From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH master 6/7] fs: don't free device in remove callback
Date: Mon, 14 Sep 2020 12:05:52 +0200 [thread overview]
Message-ID: <20200914100553.24808-6-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20200914100553.24808-1-a.fatoum@pengutronix.de>
The probe doesn't allocate the device, so remove shouldn't free it
either. This fixes a use-after-free on barebox shutdown:
Iterating over the list of devices requires that remove callbacks
don't remove the devices. This happened to work so far, because
apparently not much new allocations are going on during barebox
shutdown, but let's do it right.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
fs/fs.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/fs/fs.c b/fs/fs.c
index 17f4aee80fd4..303b62ae1718 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -710,7 +710,6 @@ static void fs_remove(struct device_d *dev)
mntput(fsdev->vfsmount.parent);
free(fsdev->backingstore);
- free(fsdev);
}
struct bus_type fs_bus = {
--
2.28.0
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next prev parent reply other threads:[~2020-09-14 10:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-14 10:05 [PATCH master 1/7] sandbox: hostfile: error out if file couldn't be opened Ahmad Fatoum
2020-09-14 10:05 ` [PATCH master 2/7] sandbox: add_image: support mmaping block devices on 32-bit hosts Ahmad Fatoum
2020-09-14 10:05 ` [PATCH master 3/7] sandbox: support escaping commas in --image filenames Ahmad Fatoum
2020-09-14 13:42 ` Ahmad Fatoum
2020-09-14 10:05 ` [PATCH master 4/7] readkey: fix buffer overflow handling longer escape sequences Ahmad Fatoum
2020-09-14 10:05 ` [PATCH master 5/7] sandbox: fix SANDBOX_UNWIND dependency to be KASAN only Ahmad Fatoum
2020-09-14 10:05 ` Ahmad Fatoum [this message]
2020-09-14 10:05 ` [PATCH master 7/7] common: ubsan: replace pr_err with printf Ahmad Fatoum
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