CVE-2023-53595

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

octeontx2-pf: mcs: Fix NULL pointer dereferences

When system is rebooted after creating macsec interface below NULL pointer dereference crashes occurred. This patch fixes those crashes by using correct order of teardown

[ 3324.406942] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 3324.415726] Mem abort info: [ 3324.418510] ESR = 0x96000006 [ 3324.421557] EC = 0x25: DABT (current EL), IL = 32 bits [ 3324.426865] SET = 0, FnV = 0 [ 3324.429913] EA = 0, S1PTW = 0 [ 3324.433047] Data abort info: [ 3324.435921] ISV = 0, ISS = 0x00000006 [ 3324.439748] CM = 0, WnR = 0 .... [ 3324.575915] Call trace: [ 3324.578353] cn10kmdodelsecy+0x24/0x180 [ 3324.582440] macseccommondellink+0xec/0x120 [ 3324.586788] macsecnotify+0x17c/0x1c0 [ 3324.590529] rawnotifiercallchain+0x50/0x70 [ 3324.594965] callnetdevicenotifiersinfo+0x34/0x7c [ 3324.599921] rollbackregisteredmany+0x354/0x5bc [ 3324.604616] unregisternetdevicequeue+0x88/0x10c [ 3324.609399] unregisternetdev+0x20/0x30 [ 3324.613313] otx2remove+0x8c/0x310 [ 3324.616794] pcideviceshutdown+0x30/0x70 [ 3324.620882] device_shutdown+0x11c/0x204

[ 966.664930] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 966.673712] Mem abort info: [ 966.676497] ESR = 0x96000006 [ 966.679543] EC = 0x25: DABT (current EL), IL = 32 bits [ 966.684848] SET = 0, FnV = 0 [ 966.687895] EA = 0, S1PTW = 0 [ 966.691028] Data abort info: [ 966.693900] ISV = 0, ISS = 0x00000006 [ 966.697729] CM = 0, WnR = 0 [ 966.833467] Call trace: [ 966.835904] cn10kmdostop+0x20/0xa0 [ 966.839557] macsecdevstop+0xe8/0x11c [ 966.843384] _devclosemany+0xbc/0x140 [ 966.847298] devclosemany+0x84/0x120 [ 966.851039] rollbackregisteredmany+0x114/0x5bc [ 966.855735] unregisternetdevicemany.part.0+0x14/0xa0 [ 966.860952] unregisternetdevicemany+0x18/0x24 [ 966.865560] macsecnotify+0x1ac/0x1c0 [ 966.869303] rawnotifiercallchain+0x50/0x70 [ 966.873738] callnetdevicenotifiersinfo+0x34/0x7c [ 966.878694] rollbackregisteredmany+0x354/0x5bc [ 966.883390] unregisternetdevicequeue+0x88/0x10c [ 966.888173] unregisternetdev+0x20/0x30 [ 966.892090] otx2remove+0x8c/0x310 [ 966.895571] pcideviceshutdown+0x30/0x70 [ 966.899660] deviceshutdown+0x11c/0x204 [ 966.903574] _dosysreboot+0x208/0x290 [ 966.907487] _arm64sysreboot+0x20/0x30 [ 966.911489] el0svchandler+0x80/0x1c0 [ 966.915316] el0svc+0x8/0x180 [ 966.918362] Code: f9400000 f9400a64 91220014 f94b3403 (f9400060) [ 966.924448] ---[ end trace 341778e799c3d8d7 ]---