------------[ cut here ]------------
mismatching kcsan_end_atomic()
WARNING: CPU: 1 PID: 21323 at kernel/kcsan/core.c:264 kcsan_end_atomic kernel/kcsan/core.c:264 [inline]
WARNING: CPU: 1 PID: 21323 at kernel/kcsan/core.c:264 kcsan_end_atomic+0x60/0xd0 kernel/kcsan/core.c:252
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 21323 Comm: syz-executor.1 Not tainted 5.3.0+ #0
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+0xf5/0x159 lib/dump_stack.c:113
 panic+0x209/0x639 kernel/panic.c:219
 __warn.cold+0x4c/0x4d kernel/panic.c:576
 report_bug+0x1cf/0x1e0 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+0xda/0x140 arch/x86/kernel/traps.c:272
 do_invalid_op+0x43/0x60 arch/x86/kernel/traps.c:291
 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:kcsan_end_atomic kernel/kcsan/core.c:264 [inline]
RIP: 0010:kcsan_end_atomic+0x60/0xd0 kernel/kcsan/core.c:252
Code: 89 e5 74 77 65 ff 05 1f 90 af 7e 65 8b 05 b0 90 ae 7e a9 00 01 1f 00 75 77 e8 cc fe ff ff 48 c7 c7 70 34 60 85 e8 78 1c db ff <0f> 0b e8 09 ff ff ff 5d c3 a9 00 01 1f 00 75 14 65 48 8b 04 25 40
RSP: 0018:ffffc900018e76b0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880acb25000 RCX: ffffc9000a6af000
RDX: 0000000000006fed RSI: ffffffff81388b3d RDI: 0000000000000006
RBP: ffffc900018e76b0 R08: ffff888098827040 R09: 000000000000001e
R10: ffff8880b603c080 R11: 0000000000000000 R12: 0000000000000022
R13: ffff8880b607b600 R14: ffff8880acb250bc R15: ffffe8ffffd6aa20
 raw_write_seqcount_end include/linux/seqlock.h:256 [inline]
 write_seqcount_end include/linux/seqlock.h:414 [inline]
 qdisc_run_end include/net/sch_generic.h:175 [inline]
 __dev_xmit_skb net/core/dev.c:3480 [inline]
 __dev_queue_xmit+0x175f/0x1b80 net/core/dev.c:3838
 dev_queue_xmit+0x21/0x30 net/core/dev.c:3902
 neigh_resolve_output net/core/neighbour.c:1490 [inline]
 neigh_resolve_output+0x44a/0x470 net/core/neighbour.c:1470
 neigh_output include/net/neighbour.h:511 [inline]
 ip_finish_output2+0x4a9/0xe30 net/ipv4/ip_output.c:228
 __ip_finish_output net/ipv4/ip_output.c:308 [inline]
 __ip_finish_output+0x23a/0x490 net/ipv4/ip_output.c:290
 ip_finish_output+0x41/0x160 net/ipv4/ip_output.c:318
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip_mc_output+0x143/0x620 net/ipv4/ip_output.c:417
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0x74/0x90 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x3a8/0xa40 net/ipv4/ip_output.c:532
 ip_queue_xmit include/net/ip.h:236 [inline]
 l2tp_xmit_core net/l2tp/l2tp_core.c:1033 [inline]
 l2tp_xmit_skb+0x63a/0x9d0 net/l2tp/l2tp_core.c:1132
 pppol2tp_sendmsg+0x2fc/0x3c0 net/l2tp/l2tp_ppp.c:325
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0x9f/0xc0 net/socket.c:657
 ___sys_sendmsg+0x2b7/0x5d0 net/socket.c:2311
 __sys_sendmmsg+0x123/0x350 net/socket.c:2413
 __do_sys_sendmmsg net/socket.c:2442 [inline]
 __se_sys_sendmmsg net/socket.c:2439 [inline]
 __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2439
 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x459a29
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:00007f144b55bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459a29
RDX: 00000000000000a9 RSI: 0000000020005fc0 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f144b55c6d4
R13: 00000000004c7213 R14: 00000000004dca18 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..