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io_uring/kbuf: use mem_is_zero() 

Make use of mem_is_zero() for reserved fields checking.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/11fe27b7a831329bcdb4ea087317ef123ba7c171.1747150490.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
pull/1250/head
Pavel Begunkov 2025-05-13 18:26:47 +01:00 committed by Jens Axboe
parent 475a8d3037
commit 1724849072
1 changed files with 4 additions and 10 deletions
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14
io_uring/kbuf.c
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@ -602,8 +602,7 @@ int io_register_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg)
if (copy_from_user(&reg, arg, sizeof(reg)))
return -EFAULT;
if (reg.resv[0] || reg.resv[1] || reg.resv[2])
if (!mem_is_zero(reg.resv, sizeof(reg.resv)))
return -EINVAL;
if (reg.flags & ~(IOU_PBUF_RING_MMAP | IOU_PBUF_RING_INC))
return -EINVAL;
@ -679,9 +678,7 @@ int io_unregister_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg)
if (copy_from_user(&reg, arg, sizeof(reg)))
return -EFAULT;
if (reg.resv[0] || reg.resv[1] || reg.resv[2])
return -EINVAL;
if (reg.flags)
if (!mem_is_zero(reg.resv, sizeof(reg.resv)) || reg.flags)
return -EINVAL;
bl = io_buffer_get_list(ctx, reg.bgid);
@ -701,14 +698,11 @@ int io_register_pbuf_status(struct io_ring_ctx *ctx, void __user *arg)
{
struct io_uring_buf_status buf_status;
struct io_buffer_list *bl;
int i;
if (copy_from_user(&buf_status, arg, sizeof(buf_status)))
return -EFAULT;
for (i = 0; i < ARRAY_SIZE(buf_status.resv); i++)
if (buf_status.resv[i])
return -EINVAL;
if (!mem_is_zero(buf_status.resv, sizeof(buf_status.resv)))
return -EINVAL;
bl = io_buffer_get_list(ctx, buf_status.buf_group);
if (!bl)