[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.0.167' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 36.132831] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 36.154529] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 36.184566] kasan: CONFIG_KASAN_INLINE enabled [ 36.191546] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.204909] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.211193] CPU: 1 PID: 8115 Comm: syz-executor802 Not tainted 4.19.157-syzkaller #0 [ 36.219471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.232374] RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 [ 36.241333] Code: 08 f8 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 21 b3 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 [ 36.261800] RSP: 0018:ffff8880b133f3e8 EFLAGS: 00010a02 [ 36.267369] RAX: 1bd5a00000000020 RBX: deacfffffffff908 RCX: ffffffff87c51c9b [ 36.274909] RDX: 0000000000000000 RSI: ffffffff87c51c3f RDI: dead000000000100 [ 36.282551] RBP: ffff8880ae895420 R08: ffff8880ab9e1700 R09: 0000000000000000 [ 36.290202] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 [ 36.298291] R13: dffffc0000000000 R14: ffff8880ae895400 R15: 0000000000000000 [ 36.306010] FS: 0000000002616940(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 36.315212] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.321949] CR2: 00007f1107e64170 CR3: 00000000a9d45000 CR4: 00000000001406e0 [ 36.330353] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.337957] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.346231] Call Trace: [ 36.349266] ieee80211_assign_vif_chanctx+0x73c/0x1590 [ 36.354548] __ieee80211_vif_release_channel+0x22f/0x420 [ 36.363503] ieee80211_vif_release_channel+0x10a/0x1e0 [ 36.369111] ieee80211_ibss_disconnect+0x5a0/0xe40 [ 36.374032] ieee80211_ibss_leave+0x12/0xd8 [ 36.378343] __cfg80211_leave_ibss+0x191/0x7c0 [ 36.382923] cfg80211_leave_ibss+0x54/0x70 [ 36.387160] cfg80211_change_iface+0x925/0x1530 [ 36.391833] nl80211_set_interface+0x661/0x830 [ 36.396403] ? nl80211_nan_del_func+0x8b0/0x8b0 [ 36.401091] ? nl80211_dump_interface+0x6e0/0x6e0 [ 36.406064] ? nl80211_pre_doit+0xa2/0x620 [ 36.410404] ? __cfg80211_rdev_from_attrs+0x700/0x700 [ 36.415712] genl_family_rcv_msg+0x642/0xc40 [ 36.420752] ? genl_rcv+0x40/0x40 [ 36.424397] ? genl_rcv_msg+0x12f/0x160 [ 36.428364] ? __mutex_add_waiter+0x160/0x160 [ 36.432890] ? __radix_tree_lookup+0x216/0x370 [ 36.437478] genl_rcv_msg+0xbf/0x160 [ 36.441198] netlink_rcv_skb+0x160/0x440 [ 36.445537] ? genl_family_rcv_msg+0xc40/0xc40 [ 36.450114] ? netlink_ack+0xae0/0xae0 [ 36.453991] ? genl_rcv+0x15/0x40 [ 36.457660] genl_rcv+0x24/0x40 [ 36.460930] netlink_unicast+0x4d5/0x690 [ 36.464980] ? netlink_sendskb+0x110/0x110 [ 36.469335] ? _copy_from_iter_full+0x229/0x7c0 [ 36.473996] ? __phys_addr_symbol+0x2c/0x70 [ 36.478413] ? __check_object_size+0x17b/0x3d1 [ 36.482984] netlink_sendmsg+0x6bb/0xc40 [ 36.487216] ? aa_af_perm+0x230/0x230 [ 36.491024] ? nlmsg_notify+0x1a0/0x1a0 [ 36.495071] ? kernel_recvmsg+0x220/0x220 [ 36.499204] ? nlmsg_notify+0x1a0/0x1a0 [ 36.503170] sock_sendmsg+0xc3/0x120 [ 36.506878] ___sys_sendmsg+0x7bb/0x8e0 [ 36.510834] ? copy_msghdr_from_user+0x440/0x440 [ 36.515695] ? sock_ioctl+0x30e/0x5d0 [ 36.519490] ? dlci_ioctl_set+0x30/0x30 [ 36.523477] ? lock_downgrade+0x720/0x720 [ 36.527609] ? lock_acquire+0x170/0x3c0 [ 36.531581] ? debug_object_active_state+0x104/0x330 [ 36.536809] ? mark_held_locks+0xf0/0xf0 [ 36.540891] ? dlci_ioctl_set+0x30/0x30 [ 36.544868] ? do_vfs_ioctl+0x110/0x12e0 [ 36.549026] ? ioctl_preallocate+0x200/0x200 [ 36.553746] ? __fdget+0x1a0/0x230 [ 36.557337] __x64_sys_sendmsg+0x132/0x220 [ 36.561560] ? __sys_sendmsg+0x1b0/0x1b0 [ 36.565609] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.570989] ? trace_hardirqs_off_caller+0x6e/0x210 [ 36.575989] ? do_syscall_64+0x21/0x620 [ 36.580055] do_syscall_64+0xf9/0x620 [ 36.583842] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.589021] RIP: 0033:0x4429b9 [ 36.592194] Code: e8 bc fd 02 00 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 db 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 36.611084] RSP: 002b:00007ffd7fc5d5f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 36.618771] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004429b9 [ 36.626030] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000004 [ 36.633292] RBP: 0000000000008d19 R08: 00000000004035b0 R09: 00000000004035b0 [ 36.640557] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403520 [ 36.647820] R13: 00000000004035b0 R14: 0000000000000000 R15: 0000000000000000 [ 36.655084] Modules linked in: [ 36.678661] ---[ end trace c5c5d826d12a05d2 ]--- [ 36.683607] RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 [ 36.689729] Code: 08 f8 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 21 b3 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 [ 36.708910] RSP: 0018:ffff8880b133f3e8 EFLAGS: 00010a02 [ 36.714351] RAX: 1bd5a00000000020 RBX: deacfffffffff908 RCX: ffffffff87c51c9b [ 36.721807] RDX: 0000000000000000 RSI: ffffffff87c51c3f RDI: dead000000000100 [ 36.729472] RBP: ffff8880ae895420 R08: ffff8880ab9e1700 R09: 0000000000000000 [ 36.736796] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 [ 36.744069] R13: dffffc0000000000 R14: ffff8880ae895400 R15: 0000000000000000 [ 36.751392] FS: 0000000002616940(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 36.759868] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.765836] CR2: 00007f26976ceab4 CR3: 00000000a9d45000 CR4: 00000000001406e0 [ 36.773186] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.780515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.788066] Kernel panic - not syncing: Fatal exception [ 36.794436] Kernel Offset: disabled [ 36.798055] Rebooting in 86400 seconds..