From 7ae4ba7195b1bac04a4210a499da9d8c63b0ba9c Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Google)" Date: Mon, 23 Jan 2023 11:22:52 -0500 Subject: ftrace/scripts: Update the instructions for ftrace-bisect.sh The instructions for the ftrace-bisect.sh script, which is used to find what function is being traced that is causing a kernel crash, and possibly a triple fault reboot, uses the old method. In 5.1, a new feature was added that let the user write in the index into available_filter_functions that maps to the function a user wants to set in set_ftrace_filter (or set_ftrace_notrace). This takes O(1) to set, as suppose to writing a function name, which takes O(n) (where n is the number of functions in available_filter_functions). The ftrace-bisect.sh requires setting half of the functions in available_filter_functions, which is O(n^2) using the name method to enable and can take several minutes to complete. The number method is O(n) which takes less than a second to complete. Using the number method for any kernel 5.1 and after is the proper way to do the bisect. Update the usage to reflect the new change, as well as using the /sys/kernel/tracing path instead of the obsolete debugfs path. Link: https://lkml.kernel.org/r/20230123112252.022003dd@gandalf.local.home Cc: stable@vger.kernel.org Cc: Masami Hiramatsu Acked-by: Mark Rutland Fixes: f79b3f338564e ("ftrace: Allow enabling of filters via index of available_filter_functions") Signed-off-by: Steven Rostedt (Google) --- scripts/tracing/ftrace-bisect.sh | 34 ++++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) (limited to 'scripts') diff --git a/scripts/tracing/ftrace-bisect.sh b/scripts/tracing/ftrace-bisect.sh index 926701162bc8..bb4f59262bbe 100755 --- a/scripts/tracing/ftrace-bisect.sh +++ b/scripts/tracing/ftrace-bisect.sh @@ -12,7 +12,7 @@ # (note, if this is a problem with function_graph tracing, then simply # replace "function" with "function_graph" in the following steps). # -# # cd /sys/kernel/debug/tracing +# # cd /sys/kernel/tracing # # echo schedule > set_ftrace_filter # # echo function > current_tracer # @@ -20,22 +20,40 @@ # # # echo nop > current_tracer # -# # cat available_filter_functions > ~/full-file +# Starting with v5.1 this can be done with numbers, making it much faster: +# +# The old (slow) way, for kernels before v5.1. +# +# [old-way] # cat available_filter_functions > ~/full-file +# +# [old-way] *** Note *** this process will take several minutes to update the +# [old-way] filters. Setting multiple functions is an O(n^2) operation, and we +# [old-way] are dealing with thousands of functions. So go have coffee, talk +# [old-way] with your coworkers, read facebook. And eventually, this operation +# [old-way] will end. +# +# The new way (using numbers) is an O(n) operation, and usually takes less than a second. +# +# seq `wc -l available_filter_functions | cut -d' ' -f1` > ~/full-file +# +# This will create a sequence of numbers that match the functions in +# available_filter_functions, and when echoing in a number into the +# set_ftrace_filter file, it will enable the corresponding function in +# O(1) time. Making enabling all functions O(n) where n is the number of +# functions to enable. +# +# For either the new or old way, the rest of the operations remain the same. +# # # ftrace-bisect ~/full-file ~/test-file ~/non-test-file # # cat ~/test-file > set_ftrace_filter # -# *** Note *** this will take several minutes. Setting multiple functions is -# an O(n^2) operation, and we are dealing with thousands of functions. So go -# have coffee, talk with your coworkers, read facebook. And eventually, this -# operation will end. -# # # echo function > current_tracer # # If it crashes, we know that ~/test-file has a bad function. # # Reboot back to test kernel. # -# # cd /sys/kernel/debug/tracing +# # cd /sys/kernel/tracing # # mv ~/test-file ~/full-file # # If it didn't crash. -- cgit v1.2.3 From e6a71160cc145e18ab45195abf89884112e02dfb Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 18 Jan 2023 12:21:35 -0800 Subject: gcc-plugins: Reorganize gimple includes for GCC 13 The gimple-iterator.h header must be included before gimple-fold.h starting with GCC 13. Reorganize gimple headers to work for all GCC versions. Reported-by: Palmer Dabbelt Acked-by: Palmer Dabbelt Link: https://lore.kernel.org/all/20230113173033.4380-1-palmer@rivosinc.com/ Cc: linux-hardening@vger.kernel.org Signed-off-by: Kees Cook --- scripts/gcc-plugins/gcc-common.