verifier bug: REG INVARIANTS VIOLATION (true_reg1): range bounds violation u64=[0xffffdfcd, 0xffffffffffffdfcc] s64=[0x80000000ffffdfcd, 0x7fffffffffffdfcc] u32=[0xffffdfcd, 0xffffdfcc] s32=[0xffffdfcd, 0xffffdfcc] var_off=(0xffffdfcc, 0xffffffff00000000)
WARNING: kernel/bpf/verifier.c:2742 at reg_bounds_sanity_check+0x321/0x1360 kernel/bpf/verifier.c:2742, CPU#3: syz.0.12/6054
Modules linked in:
CPU: 3 UID: 0 PID: 6054 Comm: syz.0.12 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+0x361/0x1360 kernel/bpf/verifier.c:2742
Code: ff ff 50 8b 85 6c ff ff ff 50 8b 85 7c ff ff ff 50 8b 85 78 ff ff ff 50 ff 75 b8 4c 8b 4d c0 48 8b 95 70 ff ff ff 48 8b 75 80 <67> 48 0f b9 3a 48 8b 95 48 ff ff ff 48 83 c4 38 48 b8 00 00 00 00
RSP: 0018:ffffc90004f9f290 EFLAGS: 00010283
RAX: 00000000ffffdfcd RBX: ffff88804c68727c RCX: 00000000ffffdfcd
RDX: ffffffff8b95e300 RSI: ffffffff8b962fa0 RDI: ffffffff908cd4d0
RBP: ffffc90004f9f380 R08: ffffffffffffdfcc R09: 80000000ffffdfcd
R10: 00000000ffffdfcc R11: 0000000000000000 R12: 00000000ffffdfcd
R13: ffffffffffffdfcc R14: ffff88804c687284 R15: ffff88804c687230
FS:  0000000000000000(0000) GS:ffff8880979fc000(0063) knlGS:00000000f54a6b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c2b6f25 CR3: 000000006b65a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 reg_set_min_max kernel/bpf/verifier.c:16570 [inline]
 reg_set_min_max+0x18d/0x2d0 kernel/bpf/verifier.c:16537
 check_cond_jmp_op+0x277c/0x7890 kernel/bpf/verifier.c:17005
 do_check_insn kernel/bpf/verifier.c:20441 [inline]
 do_check kernel/bpf/verifier.c:20581 [inline]
 do_check_common+0xa4d3/0xc640 kernel/bpf/verifier.c:23865
 do_check_main kernel/bpf/verifier.c:23948 [inline]
 bpf_check+0x82aa/0xc820 kernel/bpf/verifier.c:25255
 bpf_prog_load+0x114e/0x2cc0 kernel/bpf/syscall.c:3088
 __sys_bpf+0x3e72/0x4980 kernel/bpf/syscall.c:6164
 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6272 [inline]
 __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:6272
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe8/0x680 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fb2579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f54a655c EFLAGS: 00000296 ORIG_RAX: 0000000000000165
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000080000140
RDX: 0000000000000049 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	50                   	push   %rax
   1:	8b 85 6c ff ff ff    	mov    -0x94(%rbp),%eax
   7:	50                   	push   %rax
   8:	8b 85 7c ff ff ff    	mov    -0x84(%rbp),%eax
   e:	50                   	push   %rax
   f:	8b 85 78 ff ff ff    	mov    -0x88(%rbp),%eax
  15:	50                   	push   %rax
  16:	ff 75 b8             	push   -0x48(%rbp)
  19:	4c 8b 4d c0          	mov    -0x40(%rbp),%r9
  1d:	48 8b 95 70 ff ff ff 	mov    -0x90(%rbp),%rdx
  24:	48 8b 75 80          	mov    -0x80(%rbp),%rsi
* 28:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2d:	48 8b 95 48 ff ff ff 	mov    -0xb8(%rbp),%rdx
  34:	48 83 c4 38          	add    $0x38,%rsp
  38:	48                   	rex.W
  39:	b8 00 00 00 00       	mov    $0x0,%eax