5.10-stable review patch. If anyone has any objections, please let me know.
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From: David Howells dhowells@redhat.com
[ 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 --- fs/afs/internal.h | 1 + fs/afs/server_list.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 637cbe549397c..31c7a562147c2 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -546,6 +546,7 @@ 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; diff --git a/fs/afs/server_list.c b/fs/afs/server_list.c index ed9056703505f..b59896b1de0af 100644 --- a/fs/afs/server_list.c +++ b/fs/afs/server_list.c @@ -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); } }