keychord: using input dev AT Translated Set 2 keyboard for fevent
==================================================================
BUG: Double free or freeing an invalid pointer
Unexpected shadow byte: 0xFB
CPU: 1 PID: 3412 Comm: syz-executor3 Not tainted 4.9.39-g5b07c2d #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801ca1e7b70 ffffffff81eacd59 ffff8801dac01c80 ffff8801cbc637b0
 ffff8801cbc637b8 ffffffff82b495cc 0000000000000282 ffff8801ca1e7b98
 ffffffff81546bfc 00000000fffffffb ffff8801dac01c80 ffff8801cbc637b0
Call Trace:
 [<ffffffff81eacd59>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eacd59>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81546bfc>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160
 [<ffffffff81547404>] kasan_report_double_free+0x44/0x60 mm/kasan/report.c:181
 [<ffffffff815467ed>] kasan_slab_free+0x9d/0xc0 mm/kasan/kasan.c:562
 [<ffffffff815427f0>] slab_free_hook mm/slub.c:1355 [inline]
 [<ffffffff815427f0>] slab_free_freelist_hook mm/slub.c:1377 [inline]
 [<ffffffff815427f0>] slab_free mm/slub.c:2958 [inline]
 [<ffffffff815427f0>] kfree+0xf0/0x2f0 mm/slub.c:3878
 [<ffffffff82b495cc>] keychord_write+0x5fc/0x7d0 drivers/input/misc/keychord.c:303
 [<ffffffff81572d6b>] __vfs_write+0xfb/0x660 fs/read_write.c:510
 [<ffffffff81576df0>] vfs_write+0x170/0x4e0 fs/read_write.c:560
 [<ffffffff8157a724>] SYSC_write fs/read_write.c:607 [inline]
 [<ffffffff8157a724>] SyS_write+0xd4/0x1a0 fs/read_write.c:599
 [<ffffffff839658c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Object at ffff8801cbc637b0, in cache kmalloc-8 size: 8
Allocated:
PID = 3412
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598
 __kmalloc+0x128/0x320 mm/slub.c:3741
 kmalloc include/linux/slab.h:495 [inline]
 kzalloc include/linux/slab.h:636 [inline]
 keychord_write+0x6d/0x7d0 drivers/input/misc/keychord.c:241
 __vfs_write+0xfb/0x660 fs/read_write.c:510
 vfs_write+0x170/0x4e0 fs/read_write.c:560
 SYSC_write fs/read_write.c:607 [inline]
 SyS_write+0xd4/0x1a0 fs/read_write.c:599
 entry_SYSCALL_64_fastpath+0x23/0xc6
Freed:
PID = 3422
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571
 slab_free_hook mm/slub.c:1355 [inline]
 slab_free_freelist_hook mm/slub.c:1377 [inline]
 slab_free mm/slub.c:2958 [inline]
 kfree+0xf0/0x2f0 mm/slub.c:3878
 keychord_write+0x150/0x7d0 drivers/input/misc/keychord.c:259
 __vfs_write+0xfb/0x660 fs/read_write.c:510
 vfs_write+0x170/0x4e0 fs/read_write.c:560
 SYSC_write fs/read_write.c:607 [inline]
 SyS_write+0xd4/0x1a0 fs/read_write.c:599
 entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
==================================================================
keychord: using input dev AT Translated Set 2 keyboard for fevent
BUG: Double free or freeing an invalid pointer
Unexpected shadow byte: 0xFB
CPU: 0 PID: 3416 Comm: syz-executor7 Tainted: G    B           4.9.39-g5b07c2d #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c99f7b70 ffffffff81eacd59 ffff8801dac01c80 ffff8801cc7e65a0
 ffff8801cc7e65a8 ffffffff82b495cc 0000000000000282 ffff8801c99f7b98
 ffffffff81546bfc 00000000fffffffb ffff8801dac01c80 ffff8801cc7e65a0
Call Trace:
 [<ffffffff81eacd59>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eacd59>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81546bfc>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160
 [<ffffffff81547404>] kasan_report_double_free+0x44/0x60 mm/kasan/report.c:181
 [<ffffffff815467ed>] kasan_slab_free+0x9d/0xc0 mm/kasan/kasan.c:562
 [<ffffffff815427f0>] slab_free_hook mm/slub.c:1355 [inline]
 [<ffffffff815427f0>] slab_free_freelist_hook mm/slub.c:1377 [inline]
 [<ffffffff815427f0>] slab_free mm/slub.c:2958 [inline]
 [<ffffffff815427f0>] kfree+0xf0/0x2f0 mm/slub.c:3878
 [<ffffffff82b495cc>] keychord_write+0x5fc/0x7d0 drivers/input/misc/keychord.c:303
 [<ffffffff81572d6b>] __vfs_write+0xfb/0x660 fs/read_write.c:510
 [<ffffffff81576df0>] vfs_write+0x170/0x4e0 fs/read_write.c:560
 [<ffffffff8157a724>] SYSC_write fs/read_write.c:607 [inline]
 [<ffffffff8157a724>] SyS_write+0xd4/0x1a0 fs/read_write.c:599
 [<ffffffff839658c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Object at ffff8801cc7e65a0, in cache kmalloc-8 size: 8
Allocated:
PID = 3416
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598
 __kmalloc+0x128/0x320 mm/slub.c:3741
 kmalloc include/linux/slab.h:495 [inline]
 kzalloc include/linux/slab.h:636 [inline]
 keychord_write+0x6d/0x7d0 drivers/input/misc/keychord.c:241
 __vfs_write+0xfb/0x660 fs/read_write.c:510
 vfs_write+0x170/0x4e0 fs/read_write.c:560
