[info] Using makefile-style concurrent boot in runlevel 2. [ 16.034627][ C1] random: crng init done [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.31' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 822.096275][ T94] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 822.096284][ T95] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 822.126158][ T1810] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 822.134691][ T1811] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 822.142233][ T1807] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 822.149733][ T12] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 822.186504][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 822.226423][ T95] usb 6-1: Using ep0 maxpacket: 8 [ 822.246309][ T1807] usb 3-1: Using ep0 maxpacket: 8 [ 822.251513][ T1811] usb 4-1: Using ep0 maxpacket: 8 [ 822.256607][ T12] usb 5-1: Using ep0 maxpacket: 8 [ 822.261799][ T1810] usb 2-1: Using ep0 maxpacket: 8 [ 822.316345][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 822.325717][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 822.335593][ T94] usb 1-1: config 0 descriptor?? [ 822.346584][ T95] usb 6-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 822.355654][ T95] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 822.365051][ T95] usb 6-1: config 0 descriptor?? [ 822.370233][ T1807] usb 3-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 822.379291][ T1807] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 822.387990][ T12] usb 5-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 822.397091][ T12] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 822.406448][ T1811] usb 4-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 822.415496][ T1811] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 822.423621][ T1810] usb 2-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 822.432704][ T1810] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 822.442079][ T12] usb 5-1: config 0 descriptor?? [ 822.448594][ T1811] usb 4-1: config 0 descriptor?? [ 822.454008][ T1807] usb 3-1: config 0 descriptor?? [ 822.459469][ T1810] usb 2-1: config 0 descriptor?? [ 822.478639][ T95] chaoskey 6-1:0.0: Unable to register with hwrng [ 822.489535][ T1811] chaoskey 4-1:0.0: Unable to register with hwrng [ 822.503780][ T12] chaoskey 5-1:0.0: Unable to register with hwrng [ 822.512028][ T1810] chaoskey 2-1:0.0: Unable to register with hwrng [ 822.520028][ T1807] chaoskey 3-1:0.0: Unable to register with hwrng executing program [ 822.598565][ T94] usb 1-1: USB disconnect, device number 2 [ 822.616319][ T1816] hwrng: no data available executing program executing program executing program executing program executing program [ 822.677837][ T1807] usb 6-1: USB disconnect, device number 2 [ 822.688942][ T1810] usb 4-1: USB disconnect, device number 2 [ 822.701166][ T1814] usb 5-1: USB disconnect, device number 2 [ 822.717676][ T1827] usb 2-1: USB disconnect, device number 2 [ 822.730170][ T65] usb 3-1: USB disconnect, device number 2 [ 823.046132][ T1810] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 823.053753][ T1807] usb 6-1: new high-speed USB device number 3 using dummy_hcd [ 823.066115][ T1814] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 823.086192][ T1827] usb 2-1: new high-speed USB device number 3 using dummy_hcd [ 823.093738][ T65] usb 3-1: new high-speed USB device number 3 using dummy_hcd [ 823.156297][ T1807] usb 6-1: Using ep0 maxpacket: 8 [ 823.161498][ T1810] usb 4-1: Using ep0 maxpacket: 8 [ 823.176345][ T1814] usb 5-1: Using ep0 maxpacket: 8 [ 823.196277][ T1827] usb 2-1: Using ep0 maxpacket: 8 [ 823.201454][ T65] usb 3-1: Using ep0 maxpacket: 8 [ 823.276207][ T1807] usb 6-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 823.285359][ T1807] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 823.293526][ T1810] usb 4-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 823.302597][ T1810] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 823.311570][ T1807] usb 6-1: config 0 