BUG: unable to handle page fault for address: ffffed105c2295ff #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: 0 PID: 447 Comm: syz-executor.0 Not tainted 5.4.125-syzkaller-00028-g73e6d86c30ee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fuse_dev_do_write+0x5495/0x74e0 fs/fuse/dev.c:1913 Code: 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 8a 04 20 84 c0 0f 85 0c 1d 00 00 8b 1b ff cb 4c 01 fb 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 0f 1d 00 00 c6 03 00 48 8b 84 24 88 00 00 RSP: 0018:ffff8881de8577e0 EFLAGS: 00010a07 RAX: 1ffff1105c2295ff RBX: ffff8882e114afff RCX: dffffc0000000000 RDX: ffffc90000144000 RSI: 0000000000000042 RDI: ffff8881e27b7d50 RBP: ffff8881de857b30 R08: ffffffff81ddb249 R09: fffff94000d38547 R10: fffff94000d38547 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000010 R14: ffff8881dcda9a98 R15: ffff8881e114b000 FS: 00007f4d949bf700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed105c2295ff CR3: 00000001a6145000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fuse_dev_write+0x16e/0x1f0 fs/fuse/dev.c:1950 call_write_iter include/linux/fs.h:1976 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x5ec/0x780 fs/read_write.c:496 vfs_write+0x212/0x4e0 fs/read_write.c:558 ksys_write+0x186/0x2b0 fs/read_write.c:611 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f4d96c48a39 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:00007f4d949bf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f4d96d4bf60 RCX: 00007f4d96c48a39 RDX: 0000000000000010 RSI: 00000000200042c0 RDI: 0000000000000003 RBP: 00007f4d96ca2c5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6f3df22f R14: 00007f4d949bf300 R15: 0000000000022000 Modules linked in: CR2: ffffed105c2295ff ---[ end trace a75099dd3d08e361 ]--- RIP: 0010:fuse_dev_do_write+0x5495/0x74e0 fs/fuse/dev.c:1913 Code: 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 8a 04 20 84 c0 0f 85 0c 1d 00 00 8b 1b ff cb 4c 01 fb 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 0f 1d 00 00 c6 03 00 48 8b 84 24 88 00 00 RSP: 0018:ffff8881de8577e0 EFLAGS: 00010a07 RAX: 1ffff1105c2295ff RBX: ffff8882e114afff RCX: dffffc0000000000 RDX: ffffc90000144000 RSI: 0000000000000042 RDI: ffff8881e27b7d50 RBP: ffff8881de857b30 R08: ffffffff81ddb249 R09: fffff94000d38547 R10: fffff94000d38547 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000010 R14: ffff8881dcda9a98 R15: ffff8881e114b000 FS: 00007f4d949bf700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed105c2295ff CR3: 00000001a6145000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 d8 mov %ebx,%eax 2: 48 c1 e8 03 shr $0x3,%rax 6: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 d: fc ff df 10: 42 8a 04 20 mov (%rax,%r12,1),%al 14: 84 c0 test %al,%al 16: 0f 85 0c 1d 00 00 jne 0x1d28 1c: 8b 1b mov (%rbx),%ebx 1e: ff cb dec %ebx 20: 4c 01 fb add %r15,%rbx 23: 48 89 d8 mov %rbx,%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 0f 1d 00 00 jne 0x1d45 36: c6 03 00 movb $0x0,(%rbx) 39: 48 rex.W 3a: 8b .byte 0x8b 3b: 84 24 88 test %ah,(%rax,%rcx,4)