BUG: unable to handle kernel NULL pointer dereference inet_sendmsg+0x19f/0x690 net/ipv4/af_inet.c:798 at 0000000000000000 PGD 1a7cb9067 P4D 1a7cb9067 sock_sendmsg_nosec net/socket.c:645 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:655 PUD 1aedd4067 sock_write_iter+0x35a/0x5a0 net/socket.c:924 PMD 0 Oops: 0010 [#1] SMP KASAN call_write_iter include/linux/fs.h:1793 [inline] do_iter_readv_writev+0x87d/0xa70 fs/read_write.c:680 CPU: 1 PID: 3017 Comm: syz-executor0 Not tainted 4.17.0+ #84 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010: (null) do_iter_write+0x185/0x5f0 fs/read_write.c:959 Code: Bad RIP value. RSP: 0018:ffff8801aaacf590 EFLAGS: 00010246 vfs_writev+0x1c7/0x330 fs/read_write.c:1004 RAX: 0000000000000000 RBX: ffff8801ad2a5800 RCX: 1ffffffff10ea9fd RDX: ffff8801aaacfab0 RSI: ffff8801b3719100 RDI: ffff8801a9f74840 RBP: ffff8801aaacf700 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10035559eb7 R13: ffff8801aaacfab0 R14: ffff8801ad2a5812 R15: ffff8801ad2a5c58 FS: 00007fd1ceee7700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 do_writev+0x112/0x2f0 fs/read_write.c:1039 CR2: ffffffffffffffd6 CR3: 00000001d033d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 __do_sys_writev fs/read_write.c:1112 [inline] __se_sys_writev fs/read_write.c:1109 [inline] __x64_sys_writev+0x75/0xb0 fs/read_write.c:1109 Call Trace: do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b29 Code: sock_poll+0x1d1/0x710 net/socket.c:1168 1d ba fb ff vfs_poll+0x77/0x2a0 fs/select.c:40 c3 do_pollfd fs/select.c:848 [inline] do_poll fs/select.c:896 [inline] do_sys_poll+0x6fd/0x1100 fs/select.c:990 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 __do_sys_poll fs/select.c:1048 [inline] __se_sys_poll fs/select.c:1036 [inline] __x64_sys_poll+0x189/0x510 fs/select.c:1036 48 89 ca do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290 4d 89 c2 4d 89 c8 entry_SYSCALL_64_after_hwframe+0x49/0xbe 4c RIP: 0033:0x455b29 8b Code: 4c 1d 24 ba 08 fb 0f ff 05 c3 <48> 3d 66 01 2e f0 0f ff 1f ff 84 0f 00 83 00 eb 00 b9 00 fb 00 ff 66 c3 90 66 48 2e 89 0f f8 1f 48 84 89 00 f7 00 48 00 89 00 d6 48 RSP: 002b:00007f5258ad0c68 EFLAGS: 00000246 89 ORIG_RAX: 0000000000000014 ca RAX: ffffffffffffffda RBX: 00007f5258ad16d4 RCX: 0000000000455b29 4d RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000014 89 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 c2 4d 89 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015 c8 R13: 00000000004c06bc R14: 00000000004d3cb8 R15: 0000000000000001 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fd1ceee6c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 RAX: ffffffffffffffda RBX: 00007fd1ceee76d4 RCX: 0000000000455b29 RDX: 0000000000000001 RSI: 0000000000000007 RDI: 0000000020000100 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c05f4 R14: 00000000004cfde8 R15: 0000000000000000 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) CR2: 0000000000000000 ---[ end trace 35342e3555bddb45 ]--- RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff8801aaacf590 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8801ad2a5800 RCX: 1ffffffff10ea9fd RDX: ffff8801aaacfab0 RSI: ffff8801b3719100 RDI: ffff8801a9f74840 RBP: ffff8801aaacf700 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10035559eb7 R13: ffff8801aaacfab0 R14: ffff8801ad2a5812 R15: ffff8801ad2a5c58 FS: 00007fd1ceee7700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001d033d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400