From: syzbot <syzbot+f4fb0eaafdb51c32a153@syzkaller.appspotmail.com>
To: corbet@lwn.net, coreteam@netfilter.org, davem@davemloft.net,
johan.hedberg@gmail.com, kaber@trash.net,
kadlec@blackhole.kfki.hu, kuba@kernel.org,
linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, linux@armlinux.org.uk,
marcel@holtmann.org, mchehab@kernel.org,
mchehab@s-opensource.com, netdev@vger.kernel.org,
netfilter-devel@vger.kernel.org, pablo@netfilter.org,
syzkaller-bugs@googlegroups.com
Subject: KASAN: null-ptr-deref Write in amp_read_loc_assoc_final_data
Date: Fri, 31 Jul 2020 10:04:21 -0700 [thread overview]
Message-ID: <000000000000c18f1a05abbfc792@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 83bdc727 random32: remove net_rand_state from the latent e..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=176e5d12900000
kernel config: https://syzkaller.appspot.com/x/.config?x=e59ee776d5aa8d55
dashboard link: https://syzkaller.appspot.com/bug?extid=f4fb0eaafdb51c32a153
compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13d5ed24900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1381a56c900000
The issue was bisected to:
commit a4585c31c5018578b4abf699ddfdff719dd1c313
Author: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Tue Oct 18 19:44:09 2016 +0000
[media] marvell-ccic: don't break long lines
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=160d627c900000
final oops: https://syzkaller.appspot.com/x/report.txt?x=150d627c900000
console output: https://syzkaller.appspot.com/x/log.txt?x=110d627c900000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f4fb0eaafdb51c32a153@syzkaller.appspotmail.com
Fixes: a4585c31c501 ("[media] marvell-ccic: don't break long lines")
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:71 [inline]
BUG: KASAN: null-ptr-deref in set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
BUG: KASAN: null-ptr-deref in amp_read_loc_assoc_final_data+0x115/0x260 net/bluetooth/amp.c:304
Write of size 8 at addr 0000000000000030 by task kworker/u5:2/6842
CPU: 1 PID: 6842 Comm: kworker/u5:2 Not tainted 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1f0/0x31e lib/dump_stack.c:118
__kasan_report mm/kasan/report.c:517 [inline]
kasan_report+0x151/0x1d0 mm/kasan/report.c:530
check_memory_region_inline mm/kasan/generic.c:183 [inline]
check_memory_region+0x2b5/0x2f0 mm/kasan/generic.c:192
instrument_atomic_write include/linux/instrumented.h:71 [inline]
set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
amp_read_loc_assoc_final_data+0x115/0x260 net/bluetooth/amp.c:304
hci_chan_selected_evt net/bluetooth/hci_event.c:4897 [inline]
hci_event_packet+0x8289/0x18240 net/bluetooth/hci_event.c:6164
hci_rx_work+0x236/0x9c0 net/bluetooth/hci_core.c:4705
process_one_work+0x789/0xfc0 kernel/workqueue.c:2269
worker_thread+0xaa4/0x1460 kernel/workqueue.c:2415
kthread+0x37e/0x3a0 drivers/block/aoe/aoecmd.c:1234
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 6842 Comm: kworker/u5:2 Tainted: G B 5.8.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1f0/0x31e lib/dump_stack.c:118
panic+0x264/0x7a0 kernel/panic.c:231
end_report mm/kasan/report.c:104 [inline]
__kasan_report mm/kasan/report.c:520 [inline]
kasan_report+0x1c9/0x1d0 mm/kasan/report.c:530
check_memory_region_inline mm/kasan/generic.c:183 [inline]
check_memory_region+0x2b5/0x2f0 mm/kasan/generic.c:192
instrument_atomic_write include/linux/instrumented.h:71 [inline]
set_bit include/asm-generic/bitops/instrumented-atomic.h:28 [inline]
amp_read_loc_assoc_final_data+0x115/0x260 net/bluetooth/amp.c:304
hci_chan_selected_evt net/bluetooth/hci_event.c:4897 [inline]
hci_event_packet+0x8289/0x18240 net/bluetooth/hci_event.c:6164
hci_rx_work+0x236/0x9c0 net/bluetooth/hci_core.c:4705
process_one_work+0x789/0xfc0 kernel/workqueue.c:2269
worker_thread+0xaa4/0x1460 kernel/workqueue.c:2415
kthread+0x37e/0x3a0 drivers/block/aoe/aoecmd.c:1234
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Kernel Offset: disabled
Rebooting in 86400 seconds..
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
reply other threads:[~2020-07-31 17:04 UTC|newest]
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