general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 358 Comm: syz-executor.0 Not tainted 5.15.150-syzkaller-1069439-g9044d25b8ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline] RIP: 0010:atomic_open fs/namei.c:3341 [inline] RIP: 0010:lookup_open fs/namei.c:3433 [inline] RIP: 0010:open_last_lookups fs/namei.c:3532 [inline] RIP: 0010:path_openat+0x185b/0x2f40 fs/namei.c:3739 Code: b6 04 28 84 c0 0f 85 ef 07 00 00 48 8b 44 24 28 80 60 01 f8 e9 cc ed ff ff e8 01 96 b2 ff 48 8b 5c 24 10 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 a6 07 00 00 49 89 de 8b 1b be 00 00 70 RSP: 0018:ffffc90000d67900 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88810a8c13c0 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffffc90000d67b50 R08: ffffffff81c07e08 R09: ffffed1023b0dc0c R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d67ba0 R13: dffffc0000000000 R14: 0000000000000008 R15: ffffc90000d67da0 FS: 00007f7c142e46c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c147ce244 CR3: 000000011c163000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_filp_open+0x21c/0x460 fs/namei.c:3769 do_sys_openat2+0x13f/0x830 fs/open.c:1234 do_sys_open fs/open.c:1250 [inline] __do_sys_openat fs/open.c:1266 [inline] __se_sys_openat fs/open.c:1261 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1261 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f7c14761ae9 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:00007f7c142e40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f7c14880f80 RCX: 00007f7c14761ae9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007f7c147ad47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f7c14880f80 R15: 00007ffde819f6b8 Modules linked in: ---[ end trace 628ba031b24f7ae8 ]--- RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline] RIP: 0010:atomic_open fs/namei.c:3341 [inline] RIP: 0010:lookup_open fs/namei.c:3433 [inline] RIP: 0010:open_last_lookups fs/namei.c:3532 [inline] RIP: 0010:path_openat+0x185b/0x2f40 fs/namei.c:3739 Code: b6 04 28 84 c0 0f 85 ef 07 00 00 48 8b 44 24 28 80 60 01 f8 e9 cc ed ff ff e8 01 96 b2 ff 48 8b 5c 24 10 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 a6 07 00 00 49 89 de 8b 1b be 00 00 70 RSP: 0018:ffffc90000d67900 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88810a8c13c0 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 RBP: ffffc90000d67b50 R08: ffffffff81c07e08 R09: ffffed1023b0dc0c R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000d67ba0 R13: dffffc0000000000 R14: 0000000000000008 R15: ffffc90000d67da0 FS: 00007f7c142e46c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005633d9127078 CR3: 000000011c163000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: b6 04 mov $0x4,%dh 2: 28 84 c0 0f 85 ef 07 sub %al,0x7ef850f(%rax,%rax,8) 9: 00 00 add %al,(%rax) b: 48 8b 44 24 28 mov 0x28(%rsp),%rax 10: 80 60 01 f8 andb $0xf8,0x1(%rax) 14: e9 cc ed ff ff jmp 0xffffede5 19: e8 01 96 b2 ff call 0xffb2961f 1e: 48 8b 5c 24 10 mov 0x10(%rsp),%rbx 23: 48 89 d8 mov %rbx,%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 a6 07 00 00 jne 0x7dd 37: 49 89 de mov %rbx,%r14 3a: 8b 1b mov (%rbx),%ebx 3c: be .byte 0xbe 3d: 00 00 add %al,(%rax) 3f: 70 .byte 0x70