The patch titled
kernel/trace/trace.c: introduce missing kfree()
has been added to the -mm tree. Its filename is
kernel-trace-tracec-introduce-missing-kfree.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: kernel/trace/trace.c: introduce missing kfree()
From: Julia Lawall <julia@xxxxxxx>
Error handling code following a kzalloc should free the allocated data.
The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,l;
position p1,p2;
expression *ptr != NULL;
@@
(
if ((x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...)) == NULL) S
|
x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
)
<... when != x
when != if (...) { <+...x...+> }
x->f = E
...>
(
return \(0\|<+...x...+>\|ptr\);
|
return@p2 ...;
)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>
Signed-off-by: Julia Lawall <julia@xxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/trace/trace.c | 1 +
1 file changed, 1 insertion(+)
diff -puN kernel/trace/trace.c~kernel-trace-tracec-introduce-missing-kfree kernel/trace/trace.c
--- a/kernel/trace/trace.c~kernel-trace-tracec-introduce-missing-kfree
+++ a/kernel/trace/trace.c
@@ -2139,6 +2139,7 @@ __tracing_open(struct inode *inode, stru
ring_buffer_read_finish(iter->buffer_iter[cpu]);
}
mutex_unlock(&trace_types_lock);
+ kfree(iter);
return ERR_PTR(-ENOMEM);
}
_
Patches currently in -mm which might be from julia@xxxxxxx are
drivers-video-bad-error-test-before-a-dereference.patch
linux-next.patch
drivers-media-use-array_size.patch
drivers-mtd-maps-nettelc-use-array_size.patch
net-tipc-bcasth-use-array_size.patch
drivers-isdn-misdn-use-array_size.patch
drivers-message-fusion-use-array_size.patch
fs-namespacec-drop-code-after-return.patch
drivers-net-wireless-ath9k-rcc-use-array_size.patch
kernel-trace-tracec-introduce-missing-kfree.patch
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