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| author | Oleg Nesterov <oleg@redhat.com> | 2013-01-28 20:08:47 +0400 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2013-02-08 21:24:14 +0400 |
| commit | 7e4e28c53963e6cfa94d8109bb8f5233c5659048 (patch) | |
| tree | 5405bc0552ef0f2d8c67bb9ef6b391f5a7a504b3 /kernel | |
| parent | 4161824f18ff4f56f46595a4016c7315dd0d24f1 (diff) | |
| download | linux-7e4e28c53963e6cfa94d8109bb8f5233c5659048.tar.xz | |
uprobes/tracing: Ensure inode != NULL in create_trace_uprobe()
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.
And S_ISREG(inode->i_mode) check added by d24d7dbf is not safe.
Note: alloc_uprobe() should probably check igrab() != NULL as well.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 15b8eceeddc5..f7838cfd61b9 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -256,7 +256,7 @@ static int create_trace_uprobe(int argc, char **argv) inode = igrab(path.dentry->d_inode); path_put(&path); - if (!S_ISREG(inode->i_mode)) { + if (!inode || !S_ISREG(inode->i_mode)) { ret = -EINVAL; goto fail_address_parse; } @@ -544,7 +544,7 @@ 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); @@ -568,7 +568,7 @@ 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); |