From: Nicolas Pitre <nicolas.pitre@linaro.org>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
David Howells <dhowells@redhat.com>,
Greg Ungerer <gerg@linux-m68k.org>
Subject: [PATCH v2 07/10] binfmt_flat: use clear_user() rather than memset() to clear .bss
Date: Sun, 17 Jul 2016 23:31:53 -0400 [thread overview]
Message-ID: <1468812716-30537-8-git-send-email-nicolas.pitre@linaro.org> (raw)
In-Reply-To: <1468812716-30537-1-git-send-email-nicolas.pitre@linaro.org>
This is needed on systems with a MMU.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
---
fs/binfmt_flat.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index c85f8f1239..e981e66bb5 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -803,10 +803,11 @@ static int load_flat_file(struct linux_binprm * bprm,
flush_icache_range(start_code, end_code);
/* zero the BSS, BRK and stack areas */
- memset((void*)(datapos + data_len), 0, bss_len +
+ if (clear_user((void __user *)(datapos + data_len), bss_len +
(memp + memp_size - stack_len - /* end brk */
libinfo->lib_list[id].start_brk) + /* start brk */
- stack_len);
+ stack_len))
+ return -EFAULT;
return 0;
err:
--
2.7.4
next prev parent reply other threads:[~2016-07-18 3:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-18 3:31 [PULL REQUEST] [PATCH v2 00/10] allow BFLT executables on systems with a MMU Nicolas Pitre
2016-07-18 3:31 ` [PATCH v2 01/10] binfmt_flat: assorted cleanups Nicolas Pitre
2016-07-19 4:52 ` Greg Ungerer
2016-07-19 6:40 ` Geert Uytterhoeven
2016-07-20 4:09 ` Nicolas Pitre
2016-07-20 6:54 ` Geert Uytterhoeven
2016-07-20 7:18 ` Greg Ungerer
2016-07-18 3:31 ` [PATCH v2 02/10] elf_fdpic_transfer_args_to_stack(): make it generic Nicolas Pitre
2016-07-18 3:31 ` [PATCH v2 03/10] binfmt_flat: use generic transfer_args_to_stack() Nicolas Pitre
2016-07-18 3:31 ` [PATCH v2 04/10] binfmt_flat: clean up create_flat_tables() and stack accesses Nicolas Pitre
2016-07-18 3:31 ` [PATCH v2 05/10] binfmt_flat: use proper user space accessors with relocs processing code Nicolas Pitre
2016-07-18 3:31 ` [PATCH v2 06/10] binfmt_flat: use proper user space accessors with old relocs code Nicolas Pitre
2016-07-18 3:31 ` Nicolas Pitre [this message]
2016-07-18 3:31 ` [PATCH v2 08/10] binfmt_flat: update libraries' data segment pointer with userspace accessors Nicolas Pitre
2016-07-18 3:31 ` [PATCH v2 09/10] binfmt_flat: add MMU-specific support Nicolas Pitre
2016-07-18 3:31 ` [PATCH v2 10/10] binfmt_flat: allow compressed flat binary format to work on MMU systems Nicolas Pitre
2016-07-18 11:47 ` One Thousand Gnomes
2016-07-18 15:45 ` Nicolas Pitre
2016-07-18 16:51 ` One Thousand Gnomes
2016-07-18 16:58 ` Nicolas Pitre
2016-07-19 7:21 ` [PULL REQUEST] [PATCH v2 00/10] allow BFLT executables on systems with a MMU Greg Ungerer
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