------------[ cut here ]------------ WARNING: CPU: 0 PID: 15667 at kernel/bpf/helpers.c:781 bpf_try_get_buffers kernel/bpf/helpers.c:781 [inline] WARNING: CPU: 0 PID: 15667 at kernel/bpf/helpers.c:781 bpf_bprintf_prepare+0x12cf/0x13a0 kernel/bpf/helpers.c:834 Modules linked in: CPU: 0 UID: 0 PID: 15667 Comm: syz.2.2719 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:bpf_try_get_buffers kernel/bpf/helpers.c:781 [inline] RIP: 0010:bpf_bprintf_prepare+0x12cf/0x13a0 kernel/bpf/helpers.c:834 Code: ff e9 ce fe ff ff e8 10 ec e0 ff e9 be fe ff ff e8 06 ec e0 ff e9 b4 fe ff ff e8 fc eb e0 ff e9 aa fe ff ff e8 f2 eb e0 ff 90 <0f> 0b 90 65 ff 0d 87 1a 90 10 b8 f0 ff ff ff e9 17 ff ff ff e8 d8 RSP: 0018:ffffc90004e7f060 EFLAGS: 00010087 RAX: ffffffff81df2a9e RBX: ffffc90004e7f230 RCX: 0000000000080000 RDX: ffffc9001d7c8000 RSI: 00000000000684b7 RDI: 00000000000684b8 RBP: ffffc90004e7f190 R08: 0000000000585870 R09: 0000000000000005 R10: dffffc0000000000 R11: fffff520009cfe24 R12: dffffc0000000000 R13: 0000000000000004 R14: 0000000000000003 R15: 1ffff920009cfe46 FS: 00007f67560836c0(0000) GS:ffff88812613d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1a411f3f98 CR3: 000000008ec4c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline] bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362 bpf_prog_b1367f0be6c54012+0x39/0x3f bpf_dispatcher_nop_func include/linux/bpf.h:1350 [inline] __bpf_prog_run include/linux/filter.h:721 [inline] bpf_prog_run include/linux/filter.h:728 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline] bpf_trace_run1+0x27f/0x4b0 kernel/trace/bpf_trace.c:2115 __bpf_trace_rcu_utilization+0xa1/0xf0 include/trace/events/rcu.h:27 __do_trace_rcu_utilization include/trace/events/rcu.h:27 [inline] trace_rcu_utilization+0x1ad/0x1d0 include/trace/events/rcu.h:27 rcu_note_context_switch+0xc9/0x1140 kernel/rcu/tree_plugin.h:330 __schedule+0x35d/0x4cc0 kernel/sched/core.c:6814 preempt_schedule_notrace+0xd1/0x110 kernel/sched/core.c:7206 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:471 [inline] __do_trace_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline] trace_bpf_trace_printk+0x1c1/0x1d0 kernel/trace/bpf_trace.h:11 ____bpf_trace_printk kernel/trace/bpf_trace.c:379 [inline] bpf_trace_printk+0x11e/0x190 kernel/trace/bpf_trace.c:362 bpf_prog_bfbd7bf4bf171090+0x41/0x5a bpf_dispatcher_nop_func include/linux/bpf.h:1350 [inline] __bpf_prog_run include/linux/filter.h:721 [inline] bpf_prog_run include/linux/filter.h:728 [inline] bpf_prog_run_pin_on_cpu include/linux/filter.h:745 [inline] bpf_flow_dissect+0x225/0x720 net/core/flow_dissector.c:1024 bpf_prog_test_run_flow_dissector+0x37c/0x5c0 net/bpf/test_run.c:1414 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4688 __sys_bpf+0x562/0x860 kernel/bpf/syscall.c:6167 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline] __se_sys_bpf kernel/bpf/syscall.c:6257 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6257 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f675518f6c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6756083038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f67553e5fa0 RCX: 00007f675518f6c9 RDX: 0000000000000050 RSI: 0000200000000180 RDI: 000000000000000a RBP: 00007f6755211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f67553e6038 R14: 00007f67553e5fa0 R15: 00007ffda1096f88