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: 333 Comm: syz-executor.0 Not tainted 5.15.185-syzkaller-1080656-g41b0e17cc2ca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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 2c 27 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: 0018:ffffc90000d179c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88810d962780 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff88810d962780 RBP: ffffc90000d17bd0 R08: dffffc0000000000 R09: ffffed102419e360 R10: ffffed102419e360 R11: 1ffff1102419e35f R12: 0000000000000000 R13: ffffc90000d17c20 R14: ffff88810c79de18 R15: dffffc0000000000 FS: 00007f6f067956c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6f06c7f244 CR3: 000000011d962000 CR4: 00000000003506b0 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: 0033:0x7f6f06c12ae9 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:00007f6f067950c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f6f06d31f80 RCX: 00007f6f06c12ae9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007f6f06c5e47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f6f06d31f80 R15: 00007ffe71109278 Modules linked in: ---[ end trace 17bb874098d2264c ]--- 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 2c 27 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: 0018:ffffc90000d179c0 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88810d962780 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff88810d962780 RBP: ffffc90000d17bd0 R08: dffffc0000000000 R09: ffffed102419e360 R10: ffffed102419e360 R11: 1ffff1102419e35f R12: 0000000000000000 R13: ffffc90000d17c20 R14: ffff88810c79de18 R15: dffffc0000000000 FS: 00007f6f067956c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005652e6da0890 CR3: 000000011d962000 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 2c 27 b7 ff call 0xffb7274b 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