Artem Savkov 5ce4164fff objtool: Fix segfault in .cold detection with -ffunction-sections ... [ Upstream commit 22566c1603 ] Because find_symbol_by_name() traverses the same lists as read_symbols(), changing sym->name in place without copying it affects the result of find_symbol_by_name(). In the case where a ".cold" function precedes its parent in sec->symbol_list, it can result in a function being considered a parent of itself. This leads to function length being set to 0 and other consequent side-effects including a segfault in add_switch_table(). The effects of this bug are only visible when building with -ffunction-sections in KCFLAGS. Fix by copying the search string instead of modifying it in place. Signed-off-by: Artem Savkov <asavkov@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 13810435b9 ("objtool: Support GCC 8's cold subfunctions") Link: http://lkml.kernel.org/r/910abd6b5a4945130fd44f787c24e07b9e07c8da.1542736240.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2018-12-17 09:28:50 +01:00
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accounting	…
arch	tools headers: Synchronise x86 cpufeatures.h for L1TF additions	2018-08-15 18:13:01 +02:00
build	tools: build: Use HOSTLDFLAGS with fixdep	2018-08-24 13:09:17 +02:00
cgroup	…
firewire	…
gpio	…
hv	tools: hv: fcopy: set 'error' in case an unknown operation was requested	2018-10-10 08:54:28 +02:00
iio	…
include	tools: sync up .h files with the repective arch and uapi .h files	2018-05-30 12:19:59 +02:00
kvm/kvm_stat	tools/kvm_stat: fix handling of invalid paths in debugfs provider	2018-10-10 08:54:20 +02:00
laptop	…
leds	…
lib	…
net	bpf: fix uninitialized variable in bpf tools	2018-06-21 04:02:49 +09:00
nfsd	…
objtool	objtool: Fix segfault in .cold detection with -ffunction-sections	2018-12-17 09:28:50 +01:00
pci	…
pcmcia	…
perf	perf tools: Restore proper cwd on return from mnt namespace	2018-12-17 09:28:49 +01:00
power	tools/power/cpupower: fix compilation with STATIC=true	2018-12-01 09:42:50 +01:00
scripts	Kbuild: fix # escaping in .cmd files for future Make	2018-07-11 16:29:21 +02:00
spi	…
testing	selftests: add script to stress-test nft packet path vs. control plane	2018-12-17 09:28:48 +01:00
thermal/tmon	tools/thermal: tmon: fix for segfault	2018-05-30 07:52:28 +02:00
time	…
usb	tools: usb: ffs-test: Fix build on big endian systems	2018-09-05 09:26:26 +02:00
virtio	…
vm	tools/vm/page-types.c: fix "defined but not used" warning	2018-10-10 08:54:22 +02:00
Makefile	…