syzbot is reporting too large allocation at ntfs_load_attr_list(), for a crafted filesystem can have huge data_size. Reported-by: syzbot <syzbot+89dbb3a789a5b9711793@xxxxxxxxxxxxxxxxxxxxxxxxx> Link: https://syzkaller.appspot.com/bug?extid=89dbb3a789a5b9711793 Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> --- Michal Hocko does not like blind __GFP_NOWARN usage. But since it seems that nobody can answer the max size to accept, reposting as-is. https://lkml.kernel.org/r/518d5b42-be63-28ad-f28e-0f1d5d992230@xxxxxxxxxxxxxxxxxxx fs/ntfs3/attrlist.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/ntfs3/attrlist.c b/fs/ntfs3/attrlist.c index c0c6bcbc8c05..81c22df27c72 100644 --- a/fs/ntfs3/attrlist.c +++ b/fs/ntfs3/attrlist.c @@ -52,7 +52,7 @@ 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); + le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN); if (!le) { err = -ENOMEM; goto out; @@ -80,7 +80,7 @@ int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr) if (err < 0) goto out; - le = kmalloc(al_aligned(lsize), GFP_NOFS); + le = kmalloc(al_aligned(lsize), GFP_NOFS | __GFP_NOWARN); if (!le) { err = -ENOMEM; goto out; -- 2.18.4
