* KASAN: use-after-free Write in refcount_warn_saturate
@ 2020-02-28 7:50 syzbot
2020-07-06 3:32 ` use-after-free in Bluetooth: 6lowpan (was Re: KASAN: use-after-free Write in refcount_warn_saturate) Kees Cook
2020-09-04 14:44 ` KASAN: use-after-free Write in refcount_warn_saturate syzbot
0 siblings, 2 replies; 5+ messages in thread
From: syzbot @ 2020-02-28 7:50 UTC (permalink / raw)
To: davem, johan.hedberg, kuba, linux-bluetooth, linux-kernel,
marcel, netdev, syzkaller-bugs
Hello,
syzbot found the following crash on:
HEAD commit: f8788d86 Linux 5.6-rc3
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13005fd9e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9833e26bab355358
dashboard link: https://syzkaller.appspot.com/bug?extid=7dd7f2f77a7a01d1dc14
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
userspace arch: i386
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17e3ebede00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a9f8f9e00000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+7dd7f2f77a7a01d1dc14@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in atomic_set include/asm-generic/atomic-instrumented.h:44 [inline]
BUG: KASAN: use-after-free in refcount_set include/linux/refcount.h:123 [inline]
BUG: KASAN: use-after-free in refcount_warn_saturate+0x1f/0x1f0 lib/refcount.c:15
Write of size 4 at addr ffff888090eb4018 by task kworker/1:24/2888
CPU: 1 PID: 2888 Comm: kworker/1:24 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events do_enable_set
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x197/0x210 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
__kasan_report.cold+0x1b/0x32 mm/kasan/report.c:506
kasan_report+0x12/0x20 mm/kasan/common.c:641
check_memory_region_inline mm/kasan/generic.c:185 [inline]
check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192
__kasan_check_write+0x14/0x20 mm/kasan/common.c:101
atomic_set include/asm-generic/atomic-instrumented.h:44 [inline]
refcount_set include/linux/refcount.h:123 [inline]
refcount_warn_saturate+0x1f/0x1f0 lib/refcount.c:15
refcount_sub_and_test include/linux/refcount.h:261 [inline]
refcount_dec_and_test include/linux/refcount.h:281 [inline]
kref_put include/linux/kref.h:64 [inline]
l2cap_chan_put+0x1d9/0x240 net/bluetooth/l2cap_core.c:498
do_enable_set+0x54b/0x960 net/bluetooth/6lowpan.c:1075
process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
worker_thread+0x98/0xe40 kernel/workqueue.c:2410
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Allocated by task 2888:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
__kasan_kmalloc mm/kasan/common.c:515 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:488
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3551
kmalloc include/linux/slab.h:555 [inline]
kzalloc include/linux/slab.h:669 [inline]
l2cap_chan_create+0x45/0x3a0 net/bluetooth/l2cap_core.c:446
chan_create+0x10/0xe0 net/bluetooth/6lowpan.c:640
bt_6lowpan_listen net/bluetooth/6lowpan.c:959 [inline]
do_enable_set+0x583/0x960 net/bluetooth/6lowpan.c:1078
process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
worker_thread+0x98/0xe40 kernel/workqueue.c:2410
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Freed by task 2975:
save_stack+0x23/0x90 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
kasan_set_free_info mm/kasan/common.c:337 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
__cache_free mm/slab.c:3426 [inline]
kfree+0x10a/0x2c0 mm/slab.c:3757
l2cap_chan_destroy net/bluetooth/l2cap_core.c:484 [inline]
kref_put include/linux/kref.h:65 [inline]
l2cap_chan_put+0x1b7/0x240 net/bluetooth/l2cap_core.c:498
do_enable_set+0x54b/0x960 net/bluetooth/6lowpan.c:1075
process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
worker_thread+0x98/0xe40 kernel/workqueue.c:2410
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
The buggy address belongs to the object at ffff888090eb4000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 24 bytes inside of
2048-byte region [ffff888090eb4000, ffff888090eb4800)
The buggy address belongs to the page:
page:ffffea000243ad00 refcount:1 mapcount:0 mapping:ffff8880aa400e00 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002694048 ffffea000241e648 ffff8880aa400e00
raw: 0000000000000000 ffff888090eb4000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888090eb3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888090eb3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888090eb4000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888090eb4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888090eb4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: use-after-free in Bluetooth: 6lowpan (was Re: KASAN: use-after-free Write in refcount_warn_saturate)
