kernel/linux.git - Linux kernel stable tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2025-02-01	scripts/sorttable: fix orc_sort_cmp() to maintain symmetry and transitivity	Kuan-Wei Chiu	1	-3/+7
	commit 0210d251162f4033350a94a43f95b1c39ec84a90 upstream. The orc_sort_cmp() function, used with qsort(), previously violated the symmetry and transitivity rules required by the C standard. Specifically, when both entries are ORC_TYPE_UNDEFINED, it could result in both a < b and b < a, which breaks the required symmetry and transitivity. This can lead to undefined behavior and incorrect sorting results, potentially causing memory corruption in glibc implementations [1]. Symmetry: If x < y, then y > x. Transitivity: If x < y and y < z, then x < z. Fix the comparison logic to return 0 when both entries are ORC_TYPE_UNDEFINED, ensuring compliance with qsort() requirements. Link: https://www.qualys.com/2024/01/30/qsort.txt [1] Link: https://lkml.kernel.org/r/20241226140332.2670689-1-visitorckw@gmail.com Fixes: 57fa18994285 ("scripts/sorttable: Implement build-time ORC unwind table sorting") Fixes: fb799447ae29 ("x86,objtool: Split UNWIND_HINT_EMPTY in two") Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com> Cc: Ching-Chun (Jim) Huang <jserv@ccns.ncku.edu.tw> Cc: <chuang@cs.nycu.edu.tw> Cc: Ingo Molnar <mingo@kernel.org> Cc: Josh Poimboeuf <jpoimboe@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shile Zhang <shile.zhang@linux.alibaba.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-13	scripts/sorttable: Implement build-time ORC unwind table sorting	Shile Zhang	1	-5/+175
	The ORC unwinder has two tables: .orc_unwind_ip and .orc_unwind, which need to be sorted for binary search. Previously this sorting was done during bootup. Sort them at build time to speed up booting. Add the ORC tables sorting in a parallel build process to speed up the build. [ mingo: Rewrote the changelog and fixed some comments. ] Suggested-by: Andy Lutomirski <luto@amacapital.net> Suggested-by: Peter Zijlstra <peterz@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-7-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-12-13	scripts/sorttable: Rename 'sortextable' to 'sorttable'	Shile Zhang	1	-0/+210
	Use a more generic name for additional table sorting usecases, such as the upcoming ORC table sorting feature. This tool is not tied to exception table sorting anymore. No functional changes intended. [ mingo: Rewrote the changelog. ] Signed-off-by: Shile Zhang <shile.zhang@linux.alibaba.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Michal Marek <michal.lkml@markovi.net> Cc: linux-kbuild@vger.kernel.org Link: https://lkml.kernel.org/r/20191204004633.88660-6-shile.zhang@linux.alibaba.com Signed-off-by: Ingo Molnar <mingo@kernel.org>