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| author | Eugene Syromiatnikov <esyr@redhat.com> | 2022-04-29 16:22:18 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-04-29 08:39:43 -0600 |
| commit | 303cc749c8659d5f1ccf97973591313ec0bdacd3 (patch) | |
| tree | 38f0530dc123bfb1ea423537ab422eee8dc7e9e6 | |
| parent | 32452a3eb8b64e01e2be717f518c0be046975b9d (diff) | |
| download | linux-303cc749c8659d5f1ccf97973591313ec0bdacd3.tar.bz2 | |
io_uring: check that data field is 0 in ringfd unregister
Only allow data field to be 0 in struct io_uring_rsrc_update user
arguments to allow for future possible usage.
Fixes: e7a6c00dc77a ("io_uring: add support for registering ring file descriptors")
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Link: https://lore.kernel.org/r/20220429142218.GA28696@asgard.redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index e3ae26ff5d1a..e01f595f5b7d 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -10593,7 +10593,7 @@ static int io_ringfd_unregister(struct io_ring_ctx *ctx, void __user *__arg, ret = -EFAULT; break; } - if (reg.resv || reg.offset >= IO_RINGFD_REG_MAX) { + if (reg.resv || reg.data || reg.offset >= IO_RINGFD_REG_MAX) { ret = -EINVAL; break; } |