------------[ cut here ]------------
WARNING: CPU: 1 PID: 4752 at lib/list_debug.c:36 assoc_array_insert_into_terminal_node /syzkaller/managers/android-49-kasan-gce/kernel/lib/assoc_array.c:818 [inline]
WARNING: CPU: 1 PID: 4752 at lib/list_debug.c:36 __list_add+0x169/0x1c0 /syzkaller/managers/android-49-kasan-gce/kernel/lib/assoc_array.c:1033
capability: warning: `syz-executor3' uses deprecated v2 capabilities in a way that may be insecure
list_add double add: new=ffff8801952adb68, prev=ffff8801952adb68, next=ffffffff84833fe0.
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4752 Comm: syz-executor7 Not tainted 4.9.41-gdb02484 #20
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801986879d8 ffffffff81d92609 ffffffff83a46b40 ffff880198687ab0
 ffffffff83c17200 ffffffff81df9a79 0000000000000009 ffff880198687aa0
 ffffffff8142ddf1 0000000041b58ab3 ffffffff84184100 ffffffff8142dc35
Call Trace:
 [<ffffffff81d92609>] dump_stack+0xc1/0x128 /syzkaller/managers/android-49-kasan-gce/kernel/block/blk-integrity.c:49
 [<ffffffff8142ddf1>] panic+0x1bc/0x3a8 /syzkaller/managers/android-49-kasan-gce/kernel/kernel/events/callchain.c:57
 [<ffffffff81131e54>] __warn+0x1c4/0x1e0 /syzkaller/managers/android-49-kasan-gce/kernel/kernel/panic.c:542
 [<ffffffff81131f34>] warn_slowpath_fmt+0xc4/0x110 /syzkaller/managers/android-49-kasan-gce/kernel/kernel/panic.c:565
 [<ffffffff81df9a79>] assoc_array_insert_into_terminal_node /syzkaller/managers/android-49-kasan-gce/kernel/lib/assoc_array.c:818 [inline]
 [<ffffffff81df9a79>] __list_add+0x169/0x1c0 /syzkaller/managers/android-49-kasan-gce/kernel/lib/assoc_array.c:1033
 [<ffffffff82a355f0>] input_register_handler+0xa0/0x150 /syzkaller/managers/android-49-kasan-gce/kernel/drivers/input/input.c:1338
 [<ffffffff82a738c2>] keychord_write+0x582/0x820 /syzkaller/managers/android-49-kasan-gce/kernel/drivers/input/misc/gpio_input.c:303
 [<ffffffff8156a133>] SYSC_faccessat /syzkaller/managers/android-49-kasan-gce/kernel/fs/open.c:385 [inline]
 [<ffffffff8156a133>] __vfs_write+0x103/0x680 /syzkaller/managers/android-49-kasan-gce/kernel/fs/open.c:363
 [<ffffffff8156e260>] vfs_write+0x170/0x4e0 /syzkaller/managers/android-49-kasan-gce/kernel/fs/read_write.c:1765
 [<ffffffff81571c59>] SyS_write+0xd9/0x1b0 /syzkaller/managers/android-49-kasan-gce/kernel/fs/read_write.c:898
 [<ffffffff838a5985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..