descriptor?? [ 823.316538][ T1814] usb 5-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 823.325870][ T1814] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 823.326353][ T1810] usb 4-1: config 0 descriptor?? [ 823.335600][ T1827] usb 2-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 823.348523][ T1827] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 823.357000][ T65] usb 3-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 823.366052][ T65] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 823.375353][ T65] usb 3-1: config 0 descriptor?? [ 823.381912][ T1814] usb 5-1: config 0 descriptor?? [ 823.384840][ T1810] chaoskey 4-1:0.0: Unable to register with hwrng [ 823.394691][ T1827] usb 2-1: config 0 descriptor?? [ 823.418420][ T65] chaoskey 3-1:0.0: Unable to register with hwrng [ 823.449365][ T1827] chaoskey 2-1:0.0: Unable to register with hwrng [ 823.457211][ T1814] chaoskey 5-1:0.0: Unable to register with hwrng executing program executing program executing program [ 823.577484][ T1807] usb 6-1: USB disconnect, device number 3 [ 823.583952][ T1814] usb 4-1: USB disconnect, device number 3 [ 823.617449][ T1810] usb 3-1: USB disconnect, device number 3 executing program executing program [ 823.648635][ T65] usb 2-1: USB disconnect, device number 3 [ 823.655302][ T1827] usb 5-1: USB disconnect, device number 3 [ 823.936117][ T1814] usb 4-1: new high-speed USB device number 4 using dummy_hcd [ 823.986145][ T1810] usb 3-1: new high-speed USB device number 4 using dummy_hcd [ 824.016124][ T1827] usb 5-1: new high-speed USB device number 4 using dummy_hcd [ 824.023699][ T65] usb 2-1: new high-speed USB device number 4 using dummy_hcd [ 824.031344][ T1814] usb 4-1: Using ep0 maxpacket: 8 [ 824.086192][ T1810] usb 3-1: Using ep0 maxpacket: 8 [ 824.126245][ T1827] usb 5-1: Using ep0 maxpacket: 8 [ 824.131481][ T65] usb 2-1: Using ep0 maxpacket: 8 [ 824.156387][ T1814] usb 4-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 824.165557][ T1814] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 824.174584][ T1814] usb 4-1: config 0 descriptor?? [ 824.206255][ T1810] usb 3-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 824.215366][ T1810] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 824.224650][ T1810] usb 3-1: config 0 descriptor?? [ 824.246280][ T1827] usb 5-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 824.255422][ T1827] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 824.263704][ T65] usb 2-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 824.272783][ T65] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 824.282484][ T65] usb 2-1: config 0 descriptor?? [ 824.285951][ T1810] chaoskey 3-1:0.0: Unable to register with hwrng [ 824.288640][ T1827] usb 5-1: config 0 descriptor?? [ 824.342667][ T65] chaoskey 2-1:0.0: Unable to register with hwrng [ 824.350062][ T1827] chaoskey 5-1:0.0: Unable to register with hwrng executing program [ 824.437511][ T1814] usb 4-1: USB disconnect, device number 4 executing program [ 824.477688][ T1810] usb 3-1: USB disconnect, device number 4 executing program executing program [ 824.537531][ T1811] usb 5-1: USB disconnect, device number 4 [ 824.537637][ T1827] usb 2-1: USB disconnect, device number 4 [ 824.846150][ T1810] usb 3-1: new high-speed USB device number 5 using dummy_hcd [ 824.906127][ T1827] usb 2-1: new high-speed USB device number 5 using dummy_hcd [ 824.916220][ T1811] usb 5-1: new high-speed USB device number 5 using dummy_hcd [ 824.936206][ T1810] usb 3-1: Using ep0 maxpacket: 8 [ 825.006239][ T1811] usb 5-1: Using ep0 maxpacket: 8 [ 825.006244][ T1827] usb 2-1: Using ep0 maxpacket: 8 [ 825.056286][ T1810] usb 3-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 825.065384][ T1810] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 825.074372][ T1810] usb 3-1: config 0 descriptor?? [ 825.146255][ T1827] usb 2-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 825.146264][ T1811] usb 5-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 825.146280][ T1811] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 825.155467][ T1827] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 825.167719][ T1811] usb 5-1: config 0 descriptor?? [ 825.180888][ T1827] usb 2-1: config 0 descriptor?? [ 825.218606][ T1811] chaoskey 5-1:0.0: Unable to register with hwrng [ 825.248306][ T1827] chaoskey 2-1:0.0: Unable to register with hwrng executing program [ 825.337515][ T1810] usb 3-1: USB disconnect, device number 5 executing program executing program [ 825.417489][ T1827] usb 5-1: USB disconnect, device number 5 [ 825.447330][ T1811] usb 2-1: USB disconnect, device number 5 [ 825.776124][ T1827] usb 5-1: new high-speed USB device number 6 using dummy_hcd [ 825.806119][ T1811] usb 2-1: new high-speed USB device number 6 using dummy_hcd [ 825.866233][ T1827] usb 5-1: Using ep0 maxpacket: 8 [ 825.896307][ T1811] usb 2-1: Using ep0 maxpacket: 8 [ 825.986365][ T1827] usb 5-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 825.995479][ T1827] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 826.004714][ T1827] usb 5-1: config 0 descriptor?? [ 826.026242][ T1811] usb 2-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 826.035478][ T1811] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 826.044457][ T1811] usb 2-1: config 0 descriptor?? [ 826.088318][ T1811] chaoskey 2-1:0.0: Unable to register with hwrng executing program executing program [ 826.267471][ T1827] usb 5-1: USB disconnect, device number 6 [ 826.287229][ T65] usb 2-1: USB disconnect, device number 6 [ 826.646127][ T65] usb 2-1: new high-speed USB device number 7 using dummy_hcd [ 826.736196][ T65] usb 2-1: Using ep0 maxpacket: 8 [ 826.856231][ T65] usb 2-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 826.865339][ T65] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 826.874250][ T65] usb 2-1: config 0 descriptor?? executing program [ 827.157291][ T65] usb 2-1: USB disconnect, device number 7 executing program executing program executing program executing program executing program executing program executing program [ 832.996166][ T94] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 833.086241][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 833.206301][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 833.215948][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 833.225200][ T94] usb 1-1: config 0 descriptor?? executing program executing program [ 833.487782][ T94] usb 1-1: USB disconnect, device number 3 [ 833.516195][ T1870] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 844.526125][ T94] usb 1-1: new high-speed USB device number 4 using dummy_hcd [ 844.616194][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 844.736228][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 844.745351][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 844.754399][ T94] usb 1-1: config 0 descriptor?? executing program [ 845.027521][ T94] usb 1-1: USB disconnect, device number 4 [ 845.046256][ T1887] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 856.036175][ T94] usb 1-1: new high-speed USB device number 5 using dummy_hcd [ 856.126227][ T94] usb 1-1: Using ep0 maxpacket: 8 executing program [ 856.246265][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 856.255785][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 856.265087][ T94] usb 1-1: config 0 descriptor?? executing program [ 856.537736][ T94] usb 1-1: USB disconnect, device number 5 [ 856.556265][ T1905] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 867.566118][ T94] usb 1-1: new high-speed USB device number 6 using dummy_hcd [ 867.656185][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 867.776227][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 867.785814][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 867.794802][ T94] usb 1-1: config 0 descriptor?? executing program [ 868.057562][ T94] usb 1-1: USB disconnect, device number 6 [ 868.086170][ T1920] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 879.076123][ T94] usb 1-1: new high-speed USB device number 7 using