Re: [BUG] KASAN: slab-use-after-free Read in irq_migrate_all_off_this_cpu

[Thomas Gleixner]

On Sat, Aug 29 2026 at 16:34, Radu Rendec wrote:
> On Thu, 2026-08-27 at 22:41 -0700, Farhad Alemi wrote:
>>   BUG: KASAN: slab-out-of-bounds in
>> irq_migrate_all_off_this_cpu+0xdf/0xc80 kernel/irq/cpuhotplug.c:181
>
> Thanks for reporting this. For everyone interested, please note that it
> had been also reported by syzbot a few days before:
> https://lore.kernel.org/all/6a8c23a0.dbb3a75c.7844.0001.GAE@xxxxxxxxxx/
> Currently there is no follow up to the syzbot report.

The syzbot report is useless. It mumbles about memory allocated in the
networking stack which definitely can't end up in the interrupt
descriptor :)

>> Our reproducer.c is available upon request.

See further down the thread :)