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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-09 11:33:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-09 11:33:07 -0800 |
| commit | 28d838cc4dfea980cb6eda0a7409cbf91889ca74 (patch) | |
| tree | 4bbf42063718ac7744ca67ef9f67adce17bfbb5c /kernel/ptrace.c | |
| parent | ac111bfaa6b0b3c0edc63c27bd9617d6b08851ff (diff) | |
| download | lwn-28d838cc4dfea980cb6eda0a7409cbf91889ca74.tar.gz lwn-28d838cc4dfea980cb6eda0a7409cbf91889ca74.zip | |
Fix ptrace self-attach rule
Before we did CLONE_THREAD, the way to check whether we were attaching
to ourselves was to just check "current == task", but with CLONE_THREAD
we should check that the thread group ID matches instead.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/ptrace.c')
| -rw-r--r-- | kernel/ptrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 5b8dd98a230e..b88d4186cd7a 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -155,7 +155,7 @@ int ptrace_attach(struct task_struct *task) retval = -EPERM; if (task->pid <= 1) goto bad; - if (task == current) + if (task->tgid == current->tgid) goto bad; /* the same process cannot be attached many times */ if (task->ptrace & PT_PTRACED) |