 SYSC_write fs/read_write.c:607 [inline]
 SyS_write+0xd4/0x1a0 fs/read_write.c:599
 entry_SYSCALL_64_fastpath+0x23/0xc6
Freed:
PID = 3433
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571
 slab_free_hook mm/slub.c:1355 [inline]
 slab_free_freelist_hook mm/slub.c:1377 [inline]
 slab_free mm/slub.c:2958 [inline]
 kfree+0xf0/0x2f0 mm/slub.c:3878
 keychord_write+0x150/0x7d0 drivers/input/misc/keychord.c:259
 __vfs_write+0xfb/0x660 fs/read_write.c:510
 vfs_write+0x170/0x4e0 fs/read_write.c:560
 SYSC_write fs/read_write.c:607 [inline]
 SyS_write+0xd4/0x1a0 fs/read_write.c:599
 entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
==================================================================
BUG: Double free or freeing an invalid pointer
Unexpected shadow byte: 0xFB
CPU: 1 PID: 3414 Comm: syz-executor1 Tainted: G    B           4.9.39-g5b07c2d #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c9b1fb70 ffffffff81eacd59 ffff8801dac01c80 ffff8801cc7e6600
 ffff8801cc7e6608 ffffffff82b495cc 0000000000000282 ffff8801c9b1fb98
 ffffffff81546bfc 00000000fffffffb ffff8801dac01c80 ffff8801cc7e6600
Call Trace:
 [<ffffffff81eacd59>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eacd59>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81546bfc>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160
 [<ffffffff81547404>] kasan_report_double_free+0x44/0x60 mm/kasan/report.c:181
 [<ffffffff815467ed>] kasan_slab_free+0x9d/0xc0 mm/kasan/kasan.c:562
 [<ffffffff815427f0>] slab_free_hook mm/slub.c:1355 [inline]
 [<ffffffff815427f0>] slab_free_freelist_hook mm/slub.c:1377 [inline]
 [<ffffffff815427f0>] slab_free mm/slub.c:2958 [inline]
 [<ffffffff815427f0>] kfree+0xf0/0x2f0 mm/slub.c:3878
 [<ffffffff82b495cc>] keychord_write+0x5fc/0x7d0 drivers/input/misc/keychord.c:303
 [<ffffffff81572d6b>] __vfs_write+0xfb/0x660 fs/read_write.c:510
 [<ffffffff81576df0>] vfs_write+0x170/0x4e0 fs/read_write.c:560
 [<ffffffff8157a724>] SYSC_write fs/read_write.c:607 [inline]
 [<ffffffff8157a724>] SyS_write+0xd4/0x1a0 fs/read_write.c:599
 [<ffffffff839658c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
Object at ffff8801cc7e6600, in cache kmalloc-8 size: 8
Allocated:
PID = 3414
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:598
 __kmalloc+0x128/0x320 mm/slub.c:3741
 kmalloc include/linux/slab.h:495 [inline]
 kzalloc include/linux/slab.h:636 [inline]
 keychord_write+0x6d/0x7d0 drivers/input/misc/keychord.c:241
 __vfs_write+0xfb/0x660 fs/read_write.c:510
 vfs_write+0x170/0x4e0 fs/read_write.c:560
 SYSC_write fs/read_write.c:607 [inline]
 SyS_write+0xd4/0x1a0 fs/read_write.c:599
 entry_SYSCALL_64_fastpath+0x23/0xc6
Freed:
PID = 3425
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57
 save_stack+0x43/0xd0 mm/kasan/kasan.c:495
 set_track mm/kasan/kasan.c:507 [inline]
 kasan_slab_free+0x73/0xc0 mm/kasan/kasan.c:571
 slab_free_hook mm/slub.c:1355 [inline]
 slab_free_freelist_hook mm/slub.c:1377 [inline]
 slab_free mm/slub.c:2958 [inline]
 kfree+0xf0/0x2f0 mm/slub.c:3878
 keychord_write+0x150/0x7d0 drivers/input/misc/keychord.c:259
 __vfs_write+0xfb/0x660 fs/read_write.c:510
 vfs_write+0x170/0x4e0 fs/read_write.c:560
 SYSC_write fs/read_write.c:607 [inline]
 SyS_write+0xd4/0x1a0 fs/read_write.c:599
 entry_SYSCALL_64_fastpath+0x23/0xc6
==================================================================
==================================================================
BUG: Double free or freeing an invalid pointer
Unexpected shadow byte: 0xFB
CPU: 0 PID: 3415 Comm: syz-executor5 Tainted: G    B           4.9.39-g5b07c2d #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c9b3fb70 ffffffff81eacd59 ffff8801dac01c80 ffff8801cc7e65d0
 ffff8801cc7e65d8 ffffffff82b495cc 0000000000000282 ffff8801c9b3fb98
 ffffffff81546bfc 00000000fffffffb ffff8801dac01c80 ffff8801cc7e65d0
Call Trace:
 [<ffffffff81eacd59>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eacd59>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81546bfc>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:160
 [<ffffffff81547404>] kasan_report_double_free+0x44/0x60 mm/kasan/report.c:181
 [<ffffffff815467ed>] kasan_slab_free+0x9d/0xc0 mm/kasan/kasan.c:562
 [<ffffffff815427f0>] slab_free_hook mm/slub.c:1355 [inline]
 [<ffffffff815427f0>] slab_free_freelist_hook mm/slub.c:1377 [inline]
 [<ffffffff815427f0>] slab_free mm/slub.c:2958 [inline]
 [<ffffffff815427f0>] kfree+0xf0/0x2f0 mm/slub.c:3878
 [<ffffffff82b495cc>] keychord_write+0x5fc/0x7d0 drivers/input/misc/keychord.c:303
 [<ffffffff81572d6b>] __vfs_write+0xfb/0x660 fs/read_write.c:510