uprobes: Use get_user() in is_trap_at_addr()

is_trap_at_addr() reads the instruction at a user address with
__get_user(), inside pagefault_disable() since the caller holds
mmap_lock.  There is no access_ok() in front of it, and nothing here
needs the unchecked version: with page faults disabled, get_user()'s
might_fault() check returns early, so that is no reason to avoid it
either.

Use get_user(), which also checks that the address is a user address,
and on x86 avoids the lfence that __get_user() does.

This is part of getting rid of __get_user() and __put_user() entirely.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions