treewide: refresh kmalloc_obj() conversionsgrafted

This is another run of the Coccinelle script for converting kmalloc()
family of allocations to kmalloc_obj() via the existing rules in
scripts/coccinelle/api/kmalloc_objs.cocci

This catches both the set of kmalloc() uses added since the first
kmalloc_obj() conversions in v7.0 and adds a large group missed in the
first pass due to Coccinelle not interacting well with the cleanup.h
scoped_...() family of macros[1]. I worked around this with spatch's
"--macro-file" argument to a file with all the scoped_...() macros mapped
to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control
flow indicator I could find.

Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc,
riscv, and s390 with no new warnings.

Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1]
Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2]
Signed-off-by: Kees Cook <kees+treewide@kernel.org>

1 files changed, 586 insertions, 0 deletions

diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
new file mode 100644
index 000000000..896aab1ed
--- /dev/null
+++ b/io_uring/io_uring.h
@@ -0,0 +1,586 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef IOU_CORE_H
+#define IOU_CORE_H
+
+#include <linux/errno.h>
+#include <linux/file.h>
+#include <linux/lockdep.h>
+#include <linux/resume_user_mode.h>
+#include <linux/poll.h>
+#include <linux/io_uring_types.h>
+#include <uapi/linux/eventpoll.h>
+#include "alloc_cache.h"
+#include "io-wq.h"
+#include "slist.h"
+#include "tw.h"
+#include "opdef.h"
+
+#ifndef CREATE_TRACE_POINTS
+#include <trace/events/io_uring.h>
+#endif
+
+struct io_rings_layout {
+	/* size of CQ + headers + SQ offset array */
+	size_t rings_size;
+	size_t sq_size;
+
+	size_t sq_array_offset;
+};
+
+struct io_ctx_config {
+	struct io_uring_params p;
+	struct io_rings_layout layout;
+	struct io_uring_params __user *uptr;
+};
+
+#define IORING_FEAT_FLAGS (IORING_FEAT_SINGLE_MMAP |\
+			IORING_FEAT_NODROP |\
+			IORING_FEAT_SUBMIT_STABLE |\
+			IORING_FEAT_RW_CUR_POS |\
+			IORING_FEAT_CUR_PERSONALITY |\
+			IORING_FEAT_FAST_POLL |\
+			IORING_FEAT_POLL_32BITS |\
+			IORING_FEAT_SQPOLL_NONFIXED |\
+			IORING_FEAT_EXT_ARG |\
+			IORING_FEAT_NATIVE_WORKERS |\
+			IORING_FEAT_RSRC_TAGS |\
+			IORING_FEAT_CQE_SKIP |\
+			IORING_FEAT_LINKED_FILE |\
+			IORING_FEAT_REG_REG_RING |\
+			IORING_FEAT_RECVSEND_BUNDLE |\
+			IORING_FEAT_MIN_TIMEOUT |\
+			IORING_FEAT_RW_ATTR |\
+			IORING_FEAT_NO_IOWAIT)
+
+#define IORING_SETUP_FLAGS (IORING_SETUP_IOPOLL |\
+			IORING_SETUP_SQPOLL |\
+			IORING_SETUP_SQ_AFF |\
+			IORING_SETUP_CQSIZE |\
+			IORING_SETUP_CLAMP |\
+			IORING_SETUP_ATTACH_WQ |\
+			IORING_SETUP_R_DISABLED |\
+			IORING_SETUP_SUBMIT_ALL |\
+			IORING_SETUP_COOP_TASKRUN |\
+			IORING_SETUP_TASKRUN_FLAG |\
+			IORING_SETUP_SQE128 |\
+			IORING_SETUP_CQE32 |\
+			IORING_SETUP_SINGLE_ISSUER |\
+			IORING_SETUP_DEFER_TASKRUN |\
+			IORING_SETUP_NO_MMAP |\
+			IORING_SETUP_REGISTERED_FD_ONLY |\
+			IORING_SETUP_NO_SQARRAY |\
+			IORING_SETUP_HYBRID_IOPOLL |\
+			IORING_SETUP_CQE_MIXED |\
+			IORING_SETUP_SQE_MIXED |\
+			IORING_SETUP_SQ_REWIND)
+
+#define IORING_ENTER_FLAGS (IORING_ENTER_GETEVENTS |\
+			IORING_ENTER_SQ_WAKEUP |\
+			IORING_ENTER_SQ_WAIT |\
+			IORING_ENTER_EXT_ARG |\
+			IORING_ENTER_REGISTERED_RING |\
+			IORING_ENTER_ABS_TIMER |\
+			IORING_ENTER_EXT_ARG_REG |\
+			IORING_ENTER_NO_IOWAIT)
+
+
+#define SQE_VALID_FLAGS (IOSQE_FIXED_FILE |\
+			IOSQE_IO_DRAIN |\
+			IOSQE_IO_LINK |\
+			IOSQE_IO_HARDLINK |\
+			IOSQE_ASYNC |\
+			IOSQE_BUFFER_SELECT |\
+			IOSQE_CQE_SKIP_SUCCESS)
+
+#define IO_REQ_LINK_FLAGS (REQ_F_LINK | REQ_F_HARDLINK)
+
+/*
+ * Complaint timeout for io_uring cancelation exits, and for io-wq exit
+ * worker waiting.
+ */
+#define IO_URING_EXIT_WAIT_MAX	(HZ * 60 * 5)
+
+enum {
+	IOU_COMPLETE		= 0,
+
+	IOU_ISSUE_SKIP_COMPLETE	= -EIOCBQUEUED,
+
+	/*
+	 * The request has more work to do and should be retried. io_uring will
+	 * attempt to wait on the file for eligible opcodes, but otherwise
+	 * it'll be handed to iowq for blocking execution. It works for normal
+	 * requests as well as for the multi shot mode.
+	 */
+	IOU_RETRY		= -EAGAIN,
+
+	/*
+	 * Requeue the task_work to restart operations on this request. The
+	 * actual value isn't important, should just be not an otherwise
+	 * valid error code, yet less than -MAX_ERRNO and valid internally.
+	 */
+	IOU_REQUEUE		= -3072,
+};
+
+struct io_defer_entry {
+	struct list_head	list;
+	struct io_kiocb		*req;
+};
+
+struct io_wait_queue {
+	struct wait_queue_entry wq;
+	struct io_ring_ctx *ctx;
+	unsigned cq_tail;
+	unsigned cq_min_tail;
+	unsigned nr_timeouts;
+	int hit_timeout;
+	ktime_t min_timeout;
+	ktime_t timeout;
+	struct hrtimer t;
+
+#ifdef CONFIG_NET_RX_BUSY_POLL
+	ktime_t napi_busy_poll_dt;
+	bool napi_prefer_busy_poll;
+#endif
+};
+
+static inline struct io_rings *io_get_rings(struct io_ring_ctx *ctx)
+{
+	return rcu_dereference_check(ctx->rings_rcu,
+			lockdep_is_held(&ctx->uring_lock) ||
+			lockdep_is_held(&ctx->completion_lock));
+}
+
+static inline bool io_should_wake(struct io_wait_queue *iowq)
+{
+	struct io_ring_ctx *ctx = iowq->ctx;
+	struct io_rings *rings;
+	int dist;
+
+	guard(rcu)();
+	rings = io_get_rings(ctx);
+
+	/*
+	 * Wake up if we have enough events, or if a timeout occurred since we
+	 * started waiting. For timeouts, we always want to return to userspace,
+	 * regardless of event count.
