From: Bin Lan <lanbincn@139.com>
To: gregkh@linuxfoundation.org, sashal@kernel.org, stable@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, lanbincn@139.com,
zhiguo.niu@unisoc.com, baocong.liu@unisoc.com, chao@kernel.org,
jaegeuk@kernel.org, daehojeong@google.com
Subject: [PATCH 6.1.y 1/2] f2fs: compress: change the first parameter of page_array_{alloc,free} to sbi
Date: Tue, 12 May 2026 15:50:09 +0800 [thread overview]
Message-ID: <20260512075010.29584-2-lanbincn@139.com> (raw)
In-Reply-To: <20260512075010.29584-1-lanbincn@139.com>
From: Zhiguo Niu <zhiguo.niu@unisoc.com>
[ Upstream commit 8e2a9b656474d67c55010f2c003ea2cf889a19ff ]
No logic changes, just cleanup and prepare for fixing the UAF issue
in f2fs_free_dic.
Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com>
Signed-off-by: Baocong Liu <baocong.liu@unisoc.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Bin Lan <lanbincn@139.com>
---
fs/f2fs/compress.c | 40 ++++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 20 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 84585dba86a5..656c11a821c2 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -23,20 +23,18 @@
static struct kmem_cache *cic_entry_slab;
static struct kmem_cache *dic_entry_slab;
-static void *page_array_alloc(struct inode *inode, int nr)
+static void *page_array_alloc(struct f2fs_sb_info *sbi, int nr)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
unsigned int size = sizeof(struct page *) * nr;
if (likely(size <= sbi->page_array_slab_size))
return f2fs_kmem_cache_alloc(sbi->page_array_slab,
- GFP_F2FS_ZERO, false, F2FS_I_SB(inode));
+ GFP_F2FS_ZERO, false, sbi);
return f2fs_kzalloc(sbi, size, GFP_NOFS);
}
-static void page_array_free(struct inode *inode, void *pages, int nr)
+static void page_array_free(struct f2fs_sb_info *sbi, void *pages, int nr)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
unsigned int size = sizeof(struct page *) * nr;
if (!pages)
@@ -145,13 +143,13 @@ int f2fs_init_compress_ctx(struct compress_ctx *cc)
if (cc->rpages)
return 0;
- cc->rpages = page_array_alloc(cc->inode, cc->cluster_size);
+ cc->rpages = page_array_alloc(F2FS_I_SB(cc->inode), cc->cluster_size);
return cc->rpages ? 0 : -ENOMEM;
}
void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse)
{
- page_array_free(cc->inode, cc->rpages, cc->cluster_size);
+ page_array_free(F2FS_I_SB(cc->inode), cc->rpages, cc->cluster_size);
cc->rpages = NULL;
cc->nr_rpages = 0;
cc->nr_cpages = 0;
@@ -640,6 +638,7 @@ static void *f2fs_vmap(struct page **pages, unsigned int count)
static int f2fs_compress_pages(struct compress_ctx *cc)
{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct f2fs_inode_info *fi = F2FS_I(cc->inode);
const struct f2fs_compress_ops *cops =
f2fs_cops[fi->i_compress_algorithm];
@@ -660,7 +659,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE);
cc->valid_nr_cpages = cc->nr_cpages;
- cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages);
+ cc->cpages = page_array_alloc(sbi, cc->nr_cpages);
if (!cc->cpages) {
ret = -ENOMEM;
goto destroy_compress_ctx;
@@ -742,7 +741,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
if (cc->cpages[i])
f2fs_compress_free_page(cc->cpages[i]);
}
- page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ page_array_free(sbi, cc->cpages, cc->nr_cpages);
cc->cpages = NULL;
destroy_compress_ctx:
if (cops->destroy_compress_ctx)
@@ -1308,7 +1307,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
cic->magic = F2FS_COMPRESSED_PAGE_MAGIC;
cic->inode = inode;
