general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 0 PID: 1673 Comm: udevd Not tainted 5.19.0-rc5-syzkaller-00187-ge8a4e1c1bb69 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
RIP: 0010:relay_switch_subbuf+0x20e/0x900 kernel/relay.c:676
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3d 06 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6d 68 49 8d 7d 50 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7a 06 00 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffffc9000512f178 EFLAGS: 00010016
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000000a RSI: ffffffff817b3d56 RDI: 0000000000000050
RBP: ffff888046b3d8f8 R08: 0000000000000006 R09: 0000000000000038
R10: 0000000000000044 R11: 0000000000000001 R12: 0000000000000040
R13: 0000000000000000 R14: ffff88807a394c00 R15: 0000000000000038
FS:  00007f4a1788f840(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f471579d090 CR3: 000000007bbcf000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 relay_reserve include/linux/relay.h:248 [inline]
 trace_note+0x5af/0x720 kernel/trace/blktrace.c:95
 trace_note_tsk kernel/trace/blktrace.c:126 [inline]
 __blk_add_trace+0xbfb/0xdf0 kernel/trace/blktrace.c:267
 blk_add_trace_bio+0x326/0x4f0 kernel/trace/blktrace.c:905
 trace_block_bio_queue include/trace/events/block.h:355 [inline]
 submit_bio_noacct+0x1404/0x1b30 block/blk-core.c:843
 submit_bio block/blk-core.c:901 [inline]
 submit_bio+0xd7/0x300 block/blk-core.c:873
 submit_bh_wbc+0x4bc/0x670 fs/buffer.c:3039
 submit_bh fs/buffer.c:3045 [inline]
 block_read_full_folio+0x724/0xa60 fs/buffer.c:2337
 do_read_cache_folio+0x281/0x760 mm/filemap.c:3524
 do_read_cache_page mm/filemap.c:3602 [inline]
 read_cache_page+0x59/0x2a0 mm/filemap.c:3611
 read_mapping_page include/linux/pagemap.h:759 [inline]
 read_part_sector+0xf6/0x920 block/partitions/core.c:715
 adfspart_check_ICS+0x9a/0x690 block/partitions/acorn.c:360
 check_partition block/partitions/core.c:147 [inline]
 blk_add_partitions block/partitions/core.c:600 [inline]
 bdev_disk_changed block/partitions/core.c:686 [inline]
 bdev_disk_changed+0x629/0xf60 block/partitions/core.c:653
 blkdev_get_whole+0x18a/0x2d0 block/bdev.c:686
 blkdev_get_by_dev.part.0+0x5ec/0xb90 block/bdev.c:823
 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:857
 blkdev_open+0x13c/0x2c0 block/fops.c:481
 do_dentry_open+0x4a1/0x11f0 fs/open.c:848
 do_open fs/namei.c:3520 [inline]
 path_openat+0x1c71/0x2910 fs/namei.c:3653
 do_filp_open+0x1aa/0x400 fs/namei.c:3680
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1278
 do_sys_open fs/open.c:1294 [inline]
 __do_sys_openat fs/open.c:1310 [inline]
 __se_sys_openat fs/open.c:1305 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1305
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f4a17525697
Code: 25 00 00 41 00 3d 00 00 41 00 74 37 64 8b 04 25 18 00 00 00 85 c0 75 5b 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 85 00 00 00 48 83 c4 68 5d 41 5c c3 0f 1f
RSP: 002b:00007ffd598d5670 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055bd9665cb60 RCX: 00007f4a17525697
RDX: 00000000000a0800 RSI: 000055bd966885a0 RDI: 00000000ffffff9c
RBP: 000055bd966885a0 R08: 00000000ffffffff R09: 00007ffd599ac080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000055bd96662df0 R14: 00007ffd598d571c R15: 000055bd96652910
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:relay_switch_subbuf+0x20e/0x900 kernel/relay.c:676
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3d 06 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6d 68 49 8d 7d 50 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 7a 06 00 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffffc9000512f178 EFLAGS: 00010016
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000000a RSI: ffffffff817b3d56 RDI: 0000000000000050
RBP: ffff888046b3d8f8 R08: 0000000000000006 R09: 0000000000000038
R10: 0000000000000044 R11: 0000000000000001 R12: 0000000000000040
R13: 0000000000000000 R14: ffff88807a394c00 R15: 0000000000000038
FS:  00007f4a1788f840(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f471579d090 CR3: 000000007bbcf000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 3d 06 00 00    	jne    0x64e
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df
  1b:	4c 8b 6d 68          	mov    0x68(%rbp),%r13
  1f:	49 8d 7d 50          	lea    0x50(%r13),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 7a 06 00 00    	jne    0x6ae
  34:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  3b:	fc ff df
  3e:	49                   	rex.WB
  3f:	8b                   	.byte 0x8b