From 27198a4c26f10f8cef222b6d3be4d1509ab055cb Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.com>
Date: Wed, 3 Apr 2024 23:10:22 +0200
Subject: [PATCH] btrfs-progs: fix freeing of device after error in
 btrfs_add_to_fsid()
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Reported by 'gcc -fanalyzer':
common/device-scan.c:222:20: warning: dereference of NULL ‘device’ [CWE-476] [-Wanalyzer-null-dereference]

If the allocation of device fails then we can't free device->zone_info
at the out label. To fix that return immediately as it's at the
beginning of the function.

Signed-off-by: David Sterba <dsterba@suse.com>
---
 common/device-scan.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/common/device-scan.c b/common/device-scan.c
index c1cd726..630220a 100644
--- a/common/device-scan.c
+++ b/common/device-scan.c
@@ -144,10 +144,9 @@ int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
 	device_total_bytes = (device_total_bytes / sectorsize) * sectorsize;
 
 	device = calloc(1, sizeof(*device));
-	if (!device) {
-		ret = -ENOMEM;
-		goto out;
-	}
+	if (!device)
+		return -ENOMEM;
+
 	buf = calloc(1, sectorsize);
 	if (!buf) {
 		ret = -ENOMEM;
-- 
2.27.0