BUG: unable to handle page fault for address: ffffed104f725dff #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: 1 PID: 13980 Comm: syz-executor.2 Not tainted 5.10.186-syzkaller-01315-g59b65efafe20 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:fuse_dev_do_write+0x143d/0x30e0 fs/fuse/dev.c:1951 Code: e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 56 1a 00 00 45 8b 6d 00 41 ff cd 49 01 dd 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 56 1a 00 00 41 c6 45 00 00 43 80 3c 3c RSP: 0018:ffffc90000d97820 EFLAGS: 00010a07 RAX: 1ffff1104f725dff RBX: ffff88817b92f000 RCX: dffffc0000000000 RDX: ffffc90007a91000 RSI: 00000000000000a4 RDI: 00000000000000a5 RBP: ffffc90000d97b50 R08: ffffffff81fa4e51 R09: fffff94000b8c55f R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1102d23d68b R13: ffff88827b92efff R14: 1ffff1102d23d68e R15: dffffc0000000000 FS: 00007f5336240700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed104f725dff CR3: 000000011d36d000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fuse_dev_write+0x147/0x1d0 fs/fuse/dev.c:2001 call_write_iter include/linux/fs.h:1976 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0xb55/0xe70 fs/read_write.c:605 ksys_write+0x199/0x2c0 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+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f53374cd389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5336240168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f53375ecf80 RCX: 00007f53374cd389 RDX: 0000000000000010 RSI: 00000000200042c0 RDI: 0000000000000003 RBP: 00007f5337518493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc077ad6f R14: 00007f5336240300 R15: 0000000000022000 Modules linked in: CR2: ffffed104f725dff ---[ end trace 73f24738d8a4b1a0 ]--- RIP: 0010:fuse_dev_do_write+0x143d/0x30e0 fs/fuse/dev.c:1951 Code: e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 56 1a 00 00 45 8b 6d 00 41 ff cd 49 01 dd 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 56 1a 00 00 41 c6 45 00 00 43 80 3c 3c RSP: 0018:ffffc90000d97820 EFLAGS: 00010a07 RAX: 1ffff1104f725dff RBX: ffff88817b92f000 RCX: dffffc0000000000 RDX: ffffc90007a91000 RSI: 00000000000000a4 RDI: 00000000000000a5 RBP: ffffc90000d97b50 R08: ffffffff81fa4e51 R09: fffff94000b8c55f R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1102d23d68b R13: ffff88827b92efff R14: 1ffff1102d23d68e R15: dffffc0000000000 FS: 00007f5336240700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed104f725dff CR3: 000000011d36d000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 7: fc ff df a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax f: 84 c0 test %al,%al 11: 0f 85 56 1a 00 00 jne 0x1a6d 17: 45 8b 6d 00 mov 0x0(%r13),%r13d 1b: 41 ff cd dec %r13d 1e: 49 01 dd add %rbx,%r13 21: 4c 89 e8 mov %r13,%rax 24: 48 c1 e8 03 shr $0x3,%rax * 28: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2d: 84 c0 test %al,%al 2f: 0f 85 56 1a 00 00 jne 0x1a8b 35: 41 c6 45 00 00 movb $0x0,0x0(%r13) 3a: 43 rex.XB 3b: 80 .byte 0x80 3c: 3c 3c cmp $0x3c,%al