kernel · 78a320542e6cdb2800cd736b2d136e4261d34f43 · Kirill Smelkov / linux

uprobes: Change valid_vma() to demand VM_MAYEXEC rather than VM_EXEC

Oleg Nesterov authored 12 years ago


uprobe_register() or uprobe_mmap() requires VM_READ | VM_EXEC, this
is not right. An apllication can do mprotect(PROT_EXEC) later and
execute this code.

Change valid_vma(is_register => true) to check VM_MAYEXEC instead.
No need to check VM_MAYREAD, it is always set.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>

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