Race Condition Affecting kernel-rt-devel package, versions *

Note: Versions mentioned in the description apply only to the upstream kernel-rt-devel package and not the kernel-rt-devel package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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

RDMA/irdma: Fix KASAN issue with tasklet

KASAN testing revealed the following issue assocated with freeing an IRQ.

[50006.466686] Call Trace: [50006.466691] <IRQ> [50006.489538] dump_stack+0x5c/0x80 [50006.493475] print_address_description.constprop.6+0x1a/0x150 [50006.499872] ? irdma_sc_process_ceq+0x483/0x790 [irdma] [50006.505742] ? irdma_sc_process_ceq+0x483/0x790 [irdma] [50006.511644] kasan_report.cold.11+0x7f/0x118 [50006.516572] ? irdma_sc_process_ceq+0x483/0x790 [irdma] [50006.522473] irdma_sc_process_ceq+0x483/0x790 [irdma] [50006.528232] irdma_process_ceq+0xb2/0x400 [irdma] [50006.533601] ? irdma_hw_flush_wqes_callback+0x370/0x370 [irdma] [50006.540298] irdma_ceq_dpc+0x44/0x100 [irdma] [50006.545306] tasklet_action_common.isra.14+0x148/0x2c0 [50006.551096] __do_softirq+0x1d0/0xaf8 [50006.555396] irq_exit_rcu+0x219/0x260 [50006.559670] irq_exit+0xa/0x20 [50006.563320] smp_apic_timer_interrupt+0x1bf/0x690 [50006.568645] apic_timer_interrupt+0xf/0x20 [50006.573341] </IRQ>

The issue is that a tasklet could be pending on another core racing the delete of the irq.

Fix by insuring any scheduled tasklet is killed after deleting the irq.

• https://access.redhat.com/security/cve/CVE-2024-26838
• https://git.kernel.org/stable/c/0ae8ad0013978f7471f22bcf45b027393e87f5dc
• https://git.kernel.org/stable/c/635d79aa477f9912e602feb5498bdd51fb9cb824
• https://git.kernel.org/stable/c/b2e4a5266e3d133b4c7f0e43bf40d13ce14fd1aa
• https://git.kernel.org/stable/c/bd97cea7b18a0a553773af806dfbfac27a7c4acb
• https://git.kernel.org/stable/c/c6f1ca235f68b22b3e691b2ea87ac285e5946848