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BUG: KMSAN: uninit-value in predicate_parse kernel/trace/trace_events_filter.c:563 [inline]
BUG: KMSAN: uninit-value in process_preds+0x43b6/0x5060 kernel/trace/trace_events_filter.c:1508
CPU: 1 PID: 24084 Comm: syz-executor7 Not tainted 4.17.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
 predicate_parse kernel/trace/trace_events_filter.c:563 [inline]
 process_preds+0x43b6/0x5060 kernel/trace/trace_events_filter.c:1508
 create_filter kernel/trace/trace_events_filter.c:1716 [inline]
 ftrace_profile_set_filter+0x2aa/0x6a0 kernel/trace/trace_events_filter.c:2041
 perf_event_set_filter kernel/events/core.c:9079 [inline]
 _perf_ioctl kernel/events/core.c:5059 [inline]
 perf_ioctl+0x1ca8/0x5870 kernel/events/core.c:5110
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xcbd/0x24b0 fs/ioctl.c:686
 ksys_ioctl fs/ioctl.c:701 [inline]
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x280/0x320 fs/ioctl.c:706
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455a99
RSP: 002b:00007f99bba61c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f99bba626d4 RCX: 0000000000455a99
RDX: 00000000200000c0 RSI: 0000000040082406 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c4e70 R14: 00000000004cc5d0 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:192
 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:318
 __kmalloc+0x13a/0x350 mm/slub.c:3818
 kmalloc include/linux/slab.h:517 [inline]
 predicate_parse kernel/trace/trace_events_filter.c:442 [inline]
 process_preds+0x826/0x5060 kernel/trace/trace_events_filter.c:1508
 create_filter kernel/trace/trace_events_filter.c:1716 [inline]
 ftrace_profile_set_filter+0x2aa/0x6a0 kernel/trace/trace_events_filter.c:2041
 perf_event_set_filter kernel/events/core.c:9079 [inline]
 _perf_ioctl kernel/events/core.c:5059 [inline]
 perf_ioctl+0x1ca8/0x5870 kernel/events/core.c:5110
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0xcbd/0x24b0 fs/ioctl.c:686
 ksys_ioctl fs/ioctl.c:701 [inline]
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x280/0x320 fs/ioctl.c:706
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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