BUG: unable to handle page fault for address: ffffed10496d37ff #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: 444 Comm: syz-executor.5 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:fuse_dev_do_write+0x213e/0x48a0 fs/fuse/dev.c:1946 Code: a6 ae ff 4d 8b 36 4c 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 59 24 00 00 45 8b 3f 41 ff cf 4d 01 f7 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 5a 24 00 00 41 c6 07 00 41 bf a0 00 00 RSP: 0018:ffffc900009a7900 EFLAGS: 00010a07 RAX: 1ffff110496d37ff RBX: 1ffff110296c02a9 RCX: ffff888116a2e540 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900009a7c08 R08: dffffc0000000000 R09: fffff9400091cd4f R10: fffff9400091cd4f R11: 1ffffd400091cd4e R12: ffff88814b601530 R13: dffffc0000000000 R14: ffff88814b69c000 R15: ffff88824b69bfff FS: 00007fe02a5266c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed10496d37ff CR3: 00000001464ab000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fuse_dev_write+0xce/0x130 fs/fuse/dev.c:1996 call_write_iter include/linux/fs.h:2282 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5db/0xca0 fs/read_write.c:584 ksys_write+0x140/0x240 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fe02987c959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe02a5260c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe02999c050 RCX: 00007fe02987c959 RDX: 0000000000000010 RSI: 00000000200042c0 RDI: 0000000000000003 RBP: 00007fe0298d8c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fe02999c050 R15: 00007ffdf69a9168 Modules linked in: CR2: ffffed10496d37ff ---[ end trace 0000000000000000 ]--- RIP: 0010:fuse_dev_do_write+0x213e/0x48a0 fs/fuse/dev.c:1946 Code: a6 ae ff 4d 8b 36 4c 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 59 24 00 00 45 8b 3f 41 ff cf 4d 01 f7 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 5a 24 00 00 41 c6 07 00 41 bf a0 00 00 RSP: 0018:ffffc900009a7900 EFLAGS: 00010a07 RAX: 1ffff110496d37ff RBX: 1ffff110296c02a9 RCX: ffff888116a2e540 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900009a7c08 R08: dffffc0000000000 R09: fffff9400091cd4f R10: fffff9400091cd4f R11: 1ffffd400091cd4e R12: ffff88814b601530 R13: dffffc0000000000 R14: ffff88814b69c000 R15: ffff88824b69bfff FS: 00007fe02a5266c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed10496d37ff CR3: 00000001464ab000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: a6 cmpsb %es:(%rdi),%ds:(%rsi) 1: ae scas %es:(%rdi),%al 2: ff 4d 8b decl -0x75(%rbp) 5: 36 4c 89 f8 ss mov %r15,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 12: 84 c0 test %al,%al 14: 0f 85 59 24 00 00 jne 0x2473 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: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 5a 24 00 00 jne 0x2491 37: 41 c6 07 00 movb $0x0,(%r15) 3b: 41 rex.B 3c: bf .byte 0xbf 3d: a0 .byte 0xa0