syzbot


KASAN: slab-out-of-bounds Read in parse_term_proc_unit

Status: closed as dup on 2019/10/23 05:07
Subsystems: usb sound
[Documentation on labels]
Reported-by: syzbot+f586a582f79122007598@syzkaller.appspotmail.com
First crash: 1593d, last: 1588d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
KASAN: slab-out-of-bounds Read in build_audio_procunit usb sound C 6 1584d 1593d
Discussions (1)
Title Replies (including bot) Last reply
KASAN: slab-out-of-bounds Read in parse_term_proc_unit 1 (2) 2019/10/23 05:07

Sample crash report:
usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
==================================================================
BUG: KASAN: slab-out-of-bounds in uac_processing_unit_iProcessing include/uapi/linux/usb/audio.h:429 [inline]
BUG: KASAN: slab-out-of-bounds in parse_term_proc_unit+0x57a/0x5e0 sound/usb/mixer.c:896
Read of size 1 at addr ffff8881d52c9abc by task kworker/1:2/83

CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.4.0-rc3+ #0
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+0xca/0x13e lib/dump_stack.c:113
 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
 uac_processing_unit_iProcessing include/uapi/linux/usb/audio.h:429 [inline]
 parse_term_proc_unit+0x57a/0x5e0 sound/usb/mixer.c:896
 __check_input_term+0xc32/0x13f0 sound/usb/mixer.c:984
 parse_audio_feature_unit sound/usb/mixer.c:1875 [inline]
 parse_audio_unit+0x101d/0x36f0 sound/usb/mixer.c:2753
 snd_usb_mixer_controls+0x715/0xb90 sound/usb/mixer.c:3095
 snd_usb_create_mixer+0x2b5/0x1890 sound/usb/mixer.c:3445
 usb_audio_probe+0xc76/0x2010 sound/usb/card.c:653
 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+0xae6/0x16f0 drivers/base/core.c:2201
 usb_set_configuration+0xdf6/0x1670 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+0xae6/0x16f0 drivers/base/core.c:2201
 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536
 hub_port_connect drivers/usb/core/hub.c:5183 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5323 [inline]
 port_event drivers/usb/core/hub.c:5469 [inline]
 hub_event+0x1dd0/0x37e0 drivers/usb/core/hub.c:5551
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 83:
 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:561 [inline]
 usb_get_configuration+0x314/0x3050 drivers/usb/core/config.c:857
 usb_enumerate_device drivers/usb/core/hub.c:2369 [inline]
 usb_new_device+0xd3/0x160 drivers/usb/core/hub.c:2505
 hub_port_connect drivers/usb/core/hub.c:5183 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5323 [inline]
 port_event drivers/usb/core/hub.c:5469 [inline]
 hub_event+0x1dd0/0x37e0 drivers/usb/core/hub.c:5551
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 102:
 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:1475 [inline]
 slab_free mm/slub.c:3018 [inline]
 kfree+0xe4/0x320 mm/slub.c:3967
 urb_destroy drivers/usb/core/urb.c:26 [inline]
 kref_put include/linux/kref.h:65 [inline]
 usb_free_urb.part.0+0x7a/0xc0 drivers/usb/core/urb.c:95
 usb_free_urb+0x1b/0x30 drivers/usb/core/urb.c:94
 usb_start_wait_urb+0x1e5/0x2b0 drivers/usb/core/message.c:79
 usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
 usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
 set_port_feature+0x69/0x90 drivers/usb/core/hub.c:428
 hub_suspend+0x769/0x910 drivers/usb/core/hub.c:3710
 usb_suspend_interface drivers/usb/core/driver.c:1203 [inline]
 usb_suspend_both+0x260/0x7b0 drivers/usb/core/driver.c:1308
 usb_runtime_suspend+0x46/0x120 drivers/usb/core/driver.c:1846
 __rpm_callback+0x27e/0x3c0 drivers/base/power/runtime.c:357
 rpm_callback+0x18f/0x230 drivers/base/power/runtime.c:487
 rpm_suspend+0x37a/0x1300 drivers/base/power/runtime.c:629
 __pm_runtime_suspend+0xbb/0x150 drivers/base/power/runtime.c:1048
 pm_runtime_autosuspend include/linux/pm_runtime.h:196 [inline]
 usb_runtime_idle+0x44/0x60 drivers/usb/core/driver.c:1883
 __rpm_callback+0x27e/0x3c0 drivers/base/power/runtime.c:357
 rpm_idle+0x200/0x8f0 drivers/base/power/runtime.c:449
 pm_runtime_work+0x13e/0x180 drivers/base/power/runtime.c:907
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 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 ffff8881d52c9a00
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 188 bytes inside of
 192-byte region [ffff8881d52c9a00, ffff8881d52c9ac0)
The buggy address belongs to the page:
page:ffffea000754b240 refcount:1 mapcount:0 mapping:ffff8881da002a00 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 0000000000000000 0000000100000001 ffff8881da002a00
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d52c9980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881d52c9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881d52c9a80: 00 00 00 00 03 fc fc fc fc fc fc fc fc fc fc fc
                                        ^
 ffff8881d52c9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881d52c9b80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/10/28 04:04 https://github.com/google/kasan.git usb-fuzzer 22be26f76193 25bb509e .config console log report syz C ci2-upstream-usb
2019/10/23 18:53 https://github.com/google/kasan.git usb-fuzzer 22be26f76193 b602d64b .config console log report syz C ci2-upstream-usb
2019/10/22 17:39 https://github.com/google/kasan.git usb-fuzzer 22be26f76193 4ee855e7 .config console log report syz C ci2-upstream-usb
* Struck through repros no longer work on HEAD.