[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.254' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 33.312018] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 33.330061] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 33.343792] kasan: CONFIG_KASAN_INLINE enabled [ 33.348786] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.360610] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.366861] CPU: 0 PID: 8105 Comm: syz-executor918 Not tainted 4.19.155-syzkaller #0 [ 33.374736] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.384096] RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 [ 33.390141] Code: 08 f8 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 d1 d4 9f f9 48 8d bb f8 07 00 00 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 75 61 48 8b 83 f8 07 00 00 48 8d 98 08 f8 ff ff 48 [ 33.409032] RSP: 0018:ffff888098ecf3e8 EFLAGS: 00010a02 [ 33.414376] RAX: 1bd5a00000000020 RBX: deacfffffffff908 RCX: ffffffff87c4fa1b [ 33.421640] RDX: 0000000000000000 RSI: ffffffff87c4f9bf RDI: dead000000000100 [ 33.428908] RBP: ffff8880a8890a20 R08: ffff8880ab4c58c0 R09: 0000000000000000 [ 33.436177] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 [ 33.443447] R13: dffffc0000000000 R14: ffff8880a8890a00 R15: 0000000000000000 [ 33.450722] FS: 00007fa2b68ab700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 33.458952] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.464835] CR2: 00007f1f87a1c930 CR3: 00000000a8d21000 CR4: 00000000001406f0 [ 33.472211] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.479480] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.486750] Call Trace: [ 33.489344] ieee80211_assign_vif_chanctx+0x73c/0x1590 [ 33.494630] __ieee80211_vif_release_channel+0x22f/0x420 [ 33.500089] ieee80211_vif_release_channel+0x10a/0x1e0 [ 33.505379] ieee80211_ibss_disconnect+0x5a0/0xe40 [ 33.510310] ieee80211_ibss_leave+0x12/0xd8 [ 33.514676] __cfg80211_leave_ibss+0x191/0x7c0 [ 33.519254] cfg80211_leave_ibss+0x54/0x70 [ 33.523476] cfg80211_change_iface+0x925/0x1530 [ 33.528193] nl80211_set_interface+0x661/0x830 [ 33.532759] ? nl80211_nan_del_func+0x8b0/0x8b0 [ 33.537410] ? nl80211_dump_interface+0x6e0/0x6e0 [ 33.542249] ? nl80211_pre_doit+0xa2/0x620 [ 33.546466] ? __cfg80211_rdev_from_attrs+0x700/0x700 [ 33.551643] genl_family_rcv_msg+0x642/0xc40 [ 33.556034] ? genl_rcv+0x40/0x40 [ 33.559464] ? genl_rcv_msg+0x12f/0x160 [ 33.563418] ? __mutex_add_waiter+0x160/0x160 [ 33.567898] ? __radix_tree_lookup+0x216/0x370 [ 33.572463] genl_rcv_msg+0xbf/0x160 [ 33.576158] netlink_rcv_skb+0x160/0x440 [ 33.580197] ? genl_family_rcv_msg+0xc40/0xc40 [ 33.584758] ? netlink_ack+0xae0/0xae0 [ 33.588631] ? genl_rcv+0x15/0x40 [ 33.592066] genl_rcv+0x24/0x40 [ 33.595330] netlink_unicast+0x4d5/0x690 [ 33.599377] ? netlink_sendskb+0x110/0x110 [ 33.603600] ? _copy_from_iter_full+0x229/0x7c0 [ 33.609034] ? __phys_addr_symbol+0x2c/0x70 [ 33.613350] ? __check_object_size+0x17b/0x3d1 [ 33.617910] netlink_sendmsg+0x6bb/0xc40 [ 33.622015] ? aa_af_perm+0x230/0x230 [ 33.625804] ? nlmsg_notify+0x1a0/0x1a0 [ 33.629819] ? kernel_recvmsg+0x220/0x220 [ 33.633962] ? nlmsg_notify+0x1a0/0x1a0 [ 33.637929] sock_sendmsg+0xc3/0x120 [ 33.641636] ___sys_sendmsg+0x7bb/0x8e0 [ 33.645618] ? copy_msghdr_from_user+0x440/0x440 [ 33.650372] ? __fget+0x32f/0x510 [ 33.653815] ? lock_downgrade+0x720/0x720 [ 33.657948] ? check_preemption_disabled+0x41/0x280 [ 33.662948] ? check_preemption_disabled+0x41/0x280 [ 33.668031] ? __fget+0x356/0x510 [ 33.671466] ? do_dup2+0x450/0x450 [ 33.674989] ? lock_downgrade+0x720/0x720 [ 33.679122] ? check_preemption_disabled+0x41/0x280 [ 33.684146] ? __fdget+0x1d0/0x230 [ 33.687672] __x64_sys_sendmsg+0x132/0x220 [ 33.691897] ? __sys_sendmsg+0x1b0/0x1b0 [ 33.695947] ? __se_sys_futex+0x298/0x3b0 [ 33.700081] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 33.705428] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.710433] ? do_syscall_64+0x21/0x620 [ 33.714403] do_syscall_64+0xf9/0x620 [ 33.718184] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.723352] RIP: 0033:0x447629 [ 33.726521] Code: e8 ec e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 9b 04 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 33.745404] RSP: 002b:00007fa2b68aad98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.753094] RAX: ffffffffffffffda RBX: 00000000006dcc68 RCX: 0000000000447629 [ 33.760353] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 33.767601] RBP: 00000000006dcc60 R08: 0000000000000005 R09: 0000000000000000 [ 33.774849] R10: 0000000000000008 R11: 0000000000000246 R12: 00000000006dcc6c [ 33.782096] R13: 0000000000000000 R14: 000000306e616c77 R15: 0000000000000300 [ 33.789358] Modules linked in: [ 33.794989] ---[ end trace d4194c31ef7ae72b ]--- [ 33.799877] RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 [ 33.807424] Code: 08 f8 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 d1 d4 9f f9 48 8d bb f8 07 00 00 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 75 61 48 8b 83 f8 07 00 00 48 8d 98 08 f8 ff ff 48 [ 33.826433] RSP: 0018:ffff888098ecf3e8 EFLAGS: 00010a02 [ 33.831881] RAX: 1bd5a00000000020 RBX: deacfffffffff908 RCX: ffffffff87c4fa1b [ 33.839274] RDX: 0000000000000000 RSI: ffffffff87c4f9bf RDI: dead000000000100 [ 33.849141] RBP: ffff8880a8890a20 R08: ffff8880ab4c58c0 R09: 0000000000000000 [ 33.856505] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 [ 33.863983] R13: dffffc0000000000 R14: ffff8880a8890a00 R15: 0000000000000000 [ 33.871273] FS: 00007fa2b68ab700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.879497] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.885431] CR2: 00007fa2b6868e78 CR3: 00000000a8d21000 CR4: 00000000001406e0 [ 33.892738] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.900006] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.907332] Kernel panic - not syncing: Fatal exception [ 33.913409] Kernel Offset: disabled [ 33.917018] Rebooting in 86400 seconds..