diff options
Diffstat (limited to 'arch/ppc/kernel/ptrace.c')
| -rw-r--r-- | arch/ppc/kernel/ptrace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/ppc/kernel/ptrace.c b/arch/ppc/kernel/ptrace.c index 62b2b03af..e2c6b13a0 100644 --- a/arch/ppc/kernel/ptrace.c +++ b/arch/ppc/kernel/ptrace.c @@ -362,7 +362,9 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data) case PTRACE_PEEKDATA: { unsigned long tmp; + down(&child->mm->mmap_sem); ret = read_long(child, addr, &tmp); + up(&child->mm->mmap_sem); if (ret < 0) goto out; ret = verify_area(VERIFY_WRITE, (void *) data, sizeof(long)); @@ -410,7 +412,9 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data) /* If I and D space are separate, this will have to be fixed. */ case PTRACE_POKETEXT: /* write the word at location addr. */ case PTRACE_POKEDATA: + down(&child->mm->mmap_sem); ret = write_long(child,addr,data); + up(&child->mm->mmap_sem); goto out; case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ |