syzbot

verifier bug: REG INVARIANTS VIOLATION (false_reg1): range bounds violation u64=[0xfffffffefffff630, 0xffffffff00000000] s64=[0xfffffffefffff630, 0xffffffff00000000] u32=[0x30, 0x8000050] s32=[0x30, 0x0] var_off=(0xfffffffe00000030, 0x10fffffc0)(1)
WARNING: CPU: 1 PID: 6031 at kernel/bpf/verifier.c:2722 reg_bounds_sanity_check+0x62b/0x1200 kernel/bpf/verifier.c:2722
Modules linked in:
CPU: 1 UID: 0 PID: 6031 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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 76 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:ffffc900043af2f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: fffffffefffff630 RCX: ffffffff817a3388
RDX: ffff88802ab90000 RSI: ffffffff817a3395 RDI: 0000000000000001
RBP: ffffc900043af3f0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880756a0000
R13: ffff888023fb01bc R14: ffff888023fb01b4 R15: ffff888023fb0168
FS:  00005555645e7500(0000) GS:ffff8881247b6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8dcc7c7dac CR3: 00000000753db000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 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+0x19b0/0x72d0 kernel/bpf/verifier.c:16768
 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: 0033:0x7f8dcc58ebe9
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:00007ffc501e4a78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8dcc7c5fa0 RCX: 00007f8dcc58ebe9
RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005
RBP: 00007f8dcc611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8dcc7c5fa0 R14: 00007f8dcc7c5fa0 R15: 0000000000000003
 </TASK>