IPVS: ftp: loaded support on port[0] = 21 detected buffer overflow in memcpy ------------[ cut here ]------------ kernel BUG at lib/string.c:1052! invalid opcode: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 4417 Comm: syz-executor0 Not tainted 4.16.0-rc7+ #279 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fortify_panic+0x13/0x20 lib/string.c:1051 RSP: 0018:ffff8801b0e878f0 EFLAGS: 00010286 RAX: 0000000000000022 RBX: 1ffff100361d0f23 RCX: 0000000000000000 RDX: 0000000000000022 RSI: 1ffff100361d0ed3 RDI: ffffed00361d0f12 RBP: ffff8801b0e878f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000000 R12: ffff8801b0e87998 R13: ffff8801b0e87938 R14: ffff8801b0e87a58 R15: 000000000000fa00 FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000a3f5900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000008138024 CR3: 00000001b1ec1004 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy include/linux/string.h:344 [inline] ucma_join_ip_multicast+0x37a/0x3c0 drivers/infiniband/core/ucma.c:1434 ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1649 __vfs_write+0xef/0x970 fs/read_write.c:480 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f97c99 RSP: 002b:00000000ffede8fc EFLAGS: 00000286 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000f80 RDX: 0000000000000118 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 89 df e8 d2 a7 3f fb eb de 55 48 89 fe 48 c7 c7 c0 43 44 87 48 89 e5 e8 d5 05 f1 fa <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 56 RIP: fortify_panic+0x13/0x20 lib/string.c:1051 RSP: ffff8801b0e878f0 ---[ end trace 00a1ee79070c1e28 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..