===================================================== BUG: KMSAN: uninit-value in ___bpf_prog_run+0x89a6/0x97a0 kernel/bpf/core.c:1587 CPU: 1 PID: 12339 Comm: syz-executor.4 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+0x89a6/0x97a0 kernel/bpf/core.c:1587 __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_64+0x54/0x150 arch/x86/entry/common.c:382 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45f01a Code: Bad RIP value. RSP: 002b:00007f964141ac58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e4 RAX: ffffffffffffffda RBX: 00000000004d6388 RCX: 000000000045f01a RDX: 000000000003ffff RSI: 00007f964141ac60 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000e R13: 0000000000c9fb6f R14: 000000000078bf00 R15: 000000000078bf0c 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_64+0x54/0x150 arch/x86/entry/common.c:382 entry_SYSCALL_64_after_hwframe+0x44/0xa9 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_64+0x54/0x150 arch/x86/entry/common.c:382 entry_SYSCALL_64_after_hwframe+0x44/0xa9 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 =====================================================