block: avoid possible overflow for chunk_sectors check in blk_stack_limits()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: block: avoid possible overflow for chunk_sectors check in blk_stack_limits() In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value. However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors.

References

• https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253
• https://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dc
• https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38
• https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9
• https://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159
• https://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2
• https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f
• https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8