atomic_set(&cic->pending_pages, cc->valid_nr_cpages);
- cic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
+ cic->rpages = page_array_alloc(sbi, cc->cluster_size);
if (!cic->rpages)
goto out_put_cic;
@@ -1401,13 +1400,13 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
spin_unlock(&fi->i_size_lock);
f2fs_put_rpages(cc);
- page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ page_array_free(sbi, cc->cpages, cc->nr_cpages);
cc->cpages = NULL;
f2fs_destroy_compress_ctx(cc, false);
return 0;
out_destroy_crypt:
- page_array_free(cc->inode, cic->rpages, cc->cluster_size);
+ page_array_free(sbi, cic->rpages, cc->cluster_size);
for (--i; i >= 0; i--)
fscrypt_finalize_bounce_page(&cc->cpages[i]);
@@ -1425,7 +1424,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
f2fs_compress_free_page(cc->cpages[i]);
cc->cpages[i] = NULL;
}
- page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ page_array_free(sbi, cc->cpages, cc->nr_cpages);
cc->cpages = NULL;
return -EAGAIN;
}
@@ -1455,7 +1454,7 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page)
end_page_writeback(cic->rpages[i]);
}
- page_array_free(cic->inode, cic->rpages, cic->nr_rpages);
+ page_array_free(sbi, cic->rpages, cic->nr_rpages);
kmem_cache_free(cic_entry_slab, cic);
}
@@ -1593,7 +1592,7 @@ static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic,
if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc))
return 0;
- dic->tpages = page_array_alloc(dic->inode, dic->cluster_size);
+ dic->tpages = page_array_alloc(F2FS_I_SB(dic->inode), dic->cluster_size);
if (!dic->tpages)
return -ENOMEM;
@@ -1655,7 +1654,7 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
if (!dic)
return ERR_PTR(-ENOMEM);
- dic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
+ dic->rpages = page_array_alloc(sbi, cc->cluster_size);
if (!dic->rpages) {
kmem_cache_free(dic_entry_slab, dic);
return ERR_PTR(-ENOMEM);
@@ -1676,7 +1675,7 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
dic->rpages[i] = cc->rpages[i];
dic->nr_rpages = cc->cluster_size;
- dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages);
+ dic->cpages = page_array_alloc(sbi, dic->nr_cpages);
if (!dic->cpages) {
ret = -ENOMEM;
goto out_free;
@@ -1711,6 +1710,7 @@ static void f2fs_free_dic(struct decompress_io_ctx *dic,
bool bypass_destroy_callback)
{
int i;
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode);
f2fs_release_decomp_mem(dic, bypass_destroy_callback, true);
@@ -1722,7 +1722,7 @@ static void f2fs_free_dic(struct decompress_io_ctx *dic,
continue;
f2fs_compress_free_page(dic->tpages[i]);
}
- page_array_free(dic->inode, dic->tpages, dic->cluster_size);
+ page_array_free(sbi, dic->tpages, dic->cluster_size);
}
if (dic->cpages) {
@@ -1731,10 +1731,10 @@ static void f2fs_free_dic(struct decompress_io_ctx *dic,
continue;
f2fs_compress_free_page(dic->cpages[i]);
}
- page_array_free(dic->inode, dic->cpages, dic->nr_cpages);
+ page_array_free(sbi, dic->cpages, dic->nr_cpages);
}
- page_array_free(dic->inode, dic->rpages, dic->nr_rpages);
+ page_array_free(sbi, dic->rpages, dic->nr_rpages);
kmem_cache_free(dic_entry_slab, dic);
}
--
2.43.0
next prev parent reply other threads:[~2026-05-12 7:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-12 7:50 [PATCH 6.1.y 0/2] f2fs: compress: fix UAF of f2fs_inode_info in f2fs_free_dic Bin Lan
2026-05-12 7:50 ` Bin Lan [this message]
2026-05-12 7:50 ` [PATCH 6.1.y 2/2] " Bin Lan
2026-05-12 14:45 ` [PATCH 6.1.y 0/2] " Sasha Levin
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