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fs/ntfs3: Use kvmalloc instead of kmalloc(... __GFP_NOWARN) 

[ Upstream commit fc471e39e3 ]

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Konstantin Komarov 2023-06-30 16:12:58 +04:00 committed by Greg Kroah-Hartman
parent 92f9c7c7dd
commit 6fe32f79ab
3 changed files with 16 additions and 4 deletions
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15
fs/ntfs3/attrlist.c
View File

@ -52,7 +52,8 @@ int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr)
if (!attr->non_res) {
lsize = le32_to_cpu(attr->res.data_size);
le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN);
/* attr is resident: lsize < record_size (1K or 4K) */
le = kvmalloc(al_aligned(lsize), GFP_KERNEL);
if (!le) {
err = -ENOMEM;
goto out;
@ -80,7 +81,17 @@ int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr)
if (err < 0)
goto out;
le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN);
/* attr is nonresident.
* The worst case:
* 1T (2^40) extremely fragmented file.
* cluster = 4K (2^12) => 2^28 fragments
* 2^9 fragments per one record => 2^19 records
* 2^5 bytes of ATTR_LIST_ENTRY per one record => 2^24 bytes.
*
* the result is 16M bytes per attribute list.
* Use kvmalloc to allocate in range [several Kbytes - dozen Mbytes]
*/
le = kvmalloc(al_aligned(lsize), GFP_KERNEL);
if (!le) {
err = -ENOMEM;
goto out;

3
fs/ntfs3/bitmap.c
View File

@ -662,7 +662,8 @@ int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits)
wnd->bits_last = wbits;
wnd->free_bits =
kcalloc(wnd->nwnd, sizeof(u16), GFP_NOFS | __GFP_NOWARN);
kvmalloc_array(wnd->nwnd, sizeof(u16), GFP_KERNEL | __GFP_ZERO);
if (!wnd->free_bits)
return -ENOMEM;

2
fs/ntfs3/super.c
View File

@ -1141,7 +1141,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
goto put_inode_out;
}
bytes = inode->i_size;
sbi->def_table = t = kmalloc(bytes, GFP_NOFS | __GFP_NOWARN);
sbi->def_table = t = kvmalloc(bytes, GFP_KERNEL);
if (!t) {
err = -ENOMEM;
goto put_inode_out;