linux-kernel - [PATCH] elf: fix "start

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Message-ID: <20190523175736.GA6222@avx2>
Date:   Thu, 23 May 2019 20:57:36 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] elf: fix "start_code" evaluation

Only executable ELF program headers should change ->start_code.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/binfmt_elf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1026,7 +1026,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 			}
 		}
 		k = elf_ppnt->p_vaddr;
-		if (k < start_code)
+		if ((elf_ppnt->p_flags & PF_X) && k < start_code)
 			start_code = k;
 		if (start_data < k)
 			start_data = k;