BUG: unable to handle page fault for address: ffffed105d01d1ff #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23fff3067 P4D 23fff3067 PUD 23fff1067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 658 Comm: syz-executor.3 Not tainted 5.4.147-syzkaller-00013-g93698d0219f2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fuse_dev_do_write+0x4c83/0x6b90 fs/fuse/dev.c:1923 Code: e8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 8a 04 20 84 c0 0f 85 d6 1b 00 00 8b 6d 00 ff cd 48 01 dd 48 89 e8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 d8 1b 00 00 c6 45 00 00 48 8b 44 24 58 42 RSP: 0018:ffff8881ede57bc0 EFLAGS: 00010a07 RAX: 1ffff1105d01d1ff RBX: ffff8881e80e9000 RCX: dffffc0000000000 RDX: ffffc90002958000 RSI: 0000000000000042 RDI: ffff8881e8467e28 RBP: ffff8882e80e8fff R08: ffffffff81d3a739 R09: fffff94000d513ff R10: fffff94000d513ff R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8881e9c6d800 R14: ffff8881e8b90ea0 R15: 0000000000000000 FS: 00007f45b538d700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed105d01d1ff CR3: 00000001ec1f2000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fuse_dev_write+0x10e/0x170 fs/fuse/dev.c:1960 call_write_iter include/linux/fs.h:1976 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x506/0x6b0 fs/read_write.c:496 vfs_write+0x212/0x4e0 fs/read_write.c:558 ksys_write+0x13f/0x240 fs/read_write.c:611 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f45b5c16af9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f45b538d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f45b5d29f60 RCX: 00007f45b5c16af9 RDX: 0000000000000010 RSI: 00000000200042c0 RDI: 0000000000000003 RBP: 00007f45b5c70ff7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcbfdc930f R14: 00007f45b538d300 R15: 0000000000022000 Modules linked in: CR2: ffffed105d01d1ff ---[ end trace 77078937b00a272c ]--- RIP: 0010:fuse_dev_do_write+0x4c83/0x6b90 fs/fuse/dev.c:1923 Code: e8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 8a 04 20 84 c0 0f 85 d6 1b 00 00 8b 6d 00 ff cd 48 01 dd 48 89 e8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 d8 1b 00 00 c6 45 00 00 48 8b 44 24 58 42 RSP: 0018:ffff8881ede57bc0 EFLAGS: 00010a07 RAX: 1ffff1105d01d1ff RBX: ffff8881e80e9000 RCX: dffffc0000000000 RDX: ffffc90002958000 RSI: 0000000000000042 RDI: ffff8881e8467e28 RBP: ffff8882e80e8fff R08: ffffffff81d3a739 R09: fffff94000d513ff R10: fffff94000d513ff R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8881e9c6d800 R14: ffff8881e8b90ea0 R15: 0000000000000000 FS: 00007f45b538d700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed105d01d1ff CR3: 00000001ec1f2000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 48 c1 e8 03 callq 0x3e8c14d 5: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 c: fc ff df f: 42 8a 04 20 mov (%rax,%r12,1),%al 13: 84 c0 test %al,%al 15: 0f 85 d6 1b 00 00 jne 0x1bf1 1b: 8b 6d 00 mov 0x0(%rbp),%ebp 1e: ff cd dec %ebp 20: 48 01 dd add %rbx,%rbp 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 8a 04 20 mov (%rax,%r12,1),%al <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 d8 1b 00 00 jne 0x1c0e 36: c6 45 00 00 movb $0x0,0x0(%rbp) 3a: 48 8b 44 24 58 mov 0x58(%rsp),%rax 3f: 42 rex.X