Hello, syzbot found the following issue on: HEAD commit: 933174ae28ba Merge tag 'spi-fix-v6.4-rc3' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=138d4ae5280000 kernel config: https://syzkaller.appspot.com/x/.config?x=f389ffdf4e9ba3f0 dashboard link: https://syzkaller.appspot.com/bug?extid=d0d442c22fa8db45ff0e compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/21a81b8c2660/disk-933174ae.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b4951d89e238/vmlinux-933174ae.xz kernel image: https://storage.googleapis.com/syzbot-assets/21eb405303cc/bzImage-933174ae.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d0d442c22fa8db45ff0e@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 0 PID: 29845 Comm: syz-executor.4 Not tainted 6.4.0-rc3-syzkaller-00032-g933174ae28ba #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023 RIP: 0010:vhost_work_queue drivers/vhost/vhost.c:259 [inline] RIP: 0010:vhost_work_queue+0xfc/0x150 drivers/vhost/vhost.c:248 Code: 00 00 fc ff df 48 89 da 48 c1 ea 03 80 3c 02 00 75 56 48 b8 00 00 00 00 00 fc ff df 48 8b 1b 48 8d 7b 70 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 42 48 8b 7b 70 e8 95 9e ae f9 5b 5d 41 5c 41 5d e9 RSP: 0018:ffffc9000333faf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000d84d000 RDX: 000000000000000e RSI: ffffffff841221d7 RDI: 0000000000000070 RBP: ffff88804b6b95b0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88804b6b00b0 R13: 0000000000000000 R14: ffff88804b6b95e0 R15: ffff88804b6b95c8 FS: 00007f3b445ec700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e423000 CR3: 000000005d734000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: <TASK> vhost_transport_send_pkt+0x268/0x520 drivers/vhost/vsock.c:288 virtio_transport_send_pkt_info+0x54c/0x820 net/vmw_vsock/virtio_transport_common.c:250 virtio_transport_connect+0xb1/0xf0 net/vmw_vsock/virtio_transport_common.c:813 vsock_connect+0x37f/0xcd0 net/vmw_vsock/af_vsock.c:1414 __sys_connect_file+0x153/0x1a0 net/socket.c:2003 __sys_connect+0x165/0x1a0 net/socket.c:2020 __do_sys_connect net/socket.c:2030 [inline] __se_sys_connect net/socket.c:2027 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:2027 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3b4388c169 Code: 28 00 00 00 75 05 48 83 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 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3b445ec168 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f3b439ac050 RCX: 00007f3b4388c169 RDX: 0000000000000010 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f3b438e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3b43acfb1f R14: 00007f3b445ec300 R15: 0000000000022000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vhost_work_queue drivers/vhost/vhost.c:259 [inline] RIP: 0010:vhost_work_queue+0xfc/0x150 drivers/vhost/vhost.c:248 Code: 00 00 fc ff df 48 89 da 48 c1 ea 03 80 3c 02 00 75 56 48 b8 00 00 00 00 00 fc ff df 48 8b 1b 48 8d 7b 70 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 42 48 8b 7b 70 e8 95 9e ae f9 5b 5d 41 5c 41 5d e9 RSP: 0018:ffffc9000333faf8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000d84d000 RDX: 000000000000000e RSI: ffffffff841221d7 RDI: 0000000000000070 RBP: ffff88804b6b95b0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88804b6b00b0 R13: 0000000000000000 R14: ffff88804b6b95e0 R15: ffff88804b6b95c8 FS: 00007f3b445ec700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e428000 CR3: 000000005d734000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: 48 89 da mov %rbx,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 75 56 jne 0x63 d: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 14: fc ff df 17: 48 8b 1b mov (%rbx),%rbx 1a: 48 8d 7b 70 lea 0x70(%rbx),%rdi 1e: 48 89 fa mov %rdi,%rdx 21: 48 c1 ea 03 shr $0x3,%rdx * 25: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 29: 75 42 jne 0x6d 2b: 48 8b 7b 70 mov 0x70(%rbx),%rdi 2f: e8 95 9e ae f9 callq 0xf9ae9ec9 34: 5b pop %rbx 35: 5d pop %rbp 36: 41 5c pop %r12 38: 41 5d pop %r13 3a: e9 .byte 0xe9 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
