um: clear all memory in new userspace processes

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With the change to use execve() we can now safely clear the memory up to
STUB_START as rseq will not be trying to use memory in that region. Also,
on 64 bit the previous changes should mean that there is no usable
memory range above the stub.

Make the change and remove the comment as it is not needed anymore.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20240919124511.282088-10-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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Benjamin Berg 2024-09-19 14:45:10 +02:00 • committed by Johannes Berg

parent 68b9883cc1

commit e167cc7a95

1 changed files with 2 additions and 23 deletions

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arch/um/kernel/skas/mmu.c

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