4.19-stable review patch. If anyone has any objections, please let me know.
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From: Josh Poimboeuf jpoimboe@redhat.com
commit 0c671812f152b628bd87c0af49da032cc2a2c319 upstream.
Objtool uses over 512k of stack, thanks to the hash table embedded in the objtool_file struct. This causes an unnecessarily large stack allocation and breaks users with low stack limits.
Move the struct off the stack.
Fixes: 042ba73fe7eb ("objtool: Add several performance improvements") Reported-by: Vassili Karpov moosotc@gmail.com Signed-off-by: Josh Poimboeuf jpoimboe@redhat.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: Peter Zijlstra peterz@infradead.org Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/df92dcbc4b84b02ffa252f46876df125fb56e2d7.155295417... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/objtool/check.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2157,9 +2157,10 @@ static void cleanup(struct objtool_file elf_close(file->elf); }
+static struct objtool_file file; + int check(const char *_objname, bool orc) { - struct objtool_file file; int ret, warnings = 0;
objname = _objname;