Merge remote-tracking branch 'ovl/misc' into work.misc

[cascardo/linux.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index f07842e..cab7405 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -709,6 +709,8 @@ config KCOV
        bool "Code coverage for fuzzing"
        depends on ARCH_HAS_KCOV
        select DEBUG_FS
+       select GCC_PLUGINS if !COMPILE_TEST
+       select GCC_PLUGIN_SANCOV if !COMPILE_TEST
        help
          KCOV exposes kernel code coverage information in a form suitable
          for coverage-guided fuzzing (randomized testing).
@@ -719,6 +721,17 @@ config KCOV
 
          For more details, see Documentation/kcov.txt.
 
+config KCOV_INSTRUMENT_ALL
+       bool "Instrument all code by default"
+       depends on KCOV
+       default y if KCOV
+       help
+         If you are doing generic system call fuzzing (like e.g. syzkaller),
+         then you will want to instrument the whole kernel and you should
+         say y here. If you are doing more targeted fuzzing (like e.g.
+         filesystem fuzzing with AFL) then you will want to enable coverage
+         for more specific subsets of files, and should say n here.
+
 config DEBUG_SHIRQ
        bool "Debug shared IRQ handlers"
        depends on DEBUG_KERNEL
@@ -808,7 +821,7 @@ config DETECT_HUNG_TASK
        help
          Say Y here to enable the kernel to detect "hung tasks",
          which are bugs that cause the task to be stuck in
-         uninterruptible "D" state indefinitiley.
+         uninterruptible "D" state indefinitely.
 
          When a hung task is detected, the kernel will print the
          current stack trace (which you should report), but the
@@ -1673,24 +1686,6 @@ config LATENCYTOP
          Enable this option if you want to use the LatencyTOP tool
          to find out which userspace is blocking on what kernel operations.
 
-config ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
-       bool
-
-config DEBUG_STRICT_USER_COPY_CHECKS
-       bool "Strict user copy size checks"
-       depends on ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
-       depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
-       help
-         Enabling this option turns a certain set of sanity checks for user
-         copy operations into compile time failures.
-
-         The copy_from_user() etc checks are there to help test if there
-         are sufficient security checks on the length argument of
-         the copy operation, by having gcc prove that the argument is
-         within bounds.
-
-         If unsure, say N.
-
 source kernel/trace/Kconfig
 
 menu "Runtime Testing"