diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2022-10-02 16:39:15 +0200 |
|---|---|---|
| committer | Konstantin Komarov <almaz.alexandrovich@paragon-software.com> | 2022-11-12 18:59:41 +0100 |
| commit | 0d0f659bf713662fabed973f9996b8f23c59ca51 (patch) | |
| tree | b3b161ea5e7d81e8c26fed11c127712299cf37b5 /fs/ntfs3/bitmap.c | |
| parent | fs/ntfs3: Fix slab-out-of-bounds read in ntfs_trim_fs (diff) | |
| download | linux-0d0f659bf713662fabed973f9996b8f23c59ca51.tar.xz linux-0d0f659bf713662fabed973f9996b8f23c59ca51.zip | |
fs/ntfs3: Use __GFP_NOWARN allocation at wnd_init()
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>
Diffstat (limited to '')
| -rw-r--r-- | fs/ntfs3/bitmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c index 629c1ee97268..badaaaf302dd 100644 --- a/fs/ntfs3/bitmap.c +++ b/fs/ntfs3/bitmap.c @@ -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; |