syzbot


KASAN: use-after-free Read in ds_probe

Status: closed as dup on 2019/08/13 12:54
Subsystems: usb
[Documentation on labels]
Reported-by: syzbot+5620801aaaf778ca83c6@syzkaller.appspotmail.com
First crash: 1890d, last: 1846d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
KASAN: slab-out-of-bounds Read in ds_probe usb C 5 1848d 1886d
Discussions (4)
Title Replies (including bot) Last reply
KASAN: use-after-free Read in ds_probe 1 (2) 2019/08/13 12:54
Reminder: 67 open syzbot bugs in usb subsystem 1 (1) 2019/07/24 01:35
Reminder: 47 open syzbot bugs in usb subsystem 1 (1) 2019/07/09 19:01
Reminder: 42 open syzbot bugs in usb subsystem 1 (1) 2019/06/25 03:44

Sample crash report:
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=04fa, idProduct=2490, bcdDevice=74.f9
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
==================================================================
BUG: KASAN: use-after-free in ds_probe+0x604/0x760 drivers/w1/masters/ds2490.c:1019
Read of size 1 at addr ffff888094825e62 by task kworker/0:1/12

CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.1.0-rc5-319617-gd34f951 #4
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.cold+0x1a/0x3c mm/kasan/report.c:317
 ds_probe+0x604/0x760 drivers/w1/masters/ds2490.c:1019
 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+0x1398/0x3b00 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 3803:
 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:552 [inline]
 kzalloc include/linux/slab.h:742 [inline]
 lsm_task_alloc security/security.c:544 [inline]
 security_task_alloc+0x113/0x180 security/security.c:1456
 copy_process.part.0+0x1c62/0x76b0 kernel/fork.c:1898
 copy_process kernel/fork.c:1709 [inline]
 _do_fork+0x234/0xed0 kernel/fork.c:2226
 do_syscall_64+0xcf/0x4f0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 3787:
 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/0x280 mm/slub.c:3958
 security_task_free+0x9a/0xf0 security/security.c:1470
 __put_task_struct+0xec/0x4d0 kernel/fork.c:724
 put_task_struct include/linux/sched/task.h:98 [inline]
 delayed_put_task_struct+0x189/0x290 kernel/exit.c:181
 __rcu_reclaim kernel/rcu/rcu.h:227 [inline]
 rcu_do_batch kernel/rcu/tree.c:2475 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2788 [inline]
 rcu_core+0x843/0x1a90 kernel/rcu/tree.c:2769
 __do_softirq+0x22a/0x8cd kernel/softirq.c:293

The buggy address belongs to the object at ffff888094825e40
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 34 bytes inside of
 64-byte region [ffff888094825e40, ffff888094825e80)
The buggy address belongs to the page:
page:ffffea0002520940 count:1 mapcount:0 mapping:ffff88812c3f5600 index:0xffff888094825720
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea0002688600 0000000c0000000c ffff88812c3f5600
raw: ffff888094825720 00000000802a0029 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888094825d00: fc fc fc fc fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888094825d80: fb fb fb fb fb fb fb fb fc fc fc fc 00 00 00 00
>ffff888094825e00: 00 00 fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                                       ^
 ffff888094825e80: fc fc fc fc fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888094825f00: 00 00 00 00 00 fc fc fc fc fc fc fc fb fb fb fb
==================================================================

Crashes (80):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/04/19 07:40 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/19 07:01 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/18 10:56 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/18 10:34 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/18 10:12 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/18 09:48 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/18 02:18 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/18 01:31 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 20:19 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 18:21 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 17:41 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 06:57 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 06:30 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 06:03 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 05:33 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 04:39 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 03:51 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 01:42 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb b0e8efcb .config console log report syz C ci2-upstream-usb
2019/04/17 00:40 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/17 00:13 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 23:46 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 16:57 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 16:13 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 14:51 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 13:50 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 09:22 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 08:55 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/16 06:07 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/15 17:13 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/15 16:47 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/15 07:20 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/15 05:09 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/15 04:46 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz C ci2-upstream-usb
2019/04/13 04:32 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb c402d8f1 .config console log report syz C ci2-upstream-usb
2019/04/16 22:20 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report syz ci2-upstream-usb
2019/05/26 22:44 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config console log report ci2-upstream-usb
2019/05/26 06:11 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 85c57315 .config console log report ci2-upstream-usb
2019/05/22 15:57 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config console log report ci2-upstream-usb
2019/05/22 10:04 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 84b9d384 .config console log report ci2-upstream-usb
2019/05/21 15:06 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config console log report ci2-upstream-usb
2019/05/21 13:45 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config console log report ci2-upstream-usb
2019/05/21 12:39 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config console log report ci2-upstream-usb
2019/05/21 11:11 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config console log report ci2-upstream-usb
2019/05/21 10:11 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config console log report ci2-upstream-usb
2019/05/21 08:46 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 8285069f .config console log report ci2-upstream-usb
2019/05/18 19:30 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 5a4461b0 .config console log report ci2-upstream-usb
2019/05/17 12:28 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 2755003a .config console log report ci2-upstream-usb
2019/05/17 07:55 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 2755003a .config console log report ci2-upstream-usb
2019/05/14 00:25 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 7c305b44 .config console log report ci2-upstream-usb
2019/05/13 20:38 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 7c305b44 .config console log report ci2-upstream-usb
2019/05/12 00:17 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 0637a7f0 .config console log report ci2-upstream-usb
2019/05/09 19:48 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 214bf476 .config console log report ci2-upstream-usb
2019/05/09 04:12 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 1ab4c999 .config console log report ci2-upstream-usb
2019/05/08 22:47 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 1bb034d0 .config console log report ci2-upstream-usb
2019/05/07 00:20 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce 148296f4 .config console log report ci2-upstream-usb
2019/05/04 22:48 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce d28f4ce5 .config console log report ci2-upstream-usb
2019/05/03 05:13 https://github.com/google/kasan.git usb-fuzzer 43151d6c3fce e9039493 .config console log report ci2-upstream-usb
2019/04/24 05:12 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa 2398edea .config console log report ci2-upstream-usb
2019/04/19 13:53 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report ci2-upstream-usb
2019/04/19 04:11 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report ci2-upstream-usb
2019/04/18 02:59 https://github.com/google/kasan.git usb-fuzzer d34f9519daaa b0e8efcb .config console log report ci2-upstream-usb
2019/04/16 18:34 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report ci2-upstream-usb
2019/04/16 10:33 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report ci2-upstream-usb
2019/04/15 19:19 https://github.com/google/kasan.git usb-fuzzer 9a33b36996cb 505ab413 .config console log report ci2-upstream-usb
* Struck through repros no longer work on HEAD.