[PATCH 4.20 264/352] scripts/decode_stacktrace: only strip base path when a prefix of the path

From: Greg Kroah-Hartman
Date: Mon Feb 11 2019 - 09:33:42 EST

4.20-stable review patch. If anyone has any objections, please let me know.


[ Upstream commit 67a28de47faa83585dd644bd4c31e5a1d9346c50 ]

Running something like:

decodecode vmlinux .

leads to interested results where not only the leading "." gets stripped
from the displayed paths, but also anywhere in the string, displaying
something like:

kvm_vcpu_check_block (arch/arm64/kvm/virt/kvm/kvm_mainc:2141)

which doesn't help further processing.

Fix it by only stripping the base path if it is a prefix of the path.

Link: http://lkml.kernel.org/r/20181210174659.31054-3-marc.zyngier@xxxxxxx
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
scripts/decode_stacktrace.sh | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 64220e36ce3b..98a7d63a723e 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -78,7 +78,7 @@ parse_symbol() {

# Strip out the base of the path
- code=${code//$basepath/""}
+ code=${code//^$basepath/""}

# In the case of inlines, move everything to same line
code=${code//$'\n'/' '}