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'scripts') diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h index 9a1895747b15..84c730da36dd 100644 --- a/scripts/gcc-plugins/gcc-common.h +++ b/scripts/gcc-plugins/gcc-common.h @@ -71,7 +71,9 @@ #include "varasm.h" #include "stor-layout.h" #include "internal-fn.h" +#include "gimple.h" #include "gimple-expr.h" +#include "gimple-iterator.h" #include "gimple-fold.h" #include "context.h" #include "tree-ssa-alias.h" @@ -85,10 +87,8 @@ #include "tree-eh.h" #include "stmt.h" #include "gimplify.h" -#include "gimple.h" #include "tree-phinodes.h" #include "tree-cfg.h" -#include "gimple-iterator.h" #include "gimple-ssa.h" #include "ssa-iterators.h" -- cgit v1.2.3 From c96618275234ad03d44eafe9f8844305bb44fda4 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 28 Jan 2023 11:17:57 -0800 Subject: Fix up more non-executable files marked executable Joe found another DT file that shouldn't be executable, and that frustrated me enough that I went hunting with this script: git ls-files -s | grep '^100755' | cut -f2 | xargs grep -L '^#!' and that found another file that shouldn't have been marked executable either, despite being in the scripts directory. Maybe these two are the last ones at least for now. But I'm sure we'll be back in a few years, fixing things up again. Fixes: 8c6789f4e2d4 ("ASoC: dt-bindings: Add Everest ES8326 audio CODEC") Fixes: 4d8e5cd233db ("locking/atomics: Fix scripts/atomic/ script permissions") Reported-by: Joe Perches Signed-off-by: Linus Torvalds --- Documentation/devicetree/bindings/sound/everest,es8326.yaml | 0 scripts/atomic/atomics.tbl | 0 2 files changed, 0 insertions(+), 0 deletions(-) mode change 100755 => 100644 Documentation/devicetree/bindings/sound/everest,es8326.yaml mode change 100755 => 100644 scripts/atomic/atomics.tbl (limited to 'scripts') diff --git a/Documentation/devicetree/bindings/sound/everest,es8326.yaml b/Documentation/devicetree/bindings/sound/everest,es8326.yaml old mode 100755 new mode 100644 diff --git a/scripts/atomic/atomics.tbl b/scripts/atomic/atomics.tbl old mode 100755 new mode 100644 -- cgit v1.2.3 From 22e46f6480e83bcf49b6d5e6b66c81872c97a902 Mon Sep 17 00:00:00 2001 From: Jan Luebbe Date: Tue, 31 Jan 2023 09:43:23 +0100 Subject: kbuild: modinst: Fix build error when CONFIG_MODULE_SIG_KEY is a PKCS#11 URI When CONFIG_MODULE_SIG_KEY is PKCS#11 URI (pkcs11:*), signing of modules fails: scripts/sign-file sha256 /.../linux/pkcs11:token=foo;object=bar;pin-value=1111 certs/signing_key.x509 /.../kernel/crypto/tcrypt.ko Usage: scripts/sign-file [-dp] [] scripts/sign-file -s [] First, we need to avoid adding the $(srctree)/ prefix to the URL. Second, since the kconfig string values no longer include quotes, we need to add them again when passing a PKCS#11 URI to sign-file. This avoids splitting by the shell if the URI contains semicolons. Fixes: 4db9c2e3d055 ("kbuild: stop using config_filename in scripts/Makefile.modsign") Fixes: 129ab0d2d9f3 ("kbuild: do not quote string values in include/config/auto.conf") Signed-off-by: Jan Luebbe Signed-off-by: Masahiro Yamada --- scripts/Makefile.modinst | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'scripts') diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst index 836391e5d209..4815a8e32227 100644 --- a/scripts/Makefile.modinst +++ b/scripts/Makefile.modinst @@ -66,9 +66,13 @@ endif # Don't stop modules_install even if we can't sign external modules. # ifeq ($(CONFIG_MODULE_SIG_ALL),y) +ifeq ($(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY)),) sig-key := $(if $(wildcard $(CONFIG_MODULE_SIG_KEY)),,$(srctree)/)$(CONFIG_MODULE_SIG_KEY) +else +sig-key := $(CONFIG_MODULE_SIG_KEY) +endif quiet_cmd_sign = SIGN $@ - cmd_sign = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(sig-key) certs/signing_key.x509 $@ \ + cmd_sign = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) "$(sig-key)" certs/signing_key.x509 $@ \ $(if $(KBUILD_EXTMOD),|| true) else quiet_cmd_sign := -- cgit v1.2.3