syzbot


BUG: unable to handle kernel NULL pointer dereference in rcu_core_si

Status: auto-obsoleted due to no activity on 2023/05/01 17:13
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+350812017a279cb3ceb5@syzkaller.appspotmail.com
First crash: 447d, last: 447d

Sample crash report:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000086000005
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=0000000122e6b000
[0000000000000000] pgd=080000012afc7003, p4d=080000012afc7003, pud=0000000000000000
Internal error: Oops: 0000000086000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 6.2.0-rc6-syzkaller-17530-gf57a12aa375c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : rcu_do_batch kernel/rcu/tree.c:2246 [inline]
lr : rcu_core+0x3f4/0x9f4 kernel/rcu/tree.c:2506
sp : ffff80000f4a3cd0
x29: ffff80000f4a3d10 x28: 000000000000000a x27: ffff0000c0338008
x26: 0000000000000000 x25: ffff0000c9833df0 x24: 0000000000000001
x23: ffff80000d6455f0 x22: ffff80000c15fd10 x21: ffff0000c0338000
x20: ffff80000d51c000 x19: ffff0001feff10c0 x18: 00000000000000e7
x17: ffff80000c15e8bc x16: ffff80000dd87118 x15: ffff0000c0338000
x14: 0000000000000018 x13: 0000000000000001 x12: ffff0000c0338000
x11: ff808000095ec85c x10: 0000000000000000 x9 : f72340736d2d6d00
x8 : 0000000000000000 x7 : ffff8000081fd734 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : ffff80000cd3a628 x0 : ffff0000c9833df0
Call trace:
 0x0
 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2523
 _stext+0x164/0x34c
 run_ksoftirqd+0x40/0x108 kernel/softirq.c:934
 smpboot_thread_fn+0x248/0x3ec kernel/smpboot.c:164
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Code: ???????? ???????? ???????? ???????? (????????) 
---[ end trace 0000000000000000 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/01/31 17:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f57a12aa375c 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 BUG: unable to handle kernel NULL pointer dereference in rcu_core_si
* Struck through repros no longer work on HEAD.