diff options
Diffstat (limited to 'fs/aio.c')
| -rw-r--r-- | fs/aio.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/aio.c b/fs/aio.c index 1c383bb44b2d..50a90e5581ed 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -46,6 +46,8 @@ #include "internal.h" +#define KIOCB_KEY 0 + #define AIO_RING_MAGIC 0xa10a10a1 #define AIO_RING_COMPAT_FEATURES 1 #define AIO_RING_INCOMPAT_FEATURES 0 @@ -1811,15 +1813,12 @@ COMPAT_SYSCALL_DEFINE3(io_submit, compat_aio_context_t, ctx_id, * Finds a given iocb for cancellation. */ static struct aio_kiocb * -lookup_kiocb(struct kioctx *ctx, struct iocb __user *iocb, u32 key) +lookup_kiocb(struct kioctx *ctx, struct iocb __user *iocb) { struct aio_kiocb *kiocb; assert_spin_locked(&ctx->ctx_lock); - if (key != KIOCB_KEY) - return NULL; - /* TODO: use a hash or array, this sucks. */ list_for_each_entry(kiocb, &ctx->active_reqs, ki_list) { if (kiocb->ki_user_iocb == iocb) @@ -1846,9 +1845,10 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, u32 key; int ret; - ret = get_user(key, &iocb->aio_key); - if (unlikely(ret)) + if (unlikely(get_user(key, &iocb->aio_key))) return -EFAULT; + if (unlikely(key != KIOCB_KEY)) + return -EINVAL; ctx = lookup_ioctx(ctx_id); if (unlikely(!ctx)) @@ -1856,7 +1856,7 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, spin_lock_irq(&ctx->ctx_lock); - kiocb = lookup_kiocb(ctx, iocb, key); + kiocb = lookup_kiocb(ctx, iocb); if (kiocb) ret = kiocb_cancel(kiocb); else |