The patch titled
Subject: ntfs: add sanity check on allocation size
has been added to the -mm tree. Its filename is
ntfs-add-sanity-check-on-allocation-size.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/ntfs-add-sanity-check-on-allocation-size.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/ntfs-add-sanity-check-on-allocation-size.patch
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------------------------------------------------------
From: Dongliang Mu <mudongliangabcd@xxxxxxxxx>
Subject: ntfs: add sanity check on allocation size
ntfs_read_inode_mount invokes ntfs_malloc_nofs with zero allocation size.
It triggers one BUG in the __ntfs_malloc function.
Fix this by adding sanity check on ni->attr_list_size.
Link: https://lkml.kernel.org/r/20220120094914.47736-1-dzm91@xxxxxxxxxxx
Reported-by: syzbot+3c765c5248797356edaa@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dongliang Mu <mudongliangabcd@xxxxxxxxx>
Acked-by: Anton Altaparmakov <anton@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ntfs/inode.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/ntfs/inode.c~ntfs-add-sanity-check-on-allocation-size
+++ a/fs/ntfs/inode.c
@@ -1881,6 +1881,10 @@ int ntfs_read_inode_mount(struct inode *
}
/* Now allocate memory for the attribute list. */
ni->attr_list_size = (u32)ntfs_attr_size(a);
+ if (!ni->attr_list_size) {
+ ntfs_error(sb, "Attr_list_size is zero");
+ goto put_err_out;
+ }
ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
if (!ni->attr_list) {
ntfs_error(sb, "Not enough memory to allocate buffer "
_
Patches currently in -mm which might be from mudongliangabcd@xxxxxxxxx are
ntfs-add-sanity-check-on-allocation-size.patch