2020-02-28 7:50 KASAN: use-after-free Write in refcount_warn_saturate syzbot
@ 2020-07-06 3:32 ` Kees Cook
2020-07-08 17:36 ` Ing. Josua Mayer
2020-09-04 14:44 ` KASAN: use-after-free Write in refcount_warn_saturate syzbot
1 sibling, 1 reply; 5+ messages in thread
From: Kees Cook @ 2020-07-06 3:32 UTC (permalink / raw)
To: Jukka Rissanen, Johan Hedberg
Cc: davem, kuba, linux-bluetooth, linux-kernel, marcel, netdev,
syzkaller-bugs, syzbot, Michael Scott, Josua Mayer
On Thu, Feb 27, 2020 at 11:50:11PM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit: f8788d86 Linux 5.6-rc3
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13005fd9e00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=9833e26bab355358
> dashboard link: https://syzkaller.appspot.com/bug?extid=7dd7f2f77a7a01d1dc14
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> userspace arch: i386
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17e3ebede00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a9f8f9e00000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+7dd7f2f77a7a01d1dc14@syzkaller.appspotmail.com
>
> ==================================================================
> BUG: KASAN: use-after-free in atomic_set include/asm-generic/atomic-instrumented.h:44 [inline]
> BUG: KASAN: use-after-free in refcount_set include/linux/refcount.h:123 [inline]
> BUG: KASAN: use-after-free in refcount_warn_saturate+0x1f/0x1f0 lib/refcount.c:15
> Write of size 4 at addr ffff888090eb4018 by task kworker/1:24/2888
>
> CPU: 1 PID: 2888 Comm: kworker/1:24 Not tainted 5.6.0-rc3-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> Workqueue: events do_enable_set
> Call Trace:
> __dump_stack lib/dump_stack.c:77 [inline]
> dump_stack+0x197/0x210 lib/dump_stack.c:118
> print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
> __kasan_report.cold+0x1b/0x32 mm/kasan/report.c:506
> kasan_report+0x12/0x20 mm/kasan/common.c:641
> check_memory_region_inline mm/kasan/generic.c:185 [inline]
> check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192
> __kasan_check_write+0x14/0x20 mm/kasan/common.c:101
> atomic_set include/asm-generic/atomic-instrumented.h:44 [inline]
> refcount_set include/linux/refcount.h:123 [inline]
> refcount_warn_saturate+0x1f/0x1f0 lib/refcount.c:15
> refcount_sub_and_test include/linux/refcount.h:261 [inline]
> refcount_dec_and_test include/linux/refcount.h:281 [inline]
> kref_put include/linux/kref.h:64 [inline]
> l2cap_chan_put+0x1d9/0x240 net/bluetooth/l2cap_core.c:498
> do_enable_set+0x54b/0x960 net/bluetooth/6lowpan.c:1075
> process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
> worker_thread+0x98/0xe40 kernel/workqueue.c:2410
> kthread+0x361/0x430 kernel/kthread.c:255
> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
>
> Allocated by task 2888:
> save_stack+0x23/0x90 mm/kasan/common.c:72
> set_track mm/kasan/common.c:80 [inline]
> __kasan_kmalloc mm/kasan/common.c:515 [inline]
> __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:488
> kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
> kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3551
> kmalloc include/linux/slab.h:555 [inline]
> kzalloc include/linux/slab.h:669 [inline]
> l2cap_chan_create+0x45/0x3a0 net/bluetooth/l2cap_core.c:446
> chan_create+0x10/0xe0 net/bluetooth/6lowpan.c:640
> bt_6lowpan_listen net/bluetooth/6lowpan.c:959 [inline]
> do_enable_set+0x583/0x960 net/bluetooth/6lowpan.c:1078
> process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
> worker_thread+0x98/0xe40 kernel/workqueue.c:2410
> kthread+0x361/0x430 kernel/kthread.c:255
> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
>
> Freed by task 2975:
> save_stack+0x23/0x90 mm/kasan/common.c:72
> set_track mm/kasan/common.c:80 [inline]
> kasan_set_free_info mm/kasan/common.c:337 [inline]
> __kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
> kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
> __cache_free mm/slab.c:3426 [inline]
> kfree+0x10a/0x2c0 mm/slab.c:3757
> l2cap_chan_destroy net/bluetooth/l2cap_core.c:484 [inline]
> kref_put include/linux/kref.h:65 [inline]
> l2cap_chan_put+0x1b7/0x240 net/bluetooth/l2cap_core.c:498
> do_enable_set+0x54b/0x960 net/bluetooth/6lowpan.c:1075
> process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
> worker_thread+0x98/0xe40 kernel/workqueue.c:2410
> kthread+0x361/0x430 kernel/kthread.c:255
> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
The free and use-after-free are both via the same do_enable_set() path
which implies there are racing writes to the debugfs write handler. It
seems locking is missing for both listen_chan and enable_6lowpan. The
latter seems misused in is_bt_6lowpan(), which should likely just be
checking for chan->ops == &bt_6lowpan_chan_ops, I think?
