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Change History

In the Linux kernel, the following vulnerability has been resolved:

null_blk: fix validation of block size

Block size should be between 512 and PAGE_SIZE and be a power of 2. The current
check does not validate this, so update the check.

Without this patch, null_blk would Oops due to a null pointer deref when
loaded with bs=1536 [1].


[axboe: remove unnecessary braces and != 0 check]

kernel.org https://git.kernel.org/stable/c/08f03186b96e25e3154916a2e70732557c770ea7 [No types assigned]

kernel.org https://git.kernel.org/stable/c/2772ed2fc075eef7df3789906fc9dae01e4e132e [No types assigned]

kernel.org https://git.kernel.org/stable/c/9625afe1dd4a158a14bb50f81af9e2dac634c0b1 [No types assigned]

kernel.org https://git.kernel.org/stable/c/9b873bdaae64bddade9d8c6df23c8a31948d47d0 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c462ecd659b5fce731f1d592285832fd6ad54053 [No types assigned]

kernel.org https://git.kernel.org/stable/c/f92409a9da02f27d05d713bff5f865e386cef9b3 [No types assigned]