+	 */
+	dist = READ_ONCE(rings->cq.tail) - (int) iowq->cq_tail;
+	return dist >= 0 || atomic_read(&ctx->cq_timeouts) != iowq->nr_timeouts;
+}
+
+#define IORING_MAX_ENTRIES	32768
+#define IORING_MAX_CQ_ENTRIES	(2 * IORING_MAX_ENTRIES)
+
+int io_prepare_config(struct io_ctx_config *config);
+
+bool io_cqe_cache_refill(struct io_ring_ctx *ctx, bool overflow, bool cqe32);
+void io_req_defer_failed(struct io_kiocb *req, s32 res);
+bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags);
+void io_add_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags);
+bool io_req_post_cqe(struct io_kiocb *req, s32 res, u32 cflags);
+bool io_req_post_cqe32(struct io_kiocb *req, struct io_uring_cqe src_cqe[2]);
+void __io_commit_cqring_flush(struct io_ring_ctx *ctx);
+
+unsigned io_linked_nr(struct io_kiocb *req);
+void io_req_track_inflight(struct io_kiocb *req);
+struct file *io_file_get_normal(struct io_kiocb *req, int fd);
+struct file *io_file_get_fixed(struct io_kiocb *req, int fd,
+			       unsigned issue_flags);
+struct file *io_uring_ctx_get_file(unsigned int fd, bool registered);
+
+void io_req_task_queue(struct io_kiocb *req);
+void io_req_task_complete(struct io_tw_req tw_req, io_tw_token_t tw);
+void io_req_task_queue_fail(struct io_kiocb *req, int ret);
+void io_req_task_submit(struct io_tw_req tw_req, io_tw_token_t tw);
+__cold void io_uring_drop_tctx_refs(struct task_struct *task);
+
+int io_ring_add_registered_file(struct io_uring_task *tctx, struct file *file,
+				     int start, int end);
+void io_queue_iowq(struct io_kiocb *req);
+
+int io_poll_issue(struct io_kiocb *req, io_tw_token_t tw);
+int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr);
+int io_do_iopoll(struct io_ring_ctx *ctx, bool force_nonspin);
+__cold void io_iopoll_try_reap_events(struct io_ring_ctx *ctx);
+void __io_submit_flush_completions(struct io_ring_ctx *ctx);
+
+struct io_wq_work *io_wq_free_work(struct io_wq_work *work);
+void io_wq_submit_work(struct io_wq_work *work);
+
+void io_free_req(struct io_kiocb *req);
+void io_queue_next(struct io_kiocb *req);
+void io_task_refs_refill(struct io_uring_task *tctx);
+bool __io_alloc_req_refill(struct io_ring_ctx *ctx);
+
+void io_activate_pollwq(struct io_ring_ctx *ctx);
+void io_restriction_clone(struct io_restriction *dst, struct io_restriction *src);
+void io_poison_req(struct io_kiocb *req);
+
+static inline void io_lockdep_assert_cq_locked(struct io_ring_ctx *ctx)
+{
+#if defined(CONFIG_PROVE_LOCKING)
+	lockdep_assert(in_task());
+
+	if (ctx->flags & IORING_SETUP_DEFER_TASKRUN)
+		lockdep_assert_held(&ctx->uring_lock);
+
+	if (ctx->flags & IORING_SETUP_IOPOLL) {
+		lockdep_assert_held(&ctx->uring_lock);
+	} else if (!(ctx->int_flags & IO_RING_F_TASK_COMPLETE)) {
+		lockdep_assert_held(&ctx->completion_lock);
+	} else if (ctx->submitter_task) {
+		/*
+		 * ->submitter_task may be NULL and we can still post a CQE,
+		 * if the ring has been setup with IORING_SETUP_R_DISABLED.
+		 * Not from an SQE, as those cannot be submitted, but via
+		 * updating tagged resources.
