netlink: 40 bytes leftover after parsing attributes in process `syz.2.800'.
netlink: 40 bytes leftover after parsing attributes in process `syz.2.800'.
BUG: unable to handle page fault for address: ffffed10481f9fff
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23fff2067 P4D 23fff2067 PUD 23fff0067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3292 Comm: syz.2.800 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fuse_dev_do_write+0xf21/0x2ca0 fs/fuse/dev.c:1953
Code: 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df 0f b6 04 10 84 c0 0f 85 59 1b 00 00 45 8b 3f 41 ff cf 4d 01 f7 4c 89 f8 48 c1 e8 03 <0f> b6 04 10 84 c0 0f 85 65 1b 00 00 41 c6 07 00 41 bf a0 00 00 00
RSP: 0018:ffffc9000156f900 EFLAGS: 00010a07
RAX: 1ffff110481f9fff RBX: 1ffff11022410f66 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000056 RDI: 0000000000000057
RBP: ffffc9000156fc08 R08: ffffea0004d22ef7 R09: 1ffffd40009a45de
R10: dffffc0000000000 R11: fffff940009a45df R12: 0000000000000010
R13: 1ffff11022410f63 R14: ffff888140fd0000 R15: ffff888240fcffff
FS:  00007fd284f846c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed10481f9fff CR3: 0000000116d62000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fuse_dev_write+0xde/0x140 fs/fuse/dev.c:2003
 call_write_iter include/linux/fs.h:2066 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x758/0xdc0 fs/read_write.c:605
 ksys_write+0x149/0x250 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd286548cb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd284f84028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd2867c4090 RCX: 00007fd286548cb9
RDX: 0000000000000010 RSI: 00002000000004c0 RDI: 0000000000000004
RBP: 00007fd2865b6bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd2867c4128 R14: 00007fd2867c4090 R15: 00007ffe4e909c18
Modules linked in:
CR2: ffffed10481f9fff
---[ end trace dfa67de077a51583 ]---
RIP: 0010:fuse_dev_do_write+0xf21/0x2ca0 fs/fuse/dev.c:1953
Code: 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df 0f b6 04 10 84 c0 0f 85 59 1b 00 00 45 8b 3f 41 ff cf 4d 01 f7 4c 89 f8 48 c1 e8 03 <0f> b6 04 10 84 c0 0f 85 65 1b 00 00 41 c6 07 00 41 bf a0 00 00 00
RSP: 0018:ffffc9000156f900 EFLAGS: 00010a07
RAX: 1ffff110481f9fff RBX: 1ffff11022410f66 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000056 RDI: 0000000000000057
RBP: ffffc9000156fc08 R08: ffffea0004d22ef7 R09: 1ffffd40009a45de
R10: dffffc0000000000 R11: fffff940009a45df R12: 0000000000000010
R13: 1ffff11022410f63 R14: ffff888140fd0000 R15: ffff888240fcffff
FS:  00007fd284f846c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed10481f9fff CR3: 0000000116d62000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 c1 e8 03          	shr    $0x3,%rax
   4:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
   b:	fc ff df
   e:	0f b6 04 10          	movzbl (%rax,%rdx,1),%eax
  12:	84 c0                	test   %al,%al
  14:	0f 85 59 1b 00 00    	jne    0x1b73
  1a:	45 8b 3f             	mov    (%r15),%r15d
  1d:	41 ff cf             	dec    %r15d
  20:	4d 01 f7             	add    %r14,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 10          	movzbl (%rax,%rdx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 65 1b 00 00    	jne    0x1b9b
  36:	41 c6 07 00          	movb   $0x0,(%r15)
  3a:	41 bf a0 00 00 00    	mov    $0xa0,%r15d