linux-kernel - [PATCH v2 1/1] fs/binfmt_elf_fdpic: fix error return code in load_elf_fdpic

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Date:   Thu, 15 Jul 2021 15:41:14 +0800
From:   Zhen Lei <thunder.leizhen@...wei.com>
To:     Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
CC:     Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH v2 1/1] fs/binfmt_elf_fdpic: fix error return code in load_elf_fdpic_binary()

When the call to create_elf_fdpic_tables() fails, the returned error code
should be propagated. However, we currently do not explicitly assign this
error code to 'retval'. As a result, 0 was incorrectly returned.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 fs/binfmt_elf_fdpic.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index cf4028487dcc..4efc1d6a5d22 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -434,8 +434,9 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm)
 	current->mm->start_stack = current->mm->start_brk + stack_size;
 #endif
 
-	if (create_elf_fdpic_tables(bprm, current->mm,
-				    &exec_params, &interp_params) < 0)
+	retval = create_elf_fdpic_tables(bprm, current->mm,
+					 &exec_params, &interp_params);
+	if (retval < 0)
 		goto error;
 
 	kdebug("- start_code  %lx", current->mm->start_code);
-- 
2.25.1