I have no way to actually test changes to this code...
--
Kees Cook
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: use-after-free in Bluetooth: 6lowpan (was Re: KASAN: use-after-free Write in refcount_warn_saturate)
2020-07-06 3:32 ` use-after-free in Bluetooth: 6lowpan (was Re: KASAN: use-after-free Write in refcount_warn_saturate) Kees Cook
@ 2020-07-08 17:36 ` Ing. Josua Mayer
0 siblings, 0 replies; 5+ messages in thread
From: Ing. Josua Mayer @ 2020-07-08 17:36 UTC (permalink / raw)
To: Kees Cook, Jukka Rissanen, Johan Hedberg
Cc: davem, kuba, linux-bluetooth, linux-kernel, marcel, netdev,
syzkaller-bugs, syzbot, Michael Scott, Josua Mayer
Greetings everybody,
Am 06.07.20 um 05:32 schrieb Kees Cook:
> On Thu, Feb 27, 2020 at 11:50:11PM -0800, syzbot wrote:
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit: f8788d86 Linux 5.6-rc3
>> git tree: upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=13005fd9e00000
>> kernel config: https://syzkaller.appspot.com/x/.config?x=9833e26bab355358
>> dashboard link: https://syzkaller.appspot.com/bug?extid=7dd7f2f77a7a01d1dc14
>> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
>> userspace arch: i386
>> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17e3ebede00000
>> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a9f8f9e00000
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+7dd7f2f77a7a01d1dc14@syzkaller.appspotmail.com
>>
>> ==================================================================
>> BUG: KASAN: use-after-free in atomic_set include/asm-generic/atomic-instrumented.h:44 [inline]
>> BUG: KASAN: use-after-free in refcount_set include/linux/refcount.h:123 [inline]
>> BUG: KASAN: use-after-free in refcount_warn_saturate+0x1f/0x1f0 lib/refcount.c:15
>> Write of size 4 at addr ffff888090eb4018 by task kworker/1:24/2888
>>
>> CPU: 1 PID: 2888 Comm: kworker/1:24 Not tainted 5.6.0-rc3-syzkaller #0
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
>> Workqueue: events do_enable_set
>> Call Trace:
>> __dump_stack lib/dump_stack.c:77 [inline]
>> dump_stack+0x197/0x210 lib/dump_stack.c:118
>> print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374
>> __kasan_report.cold+0x1b/0x32 mm/kasan/report.c:506
>> kasan_report+0x12/0x20 mm/kasan/common.c:641
>> check_memory_region_inline mm/kasan/generic.c:185 [inline]
>> check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192
>> __kasan_check_write+0x14/0x20 mm/kasan/common.c:101
>> atomic_set include/asm-generic/atomic-instrumented.h:44 [inline]
>> refcount_set include/linux/refcount.h:123 [inline]
>> refcount_warn_saturate+0x1f/0x1f0 lib/refcount.c:15
>> refcount_sub_and_test include/linux/refcount.h:261 [inline]
>> refcount_dec_and_test include/linux/refcount.h:281 [inline]
>> kref_put include/linux/kref.h:64 [inline]
>> l2cap_chan_put+0x1d9/0x240 net/bluetooth/l2cap_core.c:498
>> do_enable_set+0x54b/0x960 net/bluetooth/6lowpan.c:1075
>> process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
>> worker_thread+0x98/0xe40 kernel/workqueue.c:2410
>> kthread+0x361/0x430 kernel/kthread.c:255
>> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
>>
>> Allocated by task 2888:
>> save_stack+0x23/0x90 mm/kasan/common.c:72
>> set_track mm/kasan/common.c:80 [inline]
>> __kasan_kmalloc mm/kasan/common.c:515 [inline]
>> __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:488
>> kasan_kmalloc+0x9/0x10 mm/kasan/common.c:529
>> kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3551
>> kmalloc include/linux/slab.h:555 [inline]
>> kzalloc include/linux/slab.h:669 [inline]
>> l2cap_chan_create+0x45/0x3a0 net/bluetooth/l2cap_core.c:446
>> chan_create+0x10/0xe0 net/bluetooth/6lowpan.c:640
>> bt_6lowpan_listen net/bluetooth/6lowpan.c:959 [inline]
>> do_enable_set+0x583/0x960 net/bluetooth/6lowpan.c:1078
>> process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
>> worker_thread+0x98/0xe40 kernel/workqueue.c:2410
>> kthread+0x361/0x430 kernel/kthread.c:255
>> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
>>
>> Freed by task 2975:
>> save_stack+0x23/0x90 mm/kasan/common.c:72
>> set_track mm/kasan/common.c:80 [inline]
>> kasan_set_free_info mm/kasan/common.c:337 [inline]
>> __kasan_slab_free+0x102/0x150 mm/kasan/common.c:476
>> kasan_slab_free+0xe/0x10 mm/kasan/common.c:485
>> __cache_free mm/slab.c:3426 [inline]
>> kfree+0x10a/0x2c0 mm/slab.c:3757
>> l2cap_chan_destroy net/bluetooth/l2cap_core.c:484 [inline]
>> kref_put include/linux/kref.h:65 [inline]
>> l2cap_chan_put+0x1b7/0x240 net/bluetooth/l2cap_core.c:498
>> do_enable_set+0x54b/0x960 net/bluetooth/6lowpan.c:1075
>> process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
>> worker_thread+0x98/0xe40 kernel/workqueue.c:2410
>> kthread+0x361/0x430 kernel/kthread.c:255
>> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
>
> The free and use-after-free are both via the same do_enable_set() path
> which implies there are racing writes to the debugfs write handler. It
> seems locking is missing for both listen_chan and enable_6lowpan. The
> latter seems misused in is_bt_6lowpan(), which should likely just be
> checking for chan->ops == &bt_6lowpan_chan_ops, I think?
