diff options
author | Jakub Kicinski <kuba@kernel.org> | 2023-10-12 16:17:46 -0700 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2023-10-12 17:07:34 -0700 |
commit | 0e6bb5b7f4c8e6665e76bdafce37ad4a8daf83c5 (patch) | |
tree | 6f71fc5628f01bcf9d2dc6eceb3000ee4e73c79a /io_uring/io_uring.c | |
parent | 2f0968a030f2a5dd4897a0151c8395bf5babe5b0 (diff) | |
parent | e8c127b0576660da9195504fe8393fe9da3de9ce (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR.
No conflicts.
Adjacent changes:
kernel/bpf/verifier.c
829955981c55 ("bpf: Fix verifier log for async callback return values")
a923819fb2c5 ("bpf: Treat first argument as return value for bpf_throw")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'io_uring/io_uring.c')
-rw-r--r-- | io_uring/io_uring.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 783ed0fff71b..d839a80a6751 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2686,7 +2686,7 @@ static void *__io_uaddr_map(struct page ***pages, unsigned short *npages, { struct page **page_array; unsigned int nr_pages; - int ret; + int ret, i; *npages = 0; @@ -2716,6 +2716,20 @@ err: */ if (page_array[0] != page_array[ret - 1]) goto err; + + /* + * Can't support mapping user allocated ring memory on 32-bit archs + * where it could potentially reside in highmem. Just fail those with + * -EINVAL, just like we did on kernels that didn't support this + * feature. + */ + for (i = 0; i < nr_pages; i++) { + if (PageHighMem(page_array[i])) { + ret = -EINVAL; + goto err; + } + } + *pages = page_array; *npages = nr_pages; return page_to_virt(page_array[0]); |