general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 14998 Comm: syz-executor.2 Not tainted 6.3.0-rc3-syzkaller-00026-gfff5a5e7f528 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:virtio_transport_purge_skbs+0x139/0x4c0 net/vmw_vsock/virtio_transport_common.c:1370 Code: 00 00 00 00 fc ff df 48 89 c2 48 89 44 24 28 48 c1 ea 03 48 8d 04 1a 48 89 44 24 10 eb 29 e8 ee 27 a3 f7 48 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 a6 02 00 00 49 39 ec 48 8b 55 00 49 89 ef 0f 84 RSP: 0018:ffffc9001438fb48 EFLAGS: 00010256 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffc9000a993000 RDX: 0000000000040000 RSI: ffffffff89dfbd12 RDI: ffff8880349c2518 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52002871f5b R11: 0000000000000000 R12: ffffffff92179188 R13: ffffc9001438fba0 R14: ffff888021b62200 R15: ffff8880349c2500 FS: 00007f6fa4b09700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c006949000 CR3: 0000000064551000 CR4: 0000000000350ef0 Call Trace: vsock_loopback_cancel_pkt+0x1c/0x20 net/vmw_vsock/vsock_loopback.c:48 vsock_transport_cancel_pkt net/vmw_vsock/af_vsock.c:1284 [inline] vsock_connect+0x852/0xcc0 net/vmw_vsock/af_vsock.c:1426 __sys_connect_file+0x153/0x1a0 net/socket.c:2001 __sys_connect+0x165/0x1a0 net/socket.c:2018 __do_sys_connect net/socket.c:2028 [inline] __se_sys_connect net/socket.c:2025 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:2025 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: 0033:0x7f6fa3e8c0f9 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:00007f6fa4b09168 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f6fa3fabf80 RCX: 00007f6fa3e8c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f6fa3ee7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9748c44f R14: 00007f6fa4b09300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:virtio_transport_purge_skbs+0x139/0x4c0 net/vmw_vsock/virtio_transport_common.c:1370 Code: 00 00 00 00 fc ff df 48 89 c2 48 89 44 24 28 48 c1 ea 03 48 8d 04 1a 48 89 44 24 10 eb 29 e8 ee 27 a3 f7 48 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 a6 02 00 00 49 39 ec 48 8b 55 00 49 89 ef 0f 84 RSP: 0018:ffffc9001438fb48 EFLAGS: 00010256 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffc9000a993000 RDX: 0000000000040000 RSI: ffffffff89dfbd12 RDI: ffff8880349c2518 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52002871f5b R11: 0000000000000000 R12: ffffffff92179188 R13: ffffc9001438fba0 R14: ffff888021b62200 R15: ffff8880349c2500 FS: 00007f6fa4b09700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c006949000 CR3: 0000000064551000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 6 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: c2 48 89 retq $0x8948 6: 44 24 28 rex.R and $0x28,%al 9: 48 c1 ea 03 shr $0x3,%rdx d: 48 8d 04 1a lea (%rdx,%rbx,1),%rax 11: 48 89 44 24 10 mov %rax,0x10(%rsp) 16: eb 29 jmp 0x41 18: e8 ee 27 a3 f7 callq 0xf7a3280b 1d: 48 89 e8 mov %rbp,%rax 20: 48 c1 e8 03 shr $0x3,%rax * 24: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 28: 0f 85 a6 02 00 00 jne 0x2d4 2e: 49 39 ec cmp %rbp,%r12 31: 48 8b 55 00 mov 0x0(%rbp),%rdx 35: 49 89 ef mov %rbp,%r15 38: 0f .byte 0xf 39: 84 .byte 0x84