BUG: unable to handle page fault for address: ffffed104e33f5ff #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: 27570 Comm: syz-executor.2 Not tainted 5.10.178-syzkaller-00127-g43c801dc3325 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:fuse_dev_do_write+0x11f5/0x3080 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 6a 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 6a 1a 00 00 41 c6 45 00 00 48 8b 44 24 RSP: 0018:ffffc90000c07820 EFLAGS: 00010a07 RAX: 1ffff1104e33f5ff RBX: ffff8881719fb000 RCX: dffffc0000000000 RDX: ffffc900027d5000 RSI: 0000000000000056 RDI: 0000000000000057 RBP: ffffc90000c07b50 R08: ffffffff81fa3dc8 R09: fffff94000b31a6f R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881114552a8 R13: ffff8882719fafff R14: 1ffff1102228aa58 R15: dffffc0000000000 FS: 00007fe03d88a700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed104e33f5ff CR3: 000000011591d000 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: 0033:0x7fe03eb17169 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:00007fe03d88a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe03ec36f80 RCX: 00007fe03eb17169 RDX: 0000000000000010 RSI: 00000000200042c0 RDI: 0000000000000003 RBP: 00007fe03eb72ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf1cd9b2f R14: 00007fe03d88a300 R15: 0000000000022000 Modules linked in: CR2: ffffed104e33f5ff ---[ end trace 5c51792db8faa1cc ]--- RIP: 0010:fuse_dev_do_write+0x11f5/0x3080 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 6a 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 6a 1a 00 00 41 c6 45 00 00 48 8b 44 24 RSP: 0018:ffffc90000c07820 EFLAGS: 00010a07 RAX: 1ffff1104e33f5ff RBX: ffff8881719fb000 RCX: dffffc0000000000 RDX: ffffc900027d5000 RSI: 0000000000000056 RDI: 0000000000000057 RBP: ffffc90000c07b50 R08: ffffffff81fa3dc8 R09: fffff94000b31a6f R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881114552a8 R13: ffff8882719fafff R14: 1ffff1102228aa58 R15: dffffc0000000000 FS: 00007fe03d88a700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed104e33f5ff CR3: 000000011591d000 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 6a 1a 00 00 jne 0x1a81 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 6a 1a 00 00 jne 0x1a9f 35: 41 c6 45 00 00 movb $0x0,0x0(%r13) 3a: 48 rex.W 3b: 8b .byte 0x8b 3c: 44 rex.R 3d: 24 .byte 0x24