nbd: reclassify socket lock in nbd_reconnect_socket#1038
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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: d532cdd ("nbd: Reclassify sockets to avoid lockdep circular dependency") Signed-off-by: Yun Zhou <yun.zhou@windriver.com>
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Pull request for series with
subject: nbd: reclassify socket lock in nbd_reconnect_socket
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1122538