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f2fs: deallocate compressed pages when error happens

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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.

Fixes: 4c8ff7095b ("f2fs: support data compression")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2021-08-30 11:37:32 -07:00
parent f7db8dd698
commit 827f02842e
1 changed files with 6 additions and 6 deletions
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12
fs/f2fs/compress.c
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@ -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;