From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhilong Liu Subject: [PATCH] mdadm/Monitor:triggers core dump when stat2devnm return NULL Date: Mon, 20 Mar 2017 13:21:41 +0800 Message-ID: <1489987301-22836-1-git-send-email-zlliu@suse.com> Return-path: Sender: linux-raid-owner@vger.kernel.org To: jes.sorensen@gmail.com Cc: linux-raid@vger.kernel.org, Zhilong Liu List-Id: linux-raid.ids Monitor: ensure that the device should be a block device when uses --wait parameter, such as the 'f' and 'd' type file would be triggered core dumped. such as: ./mdadm --wait /dev/md/ Reviewed-by: NeilBrown Signed-off-by: Zhilong Liu --- Monitor.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/Monitor.c b/Monitor.c index 802a9d9..f8850d3 100644 --- a/Monitor.c +++ b/Monitor.c @@ -1002,7 +1002,12 @@ int Wait(char *dev) strerror(errno)); return 2; } - strcpy(devnm, stat2devnm(&stb)); + char *tmp = stat2devnm(&stb); + if (!tmp) { + pr_err("%s is not a block device.\n", dev); + return 2; + } + strcpy(devnm, tmp); while(1) { struct mdstat_ent *ms = mdstat_read(1, 0); -- 2.6.6