CVE-2022-50062

Scores

EPSS

0.000none0.0%

0%20%40%60%80%100%

Percentile: 0.0%

Description

In the Linux kernel, the following vulnerability has been resolved: net: bgmac: Fix a BUG triggered by wrong bytes_compl On one of our machines we got: kernel BUG at lib/dynamic_queue_limits.c:27! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM CPU: 0 PID: 1166 Comm: irq/41-bgmac Tainted: G W O 4.14.275-rt132 #1 Hardware name: BRCM XGS iProc task: ee3415c0 task.stack: ee32a000 PC is at dql_completed+0x168/0x178 LR is at bgmac_poll+0x18c/0x6d8 pc : [] lr : [] psr: 800a0313 sp : ee32be14 ip : 000005ea fp : 00000bd4 r10: ee558500 r9 : c0116298 r8 : 00000002 r7 : 00000000 r6 : ef128810 r5 : 01993267 r4 : 01993851 r3 : ee558000 r2 : 000070e1 r1 : 00000bd4 r0 : ee52c180 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 12c5387d Table: 8e88c04a DAC: 00000051 Process irq/41-bgmac (pid: 1166, stack limit = 0xee32a210) Stack: (0xee32be14 to 0xee32c000) be00: ee558520 ee52c100 ef128810 be20: 00000000 00000002 c0116298 c04b5a18 00000000 c0a0c8c4 c0951780 00000040 be40: c0701780 ee558500 ee55d520 ef05b340 ef6f9780 ee558520 00000001 00000040 be60: ffffe000 c0a56878 ef6fa040 c0952040 0000012c c0528744 ef6f97b0 fffcfb6a be80: c0a04104 2eda8000 c0a0c4ec c0a0d368 ee32bf44 c0153534 ee32be98 ee32be98 bea0: ee32bea0 ee32bea0 ee32bea8 ee32bea8 00000000 c01462e4 ffffe000 ef6f22a8 bec0: ffffe000 00000008 ee32bee4 c0147430 ffffe000 c094a2a8 00000003 ffffe000 bee0: c0a54528 00208040 0000000c c0a0c8c4 c0a65980 c0124d3c 00000008 ee558520 bf00: c094a23c c0a02080 00000000 c07a9910 ef136970 ef136970 ee30a440 ef136900 bf20: ee30a440 00000001 ef136900 ee30a440 c016d990 00000000 c0108db0 c012500c bf40: ef136900 c016da14 ee30a464 ffffe000 00000001 c016dd14 00000000 c016db28 bf60: ffffe000 ee21a080 ee30a400 00000000 ee32a000 ee30a440 c016dbfc ee25fd70 bf80: ee21a09c c013edcc ee32a000 ee30a400 c013ec7c 00000000 00000000 00000000 bfa0: 00000000 00000000 00000000 c0108470 00000000 00000000 00000000 00000000 bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 from from from from from from from from Code: a83f15e0 0200001a 0630a0e1 c3ffffea (f201f0e7) The issue seems similar to commit 90b3b339364c (“net: hisilicon: Fix a BUG trigered by wrong bytes_compl”) and potentially introduced by commit b38c83dd0866 (“bgmac: simplify tx ring index handling”). If there is an RX interrupt between setting ring->end and netdev_sent_queue() we can hit the BUG_ON as bgmac_dma_tx_free() can miscalculate the queue size while called from bgmac_poll(). The machine which triggered the BUG runs a v4.14 RT kernel - but the issue seems present in mainline too.

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Sources

astradebianubuntu

Reference Links

https://www.cve.org/CVERecord?id=CVE-2022-50062

https://git.kernel.org/stable/c/1b7680c6c1f6de9904f1d9b05c952f0c64a03350

https://git.kernel.org/stable/c/ab2b55bb25db289ba0b68e3d58494476bdb1041d

https://git.kernel.org/stable/c/ac6d4482f29ab992b605c1b4bd1347f1f679f4e4

https://git.kernel.org/stable/c/c506c9a97120f43257e9b3ce7b1f9a24eafc3787

https://git.kernel.org/stable/c/da1421a29d3b8681ba6a7f686bd0b40dda5acaf3

Vulnerable Software (164)

Type: Configuration

Product: linux

Operating System: astra 4.7.0

Trait:

{  "unaffected": true}

Source: astra

Type: Configuration

Product: linux

Operating System: ubuntu bionic 18.04

Trait:

{  "unfixed": true}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu focal 20.04

Trait:

{  "fixed": "5.4.0-132.148"}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu jammy 22.04

Trait:

{  "fixed": "5.15.0-53.59"}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu trusty 14.04

Trait:

{  "unaffected": true}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: ubuntu xenial 16.04

Trait:

{  "unfixed": true}

Source: ubuntu

Type: Configuration

Product: linux

Operating System: debian

Trait:

{  "fixed": "6.0.2-1"}

Source: debian

Type: Configuration

Product: linux

Operating System: debian bullseye 11

Trait:

{  "fixed": "5.10.140-1"}

Source: debian

Type: Configuration

Product: linux-5.10

Operating System: astra 4.7.0

Trait:

{  "unaffected": true}

Source: astra

Type: Configuration

Product: linux-allwinner-5.19

Operating System: ubuntu jammy 22.04

Trait:

{  "unfixed": true}

Source: ubuntu