CVE-2022-49522

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mmc: jz4740: Apply DMA engine limits to maximum segment size<br /> <br /> Do what is done in other DMA-enabled MMC host drivers (cf. host/mmci.c) and<br /> limit the maximum segment size based on the DMA engine&amp;#39;s capabilities. This<br /> is needed to avoid warnings like the following with CONFIG_DMA_API_DEBUG=y.<br /> <br /> ------------[ cut here ]------------<br /> WARNING: CPU: 0 PID: 21 at kernel/dma/debug.c:1162 debug_dma_map_sg+0x2f4/0x39c<br /> DMA-API: jz4780-dma 13420000.dma-controller: mapping sg segment longer than device claims to support [len=98304] [max=65536]<br /> CPU: 0 PID: 21 Comm: kworker/0:1H Not tainted 5.18.0-rc1 #19<br /> Workqueue: kblockd blk_mq_run_work_fn<br /> Stack : 81575aec 00000004 80620000 80620000 80620000 805e7358 00000009 801537ac<br /> 814c832c 806276e3 806e34b4 80620000 81575aec 00000001 81575ab8 09291444<br /> 00000000 00000000 805e7358 81575958 ffffffea 8157596c 00000000 636f6c62<br /> 6220646b 80387a70 0000000f 6d5f6b6c 80620000 00000000 81575ba4 00000009<br /> 805e170c 80896640 00000001 00010000 00000000 00000000 00006098 806e0000<br /> ...<br /> Call Trace:<br /> [] show_stack+0x84/0x120<br /> [] __warn+0xb8/0xec<br /> [] warn_slowpath_fmt+0x6c/0xb8<br /> [] debug_dma_map_sg+0x2f4/0x39c<br /> [] __dma_map_sg_attrs+0xf0/0x118<br /> [] dma_map_sg_attrs+0x14/0x28<br /> [] jz4740_mmc_prepare_dma_data+0x74/0xa4<br /> [] jz4740_mmc_pre_request+0x30/0x54<br /> [] mmc_blk_mq_issue_rq+0x6e0/0x7bc<br /> [] mmc_mq_queue_rq+0x220/0x2d4<br /> [] blk_mq_dispatch_rq_list+0x480/0x664<br /> [] blk_mq_do_dispatch_sched+0x2dc/0x370<br /> [] __blk_mq_sched_dispatch_requests+0xec/0x164<br /> [] blk_mq_sched_dispatch_requests+0x44/0x94<br /> [] __blk_mq_run_hw_queue+0xb0/0xcc<br /> [] process_one_work+0x1b8/0x264<br /> [] worker_thread+0x2ec/0x3b8<br /> [] kthread+0x104/0x10c<br /> [] ret_from_kernel_thread+0x14/0x1c<br /> <br /> ---[ end trace 0000000000000000 ]---