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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH master 1/2] startup: don't read glob_t if glob("/env/init/*") fails
Date: Wed, 22 Sep 2021 09:14:39 +0200	[thread overview]
Message-ID: <20210922071440.31949-1-a.fatoum@pengutronix.de> (raw)

globfree() is a no-op if glob_t::gl_pathv is NULL. A failed glob may not
always initialize this member however, leading to potential memory
corruption.

Fix this by only freeing the glob_t if glob() had succeeded.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 common/startup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/startup.c b/common/startup.c
index d170cb8a7c5a..871696968a14 100644
--- a/common/startup.c
+++ b/common/startup.c
@@ -345,9 +345,9 @@ static int run_init(void)
 			run_command(scr);
 			free(scr);
 		}
-	}
 
-	globfree(&g);
+		globfree(&g);
+	}
 
 	/* source matching script in /env/bmode/ */
 	bmode = reboot_mode_get();
-- 
2.30.2


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             reply	other threads:[~2021-09-22  7:16 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-22  7:14 Ahmad Fatoum [this message]
2021-09-22  7:14 ` [PATCH master 2/2] common: menutree: prevent read of uninitialized memory in error path Ahmad Fatoum
2021-10-01 13:29 ` [PATCH master 1/2] startup: don't read glob_t if glob("/env/init/*") fails Sascha Hauer

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