[ 35.274821][ T39] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 35.334555][ T39] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 35.385228][ T39] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 35.518201][ T39] bridge_slave_1: left allmulticast mode [ 35.518240][ T39] bridge_slave_1: left promiscuous mode [ 35.518507][ T39] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.522775][ T39] bridge_slave_0: left allmulticast mode [ 35.522806][ T39] bridge_slave_0: left promiscuous mode [ 35.523447][ T39] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.578604][ T39] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 35.613246][ T39] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 35.622682][ T39] bond0 (unregistering): Released all slaves [ 35.686130][ T39] hsr_slave_0: left promiscuous mode [ 35.687429][ T39] hsr_slave_1: left promiscuous mode [ 35.688833][ T39] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 35.690283][ T39] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 35.692216][ T39] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 35.693618][ T39] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 35.698449][ T39] veth1_macvtap: left promiscuous mode [ 35.698500][ T39] veth0_macvtap: left promiscuous mode [ 35.698560][ T39] veth1_vlan: left promiscuous mode [ 35.698610][ T39] veth0_vlan: left promiscuous mode [ 35.790430][ T39] team0 (unregistering): Port device team_slave_1 removed [ 35.794023][ T39] team0 (unregistering): Port device team_slave_0 removed [ 35.838339][ T4396] 8021q: adding VLAN 0 to HW filter on device eth0 [ 35.953424][ T4396] 8021q: adding VLAN 0 to HW filter on device eth1 [ 36.073921][ T4396] 8021q: adding VLAN 0 to HW filter on device eth2 [ 36.187420][ T4396] 8021q: adding VLAN 0 to HW filter on device eth3 Warning: Permanently added '10.128.0.200' (ED25519) to the list of known hosts. 1970/01/01 00:00:38 ignoring optional flag "type"="gce" 1970/01/01 00:00:39 parsed 1 programs [ 39.169409][ T4869] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS 1970/01/01 00:00:39 executed programs: 0 [ 39.186464][ T4728] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 39.186834][ T4728] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 39.186998][ T4728] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 39.187293][ T4728] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 39.187506][ T4728] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 39.314375][ T4876] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.314418][ T4876] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.314468][ T4876] bridge_slave_0: entered allmulticast mode [ 39.314925][ T4876] bridge_slave_0: entered promiscuous mode [ 39.315556][ T4876] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.315592][ T4876] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.315668][ T4876] bridge_slave_1: entered allmulticast mode [ 39.316034][ T4876] bridge_slave_1: entered promiscuous mode [ 39.327414][ T4876] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 39.328262][ T4876] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 39.335244][ T4876] team0: Port device team_slave_0 added [ 39.336387][ T4876] team0: Port device team_slave_1 added [ 39.343007][ T4876] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 39.343025][ T4876] 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 1532 would solve the problem. [ 39.343040][ T4876] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 39.343506][ T4876] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 39.343512][ T4876] 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 1532 would solve the problem. [ 39.343525][ T4876] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 39.364125][ T4876] hsr_slave_0: entered promiscuous mode [ 39.364416][ T4876] hsr_slave_1: entered promiscuous mode [ 39.699168][ T4876] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 39.702734][ T4876] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 39.704493][ T4876] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 39.706696][ T4876] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 39.708532][ T4876] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 39.710737][ T4876] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 39.714855][ T4876] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 39.716930][ T4876] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 39.726004][ T4876] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.726046][ T4876] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.726131][ T4876] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.726164][ T4876] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.750439][ T4876] 8021q: adding VLAN 0 to HW filter on device bond0 [ 39.755242][ T3659] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.756998][ T3659] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.763897][ T4876] 8021q: adding VLAN 0 to HW filter on device team0 [ 39.767256][ T39] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.767297][ T39] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.772737][ T39] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.772777][ T39] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.873777][ T4876] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 39.890452][ T4876] veth0_vlan: entered promiscuous mode [ 39.894917][ T4876] veth1_vlan: entered promiscuous mode [ 39.906103][ T4876] veth0_macvtap: entered promiscuous mode [ 39.907211][ T4876] veth1_macvtap: entered promiscuous mode [ 39.911698][ T4876] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 39.920544][ T4876] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 39.927623][ T39] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 39.927680][ T39] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 39.927701][ T39] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 39.927718][ T39] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 40.032298][ T4979] nbd0: detected capacity change from 0 to 8388607 [ 40.803027][ T50] block nbd0: Receive control failed (result -104) [ 41.211824][ T50] Bluetooth: hci0: command tx timeout [ 43.291798][ T50] Bluetooth: hci0: command tx timeout [ 45.371781][ T50] Bluetooth: hci0: command tx timeout [ 47.451518][ T50] Bluetooth: hci0: command tx timeout [ 64.492662][ T1594] ieee802154 phy0 wpan0: encryption failed: -22 [ 64.492721][ T1594] ieee802154 phy1 wpan1: encryption failed: -22 [ 64.495078][ T1500] cfg80211: failed to load regulatory.db [ 70.253193][ T25] block nbd0: Possible stuck request 000000001ff7310c: control (read@0,4096B). Runtime 30 seconds 1970/01/01 00:01:34 executed programs: 1 [ 95.987768][ T4728] Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1 [ 95.988657][ T4728] Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9 [ 95.988863][ T4728] Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9 [ 95.989191][ T4728] Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4 [ 95.989405][ T4728] Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2 [ 96.120862][ T5036] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.120902][ T5036] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.120988][ T5036] bridge_slave_0: entered allmulticast mode [ 96.121396][ T5036] bridge_slave_0: entered promiscuous mode [ 96.123005][ T5036] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.123060][ T5036] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.123106][ T5036] bridge_slave_1: entered allmulticast mode [ 96.123507][ T5036] bridge_slave_1: entered promiscuous mode [ 96.134268][ T5036] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 96.135119][ T5036] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 96.142525][ T5036] team0: Port device team_slave_0 added [ 96.143219][ T5036] team0: Port device team_slave_1 added [ 96.150187][ T5036] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 96.150417][ T5036] 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 1532 would solve the problem. [ 96.150436][ T5036] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 96.150992][ T5036] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 96.150999][ T5036] 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 1532 would solve the problem. [ 96.151014][ T5036] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 96.166921][ T5036] hsr_slave_0: entered promiscuous mode [ 96.167233][ T5036] hsr_slave_1: entered promiscuous mode [ 96.167460][ T5036] debugfs: 'hsr0' already exists in 'hsr' [ 96.167505][ T5036] Cannot create hsr debugfs directory [ 96.226646][ T5036] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 96.304825][ T5036] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 96.364858][ T5036] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 96.476610][ T5036] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 96.595299][ T5036] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 96.597457][ T5036] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 96.599692][ T5036] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 96.602184][ T5036] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 96.602598][ T5036] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 96.604398][ T5036] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 96.604705][ T5036] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 96.606603][ T5036] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 96.612928][ T5036] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.612974][ T5036] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.613038][ T5036] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.613065][ T5036] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.626121][ T5036] 8021q: adding VLAN 0 to HW filter on device bond0 [ 96.629192][ T39] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.630690][ T39] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.635704][ T5036] 8021q: adding VLAN 0 to HW filter on device team0 [ 96.637635][ T2983] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.637672][ T2983] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.640838][ T3659] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.640885][ T3659] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.728777][ T5036] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 96.744899][ T5036] veth0_vlan: entered promiscuous mode [ 96.746721][ T5036] veth1_vlan: entered promiscuous mode [ 96.753822][ T5036] veth0_macvtap: entered promiscuous mode [ 96.754778][ T5036] veth1_macvtap: entered promiscuous mode [ 96.758104][ T5036] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 96.759204][ T5036] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 96.763083][ T39] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 96.763149][ T39] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 96.763201][ T39] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 96.763246][ T39] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 98.021537][ T50] Bluetooth: hci1: command tx timeout [ 100.091583][ T50] Bluetooth: hci1: command tx timeout [ 100.343007][ T25] block nbd0: Possible stuck request 000000001ff7310c: control (read@0,4096B). Runtime 60 seconds [ 102.171741][ T50] Bluetooth: hci1: command tx timeout [ 102.600804][ T4341] udevd[4341]: worker [4790] /devices/virtual/block/nbd0 is taking a long time [ 104.251523][ T50] Bluetooth: hci1: command tx timeout [ 125.932201][ T1594] ieee802154 phy0 wpan0: encryption failed: -22 [ 125.932251][ T1594] ieee802154 phy1 wpan1: encryption failed: -22 [ 130.411674][ T25] block nbd0: Possible stuck request 000000001ff7310c: control (read@0,4096B). Runtime 90 seconds 1970/01/01 00:02:31 executed programs: 2 [ 152.807222][ T4728] Bluetooth: hci2: unexpected cc 0x0c03 length: 249 > 1 [ 152.807623][ T4728] Bluetooth: hci2: unexpected cc 0x1003 length: 249 > 9 [ 152.807800][ T4728] Bluetooth: hci2: unexpected cc 0x1001 length: 249 > 9 [ 152.808115][ T4728] Bluetooth: hci2: unexpected cc 0x0c23 length: 249 > 4 [ 152.808314][ T4728] Bluetooth: hci2: unexpected cc 0x0c38 length: 249 > 2 [ 152.941081][ T5077] bridge0: port 1(bridge_slave_0) entered blocking state [ 152.941160][ T5077] bridge0: port 1(bridge_slave_0) entered disabled state [ 152.941248][ T5077] bridge_slave_0: entered allmulticast mode [ 152.942191][ T5077] bridge_slave_0: entered promiscuous mode [ 152.943298][ T5077] bridge0: port 2(bridge_slave_1) entered blocking state [ 152.943336][ T5077] bridge0: port 2(bridge_slave_1) entered disabled state [ 152.943389][ T5077] bridge_slave_1: entered allmulticast mode [ 152.943795][ T5077] bridge_slave_1: entered promiscuous mode [ 152.953898][ T5077] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 152.955822][ T5077] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 152.963745][ T5077] team0: Port device team_slave_0 added [ 152.964451][ T5077] team0: Port device team_slave_1 added [ 152.971673][ T5077] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 152.971694][ T5077] 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 1532 would solve the problem. [ 152.971874][ T5077] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 152.972399][ T5077] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 152.972406][ T5077] 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 1532 would solve the problem. [ 152.972418][ T5077] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 152.988690][ T5077] hsr_slave_0: entered promiscuous mode [ 152.988996][ T5077] hsr_slave_1: entered promiscuous mode [ 152.989186][ T5077] debugfs: 'hsr0' already exists in 'hsr' [ 152.989196][ T5077] Cannot create hsr debugfs directory [ 153.046444][ T5077] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 153.084915][ T5077] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 153.185034][ T5077] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 153.245722][ T5077] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 153.355262][ T5077] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 153.357739][ T5077] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 153.360139][ T5077] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 153.362326][ T5077] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 153.362718][ T5077] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 153.364709][ T5077] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 153.365013][ T5077] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 153.366987][ T5077] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 153.374093][ T5077] bridge0: port 2(bridge_slave_1) entered blocking state [ 153.374129][ T5077] bridge0: port 2(bridge_slave_1) entered forwarding state [ 153.374202][ T5077] bridge0: port 1(bridge_slave_0) entered blocking state [ 153.374232][ T5077] bridge0: port 1(bridge_slave_0) entered forwarding state [ 153.389416][ T5077] 8021q: adding VLAN 0 to HW filter on device bond0 [ 153.393100][ T2983] bridge0: port 1(bridge_slave_0) entered disabled state [ 153.394591][ T2983] bridge0: port 2(bridge_slave_1) entered disabled state [ 153.398286][ T5077] 8021q: adding VLAN 0 to HW filter on device team0 [ 153.400103][ T2983] bridge0: