===================================================== BUG: KMSAN: uninit-value in ____bpf_trace_printk kernel/trace/bpf_trace.c:343 [inline] BUG: KMSAN: uninit-value in bpf_trace_printk+0x160/0x1380 kernel/trace/bpf_trace.c:328 CPU: 0 PID: 22336 Comm: syz-executor.0 Not tainted 5.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 ____bpf_trace_printk kernel/trace/bpf_trace.c:343 [inline] bpf_trace_printk+0x160/0x1380 kernel/trace/bpf_trace.c:328 bpf_prog_0605f9f479290f07+0x36/0x1c8 bpf_dispatcher_nop_func include/linux/bpf.h:545 [inline] bpf_test_run+0x60c/0xe50 net/bpf/test_run.c:49 bpf_prog_test_run_skb+0xe69/0x27c0 net/bpf/test_run.c:438 bpf_prog_test_run kernel/bpf/syscall.c:2769 [inline] __do_sys_bpf+0xb923/0x155f0 kernel/bpf/syscall.c:3726 __se_sys_bpf+0x8e/0xa0 kernel/bpf/syscall.c:3666 __ia32_sys_bpf+0x4a/0x70 kernel/bpf/syscall.c:3666 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline] do_fast_syscall_32+0x3bf/0x6d0 arch/x86/entry/common.c:398 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fd0dd9 Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f5dcb0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 000000000000000a RCX: 0000000020000040 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Local variable ----sample.i@event_sched_in created at: perf_log_itrace_start kernel/events/core.c:8637 [inline] event_sched_in+0x1212/0x2e50 kernel/events/core.c:2511 perf_log_itrace_start kernel/events/core.c:8637 [inline] event_sched_in+0x1212/0x2e50 kernel/events/core.c:2511 =====================================================