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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-09-17 18:31:46 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-09-25 13:30:13 -0400 |
| commit | 1ae2293dd6d2f5c823cf97e60b70d03631cd622f (patch) | |
| tree | 1cd2b21bd5f6d29ba96ce66daa111cd38fd3aaed /kernel | |
| parent | 1245800c0f96eb6ebb368593e251d66c01e61022 (diff) | |
| download | linux-0-day-1ae2293dd6d2f5c823cf97e60b70d03631cd622f.tar.gz linux-0-day-1ae2293dd6d2f5c823cf97e60b70d03631cd622f.tar.xz | |
fix memory leaks in tracing_buffers_splice_read()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 8fb4847b0450d..77eeab2776ef4 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5930,9 +5930,6 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, return -EBUSY; #endif - if (splice_grow_spd(pipe, &spd)) - return -ENOMEM; - if (*ppos & (PAGE_SIZE - 1)) return -EINVAL; @@ -5942,6 +5939,9 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, len &= PAGE_MASK; } + if (splice_grow_spd(pipe, &spd)) + return -ENOMEM; + again: trace_access_lock(iter->cpu_file); entries = ring_buffer_entries_cpu(iter->trace_buffer->buffer, iter->cpu_file); @@ -5999,19 +5999,21 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, /* did we read anything? */ if (!spd.nr_pages) { if (ret) - return ret; + goto out; + ret = -EAGAIN; if ((file->f_flags & O_NONBLOCK) || (flags & SPLICE_F_NONBLOCK)) - return -EAGAIN; + goto out; ret = wait_on_pipe(iter, true); if (ret) - return ret; + goto out; goto again; } ret = splice_to_pipe(pipe, &spd); +out: splice_shrink_spd(&spd); return ret; |