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io_uring-5.5-2020-01-22

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Merge tag 'io_uring-5.5-2020-01-22' of git://git.kernel.dk/linux-block

Pull io_uring fix from Jens Axboe:
 "This was supposed to have gone in last week, but due to a brain fart
  on my part, I forgot that we made this struct addition in the 5.5
  cycle. So here it is for 5.5, to prevent having a 32 vs 64-bit
  compatability issue with the files_update command"

* tag 'io_uring-5.5-2020-01-22' of git://git.kernel.dk/linux-block:
  io_uring: fix compat for IORING_REGISTER_FILES_UPDATE
This commit is contained in:
Linus Torvalds 2020-01-22 08:30:09 -08:00
commit dbab40bdb4
2 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/io_uring.c
View File

@ -4463,13 +4463,15 @@ static int io_sqe_files_update(struct io_ring_ctx *ctx, void __user *arg,
return -EINVAL;
if (copy_from_user(&up, arg, sizeof(up)))
return -EFAULT;
if (up.resv)
return -EINVAL;
if (check_add_overflow(up.offset, nr_args, &done))
return -EOVERFLOW;
if (done > ctx->nr_user_files)
return -EINVAL;
done = 0;
fds = (__s32 __user *) up.fds;
fds = u64_to_user_ptr(up.fds);
while (nr_args) {
struct fixed_file_table *table;
unsigned index;

3
include/uapi/linux/io_uring.h
View File

@ -178,7 +178,8 @@ struct io_uring_params {
struct io_uring_files_update {
__u32 offset;
__s32 *fds;
__u32 resv;
__aligned_u64 /* __s32 * */ fds;
};
#endif