>
> I have no way to actually test changes to this code...
>
I do have limited hardware for testing bluetooth 6lowpan connections,
but am a little busy these weeks. So some time by the end of this month
I should be able to at least verify if my use-case would be broken by a
change, if somebody were to propose one ;)
br
Josua Mayer
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: KASAN: use-after-free Write in refcount_warn_saturate
2020-02-28 7:50 KASAN: use-after-free Write in refcount_warn_saturate syzbot
2020-07-06 3:32 ` use-after-free in Bluetooth: 6lowpan (was Re: KASAN: use-after-free Write in refcount_warn_saturate) Kees Cook
@ 2020-09-04 14:44 ` syzbot
2020-11-11 13:25 ` Dmitry Vyukov
1 sibling, 1 reply; 5+ messages in thread
From: syzbot @ 2020-09-04 14:44 UTC (permalink / raw)
To: abhishekpandit, alainm, davem, johan.hedberg, johan.hedberg,
josua.mayer, jukka.rissanen, keescook, kuba, linux-bluetooth,
linux-kernel, marcel, mcchou, mike, netdev, syzkaller-bugs
syzbot suspects this issue was fixed by commit:
commit b83764f9220a4a14525657466f299850bbc98de9
Author: Miao-chen Chou <mcchou@chromium.org>
Date: Tue Jun 30 03:15:00 2020 +0000
Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10f92e3e900000
start commit: c0842fbc random32: move the pseudo-random 32-bit definitio..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=cf567e8c7428377e
dashboard link: https://syzkaller.appspot.com/bug?extid=7dd7f2f77a7a01d1dc14
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b606dc900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123e87cc900000
If the result looks correct, please mark the issue as fixed by replying with:
#syz fix: Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: KASAN: use-after-free Write in refcount_warn_saturate
2020-09-04 14:44 ` KASAN: use-after-free Write in refcount_warn_saturate syzbot
@ 2020-11-11 13:25 ` Dmitry Vyukov
0 siblings, 0 replies; 5+ messages in thread
From: Dmitry Vyukov @ 2020-11-11 13:25 UTC (permalink / raw)
To: syzbot, syzkaller-bugs, netdev, LKML, linux-bluetooth
On Fri, Sep 4, 2020 at 4:44 PM syzbot
<syzbot+7dd7f2f77a7a01d1dc14@syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit b83764f9220a4a14525657466f299850bbc98de9
> Author: Miao-chen Chou <mcchou@chromium.org>
> Date: Tue Jun 30 03:15:00 2020 +0000
>
> Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10f92e3e900000
> start commit: c0842fbc random32: move the pseudo-random 32-bit definitio..
> git tree: upstream
> kernel config: https://syzkaller.appspot.com/x/.config?x=cf567e8c7428377e
> dashboard link: https://syzkaller.appspot.com/bug?extid=7dd7f2f77a7a01d1dc14
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b606dc900000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123e87cc900000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
#syz fix: Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-11-11 13:25 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-02-28 7:50 KASAN: use-after-free Write in refcount_warn_saturate syzbot
2020-07-06 3:32 ` use-after-free in Bluetooth: 6lowpan (was Re: KASAN: use-after-free Write in refcount_warn_saturate) Kees Cook
2020-07-08 17:36 ` Ing. Josua Mayer
2020-09-04 14:44 ` KASAN: use-after-free Write in refcount_warn_saturate syzbot
2020-11-11 13:25 ` Dmitry Vyukov
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