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authorPavel Begunkov <asml.silence@gmail.com>2022-08-24 15:07:43 +0300
committerJens Axboe <axboe@kernel.dk>2022-08-25 16:52:30 +0300
commit581711c46612c1fd7f98960f9ad53f04fdb89853 (patch)
tree85f8e79206ecb8fd9425913e467c30ca46d76169 /io_uring/opdef.c
parent5916943943d19a854238d50d1fe2047467cbeb3c (diff)
downloadlinux-581711c46612c1fd7f98960f9ad53f04fdb89853.tar.xz
io_uring/net: save address for sendzc async execution
We usually copy all bits that a request needs from the userspace for async execution, so the userspace can keep them on the stack. However, send zerocopy violates this pattern for addresses and may reloads it e.g. from io-wq. Save the address if any in ->async_data as usual. Reported-by: Stefan Metzmacher <metze@samba.org> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/d7512d7aa9abcd36e9afe1a4d292a24cb2d157e5.1661342812.git.asml.silence@gmail.com [axboe: fold in incremental fix] Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/opdef.c')
-rw-r--r--io_uring/opdef.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/io_uring/opdef.c b/io_uring/opdef.c
index 72dd2b2d8a9d..41410126c1c6 100644
--- a/io_uring/opdef.c
+++ b/io_uring/opdef.c
@@ -478,13 +478,15 @@ const struct io_op_def io_op_defs[] = {
.pollout = 1,
.audit_skip = 1,
.ioprio = 1,
+ .manual_alloc = 1,
#if defined(CONFIG_NET)
+ .async_size = sizeof(struct io_async_msghdr),
.prep = io_sendzc_prep,
.issue = io_sendzc,
+ .prep_async = io_sendzc_prep_async,
#else
.prep = io_eopnotsupp_prep,
#endif
-
},
};