diff options
| author | Eugene Syromiatnikov | 2022-04-06 13:55:33 +0200 |
|---|---|---|
| committer | Jens Axboe | 2022-04-07 11:17:47 -0600 |
| commit | 0f5e4b83b37a96e3643951588ed7176b9b187c0a (patch) | |
| tree | f568561a7ab01ace0efab7a031ca7392be2d3d85 /fs/io_uring.c | |
| parent | cb318216732579da80202fe3e622a504e55b3a0f (diff) | |
io_uring: implement compat handling for IORING_REGISTER_IOWQ_AFF
Similarly to the way it is done im mbind syscall.
Cc: stable@vger.kernel.org # 5.14
Fixes: fe76421d1da1dcdb ("io_uring: allow user configurable IO thread CPU affinity")
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 60d6ac21519d..a88eca3e0902 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -11472,7 +11472,15 @@ static __cold int io_register_iowq_aff(struct io_ring_ctx *ctx, if (len > cpumask_size()) len = cpumask_size(); - if (copy_from_user(new_mask, arg, len)) { + if (in_compat_syscall()) { + ret = compat_get_bitmap(cpumask_bits(new_mask), + (const compat_ulong_t __user *)arg, + len * 8 /* CHAR_BIT */); + } else { + ret = copy_from_user(new_mask, arg, len); + } + + if (ret) { free_cpumask_var(new_mask); return -EFAULT; } |