Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 UID: 0 PID: 6039 Comm: syz.0.20 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:_compound_head include/linux/page-flags.h:284 [inline]
RIP: 0010:get_contig_folio_len block/bio.c:1183 [inline]
RIP: 0010:__bio_iov_iter_get_pages block/bio.c:1269 [inline]
RIP: 0010:bio_iov_iter_get_pages+0x80e/0x11c0 block/bio.c:1336
Code: 30 4c 89 ac 24 c0 00 00 00 49 89 dd 48 8b 04 d9 48 89 44 24 18 48 8d 58 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 94 c6 7c fd 48 8b 1b 48 89 de 48 83
RSP: 0018:ffffc90002fe73e0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002fe7590 R08: ffffea0001668007 R09: 1ffffd40002cd000
R10: dffffc0000000000 R11: fffff940002cd001 R12: 00000000000ad000
R13: 00000000000000ad R14: 0000000000001000 R15: 1ffff1100f138a2d
FS: 0000555564b88500(0000) GS:ffff888125af9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0bc759e000 CR3: 0000000077cd4000 CR4: 00000000003526f0
Call Trace:
<TASK>
__blkdev_direct_IO+0x60b/0xee0 block/fops.c:215
blkdev_direct_IO+0x120f/0x1730 block/fops.c:434
blkdev_direct_write+0x7c/0x140 block/fops.c:719
blkdev_write_iter+0x547/0x710 block/fops.c:787
aio_write+0x535/0x7a0 fs/aio.c:1634
__io_submit_one fs/aio.c:-1 [inline]
io_submit_one+0x78b/0x1310 fs/aio.c:2053
__do_sys_io_submit fs/aio.c:2112 [inline]
__se_sys_io_submit+0x185/0x2f0 fs/aio.c:2082
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0bc678ebe9
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:00007fffb538a3e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f0bc69c5fa0 RCX: 00007f0bc678ebe9
RDX: 00002000000000c0 RSI: 00000000000000f3 RDI: 00007f0bc759e000
RBP: 00007f0bc6811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0bc69c5fa0 R14: 00007f0bc69c5fa0 R15: 0000000000000003
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:_compound_head include/linux/page-flags.h:284 [inline]
RIP: 0010:get_contig_folio_len block/bio.c:1183 [inline]
RIP: 0010:__bio_iov_iter_get_pages block/bio.c:1269 [inline]
RIP: 0010:bio_iov_iter_get_pages+0x80e/0x11c0 block/bio.c:1336
Code: 30 4c 89 ac 24 c0 00 00 00 49 89 dd 48 8b 04 d9 48 89 44 24 18 48 8d 58 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 94 c6 7c fd 48 8b 1b 48 89 de 48 83
RSP: 0018:ffffc90002fe73e0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002fe7590 R08: ffffea0001668007 R09: 1ffffd40002cd000
R10: dffffc0000000000 R11: fffff940002cd001 R12: 00000000000ad000
R13: 00000000000000ad R14: 0000000000001000 R15: 1ffff1100f138a2d
FS: 0000555564b88500(0000) GS:ffff888125af9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0042bc000 CR3: 0000000077cd4000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 30 4c 89 ac xor %cl,-0x54(%rcx,%rcx,4)
4: 24 c0 and $0xc0,%al
6: 00 00 add %al,(%rax)
8: 00 49 89 add %cl,-0x77(%rcx)
b: dd 48 8b fisttpll -0x75(%rax)
e: 04 d9 add $0xd9,%al
10: 48 89 44 24 18 mov %rax,0x18(%rsp)
15: 48 8d 58 08 lea 0x8(%rax),%rbx
19: 48 89 d8 mov %rbx,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 48 89 df mov %rbx,%rdi
33: e8 94 c6 7c fd call 0xfd7cc6cc
38: 48 8b 1b mov (%rbx),%rbx
3b: 48 89 de mov %rbx,%rsi
3e: 48 rex.W
3f: 83 .byte 0x83