probe_event_enable/disable() check tu->inode != NULL at the start.
This is ugly, if igrab() can fail create_trace_uprobe() should not
succeed and "postpone" the failure.
Note: alloc_uprobe() should probably check igrab() != NULL as well.
Signed-off-by: Oleg Nesterov <o...@redhat.com>
---
kernel/trace/trace_uprobe.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 0c05288..f49ccf9 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -349,6 +349,8 @@ static int create_trace_uprobe(int argc, char **argv)
inode = igrab(path.dentry->d_inode);
path_put(&path);
+ if (!inode)
+ goto fail_address_parse;
ret = kstrtoul(arg, 0, &offset);
if (ret)
@@ -645,7 +647,7 @@ static int probe_event_enable(struct trace_uprobe *tu, int
flag)
struct uprobe_trace_consumer *utc;
int ret = 0;
- if (!tu->inode || tu->consumer)
+ if (tu->consumer)
return -EINTR;
utc = kzalloc(sizeof(struct uprobe_trace_consumer), GFP_KERNEL);
@@ -670,7 +672,7 @@ static int probe_event_enable(struct trace_uprobe *tu, int
flag)
static void probe_event_disable(struct trace_uprobe *tu, int flag)
{
- if (!tu->inode || !tu->consumer)
+ if (!tu->consumer)
return;
uprobe_unregister(tu->inode, tu->offset, &tu->consumer->cons);
--
1.5.5.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