dummy_hcd [ 879.166197][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 879.286265][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 879.295476][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 879.304392][ T94] usb 1-1: config 0 descriptor?? executing program executing program [ 879.567577][ T94] usb 1-1: USB disconnect, device number 7 [ 879.586246][ T1937] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 889.956136][ T94] usb 1-1: new high-speed USB device number 8 using dummy_hcd [ 890.046190][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 890.166218][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 890.175445][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 890.184367][ T94] usb 1-1: config 0 descriptor?? executing program executing program [ 890.447326][ T94] usb 1-1: USB disconnect, device number 8 [ 890.466201][ T1952] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 900.836120][ T94] usb 1-1: new high-speed USB device number 9 using dummy_hcd [ 900.926223][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 901.046299][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 901.055387][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 901.064357][ T94] usb 1-1: config 0 descriptor?? executing program executing program [ 901.317558][ T94] usb 1-1: USB disconnect, device number 9 [ 901.336195][ T1968] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 911.716121][ T94] usb 1-1: new high-speed USB device number 10 using dummy_hcd [ 911.806190][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 911.926282][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 911.935421][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 911.944379][ T94] usb 1-1: config 0 descriptor?? executing program executing program [ 912.217550][ T94] usb 1-1: USB disconnect, device number 10 [ 912.236164][ T1984] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 923.236147][ T94] usb 1-1: new high-speed USB device number 11 using dummy_hcd [ 923.326199][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 923.446212][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 923.455324][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 923.464291][ T94] usb 1-1: config 0 descriptor?? executing program executing program [ 923.737514][ T94] usb 1-1: USB disconnect, device number 11 [ 923.756207][ T2000] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 934.766129][ T94] usb 1-1: new high-speed USB device number 12 using dummy_hcd [ 934.856235][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 934.976191][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 934.985289][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 934.994605][ T94] usb 1-1: config 0 descriptor?? executing program [ 935.257246][ T94] usb 1-1: USB disconnect, device number 12 [ 935.276338][ T2017] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 946.286129][ T94] usb 1-1: new high-speed USB device number 13 using dummy_hcd [ 946.376190][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 946.496201][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 946.505379][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 946.514495][ T94] usb 1-1: config 0 descriptor?? executing program [ 946.787643][ T94] usb 1-1: USB disconnect, device number 13 [ 946.806311][ T2034] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 957.806131][ T94] usb 1-1: new high-speed USB device number 14 using dummy_hcd [ 957.896178][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 958.016257][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 958.025358][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 958.034372][ T94] usb 1-1: config 0 descriptor?? executing program [ 958.297538][ T94] usb 1-1: USB disconnect, device number 14 [ 958.316308][ T2050] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 969.316117][ T94] usb 1-1: new high-speed USB device number 15 using dummy_hcd [ 969.406182][ T94] usb 1-1: Using ep0 maxpacket: 8 executing program [ 