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fs/ntfs3: Use __GFP_NOWARN allocation at wnd_init()

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syzbot is reporting too large allocation at wnd_init() [1], for a crafted
filesystem can become wnd->nwnd close to UINT_MAX. Add __GFP_NOWARN in
order to avoid too large allocation warning, than exhausting memory by
using kvcalloc().

Link: https://syzkaller.appspot.com/bug?extid=fa4648a5446460b7b963 [1]
Reported-by: syzot <syzbot+fa4648a5446460b7b963@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 23:39:15 +09:00 committed by Konstantin Komarov
parent 557d19675a
commit 0d0f659bf7
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GPG Key ID: A9B0331F832407B6
1 changed files with 1 additions and 1 deletions
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2
fs/ntfs3/bitmap.c
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@ -661,7 +661,7 @@ int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits)
if (!wnd->bits_last)
wnd->bits_last = wbits;
wnd->free_bits = kcalloc(wnd->nwnd, sizeof(u16), GFP_NOFS);
wnd->free_bits = kcalloc(wnd->nwnd, sizeof(u16), GFP_NOFS | __GFP_NOWARN);
if (!wnd->free_bits)
return -ENOMEM;