syzbot


KASAN: use-after-free Read in xpad_play_effect
Status: upstream: reported syz repro on 2019/09/23 14:31
Reported-by: syzbot+bea56e0be9fb9106bcf3@syzkaller.appspotmail.com
First crash: 978d, last: 793d

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x31af/0x3b60 kernel/locking/lockdep.c:3828
Read of size 8 at addr ffff8881c1609910 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xef/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0+0x36/0x50 mm/kasan/report.c:374
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:634
 __lock_acquire+0x31af/0x3b60 kernel/locking/lockdep.c:3828
 lock_acquire+0x127/0x320 kernel/locking/lockdep.c:4485
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x32/0x50 kernel/locking/spinlock.c:159
 xpad_play_effect+0xfe/0xc50 drivers/input/joystick/xpad.c:1225
 ml_play_effects+0x817/0x1270 drivers/input/ff-memless.c:398
 ml_effect_timer+0x4e/0x70 drivers/input/ff-memless.c:412
 call_timer_fn+0x179/0x650 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x5e3/0x1490 kernel/time/timer.c:1786
 __do_softirq+0x221/0x912 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x178/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:default_idle+0x28/0x2e0 arch/x86/kernel/process.c:700
Code: cc cc 41 56 41 55 65 44 8b 2d 6c ab 8b 7a 41 54 55 53 0f 1f 44 00 00 e8 46 a8 cd fb e9 07 00 00 00 0f 00 2d ba 30 4c 00 fb f4 <65> 44 8b 2d 48 ab 8b 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffff8881da22fdc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: ffff8881da213100 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da21394c
RBP: ffffed103b442620 R08: ffff8881da213100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x3c3/0x4e0 kernel/sched/idle.c:269
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361
 start_secondary+0x27d/0x330 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242

Allocated by task 101:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:510 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:483
 kmalloc include/linux/slab.h:556 [inline]
 kzalloc include/linux/slab.h:690 [inline]
 xpad_probe+0x24b/0x1b20 drivers/input/joystick/xpad.c:1717
 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x104/0x210 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0x1480/0x1c20 drivers/base/core.c:2487
 usb_set_configuration+0xe67/0x1740 drivers/usb/core/message.c:2023
 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x104/0x210 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0x1480/0x1c20 drivers/base/core.c:2487
 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2537
 hub_port_connect drivers/usb/core/hub.c:5184 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5324 [inline]
 port_event drivers/usb/core/hub.c:5470 [inline]
 hub_event+0x1e59/0x3860 drivers/usb/core/hub.c:5552
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2264
 worker_thread+0x96/0xe20 kernel/workqueue.c:2410
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 101:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:471
 slab_free_hook mm/slub.c:1424 [inline]
 slab_free_freelist_hook mm/slub.c:1457 [inline]
 slab_free mm/slub.c:3004 [inline]
 kfree+0xdc/0x310 mm/slub.c:3956
 xpad_disconnect+0x1cb/0x4a3 drivers/input/joystick/xpad.c:1865
 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:1134 [inline]
 device_release_driver_internal+0x42f/0x500 drivers/base/dd.c:1165
 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:532
 device_del+0x481/0xd30 drivers/base/core.c:2664
 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237
 usb_disconnect+0x284/0x8d0 drivers/usb/core/hub.c:2200
 hub_port_connect drivers/usb/core/hub.c:5035 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5324 [inline]
 port_event drivers/usb/core/hub.c:5470 [inline]
 hub_event+0x1753/0x3860 drivers/usb/core/hub.c:5552
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2264
 worker_thread+0x96/0xe20 kernel/workqueue.c:2410
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff8881c1609800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
 1024-byte region [ffff8881c1609800, ffff8881c1609c00)
The buggy address belongs to the page:
page:ffffea0007058200 refcount:1 mapcount:0 mapping:ffff8881da002280 index:0x0 compound_mapcount: 0
raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da002280
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c1609800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c1609880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881c1609900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8881c1609980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c1609a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (77):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-usb 2019/12/02 11:43 https://github.com/google/kasan.git usb-fuzzer 32b5e2b28188 f879db37 .config log report syz
ci2-upstream-usb 2020/03/24 03:44 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 84f999d6 .config log report
ci2-upstream-usb 2020/03/24 00:45 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 84f999d6 .config log report
ci2-upstream-usb 2020/03/23 21:02 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 84f999d6 .config log report
ci2-upstream-usb 2020/03/23 14:57 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 78267cec .config log report
ci2-upstream-usb 2020/03/23 05:47 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 78267cec .config log report
ci2-upstream-usb 2020/03/23 03:12 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 78267cec .config log report
ci2-upstream-usb 2020/03/22 23:51 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 78267cec .config log report
ci2-upstream-usb 2020/03/22 10:26 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 78267cec .config log report
ci2-upstream-usb 2020/03/20 17:14 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 2c31c529 .config log report
ci2-upstream-usb 2020/03/20 04:20 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 2c31c529 .config log report
ci2-upstream-usb 2020/03/20 01:40 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 2c31c529 .config log report
ci2-upstream-usb 2020/03/20 00:22 https://github.com/google/kasan.git usb-fuzzer e17994d1e7b1 2c31c529 .config log report
ci2-upstream-usb 2020/03/18 11:17 https://github.com/google/kasan.git usb-fuzzer d6ff8147a51c 0a96a13c .config log report
ci2-upstream-usb 2020/03/10 14:47 https://github.com/google/kasan.git usb-fuzzer d6ff8147a51c 35f53e45 .config log report
ci2-upstream-usb 2020/03/08 19:05 https://github.com/google/kasan.git usb-fuzzer d6ff8147a51c 2e9971bb .config log report
ci2-upstream-usb 2020/03/08 09:36 https://github.com/google/kasan.git usb-fuzzer d6ff8147a51c 2e9971bb .config log report
ci2-upstream-usb 2020/03/08 02:39 https://github.com/google/kasan.git usb-fuzzer d6ff8147a51c 2e9971bb .config log report
ci2-upstream-usb 2020/02/20 00:19 https://github.com/google/kasan.git usb-fuzzer 7f0cd6c7c423 47fae6e9 .config log report
ci2-upstream-usb 2020/02/19 22:31 https://github.com/google/kasan.git usb-fuzzer 7f0cd6c7c423 47fae6e9 .config log report
ci2-upstream-usb 2020/02/18 08:51 https://github.com/google/kasan.git usb-fuzzer 7f0cd6c7c423 1ce142dc .config log report
ci2-upstream-usb 2020/02/10 20:16 https://github.com/google/kasan.git usb-fuzzer e5cd56e94edd d9e55b05 .config log report
ci2-upstream-usb 2020/02/06 16:58 https://github.com/google/kasan.git usb-fuzzer e5cd56e94edd 5be3a391 .config log report
ci2-upstream-usb 2020/02/06 11:35 https://github.com/google/kasan.git usb-fuzzer e5cd56e94edd 662cf49a .config log report
ci2-upstream-usb 2020/02/06 09:50 https://github.com/google/kasan.git usb-fuzzer e5cd56e94edd 662cf49a .config log report
ci2-upstream-usb 2020/02/05 09:48 https://github.com/google/kasan.git usb-fuzzer e5cd56e94edd 93e5e335 .config log report
ci2-upstream-usb 2020/02/03 18:17 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 93e5e335 .config log report
ci2-upstream-usb 2020/02/03 06:55 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 93e5e335 .config log report
ci2-upstream-usb 2020/01/31 05:44 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 5ed23f9a .config log report
ci2-upstream-usb 2020/01/30 08:14 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 5ed23f9a .config log report
ci2-upstream-usb 2020/01/29 23:11 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 5ed23f9a .config log report
ci2-upstream-usb 2020/01/29 11:21 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 c8e81ce4 .config log report
ci2-upstream-usb 2020/01/28 23:05 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 c8e81ce4 .config log report
ci2-upstream-usb 2020/01/28 19:17 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 c8e81ce4 .config log report
ci2-upstream-usb 2020/01/28 02:37 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 56cd6c9b .config log report
