diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/binfmt_elf.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index c2eac2a50bd..7158448fe0d 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -86,7 +86,7 @@ static struct linux_binfmt elf_format = { .min_coredump = ELF_EXEC_PAGESIZE }; -#define BAD_ADDR(x) ((unsigned long)(x) > TASK_SIZE) +#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE) static int set_brk(unsigned long start, unsigned long end) { @@ -389,7 +389,7 @@ static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex, * <= p_memsize so it is only necessary to check p_memsz. */ k = load_addr + eppnt->p_vaddr; - if (k > TASK_SIZE || eppnt->p_filesz > eppnt->p_memsz || + if (BAD_ADDR(k) || eppnt->p_filesz > eppnt->p_memsz || eppnt->p_memsz > TASK_SIZE || TASK_SIZE - eppnt->p_memsz < k) { error = -ENOMEM; goto out_close; @@ -871,7 +871,7 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs) * allowed task size. Note that p_filesz must always be * <= p_memsz so it is only necessary to check p_memsz. */ - if (k > TASK_SIZE || elf_ppnt->p_filesz > elf_ppnt->p_memsz || + if (BAD_ADDR(k) || elf_ppnt->p_filesz > elf_ppnt->p_memsz || elf_ppnt->p_memsz > TASK_SIZE || TASK_SIZE - elf_ppnt->p_memsz < k) { /* set_brk can never work. Avoid overflows. */ @@ -925,10 +925,9 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs) interpreter, &interp_load_addr); if (BAD_ADDR(elf_entry)) { - printk(KERN_ERR "Unable to load interpreter %.128s\n", - elf_interpreter); force_sig(SIGSEGV, current); - retval = -ENOEXEC; /* Nobody gets to see this, but.. */ + retval = IS_ERR((void *)elf_entry) ? + (int)elf_entry : -EINVAL; goto out_free_dentry; } reloc_func_desc = interp_load_addr; @@ -939,8 +938,8 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs) } else { elf_entry = loc->elf_ex.e_entry; if (BAD_ADDR(elf_entry)) { - send_sig(SIGSEGV, current, 0); - retval = -ENOEXEC; /* Nobody gets to see this, but.. */ + force_sig(SIGSEGV, current); + retval = -EINVAL; goto out_free_dentry; } } |