diff options
Diffstat (limited to 'fs/binfmt_elf.c')
| -rw-r--r-- | fs/binfmt_elf.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index a66bc8df6d6f..6eb6971bdee2 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -88,7 +88,10 @@ static int set_brk(unsigned long start, unsigned long end) start = ELF_PAGEALIGN(start); end = ELF_PAGEALIGN(end); if (end > start) { - unsigned long addr = do_brk(start, end - start); + unsigned long addr; + down_write(¤t->mm->mmap_sem); + addr = do_brk(start, end - start); + up_write(¤t->mm->mmap_sem); if (BAD_ADDR(addr)) return addr; } @@ -409,7 +412,9 @@ static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex, /* Map the last of the bss segment */ if (last_bss > elf_bss) { + down_write(¤t->mm->mmap_sem); error = do_brk(elf_bss, last_bss - elf_bss); + up_write(¤t->mm->mmap_sem); if (BAD_ADDR(error)) goto out_close; } @@ -449,7 +454,9 @@ static unsigned long load_aout_interp(struct exec * interp_ex, goto out; } + down_write(¤t->mm->mmap_sem); do_brk(0, text_data); + up_write(¤t->mm->mmap_sem); if (!interpreter->f_op || !interpreter->f_op->read) goto out; if (interpreter->f_op->read(interpreter, addr, text_data, &offset) < 0) @@ -457,8 +464,11 @@ static unsigned long load_aout_interp(struct exec * interp_ex, flush_icache_range((unsigned long)addr, (unsigned long)addr + text_data); + + down_write(¤t->mm->mmap_sem); do_brk(ELF_PAGESTART(text_data + ELF_MIN_ALIGN - 1), interp_ex->a_bss); + up_write(¤t->mm->mmap_sem); elf_entry = interp_ex->a_entry; out: |