vduse: return compat ioctl results directly

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The compat handler handles VDUSE_IOTLB_GET_FD and VDUSE_VQ_GET_INFO, but
then calls the native handler. Their different command sizes make native
dispatch return -ENOIOCTLCMD.

For GET_FD, this overwrites receive_fd()'s return value after the
descriptor is installed, leaking one fd per call. Return handled compat
results directly and use native dispatch only for other commands.

Fixes: 455a2a1af9 ("vduse: fix compat handling for VDUSE_IOTLB_GET_FD/VDUSE_VQ_GET_INFO")
Signed-off-by: Linfeng Sun <linfeng.sun.dev@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260908-fix-vduse_dev_compat_ioctl-v1-1-62264d9bfb8d@gmail.com>

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Linfeng Sun 2026-09-08 15:31:51 +08:00 • committed by Michael S. Tsirkin

parent d7808b37da

commit 48a4ee65e6

1 changed files with 3 additions and 3 deletions

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drivers/vdpa/vdpa_user/vduse_dev.c

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