Hello, syzbot found the following issue on: HEAD commit: d12d7e1cfe38 Add linux-next specific files for 20220411 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=120d568f700000 kernel config: https://syzkaller.appspot.com/x/.config?x=58fcaf7d8df169a6 dashboard link: https://syzkaller.appspot.com/bug?extid=5c550b7ec6a56f70c32d compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17903a8f700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17f03688f00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5c550b7ec6a56f70c32d@xxxxxxxxxxxxxxxxxxxxxxxxx L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057] CPU: 1 PID: 3586 Comm: syz-executor395 Not tainted 5.18.0-rc1-next-20220411-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__dentry_path+0x215/0x740 fs/d_path.c:342 Code: be 09 31 ff 41 89 ed 41 83 e5 01 44 89 ee e8 22 fe 96 ff 45 85 ed 75 ce e8 f8 fb 96 ff 48 8b 44 24 20 89 6c 24 18 48 c1 e8 03 <42> 80 3c 30 00 0f 85 d2 04 00 00 48 8b 44 24 10 83 e5 01 89 6c 24 RSP: 0018:ffffc9000376fc30 EFLAGS: 00010206 RAX: 000000000000000a RBX: ffffffff8ba14680 RCX: 0000000000000000 RDX: ffff888025001d40 RSI: ffffffff81e30a28 RDI: 0000000000000003 RBP: 0000000000000a8c R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81e309e5 R11: 0000000000000001 R12: 0000000000000fff R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88805610cfff FS: 000055555682c300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000561836ba9d20 CR3: 000000001d922000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> dentry_path_raw+0xc2/0x110 fs/d_path.c:367 kvm_uevent_notify_change.part.0+0x215/0x450 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5492 kvm_uevent_notify_change arch/x86/kvm/../../../virt/kvm/kvm_main.c:5459 [inline] kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1198 [inline] kvm_put_kvm+0xf7/0xb70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1264 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4795 [inline] kvm_dev_ioctl+0x85d/0x1c70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4811 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f8a6670d009 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffded420398 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8a6670d009 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 00007f8a666d0ff0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8a666d1080 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__dentry_path+0x215/0x740 fs/d_path.c:342 Code: be 09 31 ff 41 89 ed 41 83 e5 01 44 89 ee e8 22 fe 96 ff 45 85 ed 75 ce e8 f8 fb 96 ff 48 8b 44 24 20 89 6c 24 18 48 c1 e8 03 <42> 80 3c 30 00 0f 85 d2 04 00 00 48 8b 44 24 10 83 e5 01 89 6c 24 RSP: 0018:ffffc9000376fc30 EFLAGS: 00010206 RAX: 000000000000000a RBX: ffffffff8ba14680 RCX: 0000000000000000 RDX: ffff888025001d40 RSI: ffffffff81e30a28 RDI: 0000000000000003 RBP: 0000000000000a8c R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81e309e5 R11: 0000000000000001 R12: 0000000000000fff R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88805610cfff FS: 000055555682c300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000561836ba0d90 CR3: 000000001d922000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: be 09 31 ff 41 mov $0x41ff3109,%esi 5: 89 ed mov %ebp,%ebp 7: 41 83 e5 01 and $0x1,%r13d b: 44 89 ee mov %r13d,%esi e: e8 22 fe 96 ff callq 0xff96fe35 13: 45 85 ed test %r13d,%r13d 16: 75 ce jne 0xffffffe6 18: e8 f8 fb 96 ff callq 0xff96fc15 1d: 48 8b 44 24 20 mov 0x20(%rsp),%rax 22: 89 6c 24 18 mov %ebp,0x18(%rsp) 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 0f 85 d2 04 00 00 jne 0x507 35: 48 8b 44 24 10 mov 0x10(%rsp),%rax 3a: 83 e5 01 and $0x1,%ebp 3d: 89 .byte 0x89 3e: 6c insb (%dx),%es:(%rdi) 3f: 24 .byte 0x24 --- This report is generated by a bot. 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