Hello,
syzbot found the following issue on:
HEAD commit: 0fa8ee0d Merge branch 'for-linus' of git://
git.kernel.org/..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=174a7fdc500000
kernel config:
https://syzkaller.appspot.com/x/.config?x=e9a6e9171a00e85a
dashboard link:
https://syzkaller.appspot.com/bug?extid=33e805418eaf7cfaa0fd
compiler: clang version 12.0.0 (
https://github.com/llvm/llvm-project.git 913f6005669cfb590c99865a90bc51ed0983d09d)
CC: [
da...@davemloft.net johan....@gmail.com ku...@kernel.org linux-b...@vger.kernel.org linux-...@vger.kernel.org mar...@holtmann.org net...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+33e805...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in __hci_req_sync / hci_req_sync_complete
write to 0xffff888136e82a70 of 4 bytes by task 8469 on cpu 0:
hci_req_sync_complete+0x5c/0x110 net/bluetooth/hci_request.c:109
hci_event_packet+0x3ab1/0xfed0 net/bluetooth/hci_event.c:6318
hci_rx_work+0x324/0x480 net/bluetooth/hci_core.c:4926
process_one_work+0x3e1/0x950 kernel/workqueue.c:2272
worker_thread+0x635/0xb90 kernel/workqueue.c:2418
kthread+0x1fa/0x220 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
read to 0xffff888136e82a70 of 4 bytes by task 8463 on cpu 1:
__hci_req_sync+0x159/0x420 net/bluetooth/hci_request.c:233
hci_req_sync+0x71/0x90 net/bluetooth/hci_request.c:279
hci_dev_cmd+0x244/0x590 net/bluetooth/hci_core.c:2043
hci_sock_ioctl+0x2e3/0x630 net/bluetooth/hci_sock.c:1052
sock_do_ioctl+0x4d/0x210 net/socket.c:1047
sock_ioctl+0x36e/0x5b0 net/socket.c:1198
vfs_ioctl fs/ioctl.c:48 [inline]
__do_sys_ioctl fs/ioctl.c:753 [inline]
__se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739
__x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8463 Comm: syz-executor.4 Not tainted 5.10.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
---
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