BUG: unable to handle page fault for address: ffffffffffffff80 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 947c067 P4D 947c067 PUD 947e067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6948 Comm: syz-executor.4 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:test_cpu_buff_start kernel/trace/trace.c:3875 [inline] RIP: 0010:print_trace_fmt kernel/trace/trace.c:3897 [inline] RIP: 0010:print_trace_line+0xb60/0x1390 kernel/trace/trace.c:4077 Code: 44 24 20 42 8a 04 20 84 c0 0f 85 7f 07 00 00 48 8b 44 24 08 48 63 00 48 89 44 24 18 48 8d 2c c5 e0 a8 2d 89 48 89 e8 48 c1 e8 <03> 42 80 3c 20 00 74 0e 48 89 ef 49 89 d4 e8 8d 1d 3b 00 4c 89 e2 RSP: 0018:ffffc90001717f10 EFLAGS: 00010086 RAX: 0000000000000282 RBX: 0000000000004000 RCX: 4e6ec9bca7e9d800 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90001717f58 RBP: 0000000000000000 R08: ffffffff817a2e80 R09: fffffbfff174a363 R10: fffffbfff174a363 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffc90001717f58 R15: ffff888095af4480 FS: 0000000001ee2940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffff80 CR3: 00000000a01ce000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: CR2: ffffffffffffff80 ---[ end trace 96e75d246a7873b0 ]--- RIP: 0010:test_cpu_buff_start kernel/trace/trace.c:3875 [inline] RIP: 0010:print_trace_fmt kernel/trace/trace.c:3897 [inline] RIP: 0010:print_trace_line+0xb60/0x1390 kernel/trace/trace.c:4077 Code: 44 24 20 42 8a 04 20 84 c0 0f 85 7f 07 00 00 48 8b 44 24 08 48 63 00 48 89 44 24 18 48 8d 2c c5 e0 a8 2d 89 48 89 e8 48 c1 e8 <03> 42 80 3c 20 00 74 0e 48 89 ef 49 89 d4 e8 8d 1d 3b 00 4c 89 e2 RSP: 0018:ffffc90001717f10 EFLAGS: 00010086 RAX: 0000000000000282 RBX: 0000000000004000 RCX: 4e6ec9bca7e9d800 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90001717f58 RBP: 0000000000000000 R08: ffffffff817a2e80 R09: fffffbfff174a363 R10: fffffbfff174a363 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffc90001717f58 R15: ffff888095af4480 FS: 0000000001ee2940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffff80 CR3: 00000000a01ce000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400