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authorDan Williams <dan.j.williams@intel.com>2009-03-05 00:06:03 +0100
committerDan Williams <dan.j.williams@intel.com>2009-03-05 00:06:03 +0100
commit7cbd4877e5b167b56a3d6033b926a9f925186e12 (patch)
tree03dbe000fa5086d07df0fcae8d9ac1534bd3d239 /drivers/dma/dmatest.c
parentipu_idmac: fix spinlock type (diff)
downloadlinux-7cbd4877e5b167b56a3d6033b926a9f925186e12.tar.xz
linux-7cbd4877e5b167b56a3d6033b926a9f925186e12.zip
dmatest: fix use after free in dmatest_exit
dmatest_cleanup_chanel will free dtc, so grab ->chan before it goes away and use it to do the release. Reported-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/dmatest.c')
-rw-r--r--drivers/dma/dmatest.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 732fa1ec36ab..e190d8b30700 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -430,13 +430,15 @@ late_initcall(dmatest_init);
static void __exit dmatest_exit(void)
{
struct dmatest_chan *dtc, *_dtc;
+ struct dma_chan *chan;
list_for_each_entry_safe(dtc, _dtc, &dmatest_channels, node) {
list_del(&dtc->node);
+ chan = dtc->chan;
dmatest_cleanup_channel(dtc);
pr_debug("dmatest: dropped channel %s\n",
- dma_chan_name(dtc->chan));
- dma_release_channel(dtc->chan);
+ dma_chan_name(chan));
+ dma_release_channel(chan);
}
}
module_exit(dmatest_exit);