IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 8019 Comm: syz-executor135 Not tainted 4.14.202-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888095b4c000 task.stack: ffff888094488000 RIP: 0010:ieee80211_chanctx_num_assigned+0xa5/0x120 net/mac80211/chan.c:20 RSP: 0018:ffff88809448f4a8 EFLAGS: 00010a02 RAX: 1bd5a00000000020 RBX: deacfffffffff920 RCX: 1ffffffff1279ee0 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: dead000000000100 RBP: ffff8880af104220 R08: 0000000000000000 R09: 000000000004058d R10: ffff888095b4c950 R11: ffff888095b4c000 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff8880af104200 R15: 0000000000000000 FS: 00007fe1c8e6b700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff7ebdec018 CR3: 00000000aadf5000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_assign_vif_chanctx+0x65e/0x1370 net/mac80211/chan.c:676 __ieee80211_vif_release_channel+0x1ef/0x3f0 net/mac80211/chan.c:1543 ieee80211_vif_release_channel+0xef/0x1f0 net/mac80211/chan.c:1757 ieee80211_ibss_disconnect+0x527/0xd40 net/mac80211/ibss.c:744 ieee80211_ibss_leave+0x12/0xd8 net/mac80211/ibss.c:1858 rdev_leave_ibss net/wireless/rdev-ops.h:531 [inline] __cfg80211_leave_ibss+0x14c/0x6d0 net/wireless/ibss.c:217 cfg80211_leave_ibss+0x54/0x70 net/wireless/ibss.c:234 cfg80211_change_iface+0x791/0x13d0 net/wireless/util.c:1028 nl80211_set_interface+0x588/0x760 net/wireless/nl80211.c:2926 genl_family_rcv_msg+0x572/0xb20 net/netlink/genetlink.c:600 genl_rcv_msg+0xaf/0x140 net/netlink/genetlink.c:625 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433 genl_rcv+0x24/0x40 net/netlink/genetlink.c:636 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x447629 RSP: 002b:00007fe1c8e6ad98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000006dcc78 RCX: 0000000000447629 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000005 RBP: 00000000006dcc70 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 00000000006dcc7c R13: 0000000000000000 R14: 000000306e616c77 R15: 0000000000000300 Code: 98 20 f8 ff ff 48 39 c5 74 3b 49 bd 00 00 00 00 00 fc ff df e8 cd ff 7b fa 48 8d bb e0 07 00 00 41 83 c4 01 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 75 5d 48 8b 83 e0 07 00 00 48 8d 98 20 f8 ff ff RIP: ieee80211_chanctx_num_assigned+0xa5/0x120 net/mac80211/chan.c:20 RSP: ffff88809448f4a8 ---[ end trace 42bdb776e0c3a453 ]---