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BUG: KASAN: slab-out-of-bounds in predicate_parse kernel/trace/trace_events_filter.c:562 [inline]
BUG: KASAN: slab-out-of-bounds in process_preds+0x1905/0x19d0 kernel/trace/trace_events_filter.c:1505
Read of size 4 at addr ffff8801bd62bff0 by task syz-executor0/6462

CPU: 1 PID: 6462 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #1
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+0x1b9/0x294 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
 predicate_parse kernel/trace/trace_events_filter.c:562 [inline]
 process_preds+0x1905/0x19d0 kernel/trace/trace_events_filter.c:1505
 create_filter+0x155/0x270 kernel/trace/trace_events_filter.c:1713
 ftrace_profile_set_filter+0x130/0x2e0 kernel/trace/trace_events_filter.c:2038
 perf_event_set_filter+0x248/0x1230 kernel/events/core.c:9079
 _perf_ioctl+0x84c/0x15e0 kernel/events/core.c:5059
 perf_ioctl+0x59/0x80 kernel/events/core.c:5110
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455979
RSP: 002b:00007fd9f226cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd9f226d6d4 RCX: 0000000000455979
RDX: 0000000020000140 RSI: 0000000040082406 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000002bf R14: 00000000006f8288 R15: 0000000000000000

Allocated by task 4588:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 __do_kmalloc_node mm/slab.c:3682 [inline]
 __kmalloc_node+0x47/0x70 mm/slab.c:3689
 kmalloc_node include/linux/slab.h:554 [inline]
 __vmalloc_area_node mm/vmalloc.c:1686 [inline]
 __vmalloc_node_range+0x1f5/0x750 mm/vmalloc.c:1759
 __vmalloc_node mm/vmalloc.c:1804 [inline]
 vmalloc_user+0x75/0x170 mm/vmalloc.c:1874
 kcov_mmap+0x2e/0x150 kernel/kcov.c:278
 call_mmap include/linux/fs.h:1789 [inline]
 mmap_region+0xd5c/0x1870 mm/mmap.c:1732
 do_mmap+0xc79/0x11d0 mm/mmap.c:1503
 do_mmap_pgoff include/linux/mm.h:2237 [inline]
 vm_mmap_pgoff+0x1fb/0x2a0 mm/util.c:357
 ksys_mmap_pgoff+0x4c9/0x640 mm/mmap.c:1553
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline]
 __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801bd62a140
 which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 3760 bytes to the right of
 4096-byte region [ffff8801bd62a140, ffff8801bd62b140)
The buggy address belongs to the page:
page:ffffea0006f58a80 count:1 mapcount:0 mapping:ffff8801bd62a140 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801bd62a140 0000000000000000 0000000100000001
raw: ffffea000717d8a0 ffffea00070176a0 ffff8801da800dc0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801bd62be80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801bd62bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8801bd62bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff8801bd62c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801bd62c080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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