syzbot

 sign-in | mailing list | source | docs
🐞 Open [1254] ≡ Subsystems 🐞 Fixed [5369] 🐞 Invalid [12790] ⬇ Missing Backports [104] 📈 Kernel Health 📈 Bugs/Month 📈 Bug Lifetimes 📈 Fuzzing 📈 Crashes 💬 Send us feedback

KASAN: use-after-free Read in usb_kill_urb

Status: closed as dup on 2019/08/12 12:04
Subsystems: usb
[Documentation on labels]
Reported-by: syzbot+22ae4e3b9fcc8a5c153a@syzkaller.appspotmail.com
First crash: 1770d, last: 1746d
▶ ▼ Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
KASAN: use-after-free Read in ld_usb_release usb C 14 1761d 1770d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
KASAN: use-after-free Read in usb_kill_urb 5 (7) 2019/08/12 12:03
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2019/08/09 19:26 18m stern@rowland.harvard.edu patch https://github.com/google/kasan.git e96407b4 OK

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
BUG: KASAN: use-after-free in usb_kill_urb drivers/usb/core/urb.c:695 [inline]
BUG: KASAN: use-after-free in usb_kill_urb+0x24b/0x2c0 drivers/usb/core/urb.c:687
Read of size 4 at addr ffff8881cbf9e610 by task syz-executor482/2837

