F2FS-fs (loop3): Mounted with checkpoint version = 48b305e6
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: 387 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2914 [inline]
RIP: 0010:update_sit_entry+0x58e/0xf50 fs/f2fs/segment.c:2339
Code: 00 00 49 8d 5d 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a0 01 94 ff 48 8b 1b 48 03 5d a8 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ab 08 00 00 44 0f b6 33 44 89 f0 44 8b
RSP: 0018:ffffc90000e87350 EFLAGS: 00010247
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000
RDX: ffff888111162780 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e873d0 R08: ffff888111162780 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888112a921e0 R14: ffff8881133b00c0 R15: ffff8881133b0000
FS: 00007f8e026ed6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e026ccd58 CR3: 00000001124cd000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
f2fs_allocate_data_block+0x156b/0x3a10 fs/f2fs/segment.c:3481
__allocate_data_block+0x52a/0x980 fs/f2fs/data.c:1407
f2fs_map_blocks+0xdc8/0x35c0 fs/f2fs/data.c:1575
expand_inode_data+0x5d7/0x930 fs/f2fs/file.c:1724
f2fs_fallocate+0x42b/0x7e0 fs/f2fs/file.c:1825
vfs_fallocate+0x4b4/0x590 fs/open.c:310
ioctl_preallocate fs/ioctl.c:494 [inline]
file_ioctl fs/ioctl.c:-1 [inline]
do_vfs_ioctl+0x12e3/0x1510 fs/ioctl.c:732
__do_sys_ioctl fs/ioctl.c:751 [inline]
__se_sys_ioctl+0x9f/0x1a0 fs/ioctl.c:739
__x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f8e0287cec9
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:00007f8e026ed038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8e02ad3fa0 RCX: 00007f8e0287cec9
RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000004
RBP: 00007f8e028fff91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e02ad4038 R14: 00007f8e02ad3fa0 R15: 00007fffa84cc348
Modules linked in:
---[ end trace 0e520c17f0430235 ]---
RIP: 0010:f2fs_test_and_set_bit fs/f2fs/f2fs.h:2914 [inline]
RIP: 0010:update_sit_entry+0x58e/0xf50 fs/f2fs/segment.c:2339
Code: 00 00 49 8d 5d 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a0 01 94 ff 48 8b 1b 48 03 5d a8 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ab 08 00 00 44 0f b6 33 44 89 f0 44 8b
RSP: 0018:ffffc90000e87350 EFLAGS: 00010247
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000000000
RDX: ffff888111162780 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e873d0 R08: ffff888111162780 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888112a921e0 R14: ffff8881133b00c0 R15: ffff8881133b0000
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 49 8d 5d 18 lea 0x18(%r13),%rbx
6: 48 89 d8 mov %rbx,%rax
9: 48 c1 e8 03 shr $0x3,%rax
d: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
12: 74 08 je 0x1c
14: 48 89 df mov %rbx,%rdi
17: e8 a0 01 94 ff call 0xff9401bc
1c: 48 8b 1b mov (%rbx),%rbx
1f: 48 03 5d a8 add -0x58(%rbp),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 ab 08 00 00 jne 0x8e2
37: 44 0f b6 33 movzbl (%rbx),%r14d
3b: 44 89 f0 mov %r14d,%eax
3e: 44 rex.R
3f: 8b .byte 0x8b