diff options
Diffstat (limited to 'fs/binfmt_elf.c')
| -rw-r--r-- | fs/binfmt_elf.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 788d8c0d5..394ea69dd 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -261,12 +261,14 @@ static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex, if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) elf_type |= MAP_FIXED; + down(¤t->mm->mmap_sem); map_addr = do_mmap(interpreter, load_addr + ELF_PAGESTART(vaddr), eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr), elf_prot, elf_type, eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr)); + up(¤t->mm->mmap_sem); if (map_addr > -1024UL) /* Real error */ goto out_close; @@ -620,11 +622,13 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs) elf_flags |= MAP_FIXED; } + down(¤t->mm->mmap_sem); error = do_mmap(bprm->file, ELF_PAGESTART(load_bias + vaddr), (elf_ppnt->p_filesz + ELF_PAGEOFFSET(elf_ppnt->p_vaddr)), elf_prot, elf_flags, (elf_ppnt->p_offset - ELF_PAGEOFFSET(elf_ppnt->p_vaddr))); + up(¤t->mm->mmap_sem); if (!load_addr_set) { load_addr_set = 1; @@ -734,8 +738,10 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs) Since we do not have the power to recompile these, we emulate the SVr4 behavior. Sigh. */ /* N.B. Shouldn't the size here be PAGE_SIZE?? */ + down(¤t->mm->mmap_sem); error = do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC, MAP_FIXED | MAP_PRIVATE, 0); + up(¤t->mm->mmap_sem); } #ifdef ELF_PLAT_INIT |