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for-5.4/io_uring-2019-09-24

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Merge tag 'for-5.4/io_uring-2019-09-24' of git://git.kernel.dk/linux-block

Pull more io_uring updates from Jens Axboe:
 "A collection of later fixes and additions, that weren't quite ready
  for pushing out with the initial pull request.

  This contains:

   - Fix potential use-after-free of shadow requests (Jackie)

   - Fix potential OOM crash in request allocation (Jackie)

   - kmalloc+memcpy -> kmemdup cleanup (Jackie)

   - Fix poll crash regression (me)

   - Fix SQ thread not being nice and giving up CPU for !PREEMPT (me)

   - Add support for timeouts, making it easier to do epoll_wait()
     conversions, for instance (me)

   - Ensure io_uring works without f_ops->read_iter() and
     f_ops->write_iter() (me)"

* tag 'for-5.4/io_uring-2019-09-24' of git://git.kernel.dk/linux-block:
  io_uring: correctly handle non ->{read,write}_iter() file_operations
  io_uring: IORING_OP_TIMEOUT support
  io_uring: use cond_resched() in sqthread
  io_uring: fix potential crash issue due to io_get_req failure
  io_uring: ensure poll commands clear ->sqe
  io_uring: fix use-after-free of shadow_req
  io_uring: use kmemdup instead of kmalloc and memcpy
This commit is contained in:
Linus Torvalds 2019-09-24 16:40:21 -07:00
commit b6cb84b4fc
2 changed files with 219 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/uapi/linux/io_uring.h
View file

@ -28,6 +28,7 @@ struct io_uring_sqe {
__u16 poll_events;
__u32 sync_range_flags;
__u32 msg_flags;
__u32 timeout_flags;
};
__u64 user_data; /* data to be passed back at completion time */
union {
@ -61,6 +62,7 @@ struct io_uring_sqe {
#define IORING_OP_SYNC_FILE_RANGE 8
#define IORING_OP_SENDMSG 9
#define IORING_OP_RECVMSG 10
#define IORING_OP_TIMEOUT 11
/*
* sqe->fsync_flags