diff options
Diffstat (limited to 'arch/alpha/kernel/ptrace.c')
| -rw-r--r-- | arch/alpha/kernel/ptrace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c index b6194defa..18c9a8b13 100644 --- a/arch/alpha/kernel/ptrace.c +++ b/arch/alpha/kernel/ptrace.c @@ -541,7 +541,9 @@ sys_ptrace(long request, long pid, long addr, long data, /* When I and D space are separate, these will need to be fixed. */ case PTRACE_PEEKTEXT: /* read word at location addr. */ case PTRACE_PEEKDATA: + down(&child->mm->mmap_sem); ret = read_long(child, addr, &tmp); + up(&child->mm->mmap_sem); DBG(DBG_MEM, ("peek %#lx->%#lx\n", addr, tmp)); if (ret < 0) goto out; @@ -560,7 +562,9 @@ sys_ptrace(long request, long pid, long addr, long data, case PTRACE_POKETEXT: /* write the word at location addr. */ case PTRACE_POKEDATA: DBG(DBG_MEM, ("poke %#lx<-%#lx\n", addr, data)); + down(&child->mm->mmap_sem); ret = write_long(child, addr, data); + up(&child->mm->mmap_sem); goto out; case PTRACE_POKEUSR: /* write the specified register */ |