syzbot


KASAN: invalid-free in disconnect_rio
Status: fixed on 2019/06/20 05:27
Reported-by: syzbot+35f04d136fc975a70da4@syzkaller.appspotmail.com
Fix commit: 3864d33943b4 USB: rio500: refuse more than one device at a time
First crash: 1139d, last: 1093d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: invalid-free in disconnect_rio (2) C 51 957d 978d 14/22 fixed on 2019/10/27 22:28

Sample crash report:
rio500 6-1:0.110: USB Rio found at address 2
usb 3-1: USB disconnect, device number 2
usb 2-1: USB disconnect, device number 2
rio500 2-1:0.110: USB Rio disconnected.
==================================================================
BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3003 [inline]
BUG: KASAN: double-free or invalid-free in kfree+0xce/0x290 mm/slub.c:3958

CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.1.0-rc4-319354-g9a33b36 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xe8/0x16e lib/dump_stack.c:113
 print_address_description+0x6c/0x236 mm/kasan/report.c:187
 kasan_report_invalid_free+0x66/0xa0 mm/kasan/report.c:278
usb 1-1: USB disconnect, device number 2
 __kasan_slab_free+0x162/0x180 mm/kasan/common.c:438
 slab_free_hook mm/slub.c:1429 [inline]
 slab_free_freelist_hook+0x5e/0x140 mm/slub.c:1456
usb 5-1: USB disconnect, device number 2
usb 6-1: USB disconnect, device number 2
 slab_free mm/slub.c:3003 [inline]
 kfree+0xce/0x290 mm/slub.c:3958
 disconnect_rio+0x13b/0x200 drivers/usb/misc/rio500.c:506
 usb_unbind_interface+0x1c9/0x980 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:1082 [inline]
 device_release_driver_internal+0x436/0x4f0 drivers/base/dd.c:1113
 bus_remove_device+0x302/0x5c0 drivers/base/bus.c:556
 device_del+0x467/0xb90 drivers/base/core.c:2269
 usb_disable_device+0x242/0x790 drivers/usb/core/message.c:1235
 usb_disconnect+0x298/0x870 drivers/usb/core/hub.c:2197
 hub_port_connect drivers/usb/core/hub.c:4940 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0xcd2/0x3b00 drivers/usb/core/hub.c:5432
 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269
 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415
 kthread+0x313/0x420 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Allocated by task 584:
 set_track mm/kasan/common.c:87 [inline]
 __kasan_kmalloc mm/kasan/common.c:497 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:470
 kmalloc include/linux/slab.h:547 [inline]
 probe_rio+0x188/0x268 drivers/usb/misc/rio500.c:471
 usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361
 really_probe+0x2da/0xb10 drivers/base/dd.c:509
 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671
 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778
 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454
 __device_attach+0x223/0x3a0 drivers/base/dd.c:844
 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514
 device_add+0xad2/0x16e0 drivers/base/core.c:2106
 usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2021
 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210
 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266
 really_probe+0x2da/0xb10 drivers/base/dd.c:509
 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671
 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778
 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454
 __device_attach+0x223/0x3a0 drivers/base/dd.c:844
 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514
 device_add+0xad2/0x16e0 drivers/base/core.c:2106
 usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534
 hub_port_connect drivers/usb/core/hub.c:5089 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432
 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269
 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415
 kthread+0x313/0x420 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Freed by task 584:
 set_track mm/kasan/common.c:87 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:459
 slab_free_hook mm/slub.c:1429 [inline]
 slab_free_freelist_hook+0x5e/0x140 mm/slub.c:1456
 slab_free mm/slub.c:3003 [inline]
 kfree+0xce/0x290 mm/slub.c:3958
 disconnect_rio+0x13b/0x200 drivers/usb/misc/rio500.c:506
 usb_unbind_interface+0x1c9/0x980 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:1082 [inline]
 device_release_driver_internal+0x436/0x4f0 drivers/base/dd.c:1113
 bus_remove_device+0x302/0x5c0 drivers/base/bus.c:556
 device_del+0x467/0xb90 drivers/base/core.c:2269
 usb_disable_device+0x242/0x790 drivers/usb/core/message.c:1235
 usb_disconnect+0x298/0x870 drivers/usb/core/hub.c:2197
 hub_port_connect drivers/usb/core/hub.c:4940 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0xcd2/0x3b00 drivers/usb/core/hub.c:5432
 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269
 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415
 kthread+0x313/0x420 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff88808fe8e600
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
 4096-byte region [ffff88808fe8e600, ffff88808fe8f600)
The buggy address belongs to the page:
page:ffffea00023fa200 count:1 mapcount:0 mapping:ffff88812c3f4600 index:0x0 compound_mapcount: 0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 dead000000000100 dead000000000200 ffff88812c3f4600
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808fe8e500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88808fe8e580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808fe8e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88808fe8e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808fe8e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (180):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-usb 2019/04/14 11:44 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config log report syz C
ci2-upstream-usb 2019/04/11 19:45 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 13030ef8 .config log report syz C
ci2-upstream-usb 2019/05/27 12:42 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 562efd79 .config log report
ci2-upstream-usb 2019/05/27 09:01 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 562efd79 .config log report
ci2-upstream-usb 2019/05/27 05:40 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/26 12:29 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/26 11:08 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/26 09:42 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/26 05:53 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/25 14:49 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/25 10:43 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/25 09:25 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/25 06:18 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/25 04:44 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/24 20:51 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config log report
ci2-upstream-usb 2019/05/24 14:54 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/24 14:37 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/24 10:45 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/24 09:23 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/24 06:08 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/23 21:13 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/23 19:16 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/23 18:12 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/23 16:50 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/23 12:49 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/23 06:59 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0dadcd9d .config log report
ci2-upstream-usb 2019/05/23 02:59 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config log report
ci2-upstream-usb 2019/05/22 22:10 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config log report
ci2-upstream-usb 2019/05/22 20:43 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config log report
ci2-upstream-usb 2019/05/22 13:25 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config log report
ci2-upstream-usb 2019/05/22 10:44 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config log report
ci2-upstream-usb 2019/05/22 05:28 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config log report
ci2-upstream-usb 2019/05/22 04:27 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config log report
ci2-upstream-usb 2019/05/22 00:26 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 13427bd9 .config log report
ci2-upstream-usb 2019/05/21 22:59 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 13427bd9 .config log report
ci2-upstream-usb 2019/05/21 21:05 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 13427bd9 .config log report
ci2-upstream-usb 2019/05/21 19:34 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 13427bd9 .config log report
ci2-upstream-usb 2019/05/21 16:24 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 13427bd9 .config log report
ci2-upstream-usb 2019/05/21 14:21 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config log report
ci2-upstream-usb 2019/05/21 12:53 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config log report
ci2-upstream-usb 2019/05/21 11:39 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config log report
ci2-upstream-usb 2019/05/21 05:01 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config log report
ci2-upstream-usb 2019/05/21 04:14 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config log report
ci2-upstream-usb 2019/05/21 01:15 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce b5641f32 .config log report
ci2-upstream-usb 2019/05/20 20:55 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce b5641f32 .config log report
ci2-upstream-usb 2019/05/20 16:16 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce b5641f32 .config log report
ci2-upstream-usb 2019/05/18 10:29 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 5a4461b0 .config log report
ci2-upstream-usb 2019/05/18 06:55 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 5a4461b0 .config log report
ci2-upstream-usb 2019/05/18 02:25 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 40046286 .config log report
ci2-upstream-usb 2019/04/11 18:26 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 13030ef8 .config log report