general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 356 Comm: syz-executor.0 Not tainted 6.1.68-syzkaller-1150876-g5f66e7c904ee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline] RIP: 0010:atomic_open fs/namei.c:3292 [inline] RIP: 0010:lookup_open fs/namei.c:3384 [inline] RIP: 0010:open_last_lookups fs/namei.c:3481 [inline] RIP: 0010:path_openat+0x133f/0x2d60 fs/namei.c:3711 Code: ff ff 48 8b 3c 24 e8 80 e0 02 00 48 63 db 4c 8b 74 24 08 eb 5f e8 e1 52 ad ff 4c 8b 74 24 08 48 8b 1c 24 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 1c 0b 00 00 48 89 1c 24 8b 1b be 00 00 RSP: 0018:ffffc90002ebf940 EFLAGS: 00010247 RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffff88810f6a8000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffffc90002ebfb30 R08: ffffffff81cafcdb R09: fffff520005d7f0f R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90002ebfb88 R15: ffffc90002ebfda0 FS: 00007fad109936c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fad109b3fa8 CR3: 000000012386b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_filp_open+0x230/0x480 fs/namei.c:3741 do_sys_openat2+0x13f/0x850 fs/open.c:1341 do_sys_open fs/open.c:1357 [inline] __do_sys_openat fs/open.c:1373 [inline] __se_sys_openat fs/open.c:1368 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1368 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fad0fc7c959 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:00007fad109930c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fad0fd9c050 RCX: 00007fad0fc7c959 RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007fad0fcd8c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fad0fd9c050 R15: 00007ffe303e2048 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__d_entry_type include/linux/dcache.h:394 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:399 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:445 [inline] RIP: 0010:atomic_open fs/namei.c:3292 [inline] RIP: 0010:lookup_open fs/namei.c:3384 [inline] RIP: 0010:open_last_lookups fs/namei.c:3481 [inline] RIP: 0010:path_openat+0x133f/0x2d60 fs/namei.c:3711 Code: ff ff 48 8b 3c 24 e8 80 e0 02 00 48 63 db 4c 8b 74 24 08 eb 5f e8 e1 52 ad ff 4c 8b 74 24 08 48 8b 1c 24 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 1c 0b 00 00 48 89 1c 24 8b 1b be 00 00 RSP: 0018:ffffc90002ebf940 EFLAGS: 00010247 RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffff88810f6a8000 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffffc90002ebfb30 R08: ffffffff81cafcdb R09: fffff520005d7f0f R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90002ebfb88 R15: ffffc90002ebfda0 FS: 00007fad109936c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fad109b3fa8 CR3: 000000012386b000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff 48 8b decl -0x75(%rax) 3: 3c 24 cmp $0x24,%al 5: e8 80 e0 02 00 call 0x2e08a a: 48 63 db movslq %ebx,%rbx d: 4c 8b 74 24 08 mov 0x8(%rsp),%r14 12: eb 5f jmp 0x73 14: e8 e1 52 ad ff call 0xffad52fa 19: 4c 8b 74 24 08 mov 0x8(%rsp),%r14 1e: 48 8b 1c 24 mov (%rsp),%rbx 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 1c 0b 00 00 jne 0xb52 36: 48 89 1c 24 mov %rbx,(%rsp) 3a: 8b 1b mov (%rbx),%ebx 3c: be .byte 0xbe