[ 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 '10.128.0.43' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 33.447298] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 33.475570] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 33.502249] kasan: CONFIG_KASAN_INLINE enabled [ 33.507967] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.516128] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.522723] CPU: 0 PID: 8137 Comm: syz-executor284 Not tainted 4.19.158-syzkaller #0 [ 33.530595] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.539955] RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 [ 33.546009] Code: 08 f8 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 41 a1 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 [ 33.564911] RSP: 0018:ffff888093de73e8 EFLAGS: 00010a02 [ 33.570271] RAX: 1bd5a00000000020 RBX: deacfffffffff908 RCX: ffffffff87c52f1b [ 33.577533] RDX: 0000000000000000 RSI: ffffffff87c52ebf RDI: dead000000000100 [ 33.584780] RBP: ffff8880a4684920 R08: ffff8880ab4bd800 R09: 0000000000000000 [ 33.592034] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 [ 33.599333] R13: dffffc0000000000 R14: ffff8880a4684900 R15: 0000000000000000 [ 33.606582] FS: 0000000001380880(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 33.614786] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.620646] CR2: 00007fd5e5e4f930 CR3: 000000009f1ee000 CR4: 00000000001406f0 [ 33.628056] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.635352] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.642597] Call Trace: [ 33.645188] ieee80211_assign_vif_chanctx+0x73c/0x1590 [ 33.650447] __ieee80211_vif_release_channel+0x22f/0x420 [ 33.655890] ieee80211_vif_release_channel+0x10a/0x1e0 [ 33.661161] ieee80211_ibss_disconnect+0x5a0/0xe40 [ 33.666069] ieee80211_ibss_leave+0x12/0xd8 [ 33.670372] __cfg80211_leave_ibss+0x191/0x7c0 [ 33.674936] cfg80211_leave_ibss+0x54/0x70 [ 33.679149] cfg80211_change_iface+0x925/0x1530 [ 33.683799] nl80211_set_interface+0x661/0x830 [ 33.688360] ? nl80211_nan_del_func+0x8b0/0x8b0 [ 33.693009] ? nl80211_dump_interface+0x6e0/0x6e0 [ 33.697832] ? nl80211_pre_doit+0xa2/0x620 [ 33.702071] ? __cfg80211_rdev_from_attrs+0x700/0x700 [ 33.707241] genl_family_rcv_msg+0x642/0xc40 [ 33.711655] ? genl_rcv+0x40/0x40 [ 33.715085] ? genl_rcv_msg+0x12f/0x160 [ 33.719037] ? __mutex_add_waiter+0x160/0x160 [ 33.723511] ? __radix_tree_lookup+0x216/0x370 [ 33.728072] genl_rcv_msg+0xbf/0x160 [ 33.731764] netlink_rcv_skb+0x160/0x440 [ 33.735802] ? genl_family_rcv_msg+0xc40/0xc40 [ 33.740362] ? netlink_ack+0xae0/0xae0 [ 33.744227] ? genl_rcv+0x15/0x40 [ 33.747665] genl_rcv+0x24/0x40 [ 33.750938] netlink_unicast+0x4d5/0x690 [ 33.754981] ? netlink_sendskb+0x110/0x110 [ 33.759202] ? _copy_from_iter_full+0x229/0x7c0 [ 33.763857] ? __phys_addr_symbol+0x2c/0x70 [ 33.768782] ? __check_object_size+0x17b/0x3d1 [ 33.773348] netlink_sendmsg+0x6bb/0xc40 [ 33.777392] ? aa_af_perm+0x230/0x230 [ 33.781268] ? nlmsg_notify+0x1a0/0x1a0 [ 33.785224] ? kernel_recvmsg+0x220/0x220 [ 33.789353] ? nlmsg_notify+0x1a0/0x1a0 [ 33.793309] sock_sendmsg+0xc3/0x120 [ 33.797004] ___sys_sendmsg+0x7bb/0x8e0 [ 33.800957] ? copy_msghdr_from_user+0x440/0x440 [ 33.805693] ? sock_ioctl+0x30e/0x5d0 [ 33.809472] ? dlci_ioctl_set+0x30/0x30 [ 33.813426] ? lock_downgrade+0x720/0x720 [ 33.817552] ? lock_acquire+0x170/0x3c0 [ 33.821510] ? debug_object_active_state+0x104/0x330 [ 33.826592] ? mark_held_locks+0xf0/0xf0 [ 33.830644] ? dlci_ioctl_set+0x30/0x30 [ 33.834600] ? do_vfs_ioctl+0x110/0x12e0 [ 33.838645] ? ioctl_preallocate+0x200/0x200 [ 33.843039] ? __fdget+0x1a0/0x230 [ 33.846600] __x64_sys_sendmsg+0x132/0x220 [ 33.850816] ? __sys_sendmsg+0x1b0/0x1b0 [ 33.854859] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 33.860203] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.865198] ? do_syscall_64+0x21/0x620 [ 33.869151] do_syscall_64+0xf9/0x620 [ 33.872981] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.878149] RIP: 0033:0x441f29 [ 33.881319] Code: e8 4c ff 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 [ 33.900227] RSP: 002b:00007fff33ca2748 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.907912] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441f29 [ 33.915159] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 33.922404] RBP: 00000000000082d9 R08: 00000000004002e0 R09: 00000000004002e0 [ 33.929654] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402a90 [ 33.936901] R13: 0000000000402b20 R14: 0000000000000000 R15: 0000000000000000 [ 33.944152] Modules linked in: [ 33.948141] ---[ end trace 995abdc11a925b4d ]--- [ 33.952915] RIP: 0010:ieee80211_chanctx_num_assigned+0xb1/0x130 [ 33.959006] Code: 08 f8 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 41 a1 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 [ 33.977982] RSP: 0018:ffff888093de73e8 EFLAGS: 00010a02 [ 33.983328] RAX: 1bd5a00000000020 RBX: deacfffffffff908 RCX: ffffffff87c52f1b [ 33.991091] RDX: 0000000000000000 RSI: ffffffff87c52ebf RDI: dead000000000100 [ 33.998425] RBP: ffff8880a4684920 R08: ffff8880ab4bd800 R09: 0000000000000000 [ 34.005726] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 [ 34.012991] R13: dffffc0000000000 R14: ffff8880a4684900 R15: 0000000000000000 [ 34.020303] FS: 0000000001380880(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 34.028561] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.034476] CR2: 00007fd5e5e4f930 CR3: 000000009f1ee000 CR4: 00000000001406f0 [ 34.041739] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.049026] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.056331] Kernel panic - not syncing: Fatal exception [ 34.062316] Kernel Offset: disabled [ 34.065928] Rebooting in 86400 seconds..