io_uring/memmap: return -EINVAL from get_unmapped_area() on bad mmap

get_unmapped_area() returns -ENOMEM when io_uring_validate_mmap_request()
fails, but validation errors are -EINVAL. Propagate that errno to
userspace, like io_uring_mmap() already does.

Signed-off-by: Yi Xie <xieyi@kylinos.cn>
Link: https://patch.msgid.link/20260630091206.126206-1-xieyi@kylinos.cn
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/io_uring/memmap.c b/io_uring/memmap.c
index da1f6c5d07f8a092ebbfbd5d2c716a497828557d..23e8a85111bca6ee71258b11c081bd5d7a16053d 100644 (file)
--- a/io_uring/memmap.c
+++ b/io_uring/memmap.c
@@ -337,7 +337,7 @@ unsigned long io_uring_get_unmapped_area(struct file *filp, unsigned long addr,
 
        ptr = io_uring_validate_mmap_request(filp, pgoff);
        if (IS_ERR(ptr))
-               return -ENOMEM;
+               return PTR_ERR(ptr);
 
        /*
         * Some architectures have strong cache aliasing requirements.