From 436efd9e4b657b8b659c7f482f7106e521b09891 Mon Sep 17 00:00:00 2001
From: Bjorn Andersson <quic_bjorande@quicinc.com>
Date: Mon, 25 Dec 2023 09:40:35 -0800
Subject: [PATCH] scripts/decode_stacktrace.sh: strip unexpected CR from lines
When the kernel log is acquired over a serial cable it is not uncommon for
the log to contain carriage return characters, in addition to the expected
line feeds.
When this output is feed into decode_stacktrace.sh, handle_line() fails to
strip the trailing ']' off the module name, which results in find_module()
not being able to find the referred to kernel module. This is reported to
the user as:
WARNING! Modules path isn't set, but is needed to parse this symbol
The solution is to reconfigure the serial port, or to strip the carriage
returns from the log, but this isn't obvious from the error reported by
the script.
Instead, make decode_stacktrace.sh more user friendly by stripping the
trailing carriage return.
Link: https://lkml.kernel.org/r/20231225-decode-stacktrace-cr-v1-1-9f306f38cdde@quicinc.com
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
scripts/decode_stacktrace.sh | 3 +++
1 file changed, 3 insertions(+)
diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 564c5632e1a24..cb980b144ca14 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -291,6 +291,9 @@ handle_line() {
}
while read line; do
+ # Strip unexpected carriage return at end of line
+ line=${line%$'\r'}
+
# Let's see if we have an address in the line
if [[ $line =~ \[\<([^]]+)\>\] ]] ||
[[ $line =~ [^+\ ]+\+0x[0-9a-f]+/0x[0-9a-f]+ ]]; then
--
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