name failslab, interval 1, probability 0, space 0, times 1
 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]
 __kmalloc+0xc2/0x350 mm/slub.c:3785
==================================================================
BUG: KMSAN: uninit-value in show_trace_log_lvl+0xda4/0x1030 arch/x86/kernel/dumpstack.c:203
CPU: 0 PID: 7511 Comm: syz-executor1 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
 show_trace_log_lvl+0xda4/0x1030 arch/x86/kernel/dumpstack.c:203
 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]
 __kmalloc+0xc2/0x350 mm/slub.c:3785
 kmalloc include/linux/slab.h:517 [inline]
 sock_kmalloc+0x14e/0x270 net/core/sock.c:1986
 ip_mc_join_group+0x57b/0x800 net/ipv4/igmp.c:2168
 do_ip_setsockopt+0x1efc/0x5370 net/ipv4/ip_sockglue.c:992
 ip_setsockopt+0x134/0x2b0 net/ipv4/ip_sockglue.c:1254
 tcp_setsockopt+0x1bb/0x1f0 net/ipv4/tcp.c:2905
 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: 0033:0x455259
RSP: 002b:00007efcb9fa4c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007efcb9fa56d4 RCX: 0000000000455259
RDX: 0000000000000027 RSI: 0000000000000000 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 000000000000000c R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000570 R14: 00000000006fb320 R15: 0000000000000000

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:293 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:521
 update_stack_state+0x9e2/0xa40 arch/x86/kernel/unwind_frame.c:261
 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]
 __kmalloc+0xc2/0x350 mm/slub.c:3785
 kmalloc include/linux/slab.h:517 [inline]
 sock_kmalloc+0x14e/0x270 net/core/sock.c:1986
 ip_mc_join_group+0x57b/0x800 net/ipv4/igmp.c:2168
 do_ip_setsockopt+0x1efc/0x5370 net/ipv4/ip_sockglue.c:992
 ip_setsockopt+0x134/0x2b0 net/ipv4/ip_sockglue.c:1254
 tcp_setsockopt+0x1bb/0x1f0 net/ipv4/tcp.c:2905
 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
Local variable description: ----fl4@__ip_dev_find
Variable was created at:
 __ip_dev_find+0x6d/0x5e0 net/ipv4/devinet.c:139
 ip_mc_find_dev+0x16f/0x420 net/ipv4/igmp.c:1792
==================================================================