syzbot

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 0 UID: 0 PID: 298 Comm: syz-executor395 Not tainted 6.12.23-syzkaller-gd9fd901baa98 #0 f1acc3ef52b3e732a05c4f7a2560722db90bb473
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:fuse_file_release+0x29e/0x400 fs/fuse/file.c:388
Code: 00 74 12 48 89 df e8 41 1e a1 ff 48 ba 00 00 00 00 00 fc ff df 4c 89 2b 4c 8b 75 b8 49 81 c7 c8 00 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ff e8 f4 1c a1 ff 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000126fd88 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000000 RCX: ffff888100f28000
RDX: dffffc0000000000 RSI: 0000000000000a02 RDI: ffff88810ea47c78
RBP: ffffc9000126fdd0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200024df80 R12: 0000000000008002
R13: ffff888128f18480 R14: ffff88810ea47c00 R15: 00000000000000c8
FS:  000055558b5de3c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f752f045d58 CR3: 00000001232ac000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fuse_release_common fs/fuse/file.c:393 [inline]
 fuse_release+0x13e/0x1b0 fs/fuse/file.c:408
 __fput+0x1fb/0xa00 fs/file_table.c:431
 __fput_sync+0x4a/0x70 fs/file_table.c:516
 __do_sys_close fs/open.c:1590 [inline]
 __se_sys_close+0x17b/0x240 fs/open.c:1575
 __x64_sys_close+0x3c/0x60 fs/open.c:1575
 x64_sys_call+0x2560/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f752f0b8b4a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 33 63 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 93 63 02 00 8b 44 24
RSP: 002b:00007fff60194c60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f752f0b8b4a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000005904 R08: 7fffffffffffffff R09: 0000000000000000
R10: 00007fff60194ca0 R11: 0000000000000293 R12: 0000000000000008
R13: 0000000000005936 R14: 00000000000003e8 R15: 00007f752f1443fc
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fuse_file_release+0x29e/0x400 fs/fuse/file.c:388
Code: 00 74 12 48 89 df e8 41 1e a1 ff 48 ba 00 00 00 00 00 fc ff df 4c 89 2b 4c 8b 75 b8 49 81 c7 c8 00 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ff e8 f4 1c a1 ff 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000126fd88 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000000 RCX: ffff888100f28000
RDX: dffffc0000000000 RSI: 0000000000000a02 RDI: ffff88810ea47c78
RBP: ffffc9000126fdd0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200024df80 R12: 0000000000008002
R13: ffff888128f18480 R14: ffff88810ea47c00 R15: 00000000000000c8
FS:  000055558b5de3c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f752f045d58 CR3: 00000001232ac000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 74 12 48          	add    %dh,0x48(%rdx,%rdx,1)
   4:	89 df                	mov    %ebx,%edi
   6:	e8 41 1e a1 ff       	call   0xffa11e4c
   b:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  12:	fc ff df
  15:	4c 89 2b             	mov    %r13,(%rbx)
  18:	4c 8b 75 b8          	mov    -0x48(%rbp),%r14
  1c:	49 81 c7 c8 00 00 00 	add    $0xc8,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1) <-- trapping instruction
  2e:	74 12                	je     0x42
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 f4 1c a1 ff       	call   0xffa11d2c
  38:	48                   	rex.W
  39:	ba 00 00 00 00       	mov    $0x0,%edx
  3e:	00 fc                	add    %bh,%ah