block: fix overflow in blk_ioctl_discard()

mainline inclusion
from mainline-v6.9-rc3
commit 22d24a544b0d49bbcbd61c8c0eaf77d3c9297155
category: bugfix
bugzilla: 189755, https://gitee.com/openeuler/kernel/issues/I9K0H3

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=22d24a544b0d49bbcbd61c8c0eaf77d3c9297155



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There is no check for overflow of 'start + len' in blk_ioctl_discard().
Hung task occurs if submit an discard ioctl with the following param:
  start = 0x80000000000ff000, len = 0x8000000000fff000;
Add the overflow validation now.

Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240329012319.2034550-1-linan666@huaweicloud.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>

Conflict:
	block/ioctl.c
Signed-off-by: Li Nan <linan122@huawei.com>