the driver's response, which is handled by
hvt_op_read(), which calls hvt->on_read(), i.e. kvp_register_done().
2) the problem with kvp_register_done() is that it can cause the
channel callback to be called even before the channel is fully opened,
and when the channel callback is starting to run, util_probe()->
vmbus_open() may have not initialized the ringbuffer yet, so the
callback can hit the panic of NULL pointer dereference.
To reproduce the panic consistently, we can add a "ssleep(10)" for KVP in
__vmbus_open(), just before the first hv_ringbuffer_init(), and then we
unload and reload the driver hv_utils, and run the daemon manually within
the 10 seconds.
Fix the panic by reordering the steps in util_probe() so the char dev
entry used by the KVP or VSS daemon is not created until after
vmbus_open() has completed. This reordering prevents the race condition
from happening. |
| iperf v3.17.1 was discovered to contain a segmentation violation via the iperf_exchange_parameters() function. |
| In the Linux kernel, the following vulnerability has been resolved:
xen/netfront: fix crash when removing device
When removing a netfront device directly after a suspend/resume cycle
it might happen that the queues have not been setup again, causing a
crash during the attempt to stop the queues another time.
Fix that by checking the queues are existing before trying to stop
them.
This is XSA-465 / CVE-2024-53240. |
| In the Linux kernel, the following vulnerability has been resolved:
unicode: Fix utf8_load() error path
utf8_load() requests the symbol "utf8_data_table" and then checks if the
requested UTF-8 version is supported. If it's unsupported, it tries to
put the data table using symbol_put(). If an unsupported version is
requested, symbol_put() fails like this:
kernel BUG at kernel/module/main.c:786!
RIP: 0010:__symbol_put+0x93/0xb0
Call Trace:
<TASK>
? __die_body.cold+0x19/0x27
? die+0x2e/0x50
? do_trap+0xca/0x110
? do_error_trap+0x65/0x80
? __symbol_put+0x93/0xb0
? exc_invalid_op+0x51/0x70
? __symbol_put+0x93/0xb0
? asm_exc_invalid_op+0x1a/0x20
? __pfx_cmp_name+0x10/0x10
? __symbol_put+0x93/0xb0
? __symbol_put+0x62/0xb0
utf8_load+0xf8/0x150
That happens because symbol_put() expects the unique string that
identify the symbol, instead of a pointer to the loaded symbol. Fix that
by using such string. |
| In the Linux kernel, the following vulnerability has been resolved:
cpufreq: CPPC: Fix possible null-ptr-deref for cpufreq_cpu_get_raw()
cpufreq_cpu_get_raw() may return NULL if the cpu is not in
policy->cpus cpu mask and it will cause null pointer dereference. |
| In the Linux kernel, the following vulnerability has been resolved:
cpufreq: CPPC: Fix possible null-ptr-deref for cppc_get_cpu_cost()
cpufreq_cpu_get_raw() may return NULL if the cpu is not in
policy->cpus cpu mask and it will cause null pointer dereference,
so check NULL for cppc_get_cpu_cost(). |
| In the Linux kernel, the following vulnerability has been resolved:
RDMA/hns: Fix NULL pointer derefernce in hns_roce_map_mr_sg()
ib_map_mr_sg() allows ULPs to specify NULL as the sg_offset argument.
The driver needs to check whether it is a NULL pointer before
dereferencing it. |
| In the Linux kernel, the following vulnerability has been resolved:
NFSD: Prevent NULL dereference in nfsd4_process_cb_update()
@ses is initialized to NULL. If __nfsd4_find_backchannel() finds no
available backchannel session, setup_callback_client() will try to
dereference @ses and segfault. |
| In the Linux kernel, the following vulnerability has been resolved:
ALSA: pcm: Add sanity NULL check for the default mmap fault handler
A driver might allow the mmap access before initializing its
runtime->dma_area properly. Add a proper NULL check before passing to
virt_to_page() for avoiding a panic. |
| In the Linux kernel, the following vulnerability has been resolved:
firmware: arm_scpi: Check the DVFS OPP count returned by the firmware
Fix a kernel crash with the below call trace when the SCPI firmware
returns OPP count of zero.
dvfs_info.opp_count may be zero on some platforms during the reboot
test, and the kernel will crash after dereferencing the pointer to
kcalloc(info->count, sizeof(*opp), GFP_KERNEL).
| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000028
| Mem abort info:
| ESR = 0x96000004
| Exception class = DABT (current EL), IL = 32 bits
| SET = 0, FnV = 0
| EA = 0, S1PTW = 0
| Data abort info:
| ISV = 0, ISS = 0x00000004
| CM = 0, WnR = 0
| user pgtable: 4k pages, 48-bit VAs, pgdp = 00000000faefa08c
| [0000000000000028] pgd=0000000000000000
| Internal error: Oops: 96000004 [#1] SMP
| scpi-hwmon: probe of PHYT000D:00 failed with error -110
| Process systemd-udevd (pid: 1701, stack limit = 0x00000000aaede86c)
| CPU: 2 PID: 1701 Comm: systemd-udevd Not tainted 4.19.90+ #1
| Hardware name: PHYTIUM LTD Phytium FT2000/4/Phytium FT2000/4, BIOS
| pstate: 60000005 (nZCv daif -PAN -UAO)
| pc : scpi_dvfs_recalc_rate+0x40/0x58 [clk_scpi]
| lr : clk_register+0x438/0x720
| Call trace:
| scpi_dvfs_recalc_rate+0x40/0x58 [clk_scpi]
| devm_clk_hw_register+0x50/0xa0
| scpi_clk_ops_init.isra.2+0xa0/0x138 [clk_scpi]
| scpi_clocks_probe+0x528/0x70c [clk_scpi]
| platform_drv_probe+0x58/0xa8
| really_probe+0x260/0x3d0
| driver_probe_device+0x12c/0x148
| device_driver_attach+0x74/0x98
| __driver_attach+0xb4/0xe8
| bus_for_each_dev+0x88/0xe0
| driver_attach+0x30/0x40
| bus_add_driver+0x178/0x2b0
| driver_register+0x64/0x118
| __platform_driver_register+0x54/0x60
| scpi_clocks_driver_init+0x24/0x1000 [clk_scpi]
| do_one_initcall+0x54/0x220
| do_init_module+0x54/0x1c8
| load_module+0x14a4/0x1668
| __se_sys_finit_module+0xf8/0x110
| __arm64_sys_finit_module+0x24/0x30
| el0_svc_common+0x78/0x170
| el0_svc_handler+0x38/0x78
| el0_svc+0x8/0x340
| Code: 937d7c00 a94153f3 a8c27bfd f9400421 (b8606820)
| ---[ end trace 06feb22469d89fa8 ]---
| Kernel panic - not syncing: Fatal exception
| SMP: stopping secondary CPUs
| Kernel Offset: disabled
| CPU features: 0x10,a0002008
| Memory Limit: none |
| In the Linux kernel, the following vulnerability has been resolved:
clk: clk-apple-nco: Add NULL check in applnco_probe
Add NULL check in applnco_probe, to handle kernel NULL pointer
dereference error. |
| In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Don't call cleanup on profile rollback failure
When profile rollback fails in mlx5e_netdev_change_profile, the netdev
profile var is left set to NULL. Avoid a crash when unloading the driver
by not calling profile->cleanup in such a case.
This was encountered while testing, with the original trigger that
the wq rescuer thread creation got interrupted (presumably due to
Ctrl+C-ing modprobe), which gets converted to ENOMEM (-12) by
mlx5e_priv_init, the profile rollback also fails for the same reason
(signal still active) so the profile is left as NULL, leading to a crash
later in _mlx5e_remove.
[ 732.473932] mlx5_core 0000:08:00.1: E-Switch: Unload vfs: mode(OFFLOADS), nvfs(2), necvfs(0), active vports(2)
[ 734.525513] workqueue: Failed to create a rescuer kthread for wq "mlx5e": -EINTR
[ 734.557372] mlx5_core 0000:08:00.1: mlx5e_netdev_init_profile:6235:(pid 6086): mlx5e_priv_init failed, err=-12
[ 734.559187] mlx5_core 0000:08:00.1 eth3: mlx5e_netdev_change_profile: new profile init failed, -12
[ 734.560153] workqueue: Failed to create a rescuer kthread for wq "mlx5e": -EINTR
[ 734.589378] mlx5_core 0000:08:00.1: mlx5e_netdev_init_profile:6235:(pid 6086): mlx5e_priv_init failed, err=-12
[ 734.591136] mlx5_core 0000:08:00.1 eth3: mlx5e_netdev_change_profile: failed to rollback to orig profile, -12
[ 745.537492] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 745.538222] #PF: supervisor read access in kernel mode
<snipped>
[ 745.551290] Call Trace:
[ 745.551590] <TASK>
[ 745.551866] ? __die+0x20/0x60
[ 745.552218] ? page_fault_oops+0x150/0x400
[ 745.555307] ? exc_page_fault+0x79/0x240
[ 745.555729] ? asm_exc_page_fault+0x22/0x30
[ 745.556166] ? mlx5e_remove+0x6b/0xb0 [mlx5_core]
[ 745.556698] auxiliary_bus_remove+0x18/0x30
[ 745.557134] device_release_driver_internal+0x1df/0x240
[ 745.557654] bus_remove_device+0xd7/0x140
[ 745.558075] device_del+0x15b/0x3c0
[ 745.558456] mlx5_rescan_drivers_locked.part.0+0xb1/0x2f0 [mlx5_core]
[ 745.559112] mlx5_unregister_device+0x34/0x50 [mlx5_core]
[ 745.559686] mlx5_uninit_one+0x46/0xf0 [mlx5_core]
[ 745.560203] remove_one+0x4e/0xd0 [mlx5_core]
[ 745.560694] pci_device_remove+0x39/0xa0
[ 745.561112] device_release_driver_internal+0x1df/0x240
[ 745.561631] driver_detach+0x47/0x90
[ 745.562022] bus_remove_driver+0x84/0x100
