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: 12865 Comm: syz.8.3889 Not tainted 5.15.180-syzkaller-00024-g88c4075c39ed #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 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+0x11ff/0x2f10 fs/namei.c:3739 Code: 48 89 df e8 03 81 02 00 49 63 de 48 81 fb 00 f0 ff ff 0f 87 05 f8 ff ff eb 62 e8 bc 31 b7 ff 4c 8b 2c 24 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 6b 0d 00 00 44 8b 33 be 00 00 70 00 44 RSP: 0000:ffffc900012479c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 000000000000000a RCX: 0000000000080000 RDX: ffffc90002792000 RSI: 0000000000001027 RDI: 0000000000001028 RBP: ffffc90001247bd0 R08: dffffc0000000000 R09: ffffed10263844b6 R10: ffffed10263844b6 R11: 1ffff110263844b5 R12: 0000000000000000 R13: ffffc90001247c20 R14: ffff88811c15ca98 R15: dffffc0000000000 FS: 00007f80608576c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000027b030 CR3: 0000000117823000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x14c/0x7b0 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+0x136/0x160 fs/open.c:1261 x64_sys_call+0x219/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f8062230969 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8060857038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f8062458160 RCX: 00007f8062230969 RDX: 0000000000000000 RSI: 0000200000000a80 RDI: ffffffffffffff9c RBP: 00007f80622b2ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8062458160 R15: 00007fffcbe727f8 Modules linked in: ---[ end trace abc7cb8e3004ae4f ]--- 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+0x11ff/0x2f10 fs/namei.c:3739 Code: 48 89 df e8 03 81 02 00 49 63 de 48 81 fb 00 f0 ff ff 0f 87 05 f8 ff ff eb 62 e8 bc 31 b7 ff 4c 8b 2c 24 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 6b 0d 00 00 44 8b 33 be 00 00 70 00 44 RSP: 0000:ffffc900012479c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 000000000000000a RCX: 0000000000080000 RDX: ffffc90002792000 RSI: 0000000000001027 RDI: 0000000000001028 RBP: ffffc90001247bd0 R08: dffffc0000000000 R09: ffffed10263844b6 R10: ffffed10263844b6 R11: 1ffff110263844b5 R12: 0000000000000000 R13: ffffc90001247c20 R14: ffff88811c15ca98 R15: dffffc0000000000 FS: 00007f80608576c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000028600000000 CR3: 0000000117823000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 df mov %rbx,%rdi 3: e8 03 81 02 00 call 0x2810b 8: 49 63 de movslq %r14d,%rbx b: 48 81 fb 00 f0 ff ff cmp $0xfffffffffffff000,%rbx 12: 0f 87 05 f8 ff ff ja 0xfffff81d 18: eb 62 jmp 0x7c 1a: e8 bc 31 b7 ff call 0xffb731db 1f: 4c 8b 2c 24 mov (%rsp),%r13 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 6b 0d 00 00 jne 0xda2 37: 44 8b 33 mov (%rbx),%r14d 3a: be 00 00 70 00 mov $0x700000,%esi 3f: 44 rex.R