CVE-2023-54227

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> blk-mq: fix tags leak when shrink nr_hw_queues<br /> <br /> Although we don&amp;#39;t need to realloc set-&gt;tags[] when shrink nr_hw_queues,<br /> we need to free them. Or these tags will be leaked.<br /> <br /> How to reproduce:<br /> 1. mount -t configfs configfs /mnt<br /> 2. modprobe null_blk nr_devices=0 submit_queues=8<br /> 3. mkdir /mnt/nullb/nullb0<br /> 4. echo 1 &gt; /mnt/nullb/nullb0/power<br /> 5. echo 4 &gt; /mnt/nullb/nullb0/submit_queues<br /> 6. rmdir /mnt/nullb/nullb0<br /> <br /> In step 4, will alloc 9 tags (8 submit queues and 1 poll queue), then<br /> in step 5, new_nr_hw_queues = 5 (4 submit queues and 1 poll queue).<br /> At last in step 6, only these 5 tags are freed, the other 4 tags leaked.