In the Linux kernel, the following vulnerability has been resolved:
iommu/omap: Fix buffer overflow in debugfs
There are two issues here:
- The len variable needs to be checked before the very first write.
Otherwise if omap2_iommu_dump_ctx() with bytes less than 32 it is a
buffer overflow.
- The snprintf() function returns the number of bytes that would have
been copied if there were enough space. But we want to know the
number of bytes which were actually copied so use scnprintf()
instead.
References