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| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2016-07-24 17:30:23 +0200 |
|---|---|---|
| committer | Greg Ungerer <gerg@linux-m68k.org> | 2016-07-28 05:29:11 +0200 |
| commit | 467aa1465a7b9f0bd1a23c83bff8c38e3c3e660e (patch) | |
| tree | e5e478b273192a601f81bee6a8d3f78116cdffb9 | |
| parent | binfmt_flat: use proper user space accessors with old relocs code (diff) | |
| download | linux-467aa1465a7b9f0bd1a23c83bff8c38e3c3e660e.tar.xz linux-467aa1465a7b9f0bd1a23c83bff8c38e3c3e660e.zip | |
binfmt_flat: use clear_user() rather than memset() to clear .bss
This is needed on systems with a MMU.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
| -rw-r--r-- | fs/binfmt_flat.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index 8e812d7a62e0..eb747a266537 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: |