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malwarescore=0 spamscore=0 clxscore=1015 adultscore=0 priorityscore=1501 impostorscore=0 phishscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607190136 Friendly ping. On 7/6/2026 11:57 PM, Yun Zhou wrote: > nbd_reconnect_socket() obtains a new socket via nbd_get_socket() but > does not call nbd_reclassify_socket(), leaving the socket's sk_lock in > the default AF_INET6 lockdep class. This causes false circular lock > dependency warnings because lockdep merges the NBD socket's sk_lock > with unrelated sockets (e.g., rawv6_sendmsg) that establish a > sk_lock -> fs_reclaim dependency in normal operation. > > nbd_add_socket() already reclassifies correctly on the initial connect > path, but the reconnect path was missed. > > Add the missing nbd_reclassify_socket() call after nbd_get_socket() in > nbd_reconnect_socket(). > > Reported-by: syzbot+576095eed5658cbd9b63@syzkaller.appspotmail.com > Closes: https://syzkaller.appspot.com/bug?extid=576095eed5658cbd9b63 > Fixes: d532cddb6c60 ("nbd: Reclassify sockets to avoid lockdep circular dependency") > Signed-off-by: Yun Zhou > --- > drivers/block/nbd.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c > index 8c6028e71e83..70a04d541ea4 100644 > --- a/drivers/block/nbd.c > +++ b/drivers/block/nbd.c > @@ -1386,6 +1386,8 @@ static int nbd_reconnect_socket(struct nbd_device *nbd, unsigned long arg) > if (!sock) > return err; > > + nbd_reclassify_socket(sock); > + > args = kzalloc_obj(*args); > if (!args) { > sockfd_put(sock);