syzbot

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000030: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000180-0x0000000000000187]
CPU: 0 PID: 5182 Comm: kworker/0:8 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: rcu_gp srcu_invoke_callbacks
RIP: 0010:rcu_seq_current kernel/rcu/rcu.h:138 [inline]
RIP: 0010:srcu_invoke_callbacks+0x148/0x490 kernel/rcu/srcutree.c:1733
Code: 48 8b 5c 24 20 74 08 4c 89 f7 e8 63 b0 7f 00 48 8d 83 20 ff ff ff 48 89 44 24 30 bb 80 01 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 39 b0 7f 00 48 8b 33 4c 8b 74 24
RSP: 0018:ffffc90003dbfaa0 EFLAGS: 00010016
RAX: 0000000000000030 RBX: 0000000000000180 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffe8ffffc85318
RBP: ffffc90003dbfbb0 R08: 0000000000000003 R09: fffff520007b7f30
R10: dffffc0000000000 R11: fffff520007b7f30 R12: 1ffff920007b7f60
R13: dffffc0000000000 R14: ffff8880503842f8 R15: ffffe8ffffc85300
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000140 CR3: 0000000059786000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rcu_seq_current kernel/rcu/rcu.h:138 [inline]
RIP: 0010:srcu_invoke_callbacks+0x148/0x490 kernel/rcu/srcutree.c:1733
Code: 48 8b 5c 24 20 74 08 4c 89 f7 e8 63 b0 7f 00 48 8d 83 20 ff ff ff 48 89 44 24 30 bb 80 01 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 39 b0 7f 00 48 8b 33 4c 8b 74 24
RSP: 0018:ffffc90003dbfaa0 EFLAGS: 00010016
RAX: 0000000000000030 RBX: 0000000000000180 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffe8ffffc85318
RBP: ffffc90003dbfbb0 R08: 0000000000000003 R09: fffff520007b7f30
R10: dffffc0000000000 R11: fffff520007b7f30 R12: 1ffff920007b7f60
R13: dffffc0000000000 R14: ffff8880503842f8 R15: ffffe8ffffc85300
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000140 CR3: 0000000059786000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	48 8b 5c 24 20       	mov    0x20(%rsp),%rbx
   5:	74 08                	je     0xf
   7:	4c 89 f7             	mov    %r14,%rdi
   a:	e8 63 b0 7f 00       	call   0x7fb072
   f:	48 8d 83 20 ff ff ff 	lea    -0xe0(%rbx),%rax
  16:	48 89 44 24 30       	mov    %rax,0x30(%rsp)
  1b:	bb 80 01 00 00       	mov    $0x180,%ebx
  20:	49 03 1e             	add    (%r14),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 39 b0 7f 00       	call   0x7fb072
  39:	48 8b 33             	mov    (%rbx),%rsi
  3c:	4c                   	rex.WR
  3d:	8b                   	.byte 0x8b
  3e:	74 24                	je     0x64