This is a note to let you know that I've just added the patch titled
btrfs: sysfs: validate scrub_speed_max value
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-sysfs-validate-scrub_speed_max-value.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2b0122aaa800b021e36027d7f29e206f87c761d6 Mon Sep 17 00:00:00 2001
From: David Disseldorp <ddiss@xxxxxxx>
Date: Fri, 8 Dec 2023 11:41:56 +1100
Subject: btrfs: sysfs: validate scrub_speed_max value
From: David Disseldorp <ddiss@xxxxxxx>
commit 2b0122aaa800b021e36027d7f29e206f87c761d6 upstream.
The value set as scrub_speed_max accepts size with suffixes
(k/m/g/t/p/e) but we should still validate it for trailing characters,
similar to what we do with chunk_size_store.
CC: stable@xxxxxxxxxxxxxxx # 5.15+
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/sysfs.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -1760,6 +1760,10 @@ static ssize_t btrfs_devinfo_scrub_speed
unsigned long long limit;
limit = memparse(buf, &endptr);
+ /* There could be trailing '\n', also catch any typos after the value. */
+ endptr = skip_spaces(endptr);
+ if (*endptr != 0)
+ return -EINVAL;
WRITE_ONCE(device->scrub_speed_max, limit);
return len;
}
Patches currently in stable-queue which might be from ddiss@xxxxxxx are
queue-6.6/btrfs-sysfs-validate-scrub_speed_max-value.patch
