lkml.org 
[lkml]   [2022]   [Aug]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.4 156/389] mtd: rawnand: meson: Fix a potential double free issue
Date
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit ec0da06337751b18f6dee06b6526e0f0d6e80369 ]

When meson_nfc_nand_chip_cleanup() is called, it will call:
meson_nfc_free_buffer(&meson_chip->nand);
nand_cleanup(&meson_chip->nand);

nand_cleanup() in turn will call nand_detach() which calls the
.detach_chip() which is here meson_nand_detach_chip().

meson_nand_detach_chip() already calls meson_nfc_free_buffer(), so we
could double free some memory.

Fix it by removing the unneeded explicit call to meson_nfc_free_buffer().

Fixes: 8fae856c5350 ("mtd: rawnand: meson: add support for Amlogic NAND flash controller")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Liang Yang <liang.yang@amlogic.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/ec15c358b8063f7c50ff4cd628cf0d2e14e43f49.1653064877.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mtd/nand/raw/meson_nand.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index ab7ab6a279aa..28dc26e1a20a 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -1304,7 +1304,6 @@ static int meson_nfc_nand_chip_cleanup(struct meson_nfc *nfc)
if (ret)
return ret;

- meson_nfc_free_buffer(&meson_chip->nand);
nand_cleanup(&meson_chip->nand);
list_del(&meson_chip->node);
}
--
2.35.1


\
 
 \ /
  Last update: 2022-08-23 13:29    [W:1.035 / U:0.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site