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| author | Arnd Bergmann <arnd@arndb.de> | 2026-02-13 18:40:46 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2026-06-10 09:16:59 +0300 |
| commit | 455a2a1af92651764e9eb42cec0d95ac142afc28 (patch) | |
| tree | bcb566345ff42313fb92996046915b8a872d2f05 /include/linux/stackprotector.h | |
| parent | ec6177dfe98b9be1c3ede6c0dfe4394ea2a76959 (diff) | |
| download | linux-455a2a1af92651764e9eb42cec0d95ac142afc28.tar.xz | |
vduse: fix compat handling for VDUSE_IOTLB_GET_FD/VDUSE_VQ_GET_INFO
These two ioctls are incompatible on 32-bit x86 userspace, because
the data structures are shorter than they are on 64-bit.
Add a proper .compat_ioctl handler for x86 that reads the structures
with the smaller padding before calling the internal handlers. On
all other architectures, CONFIG_COMPAT_FOR_U64_ALIGNMENT is disabled
and no special handling is required.
Fixes: ad146355bfad ("vduse: Support querying information of IOVA regions")
Fixes: c8a6153b6c59 ("vduse: Introduce VDUSE - vDPA Device in Userspace")
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260213154051.4172275-1-arnd@kernel.org>
Diffstat (limited to 'include/linux/stackprotector.h')
0 files changed, 0 insertions, 0 deletions