diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2023-03-27 12:37:28 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-04-04 19:34:56 +0300 |
| commit | b94c0ebb1ec752016a3e41bfb66bb51ea905e533 (patch) | |
| tree | 5c94dfb2b30af6c4fb1d551e5adf347a4c21960b /arch/s390/Kconfig | |
| parent | 22ca1e7738025ae38d07c05bae2af934b1b2c11f (diff) | |
| download | linux-b94c0ebb1ec752016a3e41bfb66bb51ea905e533.tar.xz | |
s390: enable HAVE_ARCH_STACKLEAK
Add support for the stackleak feature. Whenever the kernel returns to user
space the kernel stack is filled with a poison value.
Enabling this feature is quite expensive: e.g. after instrumenting the
getpid() system call function to have a 4kb stack the result is an
increased runtime of the system call by a factor of 3.
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index d610f911677e..d4db47b0610c 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -155,6 +155,7 @@ config S390 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_SOFT_DIRTY + select HAVE_ARCH_STACKLEAK select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_VMAP_STACK |