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| author | Ananth N Mavinakayanahalli <ananth@in.ibm.com> | 2006-04-20 02:43:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-20 07:54:03 -0700 |
| commit | 7522a8423bed9931cbac5502b9c0657bde2700ea (patch) | |
| tree | 8729269696269cba4ca477d711490a6c89c20cda /kernel/kprobes.c | |
| parent | 5a7b46b369419493bab4de67b1526e9f76b22a7f (diff) | |
| download | lwn-7522a8423bed9931cbac5502b9c0657bde2700ea.tar.gz lwn-7522a8423bed9931cbac5502b9c0657bde2700ea.zip | |
[PATCH] kprobes: NULL out non-relevant fields in struct kretprobe
In cases where a struct kretprobe's *_handler fields are non-NULL, it is
possible to cause a system crash, due to the possibility of calls ending up
in zombie functions. Documentation clearly states that unused *_handlers
should be set to NULL, but kprobe users sometimes fail to do so.
Fix it by setting the non-relevant fields of the struct kretprobe to NULL.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/kprobes.c')
| -rw-r--r-- | kernel/kprobes.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 1156eb0977d0..1fbf466a29aa 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -585,6 +585,9 @@ int __kprobes register_kretprobe(struct kretprobe *rp) int i; rp->kp.pre_handler = pre_handler_kretprobe; + rp->kp.post_handler = NULL; + rp->kp.fault_handler = NULL; + rp->kp.break_handler = NULL; /* Pre-allocate memory for max kretprobe instances */ if (rp->maxactive <= 0) { |