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fs/ntfs3: Use __GFP_NOWARN allocation at ntfs_fill_super()

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syzbot is reporting too large allocation at ntfs_fill_super() [1], for a
crafted filesystem can contain bogus inode->i_size. Add __GFP_NOWARN in
order to avoid too large allocation warning, than exhausting memory by
using kvmalloc().

Link: https://syzkaller.appspot.com/bug?extid=33f3faaa0c08744f7d40 [1]
Reported-by: syzot <syzbot+33f3faaa0c08744f7d40@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Tetsuo Handa 2022-10-02 23:54:11 +09:00 committed by Konstantin Komarov
parent 0d0f659bf7
commit 59bfd7a483
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GPG Key ID: A9B0331F832407B6
1 changed files with 1 additions and 1 deletions
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2
fs/ntfs3/super.c
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@ -1167,7 +1167,7 @@ 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);
sbi->def_table = t = kmalloc(bytes, GFP_NOFS | __GFP_NOWARN);
if (!t) {
err = -ENOMEM;
goto put_inode_out;