BugZero | Cisco BugID CSCvh48223 - Kernel panic due to skb_under_panic (skbuff.c:146)

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BugZero | Cisco BugID CSCvh48223 - Kernel panic due to skb_under_panic (skbuff.c:146)

ODD
Cisco
CSCvh48223

Cisco - Defect ID: CSCvh48223

Kernel panic due to skb_under_panic (skbuff.c:146)

ODD
Cisco
CSCvh48223

Cisco - Defect ID: CSCvh48223

Kernel panic due to skb_under_panic (skbuff.c:146)

Last updated on May 3rd, 2023

BugZero Risk Score
7.8 High

Overall: 7.8

Severity: 8.2

Lifecycle: 9.1

Popularity: 4.6

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Bug Details

Description

Symptom

* Switch reloads due to kernel panic called by skb_under_panic()

Conditions

* During layer 3 to layer 2 address resolution, the data pointer in the skb_buff data structure is not reset properly * See, https://www.systutorials.com/linux-kernels/43785/net-fix-skb_under_panic-oops-in-neigh_resolve_output-linux-3-4-16/ for more detail * As a result, the SNMP daemon, on the switch, fails to append the layer 2 header to the packet and results in a kernel panic

Workaround

* The neighbour resolution function call, neigh_resolve_output(), is resolved in kernel version 3.4.16 * Upgrade to an ACI fixed release

Further Problem Description

Change history

2023-05-03 Added: 11.2(1m), 12.1(2g)

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.2(1m), 12.1(2g)

Fixed versions: 12.1(4a), 13.1(2m), 13.1(2o), 13.1(2p), 13.1(2q), 13.1(2s), 13.1(2t), 13.1(2u), 13.1(2v), 13.2(10e), 13.2(1l), 13.2(1m), 13.2(2l), 13.2(2o), 13.2(3i), 13.2(3n), 13.2(3o), 13.2(3r), 13.2(3s), 13.2(41d), 13.2(4d), 13.2(4e), 13.2(5d), 13.2(5e), 13.2(5f), 13.2(6i), 13.2(7f), 13.2(7k), 13.2(8d), 13.2(9b), 13.2(9f), 13.2(9h), 14.0(1h), 14.0(2c), 14.0(3c), 14.0(3d), 14.1(1i), 14.1(1j), 14.1(1k), 14.1(1l), 14.1(2g), 14.1(2m), 14.1(2o), 14.1(2s), 14.1(2u), 14.1(2w), 14.1(2x), 14.2(1i), 14.2(1j), 14.2(1l), 14.2(2e), 14.2(2f), 14.2(2g), 14.2(3j), 14.2(3l), 14.2(3n), 14.2(3q)

Relevant Products

Click on a version to see all relevant bugs

Affected versions:11.2(1m), 12.1(2g)

Fixed versions: 12.1(4a), 13.1(2m), 13.1(2o), 13.1(2p), 13.1(2q), 13.1(2s), 13.1(2t), 13.1(2u), 13.1(2v), 13.2(10e), 13.2(1l), 13.2(1m), 13.2(2l), 13.2(2o), 13.2(3i), 13.2(3n), 13.2(3o), 13.2(3r), 13.2(3s), 13.2(41d), 13.2(4d), 13.2(4e), 13.2(5d), 13.2(5e), 13.2(5f), 13.2(6i), 13.2(7f), 13.2(7k), 13.2(8d), 13.2(9b), 13.2(9f), 13.2(9h), 14.0(1h), 14.0(2c), 14.0(3c), 14.0(3d), 14.1(1i), 14.1(1j), 14.1(1k), 14.1(1l), 14.1(2g), 14.1(2m), 14.1(2o), 14.1(2s), 14.1(2u), 14.1(2w), 14.1(2x), 14.2(1i), 14.2(1j), 14.2(1l), 14.2(2e), 14.2(2f), 14.2(2g), 14.2(3j), 14.2(3l), 14.2(3n), 14.2(3q)

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