Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 5172 Comm: jbd2/sda1-8 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:bio_init block/bio.c:214 [inline]
RIP: 0010:bio_init_inline include/linux/bio.h:435 [inline]
RIP: 0010:bio_alloc_bioset+0x67e/0xc30 block/bio.c:597
Code: 04 24 00 00 00 00 41 8d 46 ff 0f b7 d8 bf 04 00 00 00 89 de e8 33 6c 3c fd 66 83 fb 04 0f 83 db 00 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 c4 cf a5 fd 49 c7 07 00 00 00 00 49
RSP: 0018:ffffc9000e6ef7e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803778bd00 RSI: 0000000000000000 RDI: 0000000000000004
RBP: dffffc0000000000 R08: ffffffff903445f7 R09: 1ffffffff20688be
R10: dffffc0000000000 R11: fffffbfff20688bf R12: 0000000000092800
R13: ffffffff9a6ca840 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124ff3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f6b59c76f CR3: 000000007cd28000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bio_alloc include/linux/bio.h:373 [inline]
 submit_bh_wbc+0x22d/0x650 fs/buffer.c:2816
 jbd2_journal_commit_transaction+0x2186/0x5ad0 fs/jbd2/commit.c:726
 kjournald2+0x3e0/0x760 fs/jbd2/journal.c:201
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bio_init block/bio.c:214 [inline]
RIP: 0010:bio_init_inline include/linux/bio.h:435 [inline]
RIP: 0010:bio_alloc_bioset+0x67e/0xc30 block/bio.c:597
Code: 04 24 00 00 00 00 41 8d 46 ff 0f b7 d8 bf 04 00 00 00 89 de e8 33 6c 3c fd 66 83 fb 04 0f 83 db 00 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 ff e8 c4 cf a5 fd 49 c7 07 00 00 00 00 49
RSP: 0018:ffffc9000e6ef7e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88803778bd00 RSI: 0000000000000000 RDI: 0000000000000004
RBP: dffffc0000000000 R08: ffffffff903445f7 R09: 1ffffffff20688be
R10: dffffc0000000000 R11: fffffbfff20688bf R12: 0000000000092800
R13: ffffffff9a6ca840 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124ff3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f6b59c76f CR3: 000000007cd28000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	04 24                	add    $0x24,%al
   2:	00 00                	add    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	41 8d 46 ff          	lea    -0x1(%r14),%eax
   a:	0f b7 d8             	movzwl %ax,%ebx
   d:	bf 04 00 00 00       	mov    $0x4,%edi
  12:	89 de                	mov    %ebx,%esi
  14:	e8 33 6c 3c fd       	call   0xfd3c6c4c
  19:	66 83 fb 04          	cmp    $0x4,%bx
  1d:	0f 83 db 00 00 00    	jae    0xfe
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 c4 cf a5 fd       	call   0xfda5cffc
  38:	49 c7 07 00 00 00 00 	movq   $0x0,(%r15)
  3f:	49                   	rex.WB