IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
WARNING: CPU: 1 PID: 12540 at kernel/signal.c:372 task_participate_group_stop+0x29e/0x300 kernel/signal.c:372
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 12540 Comm: 6 Not tainted 4.19.190-syzkaller #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+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:task_participate_group_stop+0x29e/0x300 kernel/signal.c:372
Code: 00 f0 83 44 24 fc 00 be 15 00 00 00 4c 89 ef e8 18 09 0e 00 e9 4c fe ff ff e8 3e 7b 27 00 0f 0b e9 f2 fd ff ff e8 32 7b 27 00 <0f> 0b e9 a3 fe ff ff 48 89 ef e8 23 3e 5d 00 e9 6d fe ff ff 48 89
RSP: 0018:ffff88803e947bd0 EFLAGS: 00010046
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012e6c000
RDX: 0000000000040000 RSI: ffffffff813ae33e RDI: 0000000000000005
RBP: ffff8880400c88e0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880400c8840
R13: ffff8880b51a2a80 R14: 0000000000040000 R15: 0000000000000000
 do_signal_stop+0x1f1/0x860 kernel/signal.c:2277
 get_signal+0xf17/0x1f70 kernel/signal.c:2464
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x402e70
Code: Bad RIP value.
RSP: 002b:00007ffc6b0b7b80 EFLAGS: 00000200 ORIG_RAX: 000000000000003b
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..