diff options
| author | Nikita Shubin <n.shubin@yadro.com> | 2024-05-28 09:09:25 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2024-06-11 20:58:41 +0300 |
| commit | 29b7cd255f3628e0d65be33a939d8b5bba10aa62 (patch) | |
| tree | 01aa6661757114f95afba4afbf43ebc7ab6bef75 /drivers/dma | |
| parent | f0dc9fda2e0ee9e01496c2f5aca3a831131fad79 (diff) | |
| download | linux-29b7cd255f3628e0d65be33a939d8b5bba10aa62.tar.xz | |
dmaengine: ioatdma: Fix kmemleak in ioat_pci_probe()
If probing fails we end up with leaking ioatdma_device and each
allocated channel.
Following kmemleak easy to reproduce by injecting an error in
ioat_alloc_chan_resources() when doing ioat_dma_self_test().
unreferenced object 0xffff888014ad5800 (size 1024): [..]
[<ffffffff827692ca>] kmemleak_alloc+0x4a/0x80
[<ffffffff81430600>] kmalloc_trace+0x270/0x2f0
[<ffffffffa000b7d1>] ioat_pci_probe+0xc1/0x1c0 [ioatdma]
[..]
repeated for each ioatdma channel:
unreferenced object 0xffff8880148e5c00 (size 512): [..]
[<ffffffff827692ca>] kmemleak_alloc+0x4a/0x80
[<ffffffff81430600>] kmalloc_trace+0x270/0x2f0
[<ffffffffa0009641>] ioat_enumerate_channels+0x101/0x2d0 [ioatdma]
[<ffffffffa000b266>] ioat3_dma_probe+0x4d6/0x970 [ioatdma]
[<ffffffffa000b891>] ioat_pci_probe+0x181/0x1c0 [ioatdma]
[..]
Fixes: bf453a0a18b2 ("dmaengine: ioat: Support in-use unbind")
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20240528-ioatdma-fixes-v2-3-a9f2fbe26ab1@yadro.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/ioat/init.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 26964b7c8cf1..cf688b0c8444 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -1347,6 +1347,7 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) void __iomem * const *iomap; struct device *dev = &pdev->dev; struct ioatdma_device *device; + unsigned int i; u8 version; int err; @@ -1384,6 +1385,9 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) err = ioat3_dma_probe(device, ioat_dca_enabled); if (err) { + for (i = 0; i < IOAT_MAX_CHANS; i++) + kfree(device->idx[i]); + kfree(device); dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); return -ENODEV; } |