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afs: Fix afs_server_list to be cleaned up with RCU

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[ Upstream commit e6bace7313d61e31f2b16fa3d774fd8cb3cb869e ]

afs_server_list is accessed with the rcu_read_lock() held from
volume->servers, so it needs to be cleaned up correctly.

Fix this by using kfree_rcu() instead of kfree().

Fixes: 8a070a964877 ("afs: Detect cell aliases 1 - Cells with root volumes")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Howells 2023-11-02 16:26:59 +00:00 committed by Greg Kroah-Hartman
parent 6ac30d748b
commit 790ea5bc40
2 changed files with 2 additions and 1 deletions
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1
fs/afs/internal.h
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@ -552,6 +552,7 @@ struct afs_server_entry {
};
struct afs_server_list {
struct rcu_head rcu;
afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */
refcount_t usage;
unsigned char nr_servers;

2
fs/afs/server_list.c
View File

@ -17,7 +17,7 @@ void afs_put_serverlist(struct afs_net *net, struct afs_server_list *slist)
for (i = 0; i < slist->nr_servers; i++)
afs_unuse_server(net, slist->servers[i].server,
afs_server_trace_put_slist);
kfree(slist);
kfree_rcu(slist, rcu);
}
}