From 0babf94ff560a53b92586a2fcff88380e9d39893 Mon Sep 17 00:00:00 2001
From: Weifeng Su <suweifeng1@huawei.com>
Date: Thu, 8 Jun 2023 10:51:46 +0800
Subject: [PATCH] libxcmd: add return value check for dynamic memory function

The result check was missed and It cause the coredump like:
0x00005589f3e358dd in add_command (ci=0x5589f3e3f020 <health_cmd>) at command.c:37
0x00005589f3e337d8 in init_commands () at init.c:37
init (argc=<optimized out>, argv=0x7ffecfb0cd28) at init.c:102
0x00005589f3e33399 in main (argc=<optimized out>, argv=<optimized out>) at init.c:112

Add check for realloc function to ignore this coredump and exit with
error output

Signed-off-by: Weifeng Su <suweifeng1@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
---
 libxcmd/command.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libxcmd/command.c b/libxcmd/command.c
index a76d15158..e26030971 100644
--- a/libxcmd/command.c
+++ b/libxcmd/command.c
@@ -34,6 +34,10 @@ add_command(
 	const cmdinfo_t	*ci)
 {
 	cmdtab = realloc((void *)cmdtab, ++ncmds * sizeof(*cmdtab));
+	if (!cmdtab) {
+		perror(_("adding libxcmd command"));
+		exit(1);
+	}
 	cmdtab[ncmds - 1] = *ci;
 	qsort(cmdtab, ncmds, sizeof(*cmdtab), compare);
 }
-- 
2.47.3