5.5

CVE-2022-49960

drm/i915: fix null pointer dereference

In the Linux kernel, the following vulnerability has been resolved:

drm/i915: fix null pointer dereference

Asus chromebook CX550 crashes during boot on v5.17-rc1 kernel.
The root cause is null pointer defeference of bi_next
in tgl_get_bw_info() in drivers/gpu/drm/i915/display/intel_bw.c.

BUG: kernel NULL pointer dereference, address: 000000000000002e
PGD 0 P4D 0
Oops: 0002 [#1] PREEMPT SMP NOPTI
CPU: 0 PID: 1 Comm: swapper/0 Tainted: G     U            5.17.0-rc1
Hardware name: Google Delbin/Delbin, BIOS Google_Delbin.13672.156.3 05/14/2021
RIP: 0010:tgl_get_bw_info+0x2de/0x510
...
[    2.554467] Call Trace:
[    2.554467]  <TASK>
[    2.554467]  intel_bw_init_hw+0x14a/0x434
[    2.554467]  ? _printk+0x59/0x73
[    2.554467]  ? _dev_err+0x77/0x91
[    2.554467]  i915_driver_hw_probe+0x329/0x33e
[    2.554467]  i915_driver_probe+0x4c8/0x638
[    2.554467]  i915_pci_probe+0xf8/0x14e
[    2.554467]  ? _raw_spin_unlock_irqrestore+0x12/0x2c
[    2.554467]  pci_device_probe+0xaa/0x142
[    2.554467]  really_probe+0x13f/0x2f4
[    2.554467]  __driver_probe_device+0x9e/0xd3
[    2.554467]  driver_probe_device+0x24/0x7c
[    2.554467]  __driver_attach+0xba/0xcf
[    2.554467]  ? driver_attach+0x1f/0x1f
[    2.554467]  bus_for_each_dev+0x8c/0xc0
[    2.554467]  bus_add_driver+0x11b/0x1f7
[    2.554467]  driver_register+0x60/0xea
[    2.554467]  ? mipi_dsi_bus_init+0x16/0x16
[    2.554467]  i915_init+0x2c/0xb9
[    2.554467]  ? mipi_dsi_bus_init+0x16/0x16
[    2.554467]  do_one_initcall+0x12e/0x2b3
[    2.554467]  do_initcall_level+0xd6/0xf3
[    2.554467]  do_initcalls+0x4e/0x79
[    2.554467]  kernel_init_freeable+0xed/0x14d
[    2.554467]  ? rest_init+0xc1/0xc1
[    2.554467]  kernel_init+0x1a/0x120
[    2.554467]  ret_from_fork+0x1f/0x30
[    2.554467]  </TASK>
...
Kernel panic - not syncing: Fatal exception

(cherry picked from commit c247cd03898c4c43c3bce6d4014730403bc13032)
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.17 < 5.19.8
Linux ≫ Linux Kernel Version 6.0 Update rc1
Linux ≫ Linux Kernel Version 6.0 Update rc2
Linux ≫ Linux Kernel Version 6.0 Update rc3
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.14% 0.037
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/c2798203315f4729bab0b917bf4c17a159abf9f8
Patch
https://git.kernel.org/stable/c/458ec0c8f35963626ccd51c3d50b752de5f1b9d4
Patch