=====================================================
BUG: KMSAN: uninit-value in strnchr+0x90/0xd0 lib/string.c:387
 strnchr+0x90/0xd0 lib/string.c:387
 bpf_bprintf_prepare+0x1c2/0x23c0 kernel/bpf/helpers.c:829
 ____bpf_trace_printk kernel/trace/bpf_trace.c:385 [inline]
 bpf_trace_printk+0xec/0x3e0 kernel/trace/bpf_trace.c:375
 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997
 __bpf_prog_run32+0xb2/0xe0 kernel/bpf/core.c:2236
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
 bpf_trace_run2+0x116/0x300 kernel/trace/bpf_trace.c:2420
 __bpf_trace_tlb_flush+0x2c/0x40 include/trace/events/tlb.h:38
 trace_tlb_flush include/trace/events/tlb.h:38 [inline]
 switch_mm_irqs_off+0x9d2/0x1010 arch/x86/mm/tlb.c:642
 unuse_temporary_mm arch/x86/kernel/alternative.c:1832 [inline]
 __text_poke+0xb4e/0xfb0 arch/x86/kernel/alternative.c:1942
 text_poke arch/x86/kernel/alternative.c:1985 [inline]
 text_poke_bp_batch+0x17f/0x960 arch/x86/kernel/alternative.c:2293
 text_poke_flush arch/x86/kernel/alternative.c:2487 [inline]
 text_poke_finish+0x7d/0xd0 arch/x86/kernel/alternative.c:2494
 arch_jump_label_transform_apply+0x23/0x40 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x6af/0x6d0 kernel/jump_label.c:483
 jump_label_update+0x6a0/0x7a0 kernel/jump_label.c:829
 static_key_enable_cpuslocked+0x229/0x260 kernel/jump_label.c:205
 static_key_enable+0x23/0x30 kernel/jump_label.c:218
 tracepoint_add_func+0x1084/0x1280 kernel/tracepoint.c:361
 tracepoint_probe_register_prio_may_exist+0xa8/0xf0 kernel/tracepoint.c:482
 tracepoint_probe_register_may_exist include/linux/tracepoint.h:52 [inline]
 __bpf_probe_register kernel/trace/bpf_trace.c:2446 [inline]
 bpf_probe_register+0x201/0x250 kernel/trace/bpf_trace.c:2452
 bpf_raw_tp_link_attach+0x627/0x8a0 kernel/bpf/syscall.c:3865
 bpf_raw_tracepoint_open+0x485/0x8a0 kernel/bpf/syscall.c:3892
 __sys_bpf+0x5a6/0xd90 kernel/bpf/syscall.c:5702
 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5765 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765
 ia32_sys_call+0xf7e/0x40a0 arch/x86/include/generated/asm/syscalls_32.h:358
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb4/0x120 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Local variable stack created at:
 __bpf_prog_run32+0x43/0xe0 kernel/bpf/core.c:2236
 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
 __bpf_prog_run include/linux/filter.h:657 [inline]
 bpf_prog_run include/linux/filter.h:664 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline]
 bpf_trace_run2+0x116/0x300 kernel/trace/bpf_trace.c:2420

CPU: 1 PID: 8980 Comm: syz-executor.0 Not tainted 6.9.0-rc3-syzkaller-00208-g586b5dfb51b9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================