Messages in this thread | | | Subject | Re: [syzbot] KASAN: slab-out-of-bounds Read in riscv_intc_irq | From | Kefeng Wang <> | Date | Thu, 18 Mar 2021 22:49:55 +0800 |
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On 2021/3/18 22:11, Dmitry Vyukov wrote: > On Thu, Mar 18, 2021 at 1:21 PM Kefeng Wang <wangkefeng.wang@huawei.com> wrote: >> On 2021/3/14 18:47, Dmitry Vyukov wrote: >>> On Sun, Mar 14, 2021 at 11:14 AM syzbot >>> <syzbot+005654dd9b8f26bd4c07@syzkaller.appspotmail.com> wrote: >>>> 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@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: >>> There seems to be some issue with riscv stack unwinder. >>> This does not have stacks. >> Hi, could you test with the following patch about the no stack >> issue(from v5.11-rc4), I made a mistake when do some cleanup... >> >> https://lore.kernel.org/linux-riscv/ce5b3533-b75d-c31c-4319-9d29769bbbd5@huawei.com/T/#t > Hi Kefeng, > > Please see: > http://bit.do/syzbot#no-custom-patches > > Is a unit-test for this possible? Fuzzing is not a replacement for unit testing.
ok, I mean that the issue about stack unwinder which may cause by my previous patch,
if some one want the stack back, it could try the bugfix.
> . >
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