From: Jaegeuk Kim <jaegeuk@kernel.org>
To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Subject: [f2fs-dev] [PATCH 1/2] f2fs: deallocate compressed pages when error happens
Date: Mon, 30 Aug 2021 17:53:45 -0700 [thread overview]
Message-ID: <20210831005346.118701-1-jaegeuk@kernel.org> (raw)
In f2fs_write_multi_pages(), f2fs_compress_pages() allocates pages for
compression work in cc->cpages[]. Then, f2fs_write_compressed_pages() initiates
bio submission. But, if there's any error before submitting the IOs like early
f2fs_cp_error(), previously it didn't free cpages by f2fs_compress_free_page().
Let's fix memory leak by putting that just before deallocating cc->cpages.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/compress.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index ec70a0a32327..c1bf9ad4c220 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1394,12 +1394,6 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
for (--i; i >= 0; i--)
fscrypt_finalize_bounce_page(&cc->cpages[i]);
- for (i = 0; i < cc->nr_cpages; i++) {
- if (!cc->cpages[i])
- continue;
- f2fs_compress_free_page(cc->cpages[i]);
- cc->cpages[i] = NULL;
- }
out_put_cic:
kmem_cache_free(cic_entry_slab, cic);
out_put_dnode:
@@ -1410,6 +1404,12 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
else
f2fs_unlock_op(sbi);
out_free:
+ for (i = 0; i < cc->nr_cpages; i++) {
+ if (!cc->cpages[i])
+ continue;
+ f2fs_compress_free_page(cc->cpages[i]);
+ cc->cpages[i] = NULL;
+ }
page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
cc->cpages = NULL;
return -EAGAIN;
--
2.33.0.259.gc128427fd7-goog
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next reply other threads:[~2021-08-31 0:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-31 0:53 Jaegeuk Kim [this message]
2021-08-31 0:53 ` [f2fs-dev] [PATCH 2/2] f2fs: should put a page beyond EOF when preparing a write Jaegeuk Kim
2021-08-31 2:04 ` Chao Yu
2021-08-31 1:57 ` [f2fs-dev] [PATCH 1/2] f2fs: deallocate compressed pages when error happens Chao Yu
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