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Red Hat: CVE-2024-38544: kernel: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt (Multiple Advisories)

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Red Hat: CVE-2024-38544: kernel: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:H/Au:S/C:N/I:C/A:C)
Published
06/19/2024
Created
12/06/2024
Added
12/05/2024
Modified
12/05/2024

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt In rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the resp_pkts queue and then a decision is made whether to run the completer task inline or schedule it. Finally the skb is dereferenced to bump a 'hw' performance counter. This is wrong because if the completer task is already running in a separate thread it may have already processed the skb and freed it which can cause a seg fault.This has been observed infrequently in testing at high scale. This patch fixes this by changing the order of enqueuing the packet until after the counter is accessed.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2024-38544
  • RHSA-2024:5928
  • 查看数 713
  • 已创建
  • 最后回复

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