BUG: unable to handle page fault for address: fffffffffffff6e8 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD c779067 P4D c779067 PUD c77b067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 27903 Comm: syz-executor.3 Not tainted 6.5.0-rc2-syzkaller-00619-g25ad10658dc1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:strnchr+0x31/0x80 lib/string.c:403 Code: fe 48 bb 00 00 00 00 00 fc ff df 48 83 ec 18 eb 28 48 89 f8 48 89 f9 48 c1 e8 03 83 e1 07 0f b6 04 18 38 c8 7f 04 84 c0 75 25 <0f> b6 07 38 d0 74 15 48 83 c7 01 84 c0 74 05 48 39 f7 75 d3 48 83 RSP: 0018:ffffc900033bf4b8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: fffffffffffff6eb RDI: fffffffffffff6e8 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000000 R12: fffffffffffff6e8 R13: ffffc900033bf620 R14: ffffc90006a23000 R15: 0000000000000003 FS: 00007fbb5011c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffff6e8 CR3: 000000007aa24000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: bpf_bprintf_prepare+0x127/0x1490 kernel/bpf/helpers.c:823 ____bpf_trace_printk kernel/trace/bpf_trace.c:385 [inline] bpf_trace_printk+0xdb/0x180 kernel/trace/bpf_trace.c:375 bpf_prog_ebeed182d92b487f+0x38/0x3c bpf_dispatcher_nop_func include/linux/bpf.h:1180 [inline] __bpf_prog_run include/linux/filter.h:609 [inline] bpf_prog_run include/linux/filter.h:616 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2269 [inline] bpf_trace_run1+0x148/0x400 kernel/trace/bpf_trace.c:2307 __bpf_trace_rcu_utilization+0x8e/0xc0 include/trace/events/rcu.h:27 trace_rcu_utilization+0xcd/0x120 include/trace/events/rcu.h:27 rcu_note_context_switch+0x6c/0x1ac0 kernel/rcu/tree_plugin.h:318 __schedule+0x293/0x59f0 kernel/sched/core.c:6610 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7022 irqentry_exit+0x35/0x80 kernel/entry/common.c:433 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:rcu_read_lock_sched include/linux/rcupdate.h:839 [inline] RIP: 0010:fd_install+0x4f/0x6f0 fs/file.c:607 Code: 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 19 06 00 00 bf 01 00 00 00 48 8b ad e0 08 00 00 bc 6a 67 ff e8 87 0a 94 ff 45 31 c9 45 31 c0 31 d2 31 f6 b9 02 RSP: 0018:ffffc900033bfb48 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000005 RCX: ffffc90006a23000 RDX: 1ffff1100af0ec44 RSI: ffffffff81f27de1 RDI: 0000000000000001 RBP: ffff8880177c5e00 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8eabb517 R11: 0000000000000000 R12: ffff88801a3edb80 R13: 0000000000000000 R14: ffff8880789a2f00 R15: 0000000000000193 bpf_link_settle kernel/bpf/syscall.c:2992 [inline] bpf_raw_tp_link_attach+0x36d/0x610 kernel/bpf/syscall.c:3632 bpf_raw_tracepoint_open kernel/bpf/syscall.c:3653 [inline] __sys_bpf+0x31a/0x4ec0 kernel/bpf/syscall.c:5387 __do_sys_bpf kernel/bpf/syscall.c:5449 [inline] __se_sys_bpf kernel/bpf/syscall.c:5447 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5447 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fbb4f47cae9 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:00007fbb5011c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fbb4f59bf80 RCX: 00007fbb4f47cae9 RDX: 0000000000000010 RSI: 0000000020000180 RDI: 0000000000000011 RBP: 00007fbb4f4c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fbb4f59bf80 R15: 00007ffc3158f938 Modules linked in: CR2: fffffffffffff6e8 ---[ end trace 0000000000000000 ]--- RIP: 0010:strnchr+0x31/0x80 lib/string.c:403 Code: fe 48 bb 00 00 00 00 00 fc ff df 48 83 ec 18 eb 28 48 89 f8 48 89 f9 48 c1 e8 03 83 e1 07 0f b6 04 18 38 c8 7f 04 84 c0 75 25 <0f> b6 07 38 d0 74 15 48 83 c7 01 84 c0 74 05 48 39 f7 75 d3 48 83 RSP: 0018:ffffc900033bf4b8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: fffffffffffff6eb RDI: fffffffffffff6e8 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000000 R12: fffffffffffff6e8 R13: ffffc900033bf620 R14: ffffc90006a23000 R15: 0000000000000003 FS: 00007fbb5011c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffff6e8 CR3: 000000007aa24000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 7: fc ff df a: 48 83 ec 18 sub $0x18,%rsp e: eb 28 jmp 0x38 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f9 mov %rdi,%rcx 16: 48 c1 e8 03 shr $0x3,%rax 1a: 83 e1 07 and $0x7,%ecx 1d: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax 21: 38 c8 cmp %cl,%al 23: 7f 04 jg 0x29 25: 84 c0 test %al,%al 27: 75 25 jne 0x4e * 29: 0f b6 07 movzbl (%rdi),%eax <-- trapping instruction 2c: 38 d0 cmp %dl,%al 2e: 74 15 je 0x45 30: 48 83 c7 01 add $0x1,%rdi 34: 84 c0 test %al,%al 36: 74 05 je 0x3d 38: 48 39 f7 cmp %rsi,%rdi 3b: 75 d3 jne 0x10 3d: 48 rex.W 3e: 83 .byte 0x83