Hi, Moving from Linux 5.1 to 5.15 (not very helpful, I know), I'm now occasionally seeing this problem [1] during boot. Whether or not it happens seems to mostly be random. The kernel is patched with the experimental and out of tree SGX patches [2], but I am pretty sure they are not relevant here, since the modules aren't even loaded at this point. Any ideas what could cause this? Please let me know if I should provide additional debug info. Regards, Merlijn [1] > [ 10.256835] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP ARM > [ 10.264343] Modules linked in: > [ 10.267456] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.2-218694-g19b9514dd867-dirty #1 > [ 10.275787] Hardware name: Nokia RX-51 board > [ 10.280090] PC is at omap3_l3_app_irq+0x100/0x120 > [ 10.284851] LR is at __handle_irq_event_percpu+0x48/0x250 > [ 10.290313] pc : [<c05b0ac8>] lr : [<c019c2a4>] psr: 20030193 > [ 10.296600] sp : c0f01e10 ip : 3ccf0000 fp : c1834200 > [ 10.301879] r10: c0ff8760 r9 : c0ff8780 r8 : 0000001a > [ 10.307128] r7 : 00000000 r6 : 00080000 r5 : 00000000 r4 : f8000000 > [ 10.313720] r3 : 00080000 r2 : a3b464b6 r1 : 00000000 r0 : 00080000 > [ 10.320281] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none > [ 10.327575] Control: 10c5387d Table: 83398019 DAC: 00000051 > [ 10.333343] Register r0 information: non-paged memory > [ 10.338439] Register r1 information: NULL pointer > [ 10.343200] Register r2 information: non-paged memory > [ 10.348297] Register r3 information: non-paged memory > [ 10.353393] Register r4 information: 0-page vmalloc region starting at 0xf8000000 allocated at iotable_init+0x0/0xf4 > [ 10.364013] Register r5 information: NULL pointer > [ 10.368774] Register r6 information: non-paged memory > [ 10.373870] Register r7 information: NULL pointer > [ 10.378631] Register r8 information: non-paged memory > [ 10.383728] Register r9 information: non-slab/vmalloc memory > [ 10.389434] Register r10 information: non-slab/vmalloc memory > [ 10.395233] Register r11 information: slab kmalloc-256 start c1834200 pointer offset 0 size 256 > [ 10.404022] Register r12 information: non-paged memory > [ 10.409210] Process swapper/0 (pid: 0, stack limit = 0x(ptrval)) > [ 10.415283] Stack: (0xc0f01e10 to 0xc0f02000) > [ 10.419677] 1e00: c0627a10 c1fc5d80 c0f04dc8 c1a47500 > [ 10.427917] 1e20: c0f04dc8 00000000 c0f01e68 0000001a c0ff8780 c019c2a4 00000000 a3b464b6 > [ 10.436157] 1e40: 625a0000 c1834200 c0f04dc8 00000000 c1805a00 0000000a c0f01ec0 63597fc0 > [ 10.444396] 1e60: 00000002 c019c4d4 00000000 a3b464b6 c1834200 c183426c 00000000 c019c55c > [ 10.452636] 1e80: c1834200 c183426c 00000000 c01a0d60 c0e6d5b0 00000000 00000000 c019bba8 > [ 10.460876] 1ea0: c07af038 20030013 ffffffff c0f01ef4 cfb63a78 c0f00000 63597fc0 c0100b3c > [ 10.469116] 1ec0: 00000000 c0f0b798 ffffe000 0ecf6000 00000004 c0f0b618 00000000 00000004 > [ 10.477325] 1ee0: cfb63a78 c0ff94c0 63597fc0 00000002 00000001 c0f01f10 c07aef64 c07af038 > [ 10.485565] 1f00: 20030013 ffffffff 00000051 c07aef3c cfb63d70 cfb63a78 633d8f31 00000000 > [ 10.493804] 1f20: c0f01f73 00000002 61c16980 00000002 7aca1a80 cfb63a78 c0f0b618 00000004 > [ 10.502044] 1f40: c0f04e64 cfb63a78 c0f04dc8 c0f0b618 c0e6da70 c07af2fc ffffe000 c0f04e10 > [ 10.510284] 1f60: 00000001 c016e754 00000004 c0f04dc0 01000000 a3b464b6 c0f084ac 000000e4 > [ 10.518524] 1f80: c0e43a60 cfdff0d4 c0f04dc0 00000000 cfdff0c0 c0f084ac c0ccdbc8 c016eae8 > [ 10.526763] 1fa0: c1000068 c0e00f0c ffffffff ffffffff 00000000 c0e00598 00000000 c0f04dc8 > [ 10.535003] 1fc0: 00000000 c0e43a60 a3b16bb4 00000000 00000000 c0e00330 00000051 10c0387d > [ 10.543243] 1fe0: 000007a3 8249b600 411fc083 10c5387d 00000000 00000000 00000000 00000000 > [ 10.551483] [<c05b0ac8>] (omap3_l3_app_irq) from [<c019c2a4>] (__handle_irq_event_percpu+0x48/0x250) > [ 10.560699] [<c019c2a4>] (__handle_irq_event_percpu) from [<c019c4d4>] (handle_irq_event_percpu+0x28/0x78) > [ 10.570465] [<c019c4d4>] (handle_irq_event_percpu) from [<c019c55c>] (handle_irq_event+0x38/0x5c) > [ 10.579406] [<c019c55c>] (handle_irq_event) from [<c01a0d60>] (handle_level_irq+0xc0/0x14c) > [ 10.587829] [<c01a0d60>] (handle_level_irq) from [<c019bba8>] (handle_domain_irq+0x70/0xac) > [ 10.596282] [<c019bba8>] (handle_domain_irq) from [<c0100b3c>] (__irq_svc+0x5c/0x90) > [ 10.604095] Exception stack(0xc0f01ec0 to 0xc0f01f08) > [ 10.609191] 1ec0: 00000000 c0f0b798 ffffe000 0ecf6000 00000004 c0f0b618 00000000 00000004 > [ 10.617431] 1ee0: cfb63a78 c0ff94c0 63597fc0 00000002 00000001 c0f01f10 c07aef64 c07af038 > [ 10.625671] 1f00: 20030013 ffffffff > [ 10.629180] [<c0100b3c>] (__irq_svc) from [<c07af038>] (cpuidle_enter_state+0x258/0x4b8) > [ 10.637359] [<c07af038>] (cpuidle_enter_state) from [<c07af2fc>] (cpuidle_enter+0x50/0x54) > [ 10.645690] [<c07af2fc>] (cpuidle_enter) from [<c016e754>] (do_idle+0x224/0x284) > [ 10.653167] [<c016e754>] (do_idle) from [<c016eae8>] (cpu_startup_entry+0x18/0x20) > [ 10.660827] [<c016eae8>] (cpu_startup_entry) from [<c0e00f0c>] (start_kernel+0x5c8/0x6c8) > [ 10.669067] Code: e3c0003c e007100c e1903001 0affffc9 (e7f001f2) > [ 10.675231] ---[ end trace 737d680415879d80 ]--- > [ 10.679901] Kernel panic - not syncing: Fatal exception in interrupt > [ 10.686309] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- [2] https://github.com/tmlind/linux_openpvrsgx/commits/droid4-pending-pvr-omapdrm-v5.15
