CVE-2023-53144

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> erofs: fix wrong kunmap when using LZMA on HIGHMEM platforms<br /> <br /> As the call trace shown, the root cause is kunmap incorrect pages:<br /> <br /> BUG: kernel NULL pointer dereference, address: 00000000<br /> CPU: 1 PID: 40 Comm: kworker/u5:0 Not tainted 6.2.0-rc5 #4<br /> Workqueue: erofs_worker z_erofs_decompressqueue_work<br /> EIP: z_erofs_lzma_decompress+0x34b/0x8ac<br /> z_erofs_decompress+0x12/0x14<br /> z_erofs_decompress_queue+0x7e7/0xb1c<br /> z_erofs_decompressqueue_work+0x32/0x60<br /> process_one_work+0x24b/0x4d8<br /> ? process_one_work+0x1a4/0x4d8<br /> worker_thread+0x14c/0x3fc<br /> kthread+0xe6/0x10c<br /> ? rescuer_thread+0x358/0x358<br /> ? kthread_complete_and_exit+0x18/0x18<br /> ret_from_fork+0x1c/0x28<br /> ---[ end trace 0000000000000000 ]---<br /> <br /> The bug is trivial and should be fixed now. It has no impact on<br /> !HIGHMEM platforms.