From: nicolas.pitre@linaro.org (Nicolas Pitre)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 09/15] binfmt_flat: use clear_user() rather than memset() to clear .bss
Date: Sun, 24 Jul 2016 11:30:23 -0400 [thread overview]
Message-ID: <1469374229-21585-10-git-send-email-nicolas.pitre@linaro.org> (raw)
In-Reply-To: <1469374229-21585-1-git-send-email-nicolas.pitre@linaro.org>
This is needed on systems with a MMU.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
---
fs/binfmt_flat.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 63756ca6a7..92c1530a2c 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -795,10 +795,11 @@ 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 +
- (memp + memp_size - stack_len - /* end brk */
- libinfo->lib_list[id].start_brk) + /* start brk */
- stack_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))
+ return -EFAULT;
return 0;
err:
--
2.7.4
next prev parent reply other threads:[~2016-07-24 15:30 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-24 15:30 [PATCH v5 00/15] allow BFLT executables on systems with a MMU Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 01/15] binfmt_flat: assorted cleanups Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 02/15] binfmt_flat: convert printk invocations to their modern form Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 03/15] binfmt_flat: prevent kernel dammage from corrupted executable headers Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 04/15] elf_fdpic_transfer_args_to_stack(): make it generic Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 05/15] binfmt_flat: use generic transfer_args_to_stack() Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 06/15] binfmt_flat: clean up create_flat_tables() and stack accesses Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 07/15] binfmt_flat: use proper user space accessors with relocs processing code Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 08/15] binfmt_flat: use proper user space accessors with old relocs code Nicolas Pitre
2016-07-24 15:30 ` Nicolas Pitre [this message]
2016-07-24 15:30 ` [PATCH v5 10/15] binfmt_flat: update libraries' data segment pointer with userspace accessors Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 11/15] binfmt_flat: add MMU-specific support Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 12/15] binfmt_flat: allow compressed flat binary format to work on MMU systems Nicolas Pitre
2016-07-24 19:48 ` Arnd Bergmann
2016-07-24 20:25 ` Nicolas Pitre
2016-07-25 8:18 ` Arnd Bergmann
2016-07-24 15:30 ` [PATCH v5 13/15] m68k: fix bFLT executable running on MMU enabled systems Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 14/15] m68k: enable binfmt_flat on systems with an MMU Nicolas Pitre
2016-07-24 15:30 ` [PATCH v5 15/15] ARM: " Nicolas Pitre
2016-07-26 0:53 ` [PATCH v5 00/15] allow BFLT executables on systems with a MMU Greg Ungerer
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