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lib/test_hmm: fix error path in dmirror_devmem_fault()

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Handle migrate_vma_setup() failure via goto err for unified cleanup.

Link: https://lore.kernel.org/20260515070312.130435-1-liuqiangneo@163.com
Signed-off-by: Qiang Liu <liuqiang@kylinos.cn>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Qiang Liu 2026-05-15 15:03:11 +08:00 committed by Andrew Morton
parent 0c946c54a7
commit 6fa411adff
1 changed files with 8 additions and 2 deletions
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10
lib/test_hmm.c
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@ -1679,8 +1679,14 @@ static vm_fault_t dmirror_devmem_fault(struct vm_fault *vmf)
if (order)
args.flags |= MIGRATE_VMA_SELECT_COMPOUND;
if (migrate_vma_setup(&args))
return VM_FAULT_SIGBUS;
/*
* In practice migrate_vma_setup() should never fail unless the
* test is wrong as it just tests some static VMA properties.
*/
if (migrate_vma_setup(&args)) {
ret = VM_FAULT_SIGBUS;
goto err;
}
ret = dmirror_devmem_fault_alloc_and_copy(&args, dmirror);
if (ret)