__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]
 kmem_cache_alloc_node+0x151/0xc70 mm/slub.c:2779
==================================================================
BUG: KMSAN: uninit-value in show_trace_log_lvl+0xda4/0x1030 arch/x86/kernel/dumpstack.c:203
CPU: 1 PID: 6706 Comm: syz-executor3 Not tainted 4.16.0+ #82
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]
 kmem_cache_alloc_node+0x151/0xc70 mm/slub.c:2779
 __alloc_skb+0x203/0x9f0 net/core/skbuff.c:194
 alloc_skb include/linux/skbuff.h:984 [inline]
 pfkey_sendmsg+0x29e/0x1950 net/key/af_key.c:3645
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg net/socket.c:640 [inline]
 ___sys_sendmsg+0xec0/0x1310 net/socket.c:2046
 __sys_sendmmsg+0x42d/0x800 net/socket.c:2136
 SYSC_sendmmsg+0xc4/0x110 net/socket.c:2167
 SyS_sendmmsg+0x63/0x90 net/socket.c:2162
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455259
RSP: 002b:00007f025c794c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f025c7956d4 RCX: 0000000000455259
RDX: 0000000000000001 RSI: 0000000020006f00 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000080 R11: 0000000000000246 R12: 0000000000000014
R13: 00000000000004ca R14: 00000000006fa390 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]
 kmem_cache_alloc_node+0x151/0xc70 mm/slub.c:2779
 __alloc_skb+0x203/0x9f0 net/core/skbuff.c:194
 alloc_skb include/linux/skbuff.h:984 [inline]
 pfkey_sendmsg+0x29e/0x1950 net/key/af_key.c:3645
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg net/socket.c:640 [inline]
 ___sys_sendmsg+0xec0/0x1310 net/socket.c:2046
 __sys_sendmmsg+0x42d/0x800 net/socket.c:2136
 SYSC_sendmmsg+0xc4/0x110 net/socket.c:2167
 SyS_sendmmsg+0x63/0x90 net/socket.c:2162
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Local variable description: ----oldbit.i.i.i@kfree
Variable was created at:
 kfree+0xcb/0x29e0 mm/slub.c:3931
 kfree_link+0x37/0x40 fs/libfs.c:1066
==================================================================