Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix panic during interface removal Reference counting is used to ensure that batadv_hardif_neigh_node and batadv_hard_iface are not freed before/during batadv_v_elp_throughput_metric_update work is finished. But there isn't a guarantee that the hard if will remain associated with a soft interface up until the work is finished. This fixes a crash triggered by reboot that looks like this: Call trace: batadv_v_mesh_free+0xd0/0x4dc [batman_adv] batadv_v_elp_throughput_metric_update+0x1c/0xa4 process_one_work+0x178/0x398 worker_thread+0x2e8/0x4d0 kthread+0xd8/0xdc ret_from_fork+0x10/0x20 (the batadv_v_mesh_free call is misleading, and does not actually happen) I was able to make the issue happen more reliably by changing hardif_neigh->bat_v.metric_work work to be delayed work. This allowed me to track down and confirm the fix. [sven@narfation.org: prevent entering batadv_v_elp_get_throughput without soft_iface]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
c833484e5f3872a38fe232c663586069d5ad9645 to < 167422a07096a6006599067c8b55884064fa0b72affectedc833484e5f3872a38fe232c663586069d5ad9645 to < ce3f1545bf8fa28bd05ec113679e8e6cd23af577affectedc833484e5f3872a38fe232c663586069d5ad9645 to < f0a16c6c79768180333f3e41ce63f32730e3c3afaffectedc833484e5f3872a38fe232c663586069d5ad9645 to < 7eb5dd201695645af071592a50026eb780081a72affectedc833484e5f3872a38fe232c663586069d5ad9645 to < 072b2787321903287a126c148e8db87dd7ef96feaffectedc833484e5f3872a38fe232c663586069d5ad9645 to < 2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7affectedc833484e5f3872a38fe232c663586069d5ad9645 to < 522b1596ea19e327853804da2de60aeb9c5d6f42affectedc833484e5f3872a38fe232c663586069d5ad9645 to < ccb7276a6d26d6f8416e315b43b45e15ee7f29e2affected
Linux Linux
Default version status: affected
4.6affected0 to < 4.6unaffected5.4.291 to ≤ 5.4.*unaffected5.10.235 to ≤ 5.10.*unaffected5.15.179 to ≤ 5.15.*unaffected6.1.129 to ≤ 6.1.*unaffected6.6.79 to ≤ 6.6.*unaffected6.12.16 to ≤ 6.12.*unaffected6.13.4 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/167422a07096a6006599067c8b55884064fa0b72 ↗
- https://git.kernel.org/stable/c/ce3f1545bf8fa28bd05ec113679e8e6cd23af577 ↗
- https://git.kernel.org/stable/c/f0a16c6c79768180333f3e41ce63f32730e3c3af ↗
- https://git.kernel.org/stable/c/7eb5dd201695645af071592a50026eb780081a72 ↗
- https://git.kernel.org/stable/c/072b2787321903287a126c148e8db87dd7ef96fe ↗
- https://git.kernel.org/stable/c/2c3fb7df4cc6d043f70d4a8a10f8b915bbfb75e7 ↗
- https://git.kernel.org/stable/c/522b1596ea19e327853804da2de60aeb9c5d6f42 ↗
- https://git.kernel.org/stable/c/ccb7276a6d26d6f8416e315b43b45e15ee7f29e2 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html ↗