general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf] CPU: 0 PID: 8661 Comm: syz-executor.2 Not tainted 5.7.0-rc7-next-20200529-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__tipc_sendstream+0xbc1/0x11d0 net/tipc/socket.c:1591 Code: 00 00 00 00 48 39 5c 24 28 48 0f 44 d8 e8 87 1a cf f9 48 b8 00 00 00 00 00 fc ff df 48 8d bb c8 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e2 04 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 RSP: 0018:ffffc900019b7808 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000d6fa000 RDX: 0000000000000019 RSI: ffffffff87a3e119 RDI: 00000000000000c8 RBP: ffff88805f40a740 R08: ffff888097d0e240 R09: 0000000000000001 R10: ffffffff8c588b37 R11: fffffbfff18b1166 R12: ffff88805f40ac7e R13: 0000000000000000 R14: ffff88805d816000 R15: 0000000000000000 FS: 00007f6b49589700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020236fc8 CR3: 0000000096631000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tipc_sendstream+0x4c/0x70 net/tipc/socket.c:1533 tipc_send_packet+0x3c/0x60 net/tipc/socket.c:1634 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x32f/0x810 net/socket.c:2352 ___sys_sendmsg+0x100/0x170 net/socket.c:2406 __sys_sendmmsg+0x195/0x480 net/socket.c:2496 __do_sys_sendmmsg net/socket.c:2525 [inline] __se_sys_sendmmsg net/socket.c:2522 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2522 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca59 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6b49588c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00000000004fcfe0 RCX: 000000000045ca59 RDX: 000000000000013c RSI: 0000000020236fc8 RDI: 0000000000000005 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008f5 R14: 00000000004cbc3e R15: 00007f6b495896d4 Modules linked in: ---[ end trace 6b87020e91f8c9ec ]--- RIP: 0010:__tipc_sendstream+0xbc1/0x11d0 net/tipc/socket.c:1591 Code: 00 00 00 00 48 39 5c 24 28 48 0f 44 d8 e8 87 1a cf f9 48 b8 00 00 00 00 00 fc ff df 48 8d bb c8 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e2 04 00 00 48 8b 9b c8 00 00 00 48 b8 00 00 00 RSP: 0018:ffffc900019b7808 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000d6fa000 RDX: 0000000000000019 RSI: ffffffff87a3e119 RDI: 00000000000000c8 RBP: ffff88805f40a740 R08: ffff888097d0e240 R09: 0000000000000001 R10: ffffffff8c588b37 R11: fffffbfff18b1166 R12: ffff88805f40ac7e R13: 0000000000000000 R14: ffff88805d816000 R15: 0000000000000000 FS: 00007f6b49589700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffc9cb1fa0 CR3: 0000000096631000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400