port 1(bridge_slave_0) entered blocking state [ 153.400138][ T2983] bridge0: port 1(bridge_slave_0) entered forwarding state [ 153.404663][ T2983] bridge0: port 2(bridge_slave_1) entered blocking state [ 153.404701][ T2983] bridge0: port 2(bridge_slave_1) entered forwarding state [ 153.495471][ T5077] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 153.505557][ T5077] veth0_vlan: entered promiscuous mode [ 153.507254][ T5077] veth1_vlan: entered promiscuous mode [ 153.514120][ T5077] veth0_macvtap: entered promiscuous mode [ 153.515182][ T5077] veth1_macvtap: entered promiscuous mode [ 153.518734][ T5077] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 153.519811][ T5077] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 153.522559][ T39] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 153.524160][ T39] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 153.527092][ T39] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 153.528593][ T39] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 154.811547][ T50] Bluetooth: hci2: command tx timeout [ 156.891522][ T50] Bluetooth: hci2: command tx timeout [ 158.971726][ T50] Bluetooth: hci2: command tx timeout [ 160.491992][ T25] block nbd0: Possible stuck request 000000001ff7310c: control (read@0,4096B). Runtime 120 seconds [ 161.051549][ T50] Bluetooth: hci2: command tx timeout [ 163.851534][ T4728] Bluetooth: hci0: command 0x0406 tx timeout [ 187.372172][ T1594] ieee802154 phy0 wpan0: encryption failed: -22 [ 187.372216][ T1594] ieee802154 phy1 wpan1: encryption failed: -22 [ 190.571631][ T25] block nbd0: Possible stuck request 000000001ff7310c: control (read@0,4096B). Runtime 150 seconds [ 194.411596][ T31] INFO: task syz-executor.0:4979 blocked ** replaying previous printk message ** [ 194.411596][ T31] INFO: task syz-executor.0:4979 blocked for more than 143 seconds. [ 194.411625][ T31] Not tainted syzkaller #0 [ 194.412187][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 194.412194][ T31] task:syz-executor.0 state:D stack:0 pid:4979 tgid:4977 ppid:4876 task_flags:0x400140 flags:0x00000019 [ 194.412210][ T31] Call trace: [ 194.412214][ T31] __switch_to+0x2b0/0x6e0 (T) [ 194.412233][ T31] __schedule+0x1370/0x2d80 [ 194.412243][ T31] schedule+0x13c/0x20c [ 194.412252][ T31] schedule_preempt_disabled+0x18/0x2c [ 194.412262][ T31] __mutex_lock+0x4ec/0xf14 [ 194.412272][ T31] mutex_lock_nested+0x24/0x30 [ 194.412281][ T31] bdev_release+0x128/0x328 [ 194.412291][ T31] blkdev_release+0x20/0x34 [ 194.412300][ T31] __fput+0x338/0x74c [ 194.412309][ T31] ____fput+0x20/0x30 [ 194.412317][ T31] task_work_run+0x1cc/0x25c [ 194.412328][ T31] get_signal+0xf30/0x1094 [ 194.412337][ T31] arch_do_signal_or_restart+0x288/0x444c [ 194.412348][ T31] exit_to_user_mode_loop+0x70/0x17c [ 194.412358][ T31] el0_svc+0x18c/0x260 [ 194.412369][ T31] el0t_64_sync_handler+0x48/0x148 [ 194.412379][ T31] el0t_64_sync+0x198/0x19c [ 194.412400][ T31] [ 194.412400][ T31] Showing all locks held in the system: [ 194.412404][ T31] 2 locks held by kworker/0:0/9: [ 194.412418][ T31] 1 lock held by khungtaskd/31: [ 194.412423][ T31] #0: ffff800088cf7020 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 [ 194.412454][ T31] 2 locks held by pr/ttyAMA-1/41: [ 194.412473][ T31] 2 locks held by getty/4488: [ 194.412478][ T31] #0: ffff0000ce2260a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c [ 194.412501][ T31] #1: ffff8000924cb2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 [ 194.412526][ T31] 1 lock held by udevd/4790: [ 194.412531][ T31] #0: ffff0000c74a2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xc4/0x880 [ 194.412555][ T31] 1 lock held by syz-executor.0/4979: [ 194.412559][ T31] #0: ffff0000c74a2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x128/0x328 [ 194.412579][ T31] 1 lock held by syz-executor.0/5069: [ 194.412584][ T31] #0: ffff0000c74a2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xc4/0x880 [ 194.412604][ T31] 1 lock held by syz-executor.0/5110: [ 194.412609][ T31] #0: ffff0000c74a2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xc4/0x880 [ 194.412629][ T31] [ 194.412631][ T31] ============================================= [ 194.412631][ T31] [ 194.412637][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 194.453339][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT [ 194.454750][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 194.456483][ T31] Call trace: [ 194.457020][ T31] show_stack+0x2c/0x3c (C) [ 194.457733][ T31] __dump_stack+0x30/0x40 [ 194.458396][ T31] dump_stack_lvl+0x30/0x12c [ 194.459138][ T31] dump_stack+0x1c/0x28 [ 194.459838][ T31] vpanic+0x594/0xaf8 [ 194.460529][ T31] vpanic+0x0/0xaf8 [ 194.461210][ T31] hung_task_panic+0x0/0x2c [ 194.461962][ T31] kthread+0x304/0x3d4 [ 194.462693][ T31] ret_from_fork+0x10/0x20 [ 194.463400][ T31] SMP: stopping secondary CPUs [ 194.464243][ T31] Kernel Offset: disabled [ 194.464946][ T31] CPU features: 0x14000000,003c0008,27020501,5427fea7 [ 194.466053][ T31] Memory Limit: none [ 194.692489][ T31] Rebooting in 86400 seconds..