diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 5917099470ea..cff2aad31041 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -34,6 +34,7 @@ config ARC select OF select OF_EARLY_FLATTREE select PERF_USE_VMALLOC + select HAVE_DEBUG_STACKOVERFLOW config SCHED_OMIT_FRAME_POINTER def_bool y diff --git a/arch/arc/Kconfig.debug b/arch/arc/Kconfig.debug index 962c6099659e..a7fc0da25650 100644 --- a/arch/arc/Kconfig.debug +++ b/arch/arc/Kconfig.debug @@ -15,13 +15,6 @@ config EARLY_PRINTK with klogd/syslogd or the X server. You should normally N here, unless you want to debug such a crash. -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit. - config 16KSTACKS bool "Use 16Kb for kernel stacks instead of 8Kb" help diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index a117652b5fea..82707a77aa73 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -41,6 +41,7 @@ config BLACKFIN select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA + select HAVE_DEBUG_STACKOVERFLOW config GENERIC_CSUM def_bool y diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug index 79594694ee90..f3337ee03621 100644 --- a/arch/blackfin/Kconfig.debug +++ b/arch/blackfin/Kconfig.debug @@ -2,13 +2,6 @@ menu "Kernel hacking" source "lib/Kconfig.debug" -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit. - config DEBUG_VERBOSE bool "Verbose fault messages" default y diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig index 2ce731f9aa4d..4b6628ea381e 100644 --- a/arch/frv/Kconfig +++ b/arch/frv/Kconfig @@ -14,6 +14,7 @@ config FRV select ARCH_WANT_IPC_PARSE_VERSION select OLD_SIGSUSPEND3 select OLD_SIGACTION + select HAVE_DEBUG_STACKOVERFLOW config ZONE_DMA bool diff --git a/arch/frv/Kconfig.debug b/arch/frv/Kconfig.debug index 211f01bc4caa..98c99a3ed2be 100644 --- a/arch/frv/Kconfig.debug +++ b/arch/frv/Kconfig.debug @@ -2,10 +2,6 @@ menu "Kernel hacking" source "lib/Kconfig.debug" -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - config GDBSTUB bool "Remote GDB kernel debugging" depends on DEBUG_KERNEL diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index bcd17b206571..29a7ef4e448b 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -16,6 +16,7 @@ config M32R select GENERIC_ATOMIC64 select ARCH_USES_GETTIMEOFFSET select MODULES_USE_ELF_RELA + select HAVE_DEBUG_STACKOVERFLOW config SBUS bool diff --git a/arch/m32r/Kconfig.debug b/arch/m32r/Kconfig.debug index bb1afc1a31cc..6c612b7691b0 100644 --- a/arch/m32r/Kconfig.debug +++ b/arch/m32r/Kconfig.debug @@ -2,13 +2,6 @@ menu "Kernel hacking" source "lib/Kconfig.debug" -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit. - config DEBUG_PAGEALLOC bool "Debug page memory allocations" depends on DEBUG_KERNEL && BROKEN diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig index dcd94406030e..cfd831c29824 100644 --- a/arch/metag/Kconfig +++ b/arch/metag/Kconfig @@ -30,6 +30,7 @@ config METAG select OF select OF_EARLY_FLATTREE select SPARSE_IRQ + select HAVE_DEBUG_STACKOVERFLOW config STACKTRACE_SUPPORT def_bool y diff --git a/arch/metag/Kconfig.debug b/arch/metag/Kconfig.debug index e45bbf6a7a5d..cb5c92860540 100644 --- a/arch/metag/Kconfig.debug +++ b/arch/metag/Kconfig.debug @@ -6,13 +6,6 @@ config TRACE_IRQFLAGS_SUPPORT source "lib/Kconfig.debug" -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit. - config 4KSTACKS bool "Use 4Kb for kernel stacks instead of 8Kb" depends on DEBUG_KERNEL diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 7a58ab933b20..7aae1ef096ea 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -42,6 +42,7 @@ config MIPS select MODULES_USE_ELF_REL if MODULES select MODULES_USE_ELF_RELA if MODULES && 64BIT select CLONE_BACKWARDS + select HAVE_DEBUG_STACKOVERFLOW menu "Machine selection" diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug index 5a43aa0798ca..37871f0de15e 100644 --- a/arch/mips/Kconfig.debug +++ b/arch/mips/Kconfig.debug @@ -67,15 +67,6 @@ config CMDLINE_OVERRIDE Normally, you will choose 'N' here. -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit(2GB on MIPS). The debugging option - provides another way to check stack overflow happened on kernel mode - stack usually caused by nested interruption. - config SMTC_IDLE_HOOK_DEBUG bool "Enable additional debug checks before going into CPU idle loop" depends on DEBUG_KERNEL && MIPS_MT_SMTC diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig index 428da175d073..70e4f663ebd2 100644 --- a/arch/mn10300/Kconfig +++ b/arch/mn10300/Kconfig @@ -13,6 +13,7 @@ config MN10300 select MODULES_USE_ELF_RELA select OLD_SIGSUSPEND3 select OLD_SIGACTION + select HAVE_DEBUG_STACKOVERFLOW config AM33_2 def_bool n diff --git a/arch/mn10300/Kconfig.debug b/arch/mn10300/Kconfig.debug index bdbfd444a9ff..94efb3ed223f 100644 --- a/arch/mn10300/Kconfig.debug +++ b/arch/mn10300/Kconfig.debug @@ -2,10 +2,6 @@ menu "Kernel hacking" source "lib/Kconfig.debug" -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - config DEBUG_DECOMPRESS_KERNEL bool "Using serial port during decompressing kernel" depends on DEBUG_KERNEL diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index 1072bfd18c50..99dbab1c59ac 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -22,6 +22,7 @@ config OPENRISC select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select MODULES_USE_ELF_RELA + select HAVE_DEBUG_STACKOVERFLOW config MMU def_bool y @@ -128,16 +129,6 @@ config CMDLINE menu "Debugging options" -config DEBUG_STACKOVERFLOW - bool "Check for kernel stack overflow" - default y - help - Make extra checks for space available on stack in some - critical functions. This will cause kernel to run a bit slower, - but will catch most of kernel stack overruns and exit gracefully. - - Say Y if you are unsure. - config JUMP_UPON_UNHANDLED_EXCEPTION bool "Try to die gracefully" default y diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 6507dabdd5dd..ffcd557f8cfd 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -27,6 +27,7 @@ config PARISC select MODULES_USE_ELF_RELA select CLONE_BACKWARDS select TTY # Needed for pdc_cons.c + select HAVE_DEBUG_STACKOVERFLOW help The PA-RISC microprocessor is designed by Hewlett-Packard and used diff --git a/arch/parisc/Kconfig.debug b/arch/parisc/Kconfig.debug index 08a332f6ee87..bc989e522a04 100644 --- a/arch/parisc/Kconfig.debug +++ b/arch/parisc/Kconfig.debug @@ -13,14 +13,3 @@ config DEBUG_RODATA If in doubt, say "N". endmenu - -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - default y - depends on DEBUG_KERNEL - ---help--- - Say Y here if you want to check the overflows of kernel, IRQ - and exception stacks. This option will cause messages of the - stacks in detail when free stack space drops below a certain - limit. - If in doubt, say "N". diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index c33e3ad2c8fd..a4f5959ed9b0 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -138,6 +138,7 @@ config PPC select ARCH_USE_BUILTIN_BSWAP select OLD_SIGSUSPEND select OLD_SIGACTION if PPC32 + select HAVE_DEBUG_STACKOVERFLOW config EARLY_PRINTK bool diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug index 863d877e0b5f..a4914f373958 100644 --- a/arch/powerpc/Kconfig.debug +++ b/arch/powerpc/Kconfig.debug @@ -28,13 +28,6 @@ config PRINT_STACK_DEPTH too small and stack traces cause important information to scroll off the screen. -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit. - config HCALL_STATS bool "Hypervisor call instrumentation" depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 3aa37669ff8c..24565a7ffe6d 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -25,6 +25,7 @@ config TILE select HAVE_ARCH_TRACEHOOK select HAVE_SYSCALL_TRACEPOINTS select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE + select HAVE_DEBUG_STACKOVERFLOW # FIXME: investigate whether we need/want these options. # select HAVE_IOREMAP_PROT diff --git a/arch/tile/Kconfig.debug b/arch/tile/Kconfig.debug index ddbfc3322d7f..9165ea979e85 100644 --- a/arch/tile/Kconfig.debug +++ b/arch/tile/Kconfig.debug @@ -14,13 +14,6 @@ config EARLY_PRINTK with klogd/syslogd. You should normally N here, unless you want to debug such a crash. -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - help - This option will cause messages to be printed if free stack space - drops below a certain limit. - config DEBUG_EXTRA_FLAGS string "Additional compiler arguments when building with '-g'" depends on DEBUG_INFO diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index fe120da25625..22f30337a18e 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -121,6 +121,7 @@ config X86 select OLD_SIGACTION if X86_32 select COMPAT_OLD_SIGACTION if IA32_EMULATION select RTC_LIB + select HAVE_DEBUG_STACKOVERFLOW config INSTRUCTION_DECODER def_bool y diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index c198b7e13e7b..c1665a8989da 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -59,16 +59,6 @@ config EARLY_PRINTK_DBGP with klogd/syslogd or the X server. You should normally N here, unless you want to debug such a crash. You need usb debug device. -config DEBUG_STACKOVERFLOW - bool "Check for stack overflows" - depends on DEBUG_KERNEL - ---help--- - Say Y here if you want to check the overflows of kernel, IRQ - and exception stacks. This option will cause messages of the - stacks in detail when free stack space drops below a certain - limit. - If in doubt, say "N". - config X86_PTDUMP bool "Export kernel pagetable layout to userspace via debugfs" depends on DEBUG_KERNEL diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 566cf2bc08ea..cc443bc6edfc 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1475,6 +1475,27 @@ config ASYNC_RAID6_TEST If unsure, say N. +config HAVE_DEBUG_STACKOVERFLOW + bool + +config DEBUG_STACKOVERFLOW + bool "Check for stack overflows" + depends on DEBUG_KERNEL && HAVE_DEBUG_STACKOVERFLOW + ---help--- + Say Y here if you want to check for overflows of kernel, IRQ + and exception stacks (if your archicture uses them). This + option will show detailed messages if free stack space drops + below a certain limit. + + These kinds of bugs usually occur when call-chains in the + kernel get too deep, especially when interrupts are + involved. + + Use this in cases where you see apparently random memory + corruption, especially if it appears in 'struct thread_info' + + If in doubt, say "N". + source "samples/Kconfig" source "lib/Kconfig.kgdb"