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Date: Tue, 17 Mar 2009 01:20:59 -0500 From: Tom Zanussi <tzanussi@...il.com> To: linux-kernel <linux-kernel@...r.kernel.org> Cc: Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>, Frédéric Weisbecker <fweisbec@...il.com> Subject: [PATCH] tracing: fix leak in event_format_read() If event_format_read() exits early due to nonzero ppos, the previously kmalloc doesn't get freed - might as well do the check before the kmalloc and avoid the problem. Signed-off-by: Tom Zanussi <tzanussi@...il.com> --- kernel/trace/trace_events.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 238ea95..c88227b 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -378,15 +378,15 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt, char *buf; int r; + if (*ppos) + return 0; + s = kmalloc(sizeof(*s), GFP_KERNEL); if (!s) return -ENOMEM; trace_seq_init(s); - if (*ppos) - return 0; - /* If any of the first writes fail, so will the show_format. */ trace_seq_printf(s, "name: %s\n", call->name); -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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