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vfio/iommufd: Fix SIGSEV in iommufd_cdev_attach()

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When iommufd_cdev_ram_block_discard_disable() fails for whatever reason,
errp should be set or else SIGSEV is triggered in vfio_realize() when
error_prepend() is called.

By this chance, use the same error message for both legacy and iommufd
backend.

Fixes: 5ee3dc7af7 ("vfio/iommufd: Implement the iommufd backend")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20250116102307.260849-1-zhenzhong.duan@intel.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Zhenzhong Duan 2025-01-16 18:23:07 +08:00 • committed by Cédric Le Goater
parent e45891e0b1
commit 7b3d5b84cb
1 changed files with 3 additions and 2 deletions
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5
hw/vfio/iommufd.c
View file

@ -515,8 +515,8 @@ static bool iommufd_cdev_attach(const char *name, VFIODevice *vbasedev,
} else {
ret = iommufd_cdev_ram_block_discard_disable(true);
if (ret) {
error_setg(errp,
"Cannot set discarding of RAM broken (%d)", ret);
error_setg_errno(errp, -ret,
"Cannot set discarding of RAM broken");
goto err_discard_disable;
}
goto found_container;
@ -544,6 +544,7 @@ static bool iommufd_cdev_attach(const char *name, VFIODevice *vbasedev,
ret = iommufd_cdev_ram_block_discard_disable(true);
if (ret) {
error_setg_errno(errp, -ret, "Cannot set discarding of RAM broken");
goto err_discard_disable;
}