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BUG: KMSAN: uninit-value in do_error_trap+0x39b/0x600 arch/x86/kernel/traps.c:297
CPU: 1 PID: 7121 Comm: syz-executor0 Not tainted 4.16.0+ #87
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+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 do_error_trap+0x39b/0x600 arch/x86/kernel/traps.c:297
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:316
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:strp_done+0x13e/0x190 net/strparser/strparser.c:532
RSP: 0018:ffff88014d34fa68 EFLAGS: 00010283
RAX: ffffffff890856be RBX: ffff88014fc9a1d0 RCX: 0000000000040000
RDX: ffffc90001b9a000 RSI: 000000000000002e RDI: 000000000000002f
RBP: ffff88014d34faa0 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: ffff880150760900
R13: 0000000000000000 R14: ffff880150760918 R15: ffff88014fc9a1c8
 kcm_attach net/kcm/kcmsock.c:1428 [inline]
 kcm_attach_ioctl net/kcm/kcmsock.c:1489 [inline]
 kcm_ioctl+0x17c4/0x2a20 net/kcm/kcmsock.c:1695
 sock_do_ioctl+0x13b/0x6b0 net/socket.c:958
 sock_ioctl+0x400/0xca0 net/socket.c:1081
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xaf0/0x2440 fs/ioctl.c:686
 SYSC_ioctl+0x1d2/0x260 fs/ioctl.c:701
 SyS_ioctl+0x54/0x80 fs/ioctl.c:692
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455979
RSP: 002b:00007f94cd38bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f94cd38c6d4 RCX: 0000000000455979
RDX: 0000000020000180 RSI: 00000000000089e0 RDI: 0000000000000015
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000003f0 R14: 00000000006f9f20 R15: 0000000000000000

Local variable description: ----flags.i.i.i.i@__local_bh_enable_ip
Variable was created at:
 __local_bh_enable_ip+0x3b/0x140 kernel/softirq.c:159
 __raw_write_unlock_bh include/linux/rwlock_api_smp.h:275 [inline]
 _raw_write_unlock_bh+0x57/0x6c kernel/locking/spinlock.c:344
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