[ 745.562444] pci_unregister_driver+0x3b/0x90
[ 745.562890] mlx5_cleanup+0xc/0x1b [mlx5_core]
[ 745.563415] __x64_sys_delete_module+0x14d/0x2f0
[ 745.563886] ? kmem_cache_free+0x1b0/0x460
[ 745.564313] ? lockdep_hardirqs_on_prepare+0xe2/0x190
[ 745.564825] do_syscall_64+0x6d/0x140
[ 745.565223] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 745.565725] RIP: 0033:0x7f1579b1288b |
| In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: avoid NULL pointer dereference
iwl_mvm_tx_skb_sta() and iwl_mvm_tx_mpdu() verify that the mvmvsta
pointer is not NULL.
It retrieves this pointer using iwl_mvm_sta_from_mac80211, which is
dereferencing the ieee80211_sta pointer.
If sta is NULL, iwl_mvm_sta_from_mac80211 will dereference a NULL
pointer.
Fix this by checking the sta pointer before retrieving the mvmsta
from it. If sta is not NULL, then mvmsta isn't either. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Add NULL check for clk_mgr and clk_mgr->funcs in dcn30_init_hw
This commit addresses a potential null pointer dereference issue in the
`dcn30_init_hw` function. The issue could occur when `dc->clk_mgr` or
`dc->clk_mgr->funcs` is null.
The fix adds a check to ensure `dc->clk_mgr` and `dc->clk_mgr->funcs` is
not null before accessing its functions. This prevents a potential null
pointer dereference.
Reported by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:789 dcn30_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 628) |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Add NULL check for clk_mgr in dcn32_init_hw
This commit addresses a potential null pointer dereference issue in the
`dcn32_init_hw` function. The issue could occur when `dc->clk_mgr` is
null.
The fix adds a check to ensure `dc->clk_mgr` is not null before
accessing its functions. This prevents a potential null pointer
dereference.
Reported by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn32/dcn32_hwseq.c:961 dcn32_init_hw() error: we previously assumed 'dc->clk_mgr' could be null (see line 782) |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Add NULL check for function pointer in dcn20_set_output_transfer_func
This commit adds a null check for the set_output_gamma function pointer
in the dcn20_set_output_transfer_func function. Previously,
set_output_gamma was being checked for null at line 1030, but then it
was being dereferenced without any null check at line 1048. This could
potentially lead to a null pointer dereference error if set_output_gamma
is null.
To fix this, we now ensure that set_output_gamma is not null before
dereferencing it. We do this by adding a null check for set_output_gamma
before the call to set_output_gamma at line 1048. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Add NULL check for function pointer in dcn32_set_output_transfer_func
This commit adds a null check for the set_output_gamma function pointer
in the dcn32_set_output_transfer_func function. Previously,
set_output_gamma was being checked for null, but then it was being
dereferenced without any null check. This could lead to a null pointer
dereference if set_output_gamma is null.
To fix this, we now ensure that set_output_gamma is not null before
dereferencing it. We do this by adding a null check for set_output_gamma
before the call to set_output_gamma. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Check null-initialized variables
[WHAT & HOW]
drr_timing and subvp_pipe are initialized to null and they are not
always assigned new values. It is necessary to check for null before
dereferencing.
This fixes 2 FORWARD_NULL issues reported by Coverity. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Check phantom_stream before it is used
dcn32_enable_phantom_stream can return null, so returned value
must be checked before used.
This fixes 1 NULL_RETURNS issue reported by Coverity. |
| In the Linux kernel, the following vulnerability has been resolved:
scsi: lpfc: Validate hdwq pointers before dereferencing in reset/errata paths
When the HBA is undergoing a reset or is handling an errata event, NULL ptr
dereference crashes may occur in routines such as
lpfc_sli_flush_io_rings(), lpfc_dev_loss_tmo_callbk(), or
lpfc_abort_handler().
Add NULL ptr checks before dereferencing hdwq pointers that may have been
freed due to operations colliding with a reset or errata event handler. |
