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f2fs: compress: change the first parameter of page_array_{alloc,free} to sbi

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[ Upstream commit 8e2a9b6564 ]

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>
Stable-dep-of: 39868685c2 ("f2fs: compress: fix UAF of f2fs_inode_info in f2fs_free_dic")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhiguo Niu 2025-06-13 09:50:44 +08:00 committed by Greg Kroah-Hartman
parent a547285c32
commit d5931976cd
1 changed files with 20 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
fs/f2fs/compress.c
View File

@ -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)
@ -149,13 +147,13 @@ 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;
@ -622,6 +620,7 @@ 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];
@ -642,7 +641,7 @@ 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;
@ -716,7 +715,7 @@ out_free_cpages:
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)
@ -1340,7 +1339,7 @@ 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;
@ -1442,13 +1441,13 @@ unlock_continue:
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--) {
if (!cc->cpages[i])
@ -1469,7 +1468,7 @@ out_free:
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;
}
@ -1499,7 +1498,7 @@ 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);
}
@ -1640,7 +1639,7 @@ 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;
@ -1700,7 +1699,7 @@ 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);
@ -1721,7 +1720,7 @@ 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;
@ -1751,6 +1750,7 @@ 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);
@ -1762,7 +1762,7 @@ 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) {
@ -1771,10 +1771,10 @@ 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);
}