mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 22:37:45 -04:00
Andrey Konovalov
78063a9dd9
This patch is a part of a series that extends kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. tee_shm_register()->optee_shm_unregister()->check_mem_type() uses provided user pointers for vma lookups (via __check_mem_type()), which can only by done with untagged pointers. Untag user pointers in this function. Link: http://lkml.kernel.org/r/4b993f33196b3566ac81285ff8453219e2079b45.1563904656.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Reviewed-by: Kees Cook <[email protected]> Acked-by: Jens Wiklander <[email protected]> Cc: Al Viro <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Eric Auger <[email protected]> Cc: Felix Kuehling <[email protected]> Cc: Khalid Aziz <[email protected]> Cc: Mauro Carvalho Chehab <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Vincenzo Frascino <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>