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docs: add limitation of system calls that call copy_to_user()

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Change-Id: If449c73f8d5949ab5526ea598b0f713ed4431157
Refs: #1514
This commit is contained in:
Ken Sato
2021-02-03 08:37:21 +09:00
committed by Masamichi Takagi
parent 48b1d548f2
commit 866f5c51a0
1 changed files with 6 additions and 0 deletions
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docs/users.rst
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@@ -214,3 +214,9 @@ Limitations
:: ::
sudo systemctl restart xos_hwb sudo systemctl restart xos_hwb
31. System calls can write the mcexec VMAs with PROT_WRITE flag not
set. This is because we never turn off PROT_WRITE of the mcexec
VMAs to circumvent the issue "set_host_vma(): do NOT read protect
Linux VMA".