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Subject[PATCH] NFSv4: Fix a memory leak bug
Date
In nfs4_try_migration(), if nfs4_begin_drain_session() fails, the
previously allocated 'page' and 'locations' are not deallocated, leading to
memory leaks. To fix this issue, free 'page' and 'locations' before
returning the error.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
---
fs/nfs/nfs4state.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index cad4e06..37823dc 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -2095,8 +2095,12 @@ static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred
}

status = nfs4_begin_drain_session(clp);
- if (status != 0)
+ if (status != 0) {
+ if (page != NULL)
+ __free_page(page);
+ kfree(locations);
return status;
+ }

status = nfs4_replace_transport(server, locations);
if (status != 0) {
--
2.7.4
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