general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 12102 Comm: syz-executor.1 Not tainted 6.1.57-syzkaller-00085-g6465e29536ed #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 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 81 6b 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:ffffc9000d487940 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000040000 RDX: ffffc900050c9000 RSI: 0000000000000182 RDI: 0000000000000183 RBP: ffffc9000d487b30 R08: ffffffff81caa76d R09: fffff52001a90f0f R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc9000d487b88 R15: ffffc9000d487da0 FS: 00007fef3f61f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fef3f5dcfa8 CR3: 00000001332fe000 CR4: 00000000003506a0 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:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fef3e87cae9 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:00007fef3f61f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fef3e99bf80 RCX: 00007fef3e87cae9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: ffffffffffffff9c RBP: 00007fef3e8c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fef3e99bf80 R15: 00007ffc2204b298 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 81 6b 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:ffffc9000d487940 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: 0000000000040000 RDX: ffffc900050c9000 RSI: 0000000000000182 RDI: 0000000000000183 RBP: ffffc9000d487b30 R08: ffffffff81caa76d R09: fffff52001a90f0f R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc9000d487b88 R15: ffffc9000d487da0 FS: 00007fef3f61f6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ae103efa8 CR3: 00000001332fe000 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 81 6b ad ff call 0xffad6b9a 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