CVE-2022-50317

In the Linux kernel, the following vulnerability has been resolved: drm/bridge: megachips: Fix a null pointer dereference bug When removing the module we will get the following warning: [ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered [ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130 [ 31.921825] Call Trace: [ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw] [ 31.923139] i2c_device_remove+0x181/0x1f0 The two bridges (stdp2690, stdp4028) do not probe at the same time, so the driver does not call ge_b850v3_resgiter() when probing, causing the driver to try to remove the object that has not been initialized. Fix this by checking whether both the bridges are probed.

• linux linux kernel (>= 4.14.263 < 4.14.296) • linux linux kernel (>= 4.19.226 < 4.19.262) • linux linux kernel (>= 5.4.174 < 5.4.220) • linux linux kernel (>= 5.10.94 < 5.10.150) • linux linux kernel (>= 5.15.17 < 5.15.75) • linux linux kernel (>= 5.16.3 < 5.19.17) • linux linux kernel (>= 6.0 < 6.0.3)