general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 1 PID: 1452 Comm: syz.6.286 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2946 [inline]
RIP: 0010:update_sit_entry+0x5a1/0xf40 fs/f2fs/segment.c:2263
Code: 8b 45 c8 48 8d 58 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 5c 6f 90 ff 48 8b 1b 4c 01 f3 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 08 00 00 44 0f b6 33 44 89 f0 44 8b
RSP: 0018:ffffc90001337278 EFLAGS: 00010207
RAX: 0000000000000005 RBX: 000000000000002c RCX: ffff88811b0d4f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900013372f8 R08: ffff88811dde69d0 R09: 1ffff11023bbcd3a
R10: dffffc0000000000 R11: ffffed1023bbcd3b R12: 1ffff110232b7c75
R13: dffffc0000000000 R14: 000000000000002c R15: ffff88813cf56000
FS:  00007fdee43866c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f97c8d0d000 CR3: 0000000128771000 CR4: 00000000003506a0
Call Trace:
 <TASK>
 f2fs_allocate_data_block+0x13c2/0x33c0 fs/f2fs/segment.c:3463
 __allocate_data_block+0x557/0xa70 fs/f2fs/data.c:1440
 f2fs_map_blocks+0xe24/0x3530 fs/f2fs/data.c:1615
 expand_inode_data+0x54b/0x940 fs/f2fs/file.c:1788
 f2fs_fallocate+0x41a/0x8d0 fs/f2fs/file.c:1891
 vfs_fallocate+0x4b9/0x590 fs/open.c:309
 ioctl_preallocate fs/ioctl.c:294 [inline]
 file_ioctl fs/ioctl.c:334 [inline]
 do_vfs_ioctl+0x19f4/0x1d80 fs/ioctl.c:853
 __do_sys_ioctl fs/ioctl.c:872 [inline]
 __se_sys_ioctl+0x9f/0x1a0 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fdee594e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdee4386028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fdee5bd6090 RCX: 00007fdee594e159
RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000004
RBP: 00007fdee59e5024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdee5bd6128 R14: 00007fdee5bd6090 R15: 00007ffe3a16eff8
 </TASK>
Modules linked in:
---[ end trace 3caa08863511140d ]---
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2946 [inline]
RIP: 0010:update_sit_entry+0x5a1/0xf40 fs/f2fs/segment.c:2263
Code: 8b 45 c8 48 8d 58 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 5c 6f 90 ff 48 8b 1b 4c 01 f3 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 08 00 00 44 0f b6 33 44 89 f0 44 8b
RSP: 0018:ffffc90001337278 EFLAGS: 00010207
RAX: 0000000000000005 RBX: 000000000000002c RCX: ffff88811b0d4f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900013372f8 R08: ffff88811dde69d0 R09: 1ffff11023bbcd3a
R10: dffffc0000000000 R11: ffffed1023bbcd3b R12: 1ffff110232b7c75
R13: dffffc0000000000 R14: 000000000000002c R15: ffff88813cf56000
FS:  00007fdee43866c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f41e646d000 CR3: 0000000128771000 CR4: 00000000003526a0
----------------
Code disassembly (best guess):
   0:	8b 45 c8             	mov    -0x38(%rbp),%eax
   3:	48 8d 58 18          	lea    0x18(%rax),%rbx
   7:	48 89 d8             	mov    %rbx,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  13:	74 08                	je     0x1d
  15:	48 89 df             	mov    %rbx,%rdi
  18:	e8 5c 6f 90 ff       	call   0xff906f79
  1d:	48 8b 1b             	mov    (%rbx),%rbx
  20:	4c 01 f3             	add    %r14,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 86 08 00 00    	jne    0x8bd
  37:	44 0f b6 33          	movzbl (%rbx),%r14d
  3b:	44 89 f0             	mov    %r14d,%eax
  3e:	44                   	rex.R
  3f:	8b                   	.byte 0x8b