+		 */
+		if (!percpu_ref_is_dying(&ctx->refs))
+			lockdep_assert(current == ctx->submitter_task);
+	}
+#endif
+}
+
+static inline bool io_is_compat(struct io_ring_ctx *ctx)
+{
+	return IS_ENABLED(CONFIG_COMPAT) && unlikely(ctx->int_flags & IO_RING_F_COMPAT);
+}
+
+static inline void io_submit_flush_completions(struct io_ring_ctx *ctx)
+{
+	if (!wq_list_empty(&ctx->submit_state.compl_reqs) ||
+	    ctx->submit_state.cq_flush)
+		__io_submit_flush_completions(ctx);
+}
+
+#define io_for_each_link(pos, head) \
+	for (pos = (head); pos; pos = pos->link)
+
+static inline bool io_get_cqe_overflow(struct io_ring_ctx *ctx,
+					struct io_uring_cqe **ret,
+					bool overflow, bool cqe32)
+{
+	io_lockdep_assert_cq_locked(ctx);
+
+	if (unlikely(ctx->cqe_sentinel - ctx->cqe_cached < (cqe32 + 1))) {
+		if (unlikely(!io_cqe_cache_refill(ctx, overflow, cqe32)))
+			return false;
+	}
+	*ret = ctx->cqe_cached;
+	ctx->cached_cq_tail++;
+	ctx->cqe_cached++;
+	if (ctx->flags & IORING_SETUP_CQE32) {
+		ctx->cqe_cached++;
+	} else if (cqe32 && ctx->flags & IORING_SETUP_CQE_MIXED) {
+		ctx->cqe_cached++;
+		ctx->cached_cq_tail++;
+	}
+	WARN_ON_ONCE(ctx->cqe_cached > ctx->cqe_sentinel);
+	return true;
+}
+
+static inline bool io_get_cqe(struct io_ring_ctx *ctx, struct io_uring_cqe **ret,
+				bool cqe32)
+{
+	return io_get_cqe_overflow(ctx, ret, false, cqe32);
+}
+
+static inline bool io_defer_get_uncommited_cqe(struct io_ring_ctx *ctx,
+					       struct io_uring_cqe **cqe_ret)
+{
+	io_lockdep_assert_cq_locked(ctx);
+
+	ctx->submit_state.cq_flush = true;
+	return io_get_cqe(ctx, cqe_ret, ctx->flags & IORING_SETUP_CQE_MIXED);
+}
+
+static __always_inline bool io_fill_cqe_req(struct io_ring_ctx *ctx,
+					    struct io_kiocb *req)
+{
+	bool is_cqe32 = req->cqe.flags & IORING_CQE_F_32;
+	struct io_uring_cqe *cqe;
+
+	/*
+	 * If we can't get a cq entry, userspace overflowed the submission
+	 * (by quite a lot).
+	 */
+	if (unlikely(!io_get_cqe(ctx, &cqe, is_cqe32)))
+		return false;
+
+	memcpy(cqe, &req->cqe, sizeof(*cqe));
+	if (ctx->flags & IORING_SETUP_CQE32 || is_cqe32) {
+		memcpy(cqe->big_cqe, &req->big_cqe, sizeof(*cqe));
+		memset(&req->big_cqe, 0, sizeof(req->big_cqe));
+	}
+
+	if (trace_io_uring_complete_enabled())
+		trace_call__io_uring_complete(req->ctx, req, cqe);
+	return true;
+}
+
+static inline void req_set_fail(struct io_kiocb *req)
+{
+	req->flags |= REQ_F_FAIL;
+	if (req->flags & REQ_F_CQE_SKIP) {
+		req->flags &= ~REQ_F_CQE_SKIP;
+		req->flags |= REQ_F_SKIP_LINK_CQES;
+	}
+}
+
+static inline void io_req_set_res(struct io_kiocb *req, s32 res, u32 cflags)
+{
+	req->cqe.res = res;
+	req->cqe.flags = cflags;
+}
+
+static inline u32 ctx_cqe32_flags(struct io_ring_ctx *ctx)
+{
+	if (ctx->flags & IORING_SETUP_CQE_MIXED)
+		return IORING_CQE_F_32;
+	return 0;
+}
+
+static inline void io_req_set_res32(struct io_kiocb *req, s32 res, u32 cflags,
+				    __u64 extra1, __u64 extra2)
+{
+	req->cqe.res = res;
+	req->cqe.flags = cflags | ctx_cqe32_flags(req->ctx);
+	req->big_cqe.extra1 = extra1;
+	req->big_cqe.extra2 = extra2;
+}
+
+static inline void *io_uring_alloc_async_data(struct io_alloc_cache *cache,
+					      struct io_kiocb *req)
+{
+	if (cache) {
+		req->async_data = io_cache_alloc(cache, GFP_KERNEL);
+	} else {
+		const struct io_issue_def *def = &io_issue_defs[req->opcode];
+
+		WARN_ON_ONCE(!def->async_size);
+		req->async_data = kmalloc(def->async_size, GFP_KERNEL);
+	}
+	if (req->async_data)
+		req->flags |= REQ_F_ASYNC_DATA;
+	return req->async_data;
+}
+
+static inline bool req_has_async_data(struct io_kiocb *req)
+{
+	return req->flags & REQ_F_ASYNC_DATA;
+}
+
+static inline void io_req_async_data_clear(struct io_kiocb *req,
+					   io_req_flags_t extra_flags)
+{
+	req->flags &= ~(REQ_F_ASYNC_DATA|extra_flags);
+	req->async_data = NULL;
+}
+
+static inline void io_req_async_data_free(struct io_kiocb *req)
+{
+	kfree(req->async_data);
+	io_req_async_data_clear(req, 0);
+}
+
+static inline void io_put_file(struct io_kiocb *req)
+{
+	if (!(req->flags & REQ_F_FIXED_FILE) && req->file)
+		fput(req->file);
+}
+
+static inline void io_ring_submit_unlock(struct io_ring_ctx *ctx,
+					 unsigned issue_flags)
+{
+	lockdep_assert_held(&ctx->uring_lock);
+	if (unlikely(issue_flags & IO_URING_F_UNLOCKED))
+		mutex_unlock(&ctx->uring_lock);
+}
+
+static inline void io_ring_submit_lock(struct io_ring_ctx *ctx,
+				       unsigned issue_flags)
+{
+	/*
+	 * "Normal" inline submissions always hold the uring_lock, since we
+	 * grab it from the system call. Same is true for the SQPOLL offload.
+	 * The only exception is when we've detached the request and issue it
+	 * from an async worker thread, grab the lock for that case.
+	 */
+	if (unlikely(issue_flags & IO_URING_F_UNLOCKED))
+		mutex_lock(&ctx->uring_lock);
+	lockdep_assert_held(&ctx->uring_lock);
+}
+
+static inline void io_commit_cqring(struct io_ring_ctx *ctx)
+{
+	/* order cqe stores with ring update */
+	smp_store_release(&ctx->rings->cq.tail, ctx->cached_cq_tail);
+}
+
+static inline void __io_wq_wake(struct wait_queue_head *wq)
+{
+	/*
+	 *
+	 * Pass in EPOLLIN|EPOLL_URING_WAKE as the poll wakeup key. The latter
+	 * set in the mask so that if we recurse back into our own poll
+	 * waitqueue handlers, we know we have a dependency between eventfd or
+	 * epoll and should terminate multishot poll at that point.
+	 */
+	if (wq_has_sleeper(wq))
+		__wake_up(wq, TASK_NORMAL, 0, poll_to_key(EPOLL_URING_WAKE | EPOLLIN));
+}
+
+static inline void io_poll_wq_wake(struct io_ring_ctx *ctx)
+{
+	__io_wq_wake(&ctx->poll_wq);
+}
+
+static inline void io_cqring_wake(struct io_ring_ctx *ctx)
+{
+	/*
+	 * Trigger waitqueue handler on all waiters on our waitqueue. This
+	 * won't necessarily wake up all the tasks, io_should_wake() will make
+	 * that decision.
+	 */
+
+	__io_wq_wake(&ctx->cq_wait);
+}
+
+static inline bool __io_sqring_full(struct io_ring_ctx *ctx)
+{
+	struct io_rings *r = io_get_rings(ctx);
+
+	/*
+	 * SQPOLL must use the actual sqring head, as using the cached_sq_head
+	 * is race prone if the SQPOLL thread has grabbed entries but not yet
+	 * committed them to the ring. For !SQPOLL, this doesn't matter, but
+	 * since this helper is just used for SQPOLL sqring waits (or POLLOUT),
+	 * just read the actual sqring head unconditionally.
