BUG: unable to handle page fault for address: ffffffffff600000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD df36067 P4D df36067 PUD df38067 PMD df5b067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 PID: 5493 Comm: syz-executor.0 Not tainted 6.8.0-rc2-syzkaller-g60b4dfcda647 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:strncpy_from_kernel_nofault+0x8d/0x1d0 mm/maccess.c:91 Code: 00 48 89 d0 48 c1 e8 03 48 89 44 24 10 0f b6 04 28 84 c0 48 89 14 24 0f 85 d9 00 00 00 ff 02 45 31 f6 49 89 df 48 8b 54 24 08 <42> 8a 1c 33 4a 8d 3c 32 48 89 f8 48 c1 e8 03 49 89 ec 0f b6 04 28 RSP: 0018:ffffc9000574f658 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffffff600000 RCX: ffff88802b103b80 RDX: ffffc9000574f6e8 RSI: ffffffffff600000 RDI: ffffffffff600000 RBP: dffffc0000000000 R08: ffffffff8141ebcd R09: 1ffff11005620770 R10: dffffc0000000000 R11: ffffed1005620771 R12: ffffffffff600000 R13: 0000000000000008 R14: 0000000000000000 R15: ffffffffff600000 FS: 00007fb4a28a26c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 000000007bd0a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_probe_read_kernel_str_common kernel/trace/bpf_trace.c:266 [inline] ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:314 [inline] bpf_probe_read_compat_str+0x10e/0x180 kernel/trace/bpf_trace.c:307 bpf_prog_f17ebaf3f5f7baf8+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1235 [inline] __bpf_prog_run include/linux/filter.h:651 [inline] bpf_prog_run include/linux/filter.h:658 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline] bpf_trace_run4+0x25a/0x490 kernel/trace/bpf_trace.c:2422 trace_sched_switch include/trace/events/sched.h:222 [inline] __schedule+0x255b/0x49f0 kernel/sched/core.c:6724 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 futex_wait_queue+0x14d/0x1d0 kernel/futex/waitwake.c:370 __futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669 futex_wait+0x100/0x360 kernel/futex/waitwake.c:697 do_futex+0x33b/0x560 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x3f8/0x480 kernel/futex/syscalls.c:160 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fb4a1a7cda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb4a28a2178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fb4a1babf88 RCX: 00007fb4a1a7cda9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb4a1babf88 RBP: 00007fb4a1babf80 R08: 00007fb4a28a26c0 R09: 00007fb4a28a26c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb4a1babf8c R13: 000000000000000b R14: 00007fff9f4205c0 R15: 00007fff9f4206a8 Modules linked in: CR2: ffffffffff600000 ---[ end trace 0000000000000000 ]--- RIP: 0010:strncpy_from_kernel_nofault+0x8d/0x1d0 mm/maccess.c:91 Code: 00 48 89 d0 48 c1 e8 03 48 89 44 24 10 0f b6 04 28 84 c0 48 89 14 24 0f 85 d9 00 00 00 ff 02 45 31 f6 49 89 df 48 8b 54 24 08 <42> 8a 1c 33 4a 8d 3c 32 48 89 f8 48 c1 e8 03 49 89 ec 0f b6 04 28 RSP: 0018:ffffc9000574f658 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffffffffff600000 RCX: ffff88802b103b80 RDX: ffffc9000574f6e8 RSI: ffffffffff600000 RDI: ffffffffff600000 RBP: dffffc0000000000 R08: ffffffff8141ebcd R09: 1ffff11005620770 R10: dffffc0000000000 R11: ffffed1005620771 R12: ffffffffff600000 R13: 0000000000000008 R14: 0000000000000000 R15: ffffffffff600000 FS: 00007fb4a28a26c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 000000007bd0a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 48 89 add %cl,-0x77(%rax) 3: d0 48 c1 rorb -0x3f(%rax) 6: e8 03 48 89 44 call 0x4489480e b: 24 10 and $0x10,%al d: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax 11: 84 c0 test %al,%al 13: 48 89 14 24 mov %rdx,(%rsp) 17: 0f 85 d9 00 00 00 jne 0xf6 1d: ff 02 incl (%rdx) 1f: 45 31 f6 xor %r14d,%r14d 22: 49 89 df mov %rbx,%r15 25: 48 8b 54 24 08 mov 0x8(%rsp),%rdx * 2a: 42 8a 1c 33 mov (%rbx,%r14,1),%bl <-- trapping instruction 2e: 4a 8d 3c 32 lea (%rdx,%r14,1),%rdi 32: 48 89 f8 mov %rdi,%rax 35: 48 c1 e8 03 shr $0x3,%rax 39: 49 89 ec mov %rbp,%r12 3c: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax