Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 1070 Comm: kworker/1:1H Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:account_kernel_stack+0xe6/0x2e0 kernel/fork.c:546
Code: fb 08 0f 84 a1 01 00 00 e8 87 48 40 00 48 8b 44 24 08 80 38 00 0f 85 bf 01 00 00 49 8b 47 20 48 8d 2c d8 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 be 01 00 00 48 8b 6d 00 48 8d 7d 08 48 89 f8
RSP: 0018:ffffc900040b7d70 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888026fb5a00 RSI: ffffffff815906c9 RDI: ffff888026fb71e0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1004df6c78
R10: ffff888026fb63c3 R11: 0000000000000b8f R12: dffffc0000000000
R13: dffffc0000000000 R14: 1ffff11004db80f4 R15: ffff888026dc0780
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000996de000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 exit_task_stack_account+0x23/0xf0 kernel/fork.c:559
 do_exit+0x1c85/0x2d70 kernel/exit.c:979
 kthread_exit+0x57/0x70 kernel/kthread.c:316
 kthread+0x27c/0x3a0 kernel/kthread.c:391
 ret_from_fork+0x45/0x80 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:account_kernel_stack+0xe6/0x2e0 kernel/fork.c:546
Code: fb 08 0f 84 a1 01 00 00 e8 87 48 40 00 48 8b 44 24 08 80 38 00 0f 85 bf 01 00 00 49 8b 47 20 48 8d 2c d8 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 be 01 00 00 48 8b 6d 00 48 8d 7d 08 48 89 f8
RSP: 0018:ffffc900040b7d70 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888026fb5a00 RSI: ffffffff815906c9 RDI: ffff888026fb71e0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1004df6c78
R10: ffff888026fb63c3 R11: 0000000000000b8f R12: dffffc0000000000
R13: dffffc0000000000 R14: 1ffff11004db80f4 R15: ffff888026dc0780
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000996de000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	fb                   	sti
   1:	08 0f                	or     %cl,(%rdi)
   3:	84 a1 01 00 00 e8    	test   %ah,-0x17ffffff(%rcx)
   9:	87 48 40             	xchg   %ecx,0x40(%rax)
   c:	00 48 8b             	add    %cl,-0x75(%rax)
   f:	44 24 08             	rex.R and $0x8,%al
  12:	80 38 00             	cmpb   $0x0,(%rax)
  15:	0f 85 bf 01 00 00    	jne    0x1da
  1b:	49 8b 47 20          	mov    0x20(%r15),%rax
  1f:	48 8d 2c d8          	lea    (%rax,%rbx,8),%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	0f 85 be 01 00 00    	jne    0x1f3
  35:	48 8b 6d 00          	mov    0x0(%rbp),%rbp
  39:	48 8d 7d 08          	lea    0x8(%rbp),%rdi
  3d:	48 89 f8             	mov    %rdi,%rax