From: Julien Thierry <jthierry@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: jpoimboe@redhat.com, peterz@infradead.org, mbenes@suse.cz,
Julien Thierry <jthierry@redhat.com>
Subject: [PATCH] objtool: Fix off-by-one in symbol_by_offset()
Date: Fri, 3 Apr 2020 14:17:30 +0100 [thread overview]
Message-ID: <20200403131730.32618-1-jthierry@redhat.com> (raw)
Sometimes, WARN_FUNC() and other users of symbol_by_offset() will
associate the first instruction of a symbol with the symbol preceding
it.
This is because symbol->offset + symbol->len is already outside of the
symbol's range.
Signed-off-by: Julien Thierry <jthierry@redhat.com>
---
tools/objtool/elf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index 09ddc8f1def3..c4857fa3f1d1 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -105,7 +105,7 @@ static int symbol_by_offset(const void *key, const struct rb_node *node)
if (*o < s->offset)
return -1;
- if (*o > s->offset + s->len)
+ if (*o >= s->offset + s->len)
return 1;
return 0;
--
2.21.1
next reply other threads:[~2020-04-03 13:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-03 13:17 Julien Thierry [this message]
2020-04-03 14:50 ` Josh Poimboeuf
2020-04-06 9:11 ` Miroslav Benes
2020-04-14 12:53 Josh Poimboeuf
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