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Diffstat (limited to 'Documentation/security/self-protection.rst')
| -rw-r--r-- | Documentation/security/self-protection.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/security/self-protection.rst b/Documentation/security/self-protection.rst index e1ca698e00063..f584fb74b4ff2 100644 --- a/Documentation/security/self-protection.rst +++ b/Documentation/security/self-protection.rst @@ -302,11 +302,11 @@ sure structure holes are cleared. Memory poisoning ---------------- -When releasing memory, it is best to poison the contents (clear stack on -syscall return, wipe heap memory on a free), to avoid reuse attacks that -rely on the old contents of memory. This frustrates many uninitialized -variable attacks, stack content exposures, heap content exposures, and -use-after-free attacks. +When releasing memory, it is best to poison the contents, to avoid reuse +attacks that rely on the old contents of memory. E.g., clear stack on a +syscall return (``CONFIG_GCC_PLUGIN_STACKLEAK``), wipe heap memory on a +free. This frustrates many uninitialized variable attacks, stack content +exposures, heap content exposures, and use-after-free attacks. Destination tracking -------------------- |