From: Li Lingfeng <lilingfeng3@huawei.com> Offering: HULK hulk inclusion category: feature bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6BTWC ------------------------------- This reverts commit f7dc15c2e9c4e56abb5a73c076f675e69d83585b. We need to apply patch 788d0824269bef (io_uring: import 5.15-stable io_uring) to move io_uring to separate directory and solve the problem of CVE-2023-0240. This patch can be reverted since patch 788d0824269bef contains it. Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com> Reviewed-by: Zhang Yi <yi.zhang@huawei.com> Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com> Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com> --- fs/io_uring.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 2397c2a1d919..472bcea45bc8 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1718,22 +1718,18 @@ static bool __io_cqring_overflow_flush(struct io_ring_ctx *ctx, bool force, return cqe != NULL; } -static bool io_cqring_overflow_flush(struct io_ring_ctx *ctx, bool force, +static void io_cqring_overflow_flush(struct io_ring_ctx *ctx, bool force, struct task_struct *tsk, struct files_struct *files) { - bool ret = true; - if (test_bit(0, &ctx->cq_check_overflow)) { /* iopoll syncs against uring_lock, not completion_lock */ if (ctx->flags & IORING_SETUP_IOPOLL) mutex_lock(&ctx->uring_lock); - ret = __io_cqring_overflow_flush(ctx, force, tsk, files); + __io_cqring_overflow_flush(ctx, force, tsk, files); if (ctx->flags & IORING_SETUP_IOPOLL) mutex_unlock(&ctx->uring_lock); } - - return ret; } static void __io_cqring_fill_event(struct io_kiocb *req, long res, @@ -7035,11 +7031,7 @@ static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events, iowq.nr_timeouts = atomic_read(&ctx->cq_timeouts); trace_io_uring_cqring_wait(ctx, min_events); do { - /* if we can't even flush overflow, don't wait for more */ - if (!io_cqring_overflow_flush(ctx, false, NULL, NULL)) { - ret = -EBUSY; - break; - } + io_cqring_overflow_flush(ctx, false, NULL, NULL); prepare_to_wait_exclusive(&ctx->wait, &iowq.wq, TASK_INTERRUPTIBLE); /* make sure we run task_work before checking for signals */ -- 2.25.1