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of: reserved_mem: avoid post-init UAF when alloc_reserved_mem_array() fails

In the Linux kernel, the following vulnerability has been resolved: of: reserved_mem: avoid post-init UAF when alloc_reserved_mem_array() fails The global pointer 'reserved_mem' continues to reference the reserved_mem_array which lives in __initdata if alloc_reserved_mem_array() fails. of_reserved_mem_lookup() is exported for post-init use, that would dereference freed memory and trigger a use-after-free. So reset reserved_mem_count to 0 when alloc_reserved_mem_array() fails.

Affected products

Linux
  • <e1686ca81dbf3edbde589b7daf312b45cbf76e03
  • <9af58d10d0d8c08b822de5fc99e61f31a87ede8d
  • =<*
  • <cbd3102fe27bc87da244bf4c3ba670ea4698b0a8
  • <6d28e6ad3c5c9248577f21057baa9bf16fa9ef3b
  • ==6.13
  • <6.13
  • =<6.18.*
  • =<7.1.*