Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
 should_failslab+0x279/0x2a0 mm/failslab.c:32
==================================================================
BUG: KMSAN: uninit-value in on_stack arch/x86/include/asm/stacktrace.h:44 [inline]
BUG: KMSAN: uninit-value in update_stack_state+0x4ec/0xa40 arch/x86/kernel/unwind_frame.c:238
CPU: 0 PID: 10363 Comm: syz-executor2 Not tainted 4.16.0+ #83
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x14a/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
 on_stack arch/x86/include/asm/stacktrace.h:44 [inline]
 update_stack_state+0x4ec/0xa40 arch/x86/kernel/unwind_frame.c:238
 unwind_next_frame+0x618/0xe50 arch/x86/kernel/unwind_frame.c:329
 show_trace_log_lvl+0xb49/0x1030 arch/x86/kernel/dumpstack.c:212
 show_stack+0xfc/0x150 arch/x86/kernel/dumpstack.c:236
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
 should_failslab+0x279/0x2a0 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc_node mm/slub.c:2663 [inline]
 slab_alloc mm/slub.c:2745 [inline]
 kmem_cache_alloc+0x136/0xb90 mm/slub.c:2750
 dst_alloc+0x295/0x830 net/core/dst.c:104
 rt_dst_alloc net/ipv4/route.c:1520 [inline]
 __mkroute_output net/ipv4/route.c:2265 [inline]
 ip_route_output_key_hash_rcu+0x2ba3/0x3940 net/ipv4/route.c:2493
 ip_route_output_key_hash net/ipv4/route.c:2322 [inline]
 __ip_route_output_key include/net/route.h:126 [inline]
 ip_route_output_flow+0x1eb/0x3c0 net/ipv4/route.c:2577
 ip_route_output_key include/net/route.h:136 [inline]
 ip_route_output include/net/route.h:148 [inline]
 ip_mc_find_dev+0x24f/0x420 net/ipv4/igmp.c:1798
 ip_mc_join_group+0x1ac/0x800 net/ipv4/igmp.c:2150
 do_ip_setsockopt+0x351a/0x5370 net/ipv4/ip_sockglue.c:930
 ip_setsockopt+0x134/0x2b0 net/ipv4/ip_sockglue.c:1254
 udp_setsockopt+0x108/0x1b0 net/ipv4/udp.c:2406
 sock_common_setsockopt+0x136/0x170 net/core/sock.c:2975
 SYSC_setsockopt+0x4b8/0x570 net/socket.c:1849
 SyS_setsockopt+0x76/0xa0 net/socket.c:1828
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455319
RSP: 002b:00007fe9f167ec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fe9f167f6d4 RCX: 0000000000455319
RDX: 0000000000000023 RSI: 0000000000000000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000008 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000014
R13: 000000000000056f R14: 00000000006fb308 R15: 0000000000000000

Local variable description: ----success.i.i.i@should_fail
Variable was created at:
 should_fail+0x57/0xab0 lib/fault-inject.c:109
 should_failslab+0x279/0x2a0 mm/failslab.c:32
==================================================================