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| author | Miaoqian Lin <linmq006@gmail.com> | 2025-08-28 15:00:51 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-25 11:00:05 +0200 |
| commit | 4f364023ddcfe83f7073b973a9cb98584b7f2a46 (patch) | |
| tree | 345d0cc60c61ccc8bcd0199a7f317449f851ca26 /arch | |
| parent | 5d2c34ff78b89e53cc964a9b423ccb95c1a0c9fd (diff) | |
| download | linux-4f364023ddcfe83f7073b973a9cb98584b7f2a46.tar.gz linux-4f364023ddcfe83f7073b973a9cb98584b7f2a46.tar.bz2 linux-4f364023ddcfe83f7073b973a9cb98584b7f2a46.zip | |
um: virtio_uml: Fix use-after-free after put_device in probe
[ Upstream commit 7ebf70cf181651fe3f2e44e95e7e5073d594c9c0 ]
When register_virtio_device() fails in virtio_uml_probe(),
the code sets vu_dev->registered = 1 even though
the device was not successfully registered.
This can lead to use-after-free or other issues.
Fixes: 04e5b1fb0183 ("um: virtio: Remove device on disconnect")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/um/drivers/virtio_uml.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index 8adca2000e51..d790acfc2c67 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -1229,10 +1229,12 @@ static int virtio_uml_probe(struct platform_device *pdev) device_set_wakeup_capable(&vu_dev->vdev.dev, true); rc = register_virtio_device(&vu_dev->vdev); - if (rc) + if (rc) { put_device(&vu_dev->vdev.dev); + return rc; + } vu_dev->registered = 1; - return rc; + return 0; error_init: os_close_file(vu_dev->sock); |