CVE-2021-47647

In the Linux kernel, the following vulnerability has been resolved:

clk: qcom: ipq8074: fix PCI-E clock oops

Fix PCI-E clock related kernel oops that are caused by a missing clock parent.

pcie0rchngclksrc has numparents set to 2 but only one parent is actually set via parenthws, it should also have "XO" defined. This will cause the kernel to panic on a NULL pointer in clkcoregetparentbyindex().

So, to fix this utilize clkparentdata to provide gccxogpll0 parent data. Since there is already an existing static const char * const gccxogpll0[] used to provide the same parents via parentnames convert those users to clkparent_data as well.

Without this earlycon is needed to even catch the OOPS as it will reset the board before serial is initialized with the following:

[ 0.232279] Unable to handle kernel paging request at virtual address 0000a00000000000 [ 0.232322] Mem abort info: [ 0.239094] ESR = 0x96000004 [ 0.241778] EC = 0x25: DABT (current EL), IL = 32 bits [ 0.244908] SET = 0, FnV = 0 [ 0.250377] EA = 0, S1PTW = 0 [ 0.253236] FSC = 0x04: level 0 translation fault [ 0.256277] Data abort info: [ 0.261141] ISV = 0, ISS = 0x00000004 [ 0.264262] CM = 0, WnR = 0 [ 0.267820] [0000a00000000000] address between user and kernel address ranges [ 0.270954] Internal error: Oops: 96000004 [#1] SMP [ 0.278067] Modules linked in: [ 0.282751] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.15.10 #0 [ 0.285882] Hardware name: Xiaomi AX3600 (DT) [ 0.292043] pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 0.296299] pc : clkcoregetparentbyindex+0x68/0xec [ 0.303067] lr : _clkregister+0x1d8/0x820 [ 0.308273] sp : ffffffc01111b7d0 [ 0.312438] x29: ffffffc01111b7d0 x28: 0000000000000000 x27: 0000000000000040 [ 0.315919] x26: 0000000000000002 x25: 0000000000000000 x24: ffffff8000308800 [ 0.323037] x23: ffffff8000308850 x22: ffffff8000308880 x21: ffffff8000308828 [ 0.330155] x20: 0000000000000028 x19: ffffff8000309700 x18: 0000000000000020 [ 0.337272] x17: 000000005cc86990 x16: 0000000000000004 x15: ffffff80001d9d0a [ 0.344391] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000006 [ 0.351508] x11: 0000000000000003 x10: 0101010101010101 x9 : 0000000000000000 [ 0.358626] x8 : 7f7f7f7f7f7f7f7f x7 : 6468626f5e626266 x6 : 17000a3a403c1b06 [ 0.365744] x5 : 061b3c403a0a0017 x4 : 0000000000000000 x3 : 0000000000000001 [ 0.372863] x2 : 0000a00000000000 x1 : 0000000000000001 x0 : ffffff8000309700 [ 0.379982] Call trace: [ 0.387091] clkcoregetparentbyindex+0x68/0xec [ 0.389351] _clkregister+0x1d8/0x820 [ 0.394210] devmclkhwregister+0x5c/0xe0 [ 0.398030] devmclkregisterregmap+0x44/0x8c [ 0.402198] qcomccreallyprobe+0x17c/0x1d0 [ 0.406711] qcomccprobe+0x34/0x44 [ 0.411224] gccipq8074probe+0x18/0x30 [ 0.414869] platformprobe+0x68/0xe0 [ 0.418776] reallyprobe.part.0+0x9c/0x30c [ 0.422336] _driverprobedevice+0x98/0x144 [ 0.426329] driverprobedevice+0x44/0x11c [ 0.430842] _deviceattachdriver+0xb4/0x120 [ 0.434836] busforeachdrv+0x68/0xb0 [ 0.439349] _deviceattach+0xb0/0x170 [ 0.443081] deviceinitialprobe+0x14/0x20 [ 0.446901] busprobedevice+0x9c/0xa4 [ 0.451067] deviceadd+0x35c/0x834 [ 0.454886] ofdeviceadd+0x54/0x64 [ 0.458360] ofplatformdevicecreatepdata+0xc0/0x100 [ 0.462181] ofplatformbuscreate+0x114/0x370 [ 0.467128] ofplatformbuscreate+0x15c/0x370 [ 0.471641] ofplatformpopulate+0x50/0xcc [ 0.476155] ofplatformdefaultpopulateinit+0xa8/0xc8 [ 0.480324] dooneinitcall+0x50/0x1b0 [ 0.485877] kernelinitfreeable+0x234/0x29c [ 0.489436] kernelinit+0x24/0x120 [ 0.493948] retfromfork+0x10/0x20 [ 0.497253] Code: d50323bf d65f03c0 f94002a2 b4000302 (f9400042) [ 0.501079] ---[ end trace 4ca7e1129da2abce ]---