general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 1 PID: 298 Comm: syz-executor305 Not tainted 5.15.152-syzkaller-00143-g70e1a731d986 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:d_really_is_positive include/linux/dcache.h:503 [inline]
RIP: 0010:fuse_atomic_open+0x26f/0x3a90 fs/fuse/dir.c:871
Code: e0 40 4c 8b 64 24 48 75 07 e8 9d 94 66 ff eb 37 48 8b 44 24 70 48 8d 58 30 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 a3 ce a8 ff 48 83 3b 00 0f 84 a6 00
RSP: 0018:ffffc900009e7280 EFLAGS: 00010203
RAX: 0000000000000008 RBX: 0000000000000044 RCX: dffffc0000000000
RDX: ffff888121482780 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc900009e78f0 R08: ffffffff8209adc2 R09: fffff5200013cd99
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881191d16a8
R13: ffff88811796e000 R14: 1ffff9200013ce6c R15: 0000000000000014
FS: 00007f4f7b48c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f7b55fa50 CR3: 000000011ccae000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
atomic_open fs/namei.c:3325 [inline]
lookup_open fs/namei.c:3433 [inline]
open_last_lookups fs/namei.c:3532 [inline]
path_openat+0xfde/0x2f40 fs/namei.c:3739
do_filp_open+0x21c/0x460 fs/namei.c:3769
do_sys_openat2+0x13f/0x830 fs/open.c:1234
do_sys_open fs/open.c:1250 [inline]
__do_sys_openat fs/open.c:1266 [inline]
__se_sys_openat fs/open.c:1261 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1261
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f4f7b4ee7d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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:00007f4f7b48c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4f7b57e3d8 RCX: 00007f4f7b4ee7d9
RDX: 0000000000000040 RSI: 000000002000c380 RDI: 00000000ffffff9c
RBP: 00007f4f7b57e3d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4f7b54b104
R13: 000000000000006e R14: 00007f4f7b549100 R15: 0030656c69662f2e
</TASK>
Modules linked in:
---[ end trace 4cb19a1c89f8896c ]---
RIP: 0010:d_really_is_positive include/linux/dcache.h:503 [inline]
RIP: 0010:fuse_atomic_open+0x26f/0x3a90 fs/fuse/dir.c:871
Code: e0 40 4c 8b 64 24 48 75 07 e8 9d 94 66 ff eb 37 48 8b 44 24 70 48 8d 58 30 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 a3 ce a8 ff 48 83 3b 00 0f 84 a6 00
RSP: 0018:ffffc900009e7280 EFLAGS: 00010203
RAX: 0000000000000008 RBX: 0000000000000044 RCX: dffffc0000000000
RDX: ffff888121482780 RSI: 0000000000000040 RDI: 0000000000000000
RBP: ffffc900009e78f0 R08: ffffffff8209adc2 R09: fffff5200013cd99
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881191d16a8
R13: ffff88811796e000 R14: 1ffff9200013ce6c R15: 0000000000000014
FS: 00007f4f7b48c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020005000 CR3: 000000011ccae000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: e0 40 loopne 0x42
2: 4c 8b 64 24 48 mov 0x48(%rsp),%r12
7: 75 07 jne 0x10
9: e8 9d 94 66 ff call 0xff6694ab
e: eb 37 jmp 0x47
10: 48 8b 44 24 70 mov 0x70(%rsp),%rax
15: 48 8d 58 30 lea 0x30(%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 a3 ce a8 ff call 0xffa8cedb
38: 48 83 3b 00 cmpq $0x0,(%rbx)
3c: 0f .byte 0xf
3d: 84 .byte 0x84
3e: a6 cmpsb %es:(%rdi),%ds:(%rsi)