CVE-2021-47652

In the Linux kernel, the following vulnerability has been resolved: video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe() I got a null-ptr-deref report: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... RIP: 0010:fb_destroy_modelist+0x38/0x100 ... Call Trace: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460 ... ret_from_fork+0x1f/0x30 If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will be called to destroy modelist in the error handling path. But modelist has not been initialized yet, so it will result in null-ptr-deref. Initialize modelist before calling fb_alloc_cmap() to fix this bug.

• linux linux kernel (>= 3.2 < 4.9.311) • linux linux kernel (>= 4.10 < 4.14.276) • linux linux kernel (>= 4.15 < 4.19.238) • linux linux kernel (>= 4.20 < 5.4.189) • linux linux kernel (>= 5.5 < 5.10.110) • linux linux kernel (>= 5.11 < 5.15.33) • linux linux kernel (>= 5.16 < 5.16.19) • linux linux kernel (>= 5.17 < 5.17.2)