CVE-2024-26838

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.