Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 UID: 0 PID: 14744 Comm: md0_raid5 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:ppl_write_stripe_run+0x5d/0x1580 drivers/md/raid5-ppl.c:538
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 9c 97 30 fa 48 8b 03 49 89 c6 48 8d 50 10 48 89 d0 48 c1 e8 03 48 89 84 24 b0 00 00 00 <42> 0f b6 04 38 84 c0 48 89 54 24 50 0f 85 e4 14 00 00 8b 1a 31 ff
RSP: 0018:ffffc900055a7848 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff88823bfaed80 RCX: ffff8880325d3e80
RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900055a7a70 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100cace806 R12: 00000000ffffffff
R13: ffff88823bfae498 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125cc4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8074f45e9c CR3: 0000000034d68000 CR4: 00000000003526f0
DR0: 0000000000000009 DR1: 00000000000000c9 DR2: 00000000000000f3
DR3: 00000000000000c0 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 log_flush_stripe_to_raid drivers/md/raid5-log.h:101 [inline]
 handle_active_stripes+0x127c/0x1290 drivers/md/raid5.c:6851
 raid5d+0x154d/0x18b0 drivers/md/raid5.c:6985
 md_thread+0x287/0x560 drivers/md/md.c:8706
 kthread+0x38b/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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:ppl_write_stripe_run+0x5d/0x1580 drivers/md/raid5-ppl.c:538
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 9c 97 30 fa 48 8b 03 49 89 c6 48 8d 50 10 48 89 d0 48 c1 e8 03 48 89 84 24 b0 00 00 00 <42> 0f b6 04 38 84 c0 48 89 54 24 50 0f 85 e4 14 00 00 8b 1a 31 ff
RSP: 0018:ffffc900055a7848 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff88823bfaed80 RCX: ffff8880325d3e80
RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900055a7a70 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100cace806 R12: 00000000ffffffff
R13: ffff88823bfae498 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125cc4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8074f45e9c CR3: 0000000028ab0000 CR4: 00000000003526f0
DR0: 0000000000000009 DR1: 00000000000000c9 DR2: 00000000000000f3
DR3: 00000000000000c0 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 03 42 80 3c       	call   0x3c804208
   5:	38 00                	cmp    %al,(%rax)
   7:	74 08                	je     0x11
   9:	48 89 df             	mov    %rbx,%rdi
   c:	e8 9c 97 30 fa       	call   0xfa3097ad
  11:	48 8b 03             	mov    (%rbx),%rax
  14:	49 89 c6             	mov    %rax,%r14
  17:	48 8d 50 10          	lea    0x10(%rax),%rdx
  1b:	48 89 d0             	mov    %rdx,%rax
  1e:	48 c1 e8 03          	shr    $0x3,%rax
  22:	48 89 84 24 b0 00 00 	mov    %rax,0xb0(%rsp)
  29:	00
* 2a:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	48 89 54 24 50       	mov    %rdx,0x50(%rsp)
  36:	0f 85 e4 14 00 00    	jne    0x1520
  3c:	8b 1a                	mov    (%rdx),%ebx
  3e:	31 ff                	xor    %edi,%edi