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,f1,l; position p1,p2; expression *ptr != NULL; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S <... when != x when != if (...) { <+...x...+> } ( x->f1 = E | (x->f1 == NULL || ...) | f(...,x->f1,...) ) ...> ( 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> --- drivers/rtc/rtc-ep93xx.c | 14 ++++++++++---- 1 files changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c index 551332e..9da02d1 100644 --- a/drivers/rtc/rtc-ep93xx.c +++ b/drivers/rtc/rtc-ep93xx.c @@ -128,12 +128,16 @@ static int __init ep93xx_rtc_probe(struct platform_device *pdev) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) - return -ENXIO; + if (res == NULL) { + err = -ENXIO; + goto fail_free; + } res = request_mem_region(res->start, resource_size(res), pdev->name); - if (res == NULL) - return -EBUSY; + if (res == NULL) { + err = -EBUSY; + goto fail_free; + } ep93xx_rtc->mmio_base = ioremap(res->start, resource_size(res)); if (ep93xx_rtc->mmio_base == NULL) { @@ -169,6 +173,8 @@ fail: pdev->dev.platform_data = NULL; } release_mem_region(res->start, resource_size(res)); +fail_free: + kfree(ep93xx_rtc); return err; } -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
