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verifier backtracking bug
WARNING: CPU: 1 PID: 11313 at kernel/bpf/verifier.c:1782 __mark_chain_precision+0x22b2/0x23f0 kernel/bpf/verifier.c:1782
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 11313 Comm: syz-executor.2 Not tainted 5.3.0-rc1+ #49
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+0x1d8/0x2f8 lib/dump_stack.c:113
 panic+0x29b/0x7d9 kernel/panic.c:219
 __warn+0x22f/0x230 kernel/panic.c:576
 report_bug+0x190/0x290 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0xd7/0x440 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1026
RIP: 0010:__mark_chain_precision+0x22b2/0x23f0 kernel/bpf/verifier.c:1782
Code: 0f 8c 06 df ff ff e8 4d c0 29 00 e9 fc de ff ff e8 03 16 ef ff c6 05 01 d5 71 07 01 48 c7 c7 2f 4c 7e 88 31 c0 e8 be 2d c0 ff <0f> 0b e9 14 e1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 20 df ff
RSP: 0018:ffff88805fdcec80 EFLAGS: 00010246
RAX: afb2056a26ce1f00 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000a36f000 RSI: 0000000000009aba RDI: 0000000000009abb
RBP: ffff88805fdcee30 R08: ffff88808bf4ea90 R09: fffffbfff119a92f
R10: fffffbfff119a92f R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880a19f7ad0 R14: 0000000000000000 R15: 0000000000000002
 mark_chain_precision kernel/bpf/verifier.c:1819 [inline]
 check_cond_jmp_op kernel/bpf/verifier.c:5839 [inline]
 do_check+0x874d/0x22ea0 kernel/bpf/verifier.c:7781
 bpf_check+0x3f32/0xe9e0 kernel/bpf/verifier.c:9292
 bpf_prog_load kernel/bpf/syscall.c:1698 [inline]
 __do_sys_bpf+0x7d39/0xc1b0 kernel/bpf/syscall.c:2849
 __se_sys_bpf kernel/bpf/syscall.c:2808 [inline]
 __x64_sys_bpf+0x7a/0x90 kernel/bpf/syscall.c:2808
 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1ad72d6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1ad72d76d4
R13: 00000000004bfc7c R14: 00000000004d16d8 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..