===================================================== BUG: KMSAN: uninit-value in ___bpf_prog_run+0x7523/0x97a0 kernel/bpf/core.c:1585 CPU: 1 PID: 16721 Comm: syz-executor.3 Not tainted 5.8.0-rc5-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+0x1df/0x240 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_prog_run+0x7523/0x97a0 kernel/bpf/core.c:1585 __bpf_prog_run32+0x101/0x170 kernel/bpf/core.c:1681 bpf_dispatcher_nop_func include/linux/bpf.h:556 [inline] bpf_prog_run_pin_on_cpu include/linux/filter.h:597 [inline] seccomp_run_filters kernel/seccomp.c:272 [inline] __seccomp_filter+0x59e/0x2720 kernel/seccomp.c:817 __secure_computing+0x1fa/0x380 kernel/seccomp.c:950 syscall_trace_enter+0x63b/0xe10 arch/x86/entry/common.c:194 do_syscall_32_irqs_on arch/x86/entry/common.c:425 [inline] __do_fast_syscall_32+0x209/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7fa3549 Code: Bad RIP value. RSP: 002b:00000000f5d7d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000f5d7d0f4 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000000000e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:165 ___bpf_prog_run+0x6c64/0x97a0 kernel/bpf/core.c:1391 __bpf_prog_run32+0x101/0x170 kernel/bpf/core.c:1681 bpf_dispatcher_nop_func include/linux/bpf.h:556 [inline] bpf_prog_run_pin_on_cpu include/linux/filter.h:597 [inline] seccomp_run_filters kernel/seccomp.c:272 [inline] __seccomp_filter+0x59e/0x2720 kernel/seccomp.c:817 __secure_computing+0x1fa/0x380 kernel/seccomp.c:950 syscall_trace_enter+0x63b/0xe10 arch/x86/entry/common.c:194 do_syscall_32_irqs_on arch/x86/entry/common.c:425 [inline] __do_fast_syscall_32+0x209/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Local variable ----regs@__bpf_prog_run32 created at: __bpf_prog_run32+0x87/0x170 kernel/bpf/core.c:1681 __bpf_prog_run32+0x87/0x170 kernel/bpf/core.c:1681 =====================================================