Hi, I notice a regression report on bugzilla ([1]). As many developers don't keep an eye on it, I decide to forward it by email.
Quoting from it: > darkbasic 2023-05-10 13:36:37 UTC > > I'm using Gentoo Linux on a Raptor CS Talos 2 ppc64le, GPU is an AMD RX 570. > So far the past dozen of kernels (up to 6.2.14) worked flawlessly, but with > 6.3.1 I don't get any video output and I get the following in journalctl: > > May 10 15:09:01 talos2 kernel: Kernel attempted to read user page (1128) - > exploit attempt? (uid: 0) > May 10 15:09:01 talos2 kernel: BUG: Unable to handle kernel data access on > read at 0x00001128 > May 10 15:09:01 talos2 kernel: Faulting instruction address: > 0xc00800000d1a805c > May 10 15:09:01 talos2 kernel: Oops: Kernel access of bad area, sig: 11 [#1] > May 10 15:09:01 talos2 kernel: LE PAGE_SIZE=4K MMU=Radix SMP NR_CPUS=512 NUMA > PowerNV > May 10 15:09:01 talos2 kernel: Modules linked in: rfkill(+) 8021q garp mrp > stp llc binfmt_misc amdgpu uvcvideo uvc videobuf2_vmalloc videobuf2_memops > gpu_sched snd_hda_codec_hdmi i2c_algo_bit at24(+) videobuf2_v4l2 > drm_ttm_helper regmap_i2c videobuf2_common ttm snd_usb_audio drm_di> > May 10 15:09:01 talos2 kernel: CPU: 0 PID: 188 Comm: kworker/0:3 Not tainted > 6.3.1-gentoo-dist #1 > May 10 15:09:01 talos2 kernel: Hardware name: T2P9S01 REV 1.01 POWER9 > 0x4e1202 opal:skiboot-9858186 PowerNV > May 10 15:09:01 talos2 kernel: Workqueue: events_long > drm_dp_check_and_send_link_address [drm_display_helper] > May 10 15:09:01 talos2 kernel: NIP: c00800000d1a805c LR: c00800000d1a8018 > CTR: c000000000c87900 > May 10 15:09:01 talos2 kernel: REGS: c00000000beb3370 TRAP: 0300 Not > tainted (6.3.1-gentoo-dist) > May 10 15:09:01 talos2 kernel: MSR: 900000000280b033 > <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE> CR: 88048223 XER: 0000005a > May 10 15:09:01 talos2 kernel: CFAR: c000000000c87980 DAR: 0000000000001128 > DSISR: 40000000 IRQMASK: 0 > GPR00: c00800000d1a8018 c00000000beb3610 > c00800000d690f00 0000000000000000 > GPR04: 0000000000000002 c00800000d6297c0 > 0000000000000000 c00000002a00b740 > GPR08: 0000000000000000 0000000000001124 > 0000000000000000 c00800000d431560 > GPR12: c000000000c87900 c000000002a6b000 > c000000000170ad8 c00000001a460310 > GPR16: 0000000000000045 c000000022858388 > c000000026000340 0000000000000001 > GPR20: 0000000000000000 0000000000000001 > c0000000260001a0 0000000000004000 > GPR24: 0000000000004000 c000000026000010 > c0000000228580b8 fffffffffffffffd > GPR28: 0000000000000000 c0000000228580a0 > c000000022856000 c000000022858000 > May 10 15:09:01 talos2 kernel: NIP [c00800000d1a805c] > is_synaptics_cascaded_panamera+0x244/0x600 [amdgpu] > May 10 15:09:01 talos2 kernel: LR [c00800000d1a8018] > is_synaptics_cascaded_panamera+0x200/0x600 [amdgpu] > May 10 15:09:01 talos2 kernel: Call Trace: > May 10 15:09:01 talos2 kernel: [c00000000beb3610] [c00800000d1a8018] > is_synaptics_cascaded_panamera+0x200/0x600 [amdgpu] (unreliable) > May 10 15:09:01 talos2 kernel: [c00000000beb36d0] [c00800000b7c2b18] > drm_helper_probe_single_connector_modes+0x230/0x698 [drm_kms_helper] > May 10 15:09:01 talos2 kernel: [c00000000beb3810] [c000000000c57174] > drm_client_modeset_probe+0x2b4/0x16c0 > May 10 15:09:01 talos2 kernel: [c00000000beb3a10] [c00800000b7c7a30] > __drm_fb_helper_initial_config_and_unlock+0x68/0x640 [drm_kms_helper] > May 10 15:09:01 talos2 kernel: [c00000000beb3af0] [c00800000b7c5b08] > drm_fbdev_client_hotplug+0x40/0x1d0 [drm_kms_helper] > May 10 15:09:01 talos2 kernel: [c00000000beb3b70] [c000000000c55480] > drm_client_dev_hotplug+0x120/0x1b0 > May 10 15:09:01 talos2 kernel: [c00000000beb3c00] [c00800000b7c1130] > drm_kms_helper_hotplug_event+0x58/0x80 [drm_kms_helper] > May 10 15:09:01 talos2 kernel: [c00000000beb3c30] [c00800000b80b298] > drm_dp_check_and_send_link_address+0x330/0x3a0 [drm_display_helper] > May 10 15:09:01 talos2 kernel: [c00000000beb3cd0] [c000000000162d84] > process_one_work+0x2f4/0x580 > May 10 15:09:01 talos2 kernel: [c00000000beb3d70] [c0000000001630b8] > worker_thread+0xa8/0x600 > May 10 15:09:01 talos2 kernel: [c00000000beb3e00] [c000000000170bf4] > kthread+0x124/0x130 > May 10 15:09:01 talos2 kernel: [c00000000beb3e50] [c00000000000dd14] > ret_from_kernel_thread+0x5c/0x64 > May 10 15:09:01 talos2 kernel: --- interrupt: 0 at 0x0 > May 10 15:09:01 talos2 kernel: NIP: 0000000000000000 LR: 0000000000000000 > CTR: 0000000000000000 > May 10 15:09:01 talos2 kernel: REGS: c00000000beb3e80 TRAP: 0000 Not > tainted (6.3.1-gentoo-dist) > May 10 15:09:01 talos2 kernel: MSR: 0000000000000000 <> CR: 00000000 XER: > 00000000 > May 10 15:09:01 talos2 kernel: CFAR: 0000000000000000 IRQMASK: 0 > GPR00: 0000000000000000 c00000000beb4000 > 0000000000000000 0000000000000000 > GPR04: 0000000000000000 0000000000000000 > 0000000000000000 0000000000000000 > GPR08: 0000000000000000 0000000000000000 > 0000000000000000 0000000000000000 > GPR12: 0000000000000000 0000000000000000 > c000000000170ad8 c00000000a8fb240 > GPR16: 0000000000000000 0000000000000000 > 0000000000000000 0000000000000000 > GPR20: 0000000000000000 0000000000000000 > 0000000000000000 0000000000000000 > GPR24: 0000000000000000 0000000000000000 > 0000000000000000 0000000000000000 > GPR28: 0000000000000000 0000000000000000 > 0000000000000000 0000000000000000 > May 10 15:09:01 talos2 kernel: NIP [0000000000000000] 0x0 > May 10 15:09:01 talos2 kernel: LR [0000000000000000] 0x0 > May 10 15:09:01 talos2 kernel: --- interrupt: 0 > May 10 15:09:01 talos2 kernel: Code: 41820094 e91f0568 e95f0000 813f0088 > 81080030 3d4a0001 39290444 e94a7ca0 79291764 1d0811f0 7d4a4214 7d2a4a14 > <81290004> 91270074 813f0088 39290424 > May 10 15:09:01 talos2 kernel: ---[ end trace 0000000000000000 ]--- > May 10 15:09:01 talos2 kernel: at24 4-0054: supply vcc not found, using dummy > regulator See the report for details. Anyway, I'm adding this to regzbot: #regzbot introduced: v6.2..v6.3 https://bugzilla.kernel.org/show_bug.cgi?id=217427 #regzbot title: No video output from AMD RX 570 and kernel exploit attempt on ppc64le Thanks. [1]: https://bugzilla.kernel.org/show_bug.cgi?id=217427 -- An old man doll... just what I always wanted! - Clara
