general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 0 PID: 26940 Comm: syz-executor.2 Not tainted 6.7.0-rc5-syzkaller-00047-g5bd7ef53ffe5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:bfs_move_block fs/bfs/file.c:42 [inline]
RIP: 0010:bfs_move_blocks fs/bfs/file.c:56 [inline]
RIP: 0010:bfs_get_block+0x88f/0xb90 fs/bfs/file.c:125
Code: b8 77 7f ff ff 21 c1 81 c9 08 80 00 00 4c 89 ef 4c 89 f6 8b 54 24 48 e8 3f d5 a4 ff 49 89 c5 48 8d 68 28 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 a3 24 84 ff 4c 8b 75 00 49 8d 7c 24
RSP: 0018:ffffc90003e4ed08 EFLAGS: 00010206
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: ffff88803d778000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000028 R08: ffffffff820b3a5f R09: 1ffffd400051c7c6
R10: dffffc0000000000 R11: fffff9400051c7c7 R12: ffff88808c889740
R13: 0000000000000000 R14: 000000000000006a R15: ffff888148d3abe8
FS:  00007f8431bda6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4ccc3fed58 CR3: 000000001d03e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __block_write_begin_int+0x54d/0x1ad0 fs/buffer.c:2119
 __block_write_begin fs/buffer.c:2168 [inline]
 block_write_begin+0x9b/0x1e0 fs/buffer.c:2227
 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:177
 generic_perform_write+0x31b/0x630 mm/filemap.c:3918
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4039
 __kernel_write_iter+0x306/0x720 fs/read_write.c:517
 __kernel_write+0x120/0x170 fs/read_write.c:537
 __dump_emit+0x236/0x360 fs/coredump.c:813
 elf_core_dump+0x3484/0x4540 fs/binfmt_elf.c:2056
 do_coredump+0x1b74/0x2ab0 fs/coredump.c:764
 get_signal+0x146a/0x1840 kernel/signal.c:2890
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x150 kernel/entry/common.c:204
 irqentry_exit_to_user_mode+0xa/0x50 kernel/entry/common.c:309
 exc_page_fault+0x57e/0x870 arch/x86/mm/fault.c:1564
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0xc0ecf24d38
Code: Unable to access opcode bytes at 0xc0ecf24d0e.
RSP: 002b:00000000200000d8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f8430f9bf80 RCX: 00007f8430e7cba9
RDX: 0000000020000180 RSI: 00000000200000d0 RDI: 0000000000800000
RBP: 00007f8430ec847a R08: 0000000020000200 R09: 0000000020000200
R10: 00000000200001c0 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8430f9bf80 R15: 00007ffcb10ac368
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bfs_move_block fs/bfs/file.c:42 [inline]
RIP: 0010:bfs_move_blocks fs/bfs/file.c:56 [inline]
RIP: 0010:bfs_get_block+0x88f/0xb90 fs/bfs/file.c:125
Code: b8 77 7f ff ff 21 c1 81 c9 08 80 00 00 4c 89 ef 4c 89 f6 8b 54 24 48 e8 3f d5 a4 ff 49 89 c5 48 8d 68 28 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 a3 24 84 ff 4c 8b 75 00 49 8d 7c 24
RSP: 0018:ffffc90003e4ed08 EFLAGS: 00010206
RAX: 0000000000000005 RBX: dffffc0000000000 RCX: ffff88803d778000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000028 R08: ffffffff820b3a5f R09: 1ffffd400051c7c6
R10: dffffc0000000000 R11: fffff9400051c7c7 R12: ffff88808c889740
R13: 0000000000000000 R14: 000000000000006a R15: ffff888148d3abe8
FS:  00007f8431bda6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000001fffff00 CR3: 000000001d03e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	b8 77 7f ff ff       	mov    $0xffff7f77,%eax
   5:	21 c1                	and    %eax,%ecx
   7:	81 c9 08 80 00 00    	or     $0x8008,%ecx
   d:	4c 89 ef             	mov    %r13,%rdi
  10:	4c 89 f6             	mov    %r14,%rsi
  13:	8b 54 24 48          	mov    0x48(%rsp),%edx
  17:	e8 3f d5 a4 ff       	call   0xffa4d55b
  1c:	49 89 c5             	mov    %rax,%r13
  1f:	48 8d 68 28          	lea    0x28(%rax),%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 ef             	mov    %rbp,%rdi
  33:	e8 a3 24 84 ff       	call   0xff8424db
  38:	4c 8b 75 00          	mov    0x0(%rbp),%r14
  3c:	49                   	rex.WB
  3d:	8d                   	.byte 0x8d
  3e:	7c 24                	jl     0x64