The patch titled Subject: scripts/decode_stacktrace.sh: fix build ID and PC source parsing has been added to the -mm mm-hotfixes-unstable branch. Its filename is scripts-decode_stacktracesh-fix-build-id-and-pc-source-parsing.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Carlos Llamas cmllamas@google.com Subject: scripts/decode_stacktrace.sh: fix build ID and PC source parsing Date: Thu, 30 Oct 2025 01:03:33 +0000

Support for parsing PC source info in stacktraces (e.g. '(P)') was added in commit 2bff77c665ed ("scripts/decode_stacktrace.sh: fix decoding of lines with an additional info"). However, this logic was placed after the build ID processing. This incorrect order fails to parse lines containing both elements, e.g.:

drm_gem_mmap_obj+0x114/0x200 [drm 03d0564e0529947d67bb2008c3548be77279fd27] (P)

This patch fixes the problem by extracting the PC source info first and then processing the module build ID. With this change, the line above is now properly parsed as such:

drm_gem_mmap_obj (./include/linux/mmap_lock.h:212 ./include/linux/mm.h:811 drivers/gpu/drm/drm_gem.c:1177) drm (P)

While here, also add a brief explanation the build ID section.

Link: https://lkml.kernel.org/r/20251030010347.2731925-1-cmllamas@google.com Fixes: bdf8eafbf7f5 ("arm64: stacktrace: report source of unwind data") Fixes: 2bff77c665ed ("scripts/decode_stacktrace.sh: fix decoding of lines with an additional info") Signed-off-by: Carlos Llamas cmllamas@google.com Reviewed-by: Matthieu Baerts (NGI0) matttbe@kernel.org Reviewed-by: Luca Ceresoli luca.ceresoli@bootlin.com Cc: Breno Leitao leitao@debian.org Cc: Catalin Marinas catalin.marinas@arm.com Cc: Marc Rutland mark.rutland@arm.com Cc: Mark Brown broonie@kernel.org Cc: Matthieu Baerts matttbe@kernel.org Cc: Miroslav Benes mbenes@suse.cz Cc: Puranjay Mohan puranjay@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

scripts/decode_stacktrace.sh | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/scripts/decode_stacktrace.sh~scripts-decode_stacktracesh-fix-build-id-and-pc-source-parsing +++ a/scripts/decode_stacktrace.sh @@ -277,12 +277,6 @@ handle_line() { fi done

- if [[ ${words[$last]} =~ ^[0-9a-f]+] ]]; then - words[$last-1]="${words[$last-1]} ${words[$last]}" - unset words[$last] spaces[$last] - last=$(( $last - 1 )) - fi - # Extract info after the symbol if present. E.g.: # func_name+0x54/0x80 (P) # ^^^ @@ -294,6 +288,14 @@ handle_line() { unset words[$last] spaces[$last] last=$(( $last - 1 )) fi + + # Join module name with its build id if present, as these were + # split during tokenization (e.g. "[module" and "modbuildid]"). + if [[ ${words[$last]} =~ ^[0-9a-f]+] ]]; then + words[$last-1]="${words[$last-1]} ${words[$last]}" + unset words[$last] spaces[$last] + last=$(( $last - 1 )) + fi

if [[ ${words[$last]} =~ [([^]]+)] ]]; then module=${words[$last]} _

Patches currently in -mm which might be from cmllamas@google.com are

scripts-decode_stacktracesh-fix-build-id-and-pc-source-parsing.patch