general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
CPU: 0 PID: 623 Comm: ext4lazyinit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__ext4_journal_get_write_access+0xad/0x6c0 fs/ext4/ext4_jbd2.c:231
Code: 8c ff 49 8d 5e 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 f1 e0 d1 ff 48 8b 1b 48 83 c3 38 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 d4 e0 d1 ff 4c 8b 23 4d 85 e4 4c
RSP: 0018:ffffc90012347bc0 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000038 RCX: ffff88811ef45100
RDX: 0000000000000000 RSI: 000000000000063e RDI: ffffffff865fa025
RBP: ffffc90012347c90 R08: ffff88813e02d9d8 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1022bcc3e5 R12: ffff888111ed4028
R13: dffffc0000000000 R14: ffff88813e02d9d8 R15: 1ffff92002468f80
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f6f3b8000 CR3: 0000000132dc0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000000000af
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_init_inode_table+0x401/0x7c0 fs/ext4/ialloc.c:1597
 ext4_run_li_request fs/ext4/super.c:3676 [inline]
 ext4_lazyinit_thread+0x673/0x1520 fs/ext4/super.c:3767
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ext4_journal_get_write_access+0xad/0x6c0 fs/ext4/ext4_jbd2.c:231
Code: 8c ff 49 8d 5e 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 f1 e0 d1 ff 48 8b 1b 48 83 c3 38 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 d4 e0 d1 ff 4c 8b 23 4d 85 e4 4c
RSP: 0018:ffffc90012347bc0 EFLAGS: 00010202
RAX: 0000000000000007 RBX: 0000000000000038 RCX: ffff88811ef45100
RDX: 0000000000000000 RSI: 000000000000063e RDI: ffffffff865fa025
RBP: ffffc90012347c90 R08: ffff88813e02d9d8 R09: 0000000000000001
R10: dffffc0000000000 R11: ffffed1022bcc3e5 R12: ffff888111ed4028
R13: dffffc0000000000 R14: ffff88813e02d9d8 R15: 1ffff92002468f80
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556033c4e8 CR3: 000000010fd99000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000000000af
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8c ff                	mov    %?,%edi
   2:	49 8d 5e 30          	lea    0x30(%r14),%rbx
   6:	48 89 d8             	mov    %rbx,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  12:	74 08                	je     0x1c
  14:	48 89 df             	mov    %rbx,%rdi
  17:	e8 f1 e0 d1 ff       	call   0xffd1e10d
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 83 c3 38          	add    $0x38,%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 d4 e0 d1 ff       	call   0xffd1e10d
  39:	4c 8b 23             	mov    (%rbx),%r12
  3c:	4d 85 e4             	test   %r12,%r12
  3f:	4c                   	rex.WR