general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 PID: 21638 Comm: syz-executor.5 Not tainted 6.2.0-rc3-next-20230112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:ntfs_lookup+0x16b/0x260 fs/ntfs3/namei.c:96 Code: ff ff e8 38 ae cd fe 48 81 fd 00 f0 ff ff 77 2b e8 5a b1 cd fe 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d3 00 00 00 48 83 7d 20 00 74 54 e8 2f b1 cd fe RSP: 0018:ffffc90004a67880 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 1ffffffff1ce7efe RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff82b40b86 RDI: 0000000000000020 RBP: 0000000000000000 R08: 0000000000000007 R09: fffffffffffff000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880906a2468 R13: ffff88807ee12200 R14: ffff88809064dad0 R15: ffff88809064d918 FS: 00007f695b63e700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000017eb5000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lookup_hash+0x117/0x180 fs/namei.c:1602 do_unlinkat+0x288/0x640 fs/namei.c:4305 do_coredump+0x10b9/0x3ca0 fs/coredump.c:673 get_signal+0x1c08/0x24f0 kernel/signal.c:2845 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:310 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564 RIP: 0033:0x7f695a88c0d1 Code: c4 28 c3 e8 f1 19 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 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00000000200002e0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f695a9abf80 RCX: 00007f695a88c0c9 RDX: 0000000020000300 RSI: 00000000200002e0 RDI: 0000000020002000 RBP: 00007f695a8e7ae9 R08: 0000000020000380 R09: 0000000020000380 R10: 0000000020000340 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fff460766af R14: 00007f695b63e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ntfs_lookup+0x16b/0x260 fs/ntfs3/namei.c:96 Code: ff ff e8 38 ae cd fe 48 81 fd 00 f0 ff ff 77 2b e8 5a b1 cd fe 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d3 00 00 00 48 83 7d 20 00 74 54 e8 2f b1 cd fe RSP: 0018:ffffc90004a67880 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 1ffffffff1ce7efe RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff82b40b86 RDI: 0000000000000020 RBP: 0000000000000000 R08: 0000000000000007 R09: fffffffffffff000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880906a2468 R13: ffff88807ee12200 R14: ffff88809064dad0 R15: ffff88809064d918 FS: 00007f695b63e700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d4b185058 CR3: 0000000017eb5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: e8 38 ae cd fe callq 0xfecdae3d 5: 48 81 fd 00 f0 ff ff cmp $0xfffffffffffff000,%rbp c: 77 2b ja 0x39 e: e8 5a b1 cd fe callq 0xfecdb16d 13: 48 8d 7d 20 lea 0x20(%rbp),%rdi 17: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1e: fc ff df 21: 48 89 fa mov %rdi,%rdx 24: 48 c1 ea 03 shr $0x3,%rdx * 28: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2c: 0f 85 d3 00 00 00 jne 0x105 32: 48 83 7d 20 00 cmpq $0x0,0x20(%rbp) 37: 74 54 je 0x8d 39: e8 2f b1 cd fe callq 0xfecdb16d