workqueue: max_active 2097158 requested for btrfs-scrubwrc is out of range, clamping between 1 and 512
workqueue: max_active 2097158 requested for btrfs-scrubparity is out of range, clamping between 1 and 512
BTRFS info (device loop0: state C): scrub: started on devid 1
general protection fault, probably for non-canonical address 0xdffffc0000000041: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000208-0x000000000000020f]
CPU: 1 PID: 6881 Comm: syz.0.510 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:btrfs_lookup_csums_range+0xc3/0x10e0 fs/btrfs/file-item.c:518
Code: f2 00 00 f3 f3 48 89 4c 24 60 4a 89 44 21 08 e8 33 1b 22 fe 4c 89 bc 24 88 00 00 00 49 81 c7 08 02 00 00 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 8e 37 72 fe 49 8b 07 48 89 44 24
RSP: 0018:ffffc900057270e0 EFLAGS: 00010206
RAX: 0000000000000041 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc9000c569000 RSI: 000000000001426a RDI: 000000000001426b
RBP: ffffc90005727250 R08: 0000000000000001 R09: 0000000000000000
R10: fffff52000ae4e3a R11: 1ffff92000ae4e38 R12: dffffc0000000000
R13: ffffc900057271e0 R14: 0000000000000000 R15: 0000000000000208
FS:  00007f62f5a676c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe8acd515ba CR3: 000000002ed67000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 scrub_simple_mirror+0x873/0x16b0 fs/btrfs/scrub.c:3481
 scrub_stripe+0xa08/0x1950 fs/btrfs/scrub.c:3666
 scrub_chunk+0x36a/0x430 fs/btrfs/scrub.c:3801
 scrub_enumerate_chunks+0xb4b/0x1680 fs/btrfs/scrub.c:4070
 btrfs_scrub_dev+0x7d2/0x1180 fs/btrfs/scrub.c:4411
 btrfs_ioctl_scrub+0x225/0x350 fs/btrfs/ioctl.c:4109
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f62f4b8eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f62f5a67038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f62f4db5fa0 RCX: 00007f62f4b8eb69
RDX: 0000200000000000 RSI: 00000000c400941b RDI: 0000000000000005
RBP: 00007f62f4c11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f62f4db5fa0 R15: 00007ffe3c080e98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btrfs_lookup_csums_range+0xc3/0x10e0 fs/btrfs/file-item.c:518
Code: f2 00 00 f3 f3 48 89 4c 24 60 4a 89 44 21 08 e8 33 1b 22 fe 4c 89 bc 24 88 00 00 00 49 81 c7 08 02 00 00 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 8e 37 72 fe 49 8b 07 48 89 44 24
RSP: 0018:ffffc900057270e0 EFLAGS: 00010206
RAX: 0000000000000041 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc9000c569000 RSI: 000000000001426a RDI: 000000000001426b
RBP: ffffc90005727250 R08: 0000000000000001 R09: 0000000000000000
R10: fffff52000ae4e3a R11: 1ffff92000ae4e38 R12: dffffc0000000000
R13: ffffc900057271e0 R14: 0000000000000000 R15: 0000000000000208
FS:  00007f62f5a676c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fda1e070000 CR3: 000000002ed67000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f2 00 00             	repnz add %al,(%rax)
   3:	f3 f3 48 89 4c 24 60 	repz xrelease mov %rcx,0x60(%rsp)
   a:	4a 89 44 21 08       	mov    %rax,0x8(%rcx,%r12,1)
   f:	e8 33 1b 22 fe       	call   0xfe221b47
  14:	4c 89 bc 24 88 00 00 	mov    %r15,0x88(%rsp)
  1b:	00
  1c:	49 81 c7 08 02 00 00 	add    $0x208,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 8e 37 72 fe       	call   0xfe7237c7
  39:	49 8b 07             	mov    (%r15),%rax
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24