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authorKrutika Dhananjay <kdhananj@redhat.com>2012-07-30 22:31:31 +0530
committerAnand Avati <avati@redhat.com>2012-08-01 00:03:15 -0700
commit5070aa3973066ba7347b14b4b993dcde11e08165 (patch)
treefc122a58e878e991decbbc77f3cd773a93832d0b /xlators/protocol/client
parent9fcc3f4dede2829d457b6e1c76f53c25ba790988 (diff)
protocol/client: Fix negative return in client_setvolume
PROBLEM: The function dict_serialized_length could, owing to an error, return a negative integer (-EINVAL) that gets assigned to an unsigned int member 'dict_len' of gf_setvolume_req structure. FIX: Hold the value returned by dict_serialized_length in local variable ret (which is a signed int). Test if ret is negative, in which case the control would anyway branch to the label fail where the function returns. Otherwise dict_len is assigned with ret, in turn giving a more meaningful value to the attribute length. TEST: Attached gdb to glusterfs mount process, set breakpoint at client_setvolume, forced dict_serialized_length to return -EINVAL (indirectly by forcing _dict_serialized_length to return -EINVAL after setting count to -1 within its body) and checked the value of ret (which is now sure to contain a negative value) whose value will be appropriately tested to decide the next course of action within client_setvolume: whether to simply exit due to an error or execute the subsequent statements. Change-Id: Ib22ad8f30d8ae04acaf2ff5bfee9c348a2c47148 BUG: 789278 Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com> Reviewed-on: http://review.gluster.com/3755 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/protocol/client')
-rw-r--r--xlators/protocol/client/src/client-handshake.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/xlators/protocol/client/src/client-handshake.c b/xlators/protocol/client/src/client-handshake.c
index 3242cf0..5c4816e 100644
--- a/xlators/protocol/client/src/client-handshake.c
+++ b/xlators/protocol/client/src/client-handshake.c
@@ -1554,13 +1554,14 @@ client_setvolume (xlator_t *this, struct rpc_clnt *rpc)
client_get_lk_ver (conf));
}
- req.dict.dict_len = dict_serialized_length (options);
- if (req.dict.dict_len < 0) {
+ ret = dict_serialized_length (options);
+ if (ret < 0) {
gf_log (this->name, GF_LOG_ERROR,
"failed to get serialized length of dict");
ret = -1;
goto fail;
}
+ req.dict.dict_len = ret;
req.dict.dict_val = GF_CALLOC (1, req.dict.dict_len,
gf_client_mt_clnt_req_buf_t);
ret = dict_serialize (options, req.dict.dict_val);