The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x fc40459de82543b565ebc839dca8f7987f16f62e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025122919-balancing-colony-41ee@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From fc40459de82543b565ebc839dca8f7987f16f62e Mon Sep 17 00:00:00 2001 From: Haoxiang Li lihaoxiang@isrc.iscas.ac.cn Date: Wed, 10 Dec 2025 17:06:01 +0800 Subject: [PATCH] xfs: fix a memory leak in xfs_buf_item_init()

xfs_buf_item_get_format() may allocate memory for bip->bli_formats, free the memory in the error path.

Fixes: c3d5f0c2fb85 ("xfs: complain if anyone tries to create a too-large buffer log item") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li lihaoxiang@isrc.iscas.ac.cn Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Carlos Maiolino cmaiolino@redhat.com Signed-off-by: Carlos Maiolino cem@kernel.org

diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index 8d85b5eee444..f4c5be67826e 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -896,6 +896,7 @@ xfs_buf_item_init( map_size = DIV_ROUND_UP(chunks, NBWORD);

if (map_size > XFS_BLF_DATAMAP_SIZE) { + xfs_buf_item_free_format(bip); kmem_cache_free(xfs_buf_item_cache, bip); xfs_err(mp, "buffer item dirty bitmap (%u uints) too small to reflect %u bytes!",