* [PATCH] xfs: Fix a memory leak bug in xfs_buf_item_init()
@ 2025-12-06 12:15 Haoxiang Li
2025-12-08 6:49 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Haoxiang Li @ 2025-12-06 12:15 UTC (permalink / raw)
To: cem, darrick.wong; +Cc: linux-xfs, linux-kernel, Haoxiang Li, stable
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>
---
fs/xfs/xfs_buf_item.c | 1 +
1 file changed, 1 insertion(+)
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!",
--
2.25.1
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2025-12-06 12:15 [PATCH] xfs: Fix a memory leak bug in xfs_buf_item_init() Haoxiang Li
2025-12-08 6:49 ` Christoph Hellwig
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