+	 */
+	return READ_ONCE(r->sq.tail) - READ_ONCE(r->sq.head) == ctx->sq_entries;
+}
+
+static inline bool io_sqring_full(struct io_ring_ctx *ctx)
+{
+	guard(rcu)();
+	return __io_sqring_full(ctx);
+}
+
+static inline unsigned int __io_sqring_entries(struct io_ring_ctx *ctx)
+{
+	struct io_rings *rings = io_get_rings(ctx);
+	unsigned int entries;
+
+	/* make sure SQ entry isn't read before tail */
+	entries = smp_load_acquire(&rings->sq.tail) - ctx->cached_sq_head;
+	return min(entries, ctx->sq_entries);
+}
+
+static inline unsigned int io_sqring_entries(struct io_ring_ctx *ctx)
+{
+	guard(rcu)();
+	return __io_sqring_entries(ctx);
+}
+
+/*
+ * Don't complete immediately but use deferred completion infrastructure.
+ * Protected by ->uring_lock and can only be used either with
+ * IO_URING_F_COMPLETE_DEFER or inside a tw handler holding the mutex.
+ */
+static inline void io_req_complete_defer(struct io_kiocb *req)
+	__must_hold(&req->ctx->uring_lock)
+{
+	struct io_submit_state *state = &req->ctx->submit_state;
+
+	lockdep_assert_held(&req->ctx->uring_lock);
+
+	wq_list_add_tail(&req->comp_list, &state->compl_reqs);
+}
+
+#define SHOULD_FLUSH_MASK	(IO_RING_F_OFF_TIMEOUT_USED | \
+				 IO_RING_F_HAS_EVFD | IO_RING_F_POLL_ACTIVATED)
+
+static inline void io_commit_cqring_flush(struct io_ring_ctx *ctx)
+{
+	if (unlikely(data_race(ctx->int_flags) & SHOULD_FLUSH_MASK))
+		__io_commit_cqring_flush(ctx);
+}
+
+static inline void io_get_task_refs(int nr)
+{
+	struct io_uring_task *tctx = current->io_uring;
+
+	tctx->cached_refs -= nr;
+	if (unlikely(tctx->cached_refs < 0))
+		io_task_refs_refill(tctx);
+}
+
+static inline bool io_req_cache_empty(struct io_ring_ctx *ctx)
+{
+	return !ctx->submit_state.free_list.next;
+}
+
+extern struct kmem_cache *req_cachep;
+
+static inline struct io_kiocb *io_extract_req(struct io_ring_ctx *ctx)
+{
+	struct io_kiocb *req;
+
+	req = container_of(ctx->submit_state.free_list.next, struct io_kiocb, comp_list);
+	wq_stack_extract(&ctx->submit_state.free_list);
+	return req;
+}
+
+static inline bool io_alloc_req(struct io_ring_ctx *ctx, struct io_kiocb **req)
+{
+	if (unlikely(io_req_cache_empty(ctx))) {
+		if (!__io_alloc_req_refill(ctx))
+			return false;
+	}
+	*req = io_extract_req(ctx);
+	return true;
+}
+
+static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res)
+{
+	io_req_set_res(req, res, 0);
+	req->io_task_work.func = io_req_task_complete;
+	io_req_task_work_add(req);
+}
+
+static inline bool io_file_can_poll(struct io_kiocb *req)
+{
+	if (req->flags & REQ_F_CAN_POLL)
+		return true;
+	if (req->file && file_can_poll(req->file)) {
+		req->flags |= REQ_F_CAN_POLL;
+		return true;
+	}
+	return false;
+}
+
+static inline bool io_is_uring_cmd(const struct io_kiocb *req)
+{
+	return req->opcode == IORING_OP_URING_CMD ||
+	       req->opcode == IORING_OP_URING_CMD128;
+}
+
+static inline ktime_t io_get_time(struct io_ring_ctx *ctx)
+{
+	if (ctx->clockid == CLOCK_MONOTONIC)
+		return ktime_get();
+
+	return ktime_get_with_offset(ctx->clock_offset);
+}
+
+enum {
+	IO_CHECK_CQ_OVERFLOW_BIT,
+	IO_CHECK_CQ_DROPPED_BIT,
+};
+
+static inline bool io_has_work(struct io_ring_ctx *ctx)
+{
+	return test_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq) ||
+	       io_local_work_pending(ctx);
+}
+#endif