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verifier backtracking bug
WARNING: CPU: 1 PID: 17124 at kernel/bpf/verifier.c:1785 __mark_chain_precision+0x19bb/0x1ee0 kernel/bpf/verifier.c:1785
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 17124 Comm: syz-executor.3 Not tainted 5.2.0+ #41
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+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2dc/0x755 kernel/panic.c:219
 __warn.cold+0x20/0x4c kernel/panic.c:576
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1008
RIP: 0010:__mark_chain_precision+0x19bb/0x1ee0 kernel/bpf/verifier.c:1785
Code: 08 31 ff 89 de e8 d5 b2 f2 ff 84 db 0f 85 ce fe ff ff e8 88 b1 f2 ff 48 c7 c7 a0 78 91 87 c6 05 3e 2d 1f 08 01 e8 6d 5b c4 ff <0f> 0b 41 bc f2 ff ff ff e9 af fe ff ff e8 33 97 2c 00 e9 c2 e7 ff
RSP: 0018:ffff88808ec0f5d8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000c85e RSI: ffffffff815c1016 RDI: ffffed1011d81ead
RBP: ffff88808ec0f728 R08: ffff888097608500 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888069b25100 R14: 0000000000000001 R15: ffff88808cf21480
 mark_chain_precision kernel/bpf/verifier.c:1822 [inline]
 propagate_precision kernel/bpf/verifier.c:7177 [inline]
 is_state_visited kernel/bpf/verifier.c:7298 [inline]
 do_check+0x36d5/0x8a50 kernel/bpf/verifier.c:7510
 bpf_check+0x6f99/0x9950 kernel/bpf/verifier.c:9293
 bpf_prog_load+0xe68/0x1670 kernel/bpf/syscall.c:1698
 __do_sys_bpf+0xa46/0x42f0 kernel/bpf/syscall.c:2849
 __se_sys_bpf kernel/bpf/syscall.c:2808 [inline]
 __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2808
 do_syscall_64+0xfd/0x6a0 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:00007f7a83820c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7a838216d4
R13: 00000000004bfc7c R14: 00000000004d1838 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..