From: Filipe Manana <fdmanana@suse.com>
Date: Fri, 30 Jan 2026 17:06:45 +0000 (+0000)
Subject: btrfs: raid56: fix memory leak of btrfs_raid_bio::stripe_uptodate_bitmap
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29fb415a6a72c9207d118dd0a7a37184a14a3680;p=thirdparty%2Flinux.git

btrfs: raid56: fix memory leak of btrfs_raid_bio::stripe_uptodate_bitmap

We allocate the bitmap but we never free it in free_raid_bio_pointers().
Fix this by adding a bitmap_free() call against the stripe_uptodate_bitmap
of a raid bio.

Fixes: 1810350b04ef ("btrfs: raid56: move sector_ptr::uptodate into a dedicated bitmap")
Reported-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/linux-btrfs/20260126045315.GA31641@lst.de/
Reviewed-by: Qu Wenruo <wqu@suse.com>
Tested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index f38d8305e46d..baadaaa189c0 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -150,6 +150,7 @@ static void scrub_rbio_work_locked(struct work_struct *work);
 static void free_raid_bio_pointers(struct btrfs_raid_bio *rbio)
 {
 	bitmap_free(rbio->error_bitmap);
+	bitmap_free(rbio->stripe_uptodate_bitmap);
 	kfree(rbio->stripe_pages);
 	kfree(rbio->bio_paddrs);
 	kfree(rbio->stripe_paddrs);