From: syzbot <syzbot+10257d01dd285b15170a@syzkaller.appspotmail.com>
To: davem@davemloft.net, edumazet@google.com,
krzysztof.kozlowski@linaro.org, kuba@kernel.org,
linma@zju.edu.cn, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, pabeni@redhat.com,
syzkaller-bugs@googlegroups.com
Subject: [syzbot] BUG: unable to handle kernel NULL pointer dereference in nci_cmd_timer
Date: Wed, 16 Nov 2022 02:52:37 -0800 [thread overview]
Message-ID: <00000000000055882e05ed9445a2@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 9500fc6e9e60 Merge branch 'for-next/core' into for-kernelci
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=16cbf7a5880000
kernel config: https://syzkaller.appspot.com/x/.config?x=b25c9f218686dd5e
dashboard link: https://syzkaller.appspot.com/bug?extid=10257d01dd285b15170a
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1354dce9880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10880a95880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/1363e60652f7/disk-9500fc6e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/fcc4da811bb6/vmlinux-9500fc6e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0b554298f1fa/Image-9500fc6e.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+10257d01dd285b15170a@syzkaller.appspotmail.com
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
ESR = 0x0000000096000004
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x04: level 0 translation fault
Data abort info:
ISV = 0, ISS = 0x00000004
CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=000000010c75b000
[0000000000000000] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.0-rc5-syzkaller-32269-g9500fc6e9e60 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 004000c5 (nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __queue_work+0x3c4/0x8b4
lr : __queue_work+0x3c4/0x8b4 kernel/workqueue.c:1458
sp : ffff800008003d60
x29: ffff800008003d60 x28: 0000000000000000 x27: ffff80000d3a9000
x26: ffff80000d3ad050 x25: ffff80000d2fe008 x24: ffff80000db54000
x23: 0000000000000000 x22: 0000000000000023 x21: ffff0000c7a95400
x20: 0000000000000008 x19: ffff0000cd0d20f8 x18: ffff80000db78158
x17: ffff80000ddda198 x16: ffff80000dc18158 x15: ffff80000d3cbc80
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff80000d3cbc80
x11: ff8080000c07dfe4 x10: 0000000000000000 x9 : ffff80000c07dfe4
x8 : ffff80000d3cbc80 x7 : ffff80000813bae8 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000000 x0 : ffff0000c0014c00
Call trace:
__queue_work+0x3c4/0x8b4 kernel/workqueue.c:1458
queue_work_on+0xb0/0x15c kernel/workqueue.c:1545
queue_work include/linux/workqueue.h:503 [inline]
nci_cmd_timer+0x30/0x40 net/nfc/nci/core.c:615
call_timer_fn+0x90/0x144 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers+0x280/0x374 kernel/time/timer.c:1790
run_timer_softirq+0x34/0x5c kernel/time/timer.c:1803
_stext+0x168/0x37c
____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
call_on_irq_stack+0x2c/0x54 arch/arm64/kernel/entry.S:892
do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84
invoke_softirq+0x70/0xbc kernel/softirq.c:452
__irq_exit_rcu+0xf0/0x140 kernel/softirq.c:650
irq_exit_rcu+0x10/0x40 kernel/softirq.c:662
__el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:486
el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:580
arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35
default_idle_call+0x48/0xb8 kernel/sched/idle.c:109
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x110/0x2d4 kernel/sched/idle.c:303
cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:400
kernel_init+0x0/0x290 init/main.c:729
start_kernel+0x0/0x620 init/main.c:890
start_kernel+0x450/0x620 init/main.c:1145
__primary_switched+0xb4/0xbc arch/arm64/kernel/head.S:471
Code: 94001384 aa0003f7 aa1303e0 9400144a (f94002f8)
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
0: 94001384 bl 0x4e10
4: aa0003f7 mov x23, x0
8: aa1303e0 mov x0, x19
c: 9400144a bl 0x5134
* 10: f94002f8 ldr x24, [x23] <-- trapping instruction
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2022-11-16 11:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-16 10:52 syzbot [this message]
2022-11-16 13:11 ` [syzbot] BUG: unable to handle kernel NULL pointer dereference in nci_cmd_timer Lin Ma
2022-11-16 18:17 ` syzbot
2022-11-30 9:28 ` Dmitry Vyukov
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