ci2-upstream-usb 2020/01/27 17:40 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 56cd6c9b .config log report
ci2-upstream-usb 2020/01/25 23:53 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 f4e7270e .config log report
ci2-upstream-usb 2020/01/23 22:57 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 11ebf937 .config log report
ci2-upstream-usb 2020/01/23 17:57 https://github.com/google/kasan.git usb-fuzzer cd234325a5f1 11ebf937 .config log report
ci2-upstream-usb 2020/01/23 14:05 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 3334d684 .config log report
ci2-upstream-usb 2020/01/19 20:05 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 0342f8c7 .config log report
ci2-upstream-usb 2020/01/19 03:27 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 bc8bc756 .config log report
ci2-upstream-usb 2020/01/18 04:10 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 3de7aabb .config log report
ci2-upstream-usb 2020/01/18 02:21 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 3de7aabb .config log report
ci2-upstream-usb 2020/01/17 14:33 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 3de7aabb .config log report
ci2-upstream-usb 2020/01/17 08:39 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 3de7aabb .config log report
ci2-upstream-usb 2020/01/16 20:15 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 3de7aabb .config log report
ci2-upstream-usb 2020/01/16 15:44 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 3de7aabb .config log report
ci2-upstream-usb 2020/01/15 18:55 https://github.com/google/kasan.git usb-fuzzer 4cc301ee04d9 f9b69507 .config log report
ci2-upstream-usb 2020/01/10 21:56 https://github.com/google/kasan.git usb-fuzzer ae1794106b94 532ec44e .config log report
ci2-upstream-usb 2020/01/08 02:31 https://github.com/google/kasan.git usb-fuzzer ae1794106b94 6738e0b3 .config log report
ci2-upstream-usb 2019/12/26 22:32 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/26 10:57 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/26 10:18 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/26 01:44 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/25 15:30 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/25 02:38 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/24 00:50 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/23 15:28 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/23 14:15 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 be5c2c81 .config log report
ci2-upstream-usb 2019/12/23 09:08 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 8b967267 .config log report
ci2-upstream-usb 2019/12/20 01:31 https://github.com/google/kasan.git usb-fuzzer ecdf2214f472 36650b4b .config log report
ci2-upstream-usb 2019/12/18 14:02 https://github.com/google/kasan.git usb-fuzzer d533c9925862 64ca0a37 .config log report
ci2-upstream-usb 2019/12/05 13:38 https://github.com/google/kasan.git usb-fuzzer 1f22d15c209f 9fd5a512 .config log report
ci2-upstream-usb 2019/12/02 10:47 https://github.com/google/kasan.git usb-fuzzer 32b5e2b28188 f879db37 .config log report
ci2-upstream-usb 2019/11/21 05:52 https://github.com/google/kasan.git usb-fuzzer da06441bb485 8098ea0f .config log report
ci2-upstream-usb 2019/11/03 05:43 https://github.com/google/kasan.git usb-fuzzer ff6409a6ec35 d603afc9 .config log report
ci2-upstream-usb 2019/10/30 23:01 https://github.com/google/kasan.git usb-fuzzer ff6409a6ec35 a41ca8fa .config log report
ci2-upstream-usb 2019/10/29 06:18 https://github.com/google/kasan.git usb-fuzzer ff6409a6ec35 5ea87a66 .config log report
ci2-upstream-usb 2019/10/26 08:07 https://github.com/google/kasan.git usb-fuzzer 22be26f76193 413926c5 .config log report
ci2-upstream-usb 2019/10/16 03:50 https://github.com/google/kasan.git usb-fuzzer 22be26f76193 d4ea592f .config log report
ci2-upstream-usb 2019/10/12 12:28 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 426631dd .config log report
ci2-upstream-usb 2019/10/08 12:29 https://github.com/google/kasan.git usb-fuzzer 58d5f26a5584 64612bfd .config log report
ci2-upstream-usb 2019/09/28 19:37 https://github.com/google/kasan.git usb-fuzzer 2994c07743fe eb6b9855 .config log report
ci2-upstream-usb 2019/09/25 00:33 https://github.com/google/kasan.git usb-fuzzer d9e63adcd16e e38a6630 .config log report
ci2-upstream-usb 2019/09/21 13:24 https://github.com/google/kasan.git usb-fuzzer e0bd8d794fc9 d96e88f3 .config log report