kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 14011 Comm: syz-executor.5 Not tainted 4.14.145 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88805e0bc340 task.stack: ffff88808ad48000 RIP: 0010:tcp_sendmsg_locked+0x50e/0x3200 net/ipv4/tcp.c:1281 RSP: 0018:ffff88808ad4f9b0 EFLAGS: 00010206 RAX: 0000000000000012 RBX: 0000000000000000 RCX: ffffc9000601e000 RDX: 000000000000011c RSI: ffffffff85240e44 RDI: 0000000000000090 RBP: ffff88808ad4fb48 R08: ffff88805e0bc340 R09: 0000000000000001 R10: 0000000000000000 R11: ffff88805e0bc340 R12: dffffc0000000000 R13: ffff88808eae1c80 R14: ffff88808ad4fc28 R15: ffff888068ccaf40 FS: 00007ffbb7938700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc4c433c8 CR3: 000000009bea8000 CR4: 00000000001406f0 kobject: 'loop4' (ffff8880a4a1e160): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject: 'loop4' (ffff8880a4a1e160): fill_kobj_path: path = '/devices/virtual/block/loop4' tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1457 inet_sendmsg+0x122/0x500 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 sock_write_iter+0x21d/0x390 net/socket.c:925 call_write_iter include/linux/fs.h:1777 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x4a7/0x6b0 fs/read_write.c:482 vfs_write+0x198/0x500 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xfd/0x230 fs/read_write.c:582 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4598e9 RSP: 002b:00007ffbb7937c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9 RDX: 00000000fffffffe RSI: 0000000020000380 RDI: 0000000000000009 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffbb79386d4 R13: 00000000004c5e50 R14: 00000000004e04b8 R15: 00000000ffffffff Code: d4 38 fc 4d 85 ed 0f 84 40 08 00 00 e8 ac d4 38 fc 8b 85 78 ff ff ff 48 8d bb 90 00 00 00 89 85 50 ff ff ff 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 06 0f 8e 4a 25 00 00 f6 83 90 00 00 00 RIP: tcp_sendmsg_locked+0x50e/0x3200 net/ipv4/tcp.c:1281 RSP: ffff88808ad4f9b0 ---[ end trace 6a8d166c6f38f92a ]--- kobject: 'loop2' (ffff8880a498f1a0): kobject_uevent_env