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Tobias Gaertner 984a415f01

ntfs3: fix integer overflow in run_unpack() volume boundary check ...

The volume boundary check `lcn + len > sbi->used.bitmap.nbits` uses raw
addition which can wrap around for large lcn and len values, bypassing
the validation.  Use check_add_overflow() as is already done for the
adjacent prev_lcn + dlcn and vcn64 + len checks added by commit
3ac37e1003 ("ntfs3: Fix integer overflow in run_unpack()").

Found by fuzzing with a source-patched harness (LibAFL + QEMU).

Fixes: 82cae269cf ("fs/ntfs3: Add initialization of super block")
Cc: stable@vger.kernel.org
Signed-off-by: Tobias Gaertner <tob.gaertner@me.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

2026-04-07 18:43:39 +02:00

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