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Diffstat (limited to 'Documentation/dev-tools/kasan.rst')
| -rw-r--r-- | Documentation/dev-tools/kasan.rst | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index 3020ee3d7a63..37af493c7f8e 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -174,10 +174,16 @@ call_rcu() and workqueue queuing. Boot parameters ~~~~~~~~~~~~~~~ +KASAN is affected by the generic ``panic_on_warn`` command line parameter. +When it is enabled, KASAN panics the kernel after printing a bug report. + +By default, KASAN prints a bug report only for the first invalid memory access. +With ``kasan_multi_shot``, KASAN prints a report on every invalid access. This +effectively disables ``panic_on_warn`` for KASAN reports. + Hardware tag-based KASAN mode (see the section about various modes below) is intended for use in production as a security mitigation. Therefore, it supports -boot parameters that allow to disable KASAN competely or otherwise control -particular KASAN features. +boot parameters that allow disabling KASAN or controlling its features. - ``kasan=off`` or ``=on`` controls whether KASAN is enabled (default: ``on``). @@ -194,8 +200,8 @@ particular KASAN features. traces collection (default: ``on``). - ``kasan.fault=report`` or ``=panic`` controls whether to only print a KASAN - report or also panic the kernel (default: ``report``). Note, that tag - checking gets disabled after the first reported bug. + report or also panic the kernel (default: ``report``). The panic happens even + if ``kasan_multi_shot`` is enabled. Implementation details ---------------------- |