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Thu, 18 Sep 2025 06:05:29 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-devel/message/119526 From: Changqing Li Command "pahole --btf_features=default -J" will segmentation fault when kernel-dbg package is also installed. $pahole --btf_features=default -J pahole[599]: segfault at 8 ip 00007f7c92d819e2 sp 00007f7c799febe0 error 6 in libdwarves.so.1.0.0[189e2,7f7c92d72000+1c000] likely on CPU 0 (core 0, socket 0) Code: 74 19 ff ff 48 39 dd 75 ef 4c 89 ef e8 67 19 ff ff 49 8b 7c 24 18 e8 8d 13 ff ff 49 8b 14 24 49 8b 44 24 08 4c 89 e7 45 31 e4 <48> 89 42 08 48 89 10 e8 42 19 ff ff e9 30 ff ff ff e8 58 0a ff ff Segmentation fault (core dumped) Signed-off-by: Changqing Li --- ...r-Fix-elf_functions-cleanup-on-error.patch | 54 +++++++++++++++++++ .../recipes-devtools/pahole/pahole_1.29.bb | 3 +- 2 files changed, 56 insertions(+), 1 deletion(-) create mode 100644 meta-oe/recipes-devtools/pahole/files/0001-btf_encoder-Fix-elf_functions-cleanup-on-error.patch diff --git a/meta-oe/recipes-devtools/pahole/files/0001-btf_encoder-Fix-elf_functions-cleanup-on-error.patch b/meta-oe/recipes-devtools/pahole/files/0001-btf_encoder-Fix-elf_functions-cleanup-on-error.patch new file mode 100644 index 0000000000..dad5a9646a --- /dev/null +++ b/meta-oe/recipes-devtools/pahole/files/0001-btf_encoder-Fix-elf_functions-cleanup-on-error.patch @@ -0,0 +1,54 @@ +From 6fa2b7de3e647e64c5d693aea7f3bacbfa964f53 Mon Sep 17 00:00:00 2001 +From: Ihor Solodari +Date: Wed, 20 Aug 2025 09:00:03 +0100 +Subject: [PATCH] btf_encoder: Fix elf_functions cleanup on error + +When elf_functions__new() errors out and jumps to +elf_functions__delete(), pahole segfaults on attempt to list_del() the +elf_functions instance from a list, to which it was never added. + +Fix this by moving list_del() call out of elf_functions__delete(). +Remove from the list only on normal cleanup in +elf_functions_list__clear(). + +v1: +https://lore.kernel.org/dwarves/979a1ac4-21d3-4384-8ce4-d10f41887088@linux.dev/ + +Closes: +https://lore.kernel.org/dwarves/24bcc853-533c-42ab-bc37-0c13e0baa217@windriver.com/ +Reported-by: Changqing Li +Signed-off-by: Ihor Solodrai +Reviewed-by: Arnaldo Carvalho de Melo +Link: https://lore.kernel.org/dwarves/acef4a0e-7d3b-4e05-b3ca-1007580f2754@linux.dev/ +Signed-off-by: Alan Maguire + +Upstream-Status: Backport [https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?h=next&id=fe6738f4b46b63dcdc5b15b252a014b3eaba16a4] + +Signed-off-by: Changqing Li +--- + btf_encoder.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/btf_encoder.c b/btf_encoder.c +index 511c1ea..2f8c6bb 100644 +--- a/btf_encoder.c ++++ b/btf_encoder.c +@@ -162,7 +162,6 @@ static inline void elf_functions__delete(struct elf_functions *funcs) + free(funcs->entries[i].alias); + free(funcs->entries); + elf_symtab__delete(funcs->symtab); +- list_del(&funcs->node); + free(funcs); + } + +@@ -204,6 +203,7 @@ static inline void elf_functions_list__clear(struct list_head *elf_functions_lis + + list_for_each_safe(pos, tmp, elf_functions_list) { + funcs = list_entry(pos, struct elf_functions, node); ++ list_del(&funcs->node); + elf_functions__delete(funcs); + } + } +-- +2.34.1 + diff --git a/meta-oe/recipes-devtools/pahole/pahole_1.29.bb b/meta-oe/recipes-devtools/pahole/pahole_1.29.bb index d5fa3b4746..b5110d05f5 100644 --- a/meta-oe/recipes-devtools/pahole/pahole_1.29.bb +++ b/meta-oe/recipes-devtools/pahole/pahole_1.29.bb @@ -11,7 +11,8 @@ COMPATIBLE_HOST = "(x86_64|i.86|arm|aarch64|riscv64|powerpc|powerpc64|mips64).*- SRCREV = "b9cc7963051b2099795129450f9b70c81950d02f" SRC_URI = "git://git.kernel.org/pub/scm/devel/pahole/pahole.git;branch=master \ - file://0001-Use-usr-bin-env-python3-instead-of-just-usr-bin-pyth.patch" + file://0001-Use-usr-bin-env-python3-instead-of-just-usr-bin-pyth.patch \ + file://0001-btf_encoder-Fix-elf_functions-cleanup-on-error.patch" S = "${WORKDIR}/git"