general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 292 Comm: syz-executor290 Not tainted 6.1.134-syzkaller-00039-g3c6d0251e1fb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2940 [inline]
RIP: 0010:update_sit_entry_for_alloc fs/f2fs/segment.c:2396 [inline]
RIP: 0010:update_sit_entry+0x4f9/0x15a0 fs/f2fs/segment.c:2440
Code: 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 ae 1c 8d ff 48 8b 1b 4c 01 f3 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 55 0f 00 00 44 0f b6 23 44 89 e0 44 08 f8
RSP: 0018:ffffc90000eb71e0 EFLAGS: 00010247
RAX: 0000000000000000 RBX: 0000000000000004 RCX: dffffc0000000000
RDX: ffff88810e63d100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000eb72b0 R08: ffff88810e63d100 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000000
R13: ffff88810d9440c8 R14: 0000000000000004 R15: 0000000000000008
FS: 00007f3709de76c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3702221000 CR3: 0000000124f14000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
f2fs_allocate_data_block+0x148c/0x3af0 fs/f2fs/segment.c:3430
__allocate_data_block fs/f2fs/data.c:1488 [inline]
f2fs_map_blocks+0x11a8/0x3a60 fs/f2fs/data.c:1671
f2fs_expand_inode_data+0x639/0xa70 fs/f2fs/file.c:1847
f2fs_fallocate+0x3cc/0x720 fs/f2fs/file.c:1948
vfs_fallocate+0x4c5/0x5a0 fs/open.c:324
ioctl_preallocate fs/ioctl.c:290 [inline]
file_ioctl fs/ioctl.c:-1 [inline]
do_vfs_ioctl+0x1a1d/0x1c80 fs/ioctl.c:849
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x9f/0x1b0 fs/ioctl.c:856
__x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
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: 0033:0x7f3709e2a739
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3709de7218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3709eb6608 RCX: 00007f3709e2a739
RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000004
RBP: 00007f3709eb6600 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3709e835f0
R13: 00002000000000c0 R14: 00002000000000e0 R15: 0000200000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2940 [inline]
RIP: 0010:update_sit_entry_for_alloc fs/f2fs/segment.c:2396 [inline]
RIP: 0010:update_sit_entry+0x4f9/0x15a0 fs/f2fs/segment.c:2440
Code: 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 ae 1c 8d ff 48 8b 1b 4c 01 f3 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 55 0f 00 00 44 0f b6 23 44 89 e0 44 08 f8
RSP: 0018:ffffc90000eb71e0 EFLAGS: 00010247
RAX: 0000000000000000 RBX: 0000000000000004 RCX: dffffc0000000000
RDX: ffff88810e63d100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000eb72b0 R08: ffff88810e63d100 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000000
R13: ffff88810d9440c8 R14: 0000000000000004 R15: 0000000000000008
FS: 00007f3709de76c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3702470000 CR3: 0000000124f14000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
0: df 80 3c 08 00 74 filds 0x7400083c(%rax)
6: 08 48 89 or %cl,-0x77(%rax)
9: df e8 fucomip %st(0),%st
b: ae scas %es:(%rdi),%al
c: 1c 8d sbb $0x8d,%al
e: ff 48 8b decl -0x75(%rax)
11: 1b 4c 01 f3 sbb -0xd(%rcx,%rax,1),%ecx
15: 48 89 d8 mov %rbx,%rax
18: 48 c1 e8 03 shr $0x3,%rax
1c: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
23: fc ff df
* 26: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction
2a: 84 c0 test %al,%al
2c: 0f 85 55 0f 00 00 jne 0xf87
32: 44 0f b6 23 movzbl (%rbx),%r12d
36: 44 89 e0 mov %r12d,%eax
39: 44 08 f8 or %r15b,%al