summaryrefslogtreecommitdiff
path: root/drivers/iommu/iova.c
diff options
context:
space:
mode:
authorXiaotao Yin <xiaotao.yin@windriver.com>2019-12-10 07:27:04 +0300
committerJoerg Roedel <jroedel@suse.de>2019-12-17 13:13:20 +0300
commit472d26df5e8075eda677b6be730e0fbf434ff2a8 (patch)
tree746c0ea2bd73be720fc5576df5795055a543d087 /drivers/iommu/iova.c
parentd1eef1c619749b2a57e514a3fa67d9a516ffa919 (diff)
downloadlinux-472d26df5e8075eda677b6be730e0fbf434ff2a8.tar.xz
iommu/iova: Init the struct iova to fix the possible memleak
During ethernet(Marvell octeontx2) set ring buffer test: ethtool -G eth1 rx <rx ring size> tx <tx ring size> following kmemleak will happen sometimes: unreferenced object 0xffff000b85421340 (size 64): comm "ethtool", pid 867, jiffies 4295323539 (age 550.500s) hex dump (first 64 bytes): 80 13 42 85 0b 00 ff ff ff ff ff ff ff ff ff ff ..B............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ff ff ff ff ff ff ff ff 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000001b204ddf>] kmem_cache_alloc+0x1b0/0x350 [<00000000d9ef2e50>] alloc_iova+0x3c/0x168 [<00000000ea30f99d>] alloc_iova_fast+0x7c/0x2d8 [<00000000b8bb2f1f>] iommu_dma_alloc_iova.isra.0+0x12c/0x138 [<000000002f1a43b5>] __iommu_dma_map+0x8c/0xf8 [<00000000ecde7899>] iommu_dma_map_page+0x98/0xf8 [<0000000082004e59>] otx2_alloc_rbuf+0xf4/0x158 [<000000002b107f6b>] otx2_rq_aura_pool_init+0x110/0x270 [<00000000c3d563c7>] otx2_open+0x15c/0x734 [<00000000a2f5f3a8>] otx2_dev_open+0x3c/0x68 [<00000000456a98b5>] otx2_set_ringparam+0x1ac/0x1d4 [<00000000f2fbb819>] dev_ethtool+0xb84/0x2028 [<0000000069b67c5a>] dev_ioctl+0x248/0x3a0 [<00000000af38663a>] sock_ioctl+0x280/0x638 [<000000002582384c>] do_vfs_ioctl+0x8b0/0xa80 [<000000004e1a2c02>] ksys_ioctl+0x84/0xb8 The reason: When alloc_iova_mem() without initial with Zero, sometimes fpn_lo will equal to IOVA_ANCHOR by chance, so when return with -ENOMEM(iova32_full) from __alloc_and_insert_iova_range(), the new_iova will not be freed in free_iova_mem(). Fixes: bb68b2fbfbd6 ("iommu/iova: Add rbtree anchor node") Signed-off-by: Xiaotao Yin <xiaotao.yin@windriver.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iova.c')
-rw-r--r--drivers/iommu/iova.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index 41c605b0058f..c7a914b9bbbc 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -233,7 +233,7 @@ static DEFINE_MUTEX(iova_cache_mutex);
struct iova *alloc_iova_mem(void)
{
- return kmem_cache_alloc(iova_cache, GFP_ATOMIC);
+ return kmem_cache_zalloc(iova_cache, GFP_ATOMIC);
}
EXPORT_SYMBOL(alloc_iova_mem);