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BUG: KASAN: slab-out-of-bounds in ether_addr_equal include/linux/etherdevice.h:322 [inline]
BUG: KASAN: slab-out-of-bounds in ether_addr_equal_unaligned include/linux/etherdevice.h:376 [inline]
BUG: KASAN: slab-out-of-bounds in batadv_compare_eth net/batman-adv/main.h:283 [inline]
BUG: KASAN: slab-out-of-bounds in batadv_interface_tx+0x1638/0x1880 net/batman-adv/soft-interface.c:265
Read of size 4 at addr ffff8880a74b87ff by task syz-executor4/10907

CPU: 1 PID: 10907 Comm: syz-executor4 Not tainted 5.0.0-rc3+ #37
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+0x1db/0x2d0 lib/dump_stack.c:113
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:134
 ether_addr_equal include/linux/etherdevice.h:322 [inline]
 ether_addr_equal_unaligned include/linux/etherdevice.h:376 [inline]
 batadv_compare_eth net/batman-adv/main.h:283 [inline]
 batadv_interface_tx+0x1638/0x1880 net/batman-adv/soft-interface.c:265
 __netdev_start_xmit include/linux/netdevice.h:4382 [inline]
 netdev_start_xmit include/linux/netdevice.h:4391 [inline]
 dev_direct_xmit+0x368/0x670 net/core/dev.c:3930
 packet_direct_xmit+0xfb/0x170 net/packet/af_packet.c:246
 packet_snd net/packet/af_packet.c:2933 [inline]
 packet_sendmsg+0x27fb/0x6920 net/packet/af_packet.c:2958
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:631
 __sys_sendto+0x387/0x5f0 net/socket.c:1788
 __do_sys_sendto net/socket.c:1800 [inline]
 __se_sys_sendto net/socket.c:1796 [inline]
 __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa2d9d83c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458099
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: fffffffffffffffc R11: 0000000000000246 R12: 00007fa2d9d846d4
R13: 00000000004c5710 R14: 00000000004d94e0 R15: 00000000ffffffff

Allocated by task 1:
 save_stack+0x45/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_kmalloc mm/kasan/common.c:496 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469
 kasan_kmalloc mm/kasan/common.c:504 [inline]
 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:411
 kmem_cache_alloc+0x12d/0x710 mm/slab.c:3543
 __trace_define_field+0x9f/0x430 kernel/trace/trace_events.c:118
 trace_define_field+0xbb/0x110 kernel/trace/trace_events.c:149
 trace_event_define_fields_ext4_remove_blocks+0x36/0x294 include/trace/events/ext4.h:2058
 event_create_dir+0x81b/0x13d0 kernel/trace/trace_events.c:2004
 __trace_early_add_event_dirs kernel/trace/trace_events.c:2854 [inline]
 early_event_add_tracer kernel/trace/trace_events.c:3017 [inline]
 event_trace_init+0x395/0x50e kernel/trace/trace_events.c:3176
 tracer_init_tracefs+0x11a/0x269 kernel/trace/trace.c:8210
 do_one_initcall+0x129/0x937 init/main.c:888
 do_initcall_level init/main.c:956 [inline]
 do_initcalls init/main.c:964 [inline]
 do_basic_setup init/main.c:982 [inline]
 kernel_init_freeable+0x4d5/0x5c4 init/main.c:1135
 kernel_init+0x12/0x1c5 init/main.c:1055
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8880a74b87c0
 which belongs to the cache ftrace_event_field of size 48
The buggy address is located 15 bytes to the right of
 48-byte region [ffff8880a74b87c0, ffff8880a74b87f0)
The buggy address belongs to the page:
page:ffffea00029d2e00 count:1 mapcount:0 mapping:ffff88812c3eb840 index:0xffff8880a74b8fc1
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea00029d2dc8 ffffea00029d2e48 ffff88812c3eb840
raw: ffff8880a74b8fc1 ffff8880a74b8000 000000010000003f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880a74b8680: 00 00 00 00 00 00 fc fc 00 00 00 00 00 00 fc fc
 ffff8880a74b8700: 00 00 00 00 00 00 fc fc 00 00 00 00 00 00 fc fc
>ffff8880a74b8780: 00 00 00 00 00 00 fc fc 00 00 00 00 00 00 fc fc
                                                                ^
 ffff8880a74b8800: 00 00 00 00 00 00 fc fc 00 00 00 00 00 00 fc fc
 ffff8880a74b8880: 00 00 00 00 00 00 fc fc 00 00 00 00 00 00 fc fc
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