kernel/linux.git/scripts, branch v3.16.61

kconfig: Avoid format overflow warning from GCC 8.1

2018-11-20T18:05:09+00:00

commit 2ae89c7a82ea9d81a19b4fc2df23bef4b112f24e upstream. In file included from scripts/kconfig/zconf.tab.c:2485: scripts/kconfig/confdata.c: In function ‘conf_write’: scripts/kconfig/confdata.c:773:22: warning: ‘%s’ directive writing likely 7 or more bytes into a region of size between 1 and 4097 [-Wformat-overflow=] sprintf(newname, "%s%s", dirname, basename); ^~ scripts/kconfig/confdata.c:773:19: note: assuming directive output of 7 bytes sprintf(newname, "%s%s", dirname, basename); ^~~~~~ scripts/kconfig/confdata.c:773:2: note: ‘sprintf’ output 1 or more bytes (assuming 4104) into a destination of size 4097 sprintf(newname, "%s%s", dirname, basename); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ scripts/kconfig/confdata.c:776:23: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=] sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid()); ^~~~~~~~~~~ scripts/kconfig/confdata.c:776:3: note: ‘sprintf’ output between 13 and 4119 bytes into a destination of size 4097 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid()); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Increase the size of tmpname and newname to make GCC happy. Signed-off-by: Nathan Chancellor Signed-off-by: Masahiro Yamada Signed-off-by: Ben Hutchings

rpmsg: Correct support for MODULE_DEVICE_TABLE()

2018-11-20T18:04:55+00:00

commit 5b7d127726de6eed4b900bc3bbb167837690818f upstream. Due to missing a missing entry in file2alias.c MODULE_DEVICE_TABLE() are not generating the proper module aliases. Add the needed entry here. Fixes: bcabbccabffe ("rpmsg: add virtio-based remote processor messaging bus") Reported-by: Suman Anna Signed-off-by: Andrew F. Davis Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings

module/retpoline: Warn about missing retpoline in module

2018-03-19T18:59:11+00:00

commit caf7501a1b4ec964190f31f9c3f163de252273b8 upstream. There's a risk that a kernel which has full retpoline mitigations becomes vulnerable when a module gets loaded that hasn't been compiled with the right compiler or the right option. To enable detection of that mismatch at module load time, add a module info string "retpoline" at build time when the module was compiled with retpoline support. This only covers compiled C source, but assembler source or prebuilt object files are not checked. If a retpoline enabled kernel detects a non retpoline protected module at load time, print a warning and report it in the sysfs vulnerability file. [ tglx: Massaged changelog ] Signed-off-by: Andi Kleen Signed-off-by: Thomas Gleixner Cc: David Woodhouse Cc: gregkh@linuxfoundation.org Cc: torvalds@linux-foundation.org Cc: jeyu@kernel.org Cc: arjan@linux.intel.com Link: https://lkml.kernel.org/r/20180125235028.31211-1-andi@firstfloor.org Signed-off-by: Ben Hutchings

modpost: don't emit section mismatch warnings for compiler optimizations

2017-11-11T13:33:42+00:00

commit 4a3893d069b788f3570c19c12d9e986e8e15870f upstream. Currently an allyesconfig build [gcc-4.9.1] can generate the following: WARNING: vmlinux.o(.text.unlikely+0x3864): Section mismatch in reference from the function cpumask_empty.constprop.3() to the variable .init.data:nmi_ipi_mask which comes from the cpumask_empty usage in arch/x86/kernel/nmi_selftest.c. Normally we would not see a symbol entry for cpumask_empty since it is: static inline bool cpumask_empty(const struct cpumask *srcp) however in this case, the variant of the symbol gets emitted when GCC does constant propagation optimization. Fix things up so that any locally optimized constprop variants don't warn when accessing variables that live in the __init sections. [arnd: adapted text_sections definition to 3.18] Signed-off-by: Paul Gortmaker Signed-off-by: Rusty Russell Signed-off-by: Arnd Bergmann Signed-off-by: Ben Hutchings

