tree d31e4ede4ee870be168780b788e4ddf6ddecada3
parent c4e9b3a8de7f0d5cf7e092a29d1f3c5030046bc8
author Steven Price <steven.price@arm.com> 1758116654 +0100
committer Will Deacon <will@kernel.org> 1758192168 +0100

net/uip: Avoid deadlock in uip_tcp_socket_free()

The function uip_tcp_socket_free() is called with the sk lock held, but
then goes on to call uip_tcp_socket_close() which attempts to aquire the
lock a second time, triggering a deadlock if there are outstanding TCP
connections.

Rename the existing uip_tcp_socket_close() to a _locked variety and
removing the locking from it. Add a new uip_tcp_socket_close() which
takes the lock and calls the _locked variety.

Fixes: d87b503f4d6e ("net/uip: Add exit function")
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>