[syzbot] KASAN: slab-out-of-bounds Read in riscv_intc_irq

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    0d7588ab riscv: process: Fix no prototype for arch_dup_tas..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes
console output: https://syzkaller.appspot.com/x/log.txt?x=15a35756d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=81c0b708b31626cc
dashboard link: https://syzkaller.appspot.com/bug?extid=005654dd9b8f26bd4c07
userspace arch: riscv64

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+005654dd9b8f26bd4c07 at syzkaller.appspotmail.com

==================================================================
BUG: KASAN: slab-out-of-bounds in riscv_intc_irq+0x24/0xcc drivers/irqchip/irq-riscv-intc.c:24
Read of size 8 at addr ffffffe00c963bd0 by task kworker/1:1/4388

CPU: 1 PID: 4388 Comm: kworker/1:1 Not tainted 5.12.0-rc2-syzkaller-00467-g0d7588ab9ef9 #0
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events nsim_dev_trap_report_work
Call Trace:
[<ffffffe0000096c0>] walk_stackframe+0x0/0x23c arch/riscv/kernel/traps.c:201

Allocated by task 76347056:
(stack is not available)

Last potentially related work creation:


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