CPU: 1 PID: 2837 Comm: syz-executor482 Not tainted 5.3.0-rc4+ #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 print_address_description+0x6a/0x32c mm/kasan/report.c:351
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482
 kasan_report+0xe/0x12 mm/kasan/common.c:612
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x128/0x190 mm/kasan/generic.c:192
 atomic_read include/asm-generic/atomic-instrumented.h:26 [inline]
 usb_kill_urb drivers/usb/core/urb.c:695 [inline]
 usb_kill_urb+0x24b/0x2c0 drivers/usb/core/urb.c:687
 iowarrior_release+0x1c9/0x280 drivers/usb/misc/iowarrior.c:663
 __fput+0x2d7/0x840 fs/file_table.c:280
 task_work_run+0x13f/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x8ef/0x2c00 kernel/exit.c:879
 do_group_exit+0x125/0x340 kernel/exit.c:983
 __do_sys_exit_group kernel/exit.c:994 [inline]
 __se_sys_exit_group kernel/exit.c:992 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:992
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440438
Code: 61 74 68 3e 5d 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 5b 2d 75 3c 6e 75 6d 62 65 72 3e 5d 0a 54 6f 20 72 75 6e 20 <72> 73 79 73 6c 6f 67 64 20 69 6e 20 6e 61 74 69 76 65 20 6d 6f 64
RSP: 002b:00007ffd48e65028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440438
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004c0390 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d2180 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 1822:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:487 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460
 kmalloc include/linux/slab.h:557 [inline]
 usb_alloc_urb+0x65/0xb0 drivers/usb/core/urb.c:73
 iowarrior_probe+0x4b2/0x10b2 drivers/usb/misc/iowarrior.c:797
 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x101/0x1b0 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:454
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
 device_add+0xae6/0x16f0 drivers/base/core.c:2165
 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+0x101/0x1b0 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:454
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
 device_add+0xae6/0x16f0 drivers/base/core.c:2165
 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536
 hub_port_connect drivers/usb/core/hub.c:5098 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
 port_event drivers/usb/core/hub.c:5359 [inline]
 hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441
 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 16:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:449
 slab_free_hook mm/slub.c:1423 [inline]
 slab_free_freelist_hook mm/slub.c:1474 [inline]
 slab_free mm/slub.c:3016 [inline]
 kfree+0xe4/0x2f0 mm/slub.c:3957
 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_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1722
 dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1965
 call_timer_fn+0x179/0x650 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers kernel/time/timer.c:1685 [inline]
 __run_timers kernel/time/timer.c:1653 [inline]
 run_timer_softirq+0x5cc/0x14b0 kernel/time/timer.c:1698
 __do_softirq+0x221/0x912 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881cbf9e600
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 16 bytes inside of
 192-byte region [ffff8881cbf9e600, ffff8881cbf9e6c0)
The buggy address belongs to the page:
page:ffffea00072fe780 refcount:1 mapcount:0 mapping:ffff8881da002a00 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 ffffea00072fbc80 0000000c00000002 ffff8881da002a00
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cbf9e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881cbf9e580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8881cbf9e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8881cbf9e680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881cbf9e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (83):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/18 23:41 https://github.com/google/kasan.git usb-fuzzer d0847550e22d b8ceabfc .config console log report syz C ci2-upstream-usb
2019/08/18 22:05 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report syz C ci2-upstream-usb
2019/08/18 19:16 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report syz C ci2-upstream-usb
2019/08/18 16:01 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report syz C ci2-upstream-usb
2019/08/18 13:46 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report syz C ci2-upstream-usb
2019/08/18 07:36 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report syz C ci2-upstream-usb
2019/08/17 23:47 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report syz C ci2-upstream-usb
2019/08/17 16:33 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report syz C ci2-upstream-usb
2019/08/17 08:55 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/17 06:31 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/17 05:32 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/17 02:29 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/17 01:51 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/16 19:39 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/16 17:32 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/16 16:28 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/16 16:18 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/16 15:27 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/16 14:51 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/16 10:46 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report syz C ci2-upstream-usb
2019/08/15 22:13 https://github.com/google/kasan.git usb-fuzzer d0847550e22d faeffb00 .config console log report syz C ci2-upstream-usb
2019/08/15 11:59 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 0d298d6b .config console log report syz C ci2-upstream-usb
2019/08/15 04:59 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 0d298d6b .config console log report syz C ci2-upstream-usb
2019/08/15 03:45 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 0d298d6b .config console log report syz C ci2-upstream-usb
2019/08/14 19:52 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 5576551b .config console log report syz C ci2-upstream-usb
2019/08/13 07:02 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8620c2c2 .config console log report syz C ci2-upstream-usb
2019/08/12 13:02 https://github.com/google/kasan.git usb-fuzzer e96407b49762 8620c2c2 .config console log report syz C ci2-upstream-usb
2019/08/10 06:32 https://github.com/google/kasan.git usb-fuzzer e96407b49762 acb51638 .config console log report syz C ci2-upstream-usb
2019/08/10 00:37 https://github.com/google/kasan.git usb-fuzzer e96407b49762 aff9e255 .config console log report syz C ci2-upstream-usb
2019/08/09 21:46 https://github.com/google/kasan.git usb-fuzzer e96407b49762 aff9e255 .config console log report syz C ci2-upstream-usb
2019/08/09 16:18 https://github.com/google/kasan.git usb-fuzzer e96407b49762 aff9e255 .config console log report syz C ci2-upstream-usb
2019/09/02 15:19 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 db7c31ca .config console log report ci2-upstream-usb
2019/09/02 14:18 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 db7c31ca .config console log report ci2-upstream-usb
2019/09/02 03:32 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/09/01 23:14 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/09/01 20:22 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/09/01 15:09 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/09/01 13:11 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/09/01 11:15 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/09/01 09:24 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/08/31 20:03 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/08/31 16:52 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/08/31 08:35 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bcd7bcc2 .config console log report ci2-upstream-usb
2019/08/31 06:35 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bcd7bcc2 .config console log report ci2-upstream-usb
2019/08/31 00:00 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 9adfa876 .config console log report ci2-upstream-usb
2019/08/30 09:53 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cd626f3b .config console log report ci2-upstream-usb
2019/08/30 01:36 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cd626f3b .config console log report ci2-upstream-usb
2019/08/29 21:33 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cd626f3b .config console log report ci2-upstream-usb
2019/08/29 16:47 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cd626f3b .config console log report ci2-upstream-usb
2019/08/29 09:34 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 40203c15 .config console log report ci2-upstream-usb
2019/08/29 08:00 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 40203c15 .config console log report ci2-upstream-usb
2019/08/29 03:23 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 40203c15 .config console log report ci2-upstream-usb
2019/08/28 23:34 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 40203c15 .config console log report ci2-upstream-usb
2019/08/28 19:29 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 1eb076e9 .config console log report ci2-upstream-usb
2019/08/28 16:55 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 1eb076e9 .config console log report ci2-upstream-usb
2019/08/27 17:16 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/27 12:39 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/27 07:46 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/27 06:03 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/26 17:32 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/26 15:37 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/25 19:09 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/25 13:32 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/25 07:16 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/24 19:01 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 78ded196 .config console log report ci2-upstream-usb
2019/08/24 02:47 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 78ded196 .config console log report ci2-upstream-usb
2019/08/23 20:22 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 78ded196 .config console log report ci2-upstream-usb
2019/08/23 06:41 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 ca6f3cfa .config console log report ci2-upstream-usb
2019/08/23 01:17 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 ca6f3cfa .config console log report ci2-upstream-usb
2019/08/22 19:12 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 c6c81a0b .config console log report ci2-upstream-usb
2019/08/22 00:49 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 4ea67ff8 .config console log report ci2-upstream-usb
2019/08/21 15:20 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 4ea67ff8 .config console log report ci2-upstream-usb
2019/08/21 01:22 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 6b8391d0 .config console log report ci2-upstream-usb
2019/08/20 17:26 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cfc9868f .config console log report ci2-upstream-usb
* Struck through repros no longer work on HEAD.