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authorPavel Begunkov <asml.silence@gmail.com>2024-03-06 17:02:25 +0100
committerJens Axboe <axboe@kernel.dk>2024-03-07 14:30:33 +0100
commit70581dcd0601a09f134f23268e3374e15d736824 (patch)
tree2dd5b227331fe7964ad43bfc0d4069a456a0fd8d
parentio_uring/net: fix overflow check in io_recvmsg_mshot_prep() (diff)
downloadlinux-70581dcd0601a09f134f23268e3374e15d736824.tar.xz
linux-70581dcd0601a09f134f23268e3374e15d736824.zip
io_uring: fix mshot read defer taskrun cqe posting
We can't post CQEs from io-wq with DEFER_TASKRUN set, normal completions are handled but aux should be explicitly disallowed by opcode handlers. Cc: stable@vger.kernel.org Fixes: fc68fcda04910 ("io_uring/rw: add support for IORING_OP_READ_MULTISHOT") Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/6fb7cba6f5366da25f4d3eb95273f062309d97fa.1709740837.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--io_uring/rw.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/io_uring/rw.c b/io_uring/rw.c
index 6f465b6b5dde..7733449271f2 100644
--- a/io_uring/rw.c
+++ b/io_uring/rw.c
@@ -933,6 +933,8 @@ int io_read_mshot(struct io_kiocb *req, unsigned int issue_flags)
*/
if (!io_file_can_poll(req))
return -EBADFD;
+ if (issue_flags & IO_URING_F_IOWQ)
+ return -EAGAIN;
ret = __io_read(req, issue_flags);