bisecting fixing commit since b94de4d19498b454645b72d08a05d32fa9074fb5 building syzkaller on cba33199be220cbf61f7c0c8223d88a25a913d6f testing commit b94de4d19498b454645b72d08a05d32fa9074fb5 with gcc (GCC) 8.4.1 20210217 kernel signature: 57443fba5c35577a47bd0e1d7ff221a68dcea1f6b9f91d316ed74c66ad20aa96 all runs: crashed: KASAN: use-after-free Read in ieee80211_ibss_build_presp testing current HEAD eb575cd5d7f60241d016fdd13a9e86d962093c9b testing commit eb575cd5d7f60241d016fdd13a9e86d962093c9b with gcc (GCC) 8.4.1 20210217 kernel signature: 7a9ea3d2da83a2e60412d2888f0e97db292df4aa74da9caa6eeed8d82519c8d1 all runs: crashed: BUG: sleeping function called from invalid context in lock_sock_nested revisions tested: 2, total time: 34m23.859563346s (build: 22m19.43452746s, test: 11m28.232590459s) the crash still happens on HEAD commit msg: Linux 4.19.195 crash: BUG: sleeping function called from invalid context in lock_sock_nested IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready BUG: sleeping function called from invalid context at net/core/sock.c:2863 in_atomic(): 1, irqs_disabled(): 0, pid: 16954, name: syz-executor.4 1 lock held by syz-executor.4/16954: #0: 0000000052fabe54 (hci_sk_list.lock){++++}, at: hci_sock_dev_event+0x361/0x5e0 net/bluetooth/hci_sock.c:756 Preemption disabled at: [] hci_sock_dev_event+0x361/0x5e0 net/bluetooth/hci_sock.c:756 CPU: 0 PID: 16954 Comm: syz-executor.4 Not tainted 4.19.195-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+0x17c/0x226 lib/dump_stack.c:118 ___might_sleep.cold.15+0x1f1/0x265 kernel/sched/core.c:6192 __might_sleep+0x95/0x190 kernel/sched/core.c:6145 lock_sock_nested+0x24/0x100 net/core/sock.c:2863 lock_sock include/net/sock.h:1510 [inline] hci_sock_dev_event+0x3e4/0x5e0 net/bluetooth/hci_sock.c:758 hci_unregister_dev+0x20b/0x890 net/bluetooth/hci_core.c:3292 vhci_release+0x6b/0xe0 drivers/bluetooth/hci_vhci.c:354 __fput+0x249/0x7f0 fs/file_table.c:278 ____fput+0x9/0x10 fs/file_table.c:309 task_work_run+0x108/0x180 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xa6a/0x2d90 kernel/exit.c:870 do_group_exit+0xf8/0x2c0 kernel/exit.c:967 __do_sys_exit_group kernel/exit.c:978 [inline] __se_sys_exit_group kernel/exit.c:976 [inline] __x64_sys_exit_group+0x39/0x40 kernel/exit.c:976 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465889 Code: Bad RIP value. RSP: 002b:00007fff8c8baee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000011 RCX: 0000000000465889 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043 RBP: 00000000004af253 R08: 000000000000000b R09: 0000000000040dfc R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000041132 R14: 0000000000040dfc R15: 0000000000000008 Bluetooth: hci2: command 0x0409 tx timeout Bluetooth: hci0: command 0x0409 tx timeout chnl_net:caif_netlink_parms(): no params data found IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready chnl_net:caif_netlink_parms(): no params data found bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 bond0: Enslaving bond_slave_0 as an active interface with an up link bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode bond0: Enslaving bond_slave_1 as an active interface with an up link IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready team0: Port device team_slave_0 added bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready team0: Port device team_slave_1 added bond0: Enslaving bond_slave_0 as an active interface with an up link bond0: Enslaving bond_slave_1 as an active interface with an up link batman_adv: batadv0: Adding interface: batadv_slave_0 batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready team0: Port device team_slave_0 added batman_adv: batadv0: Adding interface: batadv_slave_1 batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode Bluetooth: hci0: command 0x041b tx timeout Bluetooth: hci2: command 0x041b tx timeout Bluetooth: hci4: command 0x0409 tx timeout Bluetooth: hci1: command 0x0409 tx timeout Bluetooth: hci2: command 0x040f tx timeout Bluetooth: hci0: command 0x040f tx timeout Bluetooth: hci1: command 0x041b tx timeout Bluetooth: hci4: command 0x041b tx timeout Bluetooth: hci0: command 0x0419 tx timeout Bluetooth: hci2: command 0x0419 tx timeout Bluetooth: hci4: command 0x040f tx timeout Bluetooth: hci1: command 0x040f tx timeout Bluetooth: hci1: command 0x0419 tx timeout Bluetooth: hci4: command 0x0419 tx timeout