------------[ cut here ]------------ verifier bug: REG INVARIANTS VIOLATION (false_reg1): range bounds violation u64=[0x4000000, 0x0] s64=[0x4000000, 0x0] u32=[0x4000000, 0x0] s32=[0x4000000, 0x0] var_off=(0x0, 0x0)(1) WARNING: CPU: 0 PID: 19904 at kernel/bpf/verifier.c:2722 reg_bounds_sanity_check+0x62b/0x1200 kernel/bpf/verifier.c:2722 Modules linked in: CPU: 0 UID: 0 PID: 19904 Comm: syz.9.4141 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:reg_bounds_sanity_check+0x62b/0x1200 kernel/bpf/verifier.c:2722 Code: 45 ac 50 8b 45 b0 50 8b 45 b4 50 ff 75 b8 4c 8b 4d c0 4c 8b 45 c8 48 8b 95 58 ff ff ff 48 8b b5 60 ff ff ff e8 96 78 aa ff 90 <0f> 0b 90 90 48 8b 95 40 ff ff ff 48 83 c4 38 48 b8 00 00 00 00 00 RSP: 0018:ffffc900065072f8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000004000000 RCX: ffffc90029c65000 RDX: 0000000000080000 RSI: ffffffff817a3365 RDI: 0000000000000001 RBP: ffffc900065073f0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888055f38000 R13: ffff88802c20e324 R14: ffff88802c20e31c R15: ffff88802c20e2d0 FS: 00007f2c95ec16c0(0000) GS:ffff8880d66b9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001080 CR3: 00000000320fb000 CR4: 0000000000352ef0 DR0: 0000000000000003 DR1: 0000000000000009 DR2: 0000000000000101 DR3: 0000000000000005 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: reg_set_min_max kernel/bpf/verifier.c:16336 [inline] reg_set_min_max+0x1dc/0x2c0 kernel/bpf/verifier.c:16308 check_cond_jmp_op+0xc97/0x72d0 kernel/bpf/verifier.c:16779 do_check_insn kernel/bpf/verifier.c:19956 [inline] do_check kernel/bpf/verifier.c:20093 [inline] do_check_common+0xa13e/0xb410 kernel/bpf/verifier.c:23260 do_check_main kernel/bpf/verifier.c:23343 [inline] bpf_check+0x869f/0xc670 kernel/bpf/verifier.c:24703 bpf_prog_load+0xe41/0x2490 kernel/bpf/syscall.c:2979 __sys_bpf+0x4a3f/0x4de0 kernel/bpf/syscall.c:6029 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:6137 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2c94f8ebe9 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:00007f2c95ec1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f2c951b5fa0 RCX: 00007f2c94f8ebe9 RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005 RBP: 00007f2c95011e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2c951b6038 R14: 00007f2c951b5fa0 R15: 00007ffe621141f8