modpost: expand pattern matching to support substring matches

2017-11-11T13:33:42+00:00

commit 09c20c032b0f753969ae778d9783d946f054d7fe upstream. Currently the match() function supports a leading * to match any prefix and a trailing * to match any suffix. However there currently is not a combination of both that can be used to target matches of whole families of functions that share a common substring. Here we expand the *foo and foo* match to also support *foo* with the goal of targeting compiler generated symbol names that contain strings like ".constprop." and ".isra." Signed-off-by: Paul Gortmaker Signed-off-by: Rusty Russell Signed-off-by: Arnd Bergmann Signed-off-by: Ben Hutchings

sched: add macros to define bitops for task atomic flags

2017-10-12T14:28:22+00:00

commit e0e5070b20e01f0321f97db4e4e174f3f6b49e50 upstream. This will simplify code when we add new flags. v3: - Kees pointed out that no_new_privs should never be cleared, so we shouldn't define task_clear_no_new_privs(). we define 3 macros instead of a single one. v2: - updated scripts/tags.sh, suggested by Peter Cc: Ingo Molnar Cc: Miao Xie Cc: Tetsuo Handa Acked-by: Peter Zijlstra (Intel) Acked-by: Kees Cook Signed-off-by: Zefan Li Signed-off-by: Tejun Heo Signed-off-by: Ben Hutchings

tags: honor COMPILED_SOURCE with apart output directory

2017-09-15T17:29:57+00:00

commit cbf52a3e6a8a92beec6e0c70abf4111cd8f8faf7 upstream. When the kernel is compiled with an "O=" argument, the object files are not in the source tree, but in the build tree. This patch fixes O= build by looking for object files in the build tree. Fixes: 923e02ecf3f8 ("scripts/tags.sh: Support compiled source") Signed-off-by: Robert Jarzmik Signed-off-by: Masahiro Yamada Signed-off-by: Ben Hutchings

kconfig/nconf: Fix hang when editing symbol with a long prompt

2017-03-16T02:26:33+00:00

commit 79e51b5c2deea542b3bb8c66e0d502230b017dde upstream. Currently it is impossible to edit the value of a config symbol with a prompt longer than (terminal width - 2) characters. dialog_inputbox() calculates a negative x-offset for the input window and newwin() fails as this is invalid. It also doesn't check for this failure, so it busy-loops calling wgetch(NULL) which immediately returns -1. The additions in the offset calculations also don't match the intended size of the window. Limit the window size and calculate the offset similarly to show_scroll_win(). Fixes: 692d97c380c6 ("kconfig: new configuration interface (nconfig)") Signed-off-by: Ben Hutchings Signed-off-by: Ben Hutchings

scripts/has-stack-protector: add -fno-PIE

2017-02-23T03:54:31+00:00

commit 82031ea29e454b574bc6f49a33683a693ca5d907 upstream. Adding -no-PIE to the fstack protector check. -no-PIE was introduced before -fstack-protector so there is no need for a runtime check. Without it the build stops: |Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong available but compiler is broken due to -mcmodel=kernel + -fPIE if -fPIE is enabled by default. Tagging it stable so it is possible to compile recent stable kernels as well. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Michal Marek Signed-off-by: Ben Hutchings

ftrace/recordmcount: Work around for addition of metag magic but not relocations

2016-11-20T01:17:03+00:00

commit b2e1c26f0b62531636509fbcb6dab65617ed8331 upstream. glibc recently did a sync up (94e73c95d9b5 "elf.h: Sync with the gabi webpage") that added a #define for EM_METAG but did not add relocations This triggers build errors: scripts/recordmcount.c: In function 'do_file': scripts/recordmcount.c:466:28: error: 'R_METAG_ADDR32' undeclared (first use in this function) case EM_METAG: reltype = R_METAG_ADDR32; ^~~~~~~~~~~~~~ scripts/recordmcount.c:466:28: note: each undeclared identifier is reported only once for each function it appears in scripts/recordmcount.c:468:20: error: 'R_METAG_NONE' undeclared (first use in this function) rel_type_nop = R_METAG_NONE; ^~~~~~~~~~~~ Work around this change with some more #ifdefery for the relocations. Fedora Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1354034 Link: http://lkml.kernel.org/r/1468005530-14757-1-git-send-email-labbott@redhat.com Cc: James Hogan Fixes: 00512bdd4573 ("metag: ftrace support") Reported-by: Ross Burton Signed-off-by: Laura Abbott Signed-off-by: Steven Rostedt Signed-off-by: Ben Hutchings