In the Linux kernel, the following vulnerability has been resolved: drm/msm: Avoid NULL dereference in msmdispstateprintregs() If the allocation in msmdispstatedumpregs() failed then block->state
can be NULL. The msmdispstateprintregs() function does have code to try to handle it with: if (*reg) dumpaddr = *reg; ...but since "dumpaddr" is initialized to NULL the above is actually a noop. The code then goes on to dereference dump_addr
. Make the function print "Registers not stored" when it sees a NULL to solve this. Since we're touching the code, fix msmdispstateprintregs() not to pointlessly take a double-pointer and properly mark the pointer as const
. Patchwork: https://patchwork.freedesktop.org/patch/619657/