CVE-2022-49741

In the Linux kernel, the following vulnerability has been resolved: fbdev: smscufx: fix error handling code in ufx_usb_probe The current error handling code in ufx_usb_probe have many unmatching issues, e.g., missing ufx_free_usb_list, destroy_modedb label should only include framebuffer_release, fb_dealloc_cmap only matches fb_alloc_cmap. My local syzkaller reports a memory leak bug: memory leak in ufx_usb_probe BUG: memory leak unreferenced object 0xffff88802f879580 (size 128): comm "kworker/0:7", pid 17416, jiffies 4295067474 (age 46.710s) hex dump (first 32 bytes): 80 21 7c 2e 80 88 ff ff 18 d0 d0 0c 80 88 ff ff .!|............. 00 d0 d0 0c 80 88 ff ff e0 ff ff ff 0f 00 00 00 ................ backtrace: [ ] kmalloc_trace+0x20/0x90 mm/slab_common.c:1045 [ ] kmalloc include/linux/slab.h:553 [inline] [ ] kzalloc include/linux/slab.h:689 [inline] [ ] ufx_alloc_urb_list drivers/video/fbdev/smscufx.c:1873 [inline] [ ] ufx_usb_probe+0x11c/0x15a0 drivers/video/fbdev/smscufx.c:1655 [ ] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [ ] call_driver_probe drivers/base/dd.c:560 [inline] [ ] really_probe+0x12d/0x390 drivers/base/dd.c:639 [ ] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778 [ ] driver_probe_device+0x2a/0x120 drivers/base/dd.c:808 [ ] __device_attach_driver+0xf7/0x150 drivers/base/dd.c:936 [ ] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427 [ ] __device_attach+0x105/0x2d0 drivers/base/dd.c:1008 [ ] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487 [ ] device_add+0x642/0xdc0 drivers/base/core.c:3517 [ ] usb_set_configuration+0x8ef/0xb80 drivers/usb/core/message.c:2170 [ ] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [ ] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [ ] call_driver_probe drivers/base/dd.c:560 [inline] [ ] really_probe+0x12d/0x390 drivers/base/dd.c:639 [ ] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778 Fix this bug by rewriting the error handling code in ufx_usb_probe.