From: Colin Ian King Date: Wed, 26 May 2021 14:46:05 +0000 (+0100) Subject: fs: dlm: Fix memory leak of object mh X-Git-Tag: microblaze-v5.15~136^2~9 X-Git-Url: http://git.monstr.eu/?p=linux-2.6-microblaze.git;a=commitdiff_plain;h=f6089981d07e6e1cc053f4c239e458eed122c092 fs: dlm: Fix memory leak of object mh There is an error return path that is not kfree'ing mh after it has been successfully allocates. Fix this by moving the call to create_rcom to after the check on rc_in->rc_id check to avoid this. Thanks to Alexander Ahring Oder Aring for suggesting the correct way to fix this. Addresses-Coverity: ("Resource leak") Fixes: a070a91cf140 ("fs: dlm: add more midcomms hooks") Signed-off-by: Colin Ian King Signed-off-by: David Teigland --- diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c index 085f21966c72..a7727b9e5e83 100644 --- a/fs/dlm/rcom.c +++ b/fs/dlm/rcom.c @@ -385,10 +385,6 @@ static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in) int error, ret_nodeid, nodeid = rc_in->rc_header.h_nodeid; int len = rc_in->rc_header.h_length - sizeof(struct dlm_rcom); - error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh); - if (error) - return; - /* Old code would send this special id to trigger a debug dump. */ if (rc_in->rc_id == 0xFFFFFFFF) { log_error(ls, "receive_rcom_lookup dump from %d", nodeid); @@ -396,6 +392,10 @@ static void receive_rcom_lookup(struct dlm_ls *ls, struct dlm_rcom *rc_in) return; } + error = create_rcom(ls, nodeid, DLM_RCOM_LOOKUP_REPLY, 0, &rc, &mh); + if (error) + return; + error = dlm_master_lookup(ls, nodeid, rc_in->rc_buf, len, DLM_LU_RECOVER_MASTER, &ret_nodeid, NULL); if (error)