969.526331][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 969.535433][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 969.544577][ T94] usb 1-1: config 0 descriptor?? executing program [ 969.817594][ T94] usb 1-1: USB disconnect, device number 15 [ 969.836291][ T2067] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 980.836126][ T94] usb 1-1: new high-speed USB device number 16 using dummy_hcd [ 980.926195][ T94] usb 1-1: Using ep0 maxpacket: 8 [ 981.046306][ T94] usb 1-1: New USB device found, idVendor=12d8, idProduct=0001, bcdDevice=94.5d [ 981.055372][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 981.064556][ T94] usb 1-1: config 0 descriptor?? executing program executing program [ 981.317466][ T94] usb 1-1: USB disconnect, device number 16 [ 981.336232][ T2083] hwrng: no data available executing program executing program executing program executing program [ 986.246133][ T22] INFO: task kworker/1:1:65 blocked for more than 143 seconds. [ 986.253867][ T22] Not tainted 5.5.0-rc7-syzkaller #0 [ 986.259723][ T22] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 986.268541][ T22] kworker/1:1 D25696 65 2 0x80004000 [ 986.274967][ T22] Workqueue: usb_hub_wq hub_event [ 986.280029][ T22] Call Trace: [ 986.283391][ T22] ? __schedule+0x892/0x1d80 [ 986.288038][ T22] ? __sched_text_start+0x8/0x8 executing program executing program [ 986.293000][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 986.298326][ T22] schedule+0xcd/0x2b0 [ 986.302394][ T22] schedule_timeout+0x682/0xb20 [ 986.307277][ T22] ? find_held_lock+0x2d/0x110 [ 986.312053][ T22] ? usleep_range+0x160/0x160 [ 986.316791][ T22] ? mark_lock+0xbc/0x1160 [ 986.321575][ T22] ? do_raw_spin_lock+0x129/0x290 [ 986.326670][ T22] ? mark_held_locks+0x9f/0xe0 [ 986.331433][ T22] ? _raw_spin_unlock_irq+0x1f/0x30 [ 986.336657][ T22] wait_for_completion+0x26f/0x3c0 [ 986.341774][ T22] ? wait_for_completion_interruptible+0x420/0x420 [ 986.348372][ T22] ? wake_up_q+0x140/0x140 [ 986.352863][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 986.358445][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 986.363793][ T22] kthread_stop+0x17a/0x780 [ 986.368408][ T22] hwrng_unregister+0x24f/0x330 [ 986.373316][ T22] chaoskey_disconnect+0x216/0x290 [ 986.378519][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 986.383734][ T22] ? usb_autoresume_device+0x60/0x60 [ 986.389176][ T22] device_release_driver_internal+0x42f/0x500 [ 986.395285][ T22] bus_remove_device+0x2eb/0x5a0 [ 986.400363][ T22] device_del+0x481/0xd30 [ 986.404700][ T22] ? device_create_with_groups+0x120/0x120 [ 986.410648][ T22] ? usb_remove_ep_devs+0x3e/0x80 [ 986.415709][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 986.421030][ T22] usb_disable_device+0x23d/0x790 [ 986.426089][ T22] usb_disconnect+0x293/0x900 [ 986.430757][ T22] hub_event+0x1a1d/0x4300 [ 986.435222][ T22] ? hub_port_debounce+0x350/0x350 [ 986.440467][ T22] ? find_held_lock+0x2d/0x110 [ 986.445227][ T22] ? mark_held_locks+0xe0/0xe0 [ 986.450035][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 986.455763][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 986.461348][ T22] process_one_work+0x945/0x15c0 [ 986.466315][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 986.471669][ T22] ? do_raw_spin_lock+0x129/0x290 [ 986.476740][ T22] worker_thread+0x7ab/0xe20 [ 986.482120][ T22] ? process_one_work+0x15c0/0x15c0 [ 986.487350][ T22] kthread+0x318/0x420 [ 986.491415][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 986.496835][ T22] ret_from_fork+0x24/0x30 [ 986.501315][ T22] INFO: task kworker/0:0:1807 blocked for more than 143 seconds. [ 986.509289][ T22] Not tainted 5.5.0-rc7-syzkaller #0 [ 986.515074][ T22] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 986.523770][ T22] kworker/0:0 D25968 1807 2 0x80004000 [ 986.530136][ T22] Workqueue: usb_hub_wq hub_event [ 986.535136][ T22] Call Trace: [ 986.538464][ T22] ? __schedule+0x892/0x1d80 [ 986.543065][ T22] ? __sched_text_start+0x8/0x8 [ 986.547986][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 986.553282][ T22] schedule+0xcd/0x2b0 [ 986.557374][ T22] schedule_timeout+0x682/0xb20 [ 986.562402][ T22] ? find_held_lock+0x2d/0x110 [ 986.567197][ T22] ? usleep_range+0x160/0x160 [ 986.571870][ T22] ? mark_lock+0xbc/0x1160 [ 986.576324][ T22] ? do_raw_spin_lock+0x129/0x290 [ 986.581342][ T22] ? mark_held_locks+0x9f/0xe0 [ 986.586161][ T22] ? _raw_spin_unlock_irq+0x1f/0x30 [ 986.591351][ T22] wait_for_completion+0x26f/0x3c0 [ 986.596487][ T22] ? wait_for_completion_interruptible+0x420/0x420 [ 986.602975][ T22] ? wake_up_q+0x140/0x140 [ 986.607425][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 986.612979][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 986.618297][ T22] kthread_stop+0x17a/0x780 [ 986.622794][ T22] hwrng_unregister+0x24f/0x330 [ 986.627832][ T22] chaoskey_disconnect+0x216/0x290 [ 986.632957][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 986.638204][ T22] ? usb_autoresume_device+0x60/0x60 [ 986.643549][ T22] device_release_driver_internal+0x42f/0x500 [ 986.649647][ T22] bus_remove_device+0x2eb/0x5a0 [ 986.654583][ T22] device_del+0x481/0xd30 [ 986.658937][ T22] ? device_create_with_groups+0x120/0x120 [ 986.664750][ T22] ? usb_remove_ep_devs+0x3e/0x80 [ 986.669824][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 986.677007][ T22] usb_disable_device+0x23d/0x790 [ 986.682029][ T22] usb_disconnect+0x293/0x900 [ 986.686873][ T22] hub_event+0x1a1d/0x4300 [ 986.691288][ T22] ? hub_port_debounce+0x350/0x350 [ 986.696428][ T22] ? find_held_lock+0x2d/0x110 [ 986.701185][ T22] ? mark_held_locks+0xe0/0xe0 [ 986.705943][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 986.711527][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 986.716846][ T22] process_one_work+0x945/0x15c0 [ 986.721791][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 986.727336][ T22] ? do_raw_spin_lock+0x129/0x290 [ 986.732378][ T22] worker_thread+0x7ab/0xe20 [ 986.737003][ T22] ? process_one_work+0x15c0/0x15c0 [ 986.742203][ T22] kthread+0x318/0x420 [ 986.746328][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 986.751728][ T22] ret_from_fork+0x24/0x30 [ 986.756450][ T22] INFO: task kworker/0:3:1810 blocked for more than 143 seconds. [ 986.764388][ T22] Not tainted 5.5.0-rc7-syzkaller #0 [ 986.770238][ T22] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 986.778954][ T22] kworker/0:3 D25544 1810 2 0x80004000 [ 986.785284][ T22] Workqueue: usb_hub_wq hub_event [ 986.790332][ T22] Call Trace: [ 986.793628][ T22] ? __schedule+0x892/0x1d80 [ 986.798252][ T22] ? __sched_text_start+0x8/0x8 [ 986.803107][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 986.808444][ T22] schedule+0xcd/0x2b0 [ 986.812619][ T22] schedule_timeout+0x682/0xb20 [ 986.817510][ T22] ? find_held_lock+0x2d/0x110 [ 986.822287][ T22] ? usleep_range+0x160/0x160 [ 986.826990][ T22] ? mark_lock+0xbc/0x1160 [ 986.831408][ T22] ? do_raw_spin_lock+0x129/0x290 [ 986.836577][ T22] ? mark_held_locks+0x9f/0xe0 [ 986.841343][ T22] ? _raw_spin_unlock_irq+0x1f/0x30 [ 986.846575][ T22] wait_for_completion+0x26f/0x3c0 [ 986.851747][ T22] ? wait_for_completion_interruptible+0x420/0x420 [ 986.858269][ T22] ? wake_up_q+0x140/0x140 [ 986.862680][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 986.868374][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 986.873666][ T22] kthread_stop+0x17a/0x780 [ 986.878260][ T22] hwrng_unregister+0x24f/0x330 [ 986.883258][ T22] chaoskey_disconnect+0x216/0x290 [ 986.888606][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 986.893827][ T22] ? usb_autoresume_device+0x60/0x60 [ 986.899826][ T22] device_release_driver_internal+0x42f/0x500 [ 986.905923][ T22] bus_remove_device+0x2eb/0x5a0 [ 986.910893][ T22] device_del+0x481/0xd30 [ 986.917430][ T22] ? device_create_with_groups+0x120/0x120 [ 986.923240][ T22] ? usb_remove_ep_devs+0x3e/0x80 [ 986.928296][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 986.933585][ T22] usb_disable_device+0x23d/0x790 [ 986.938645][ T22] usb_disconnect+0x293/0x900 [ 986.943448][ T22] hub_event+0x1a1d/0x4300 [ 986.947898][ T22] ? hub_port_debounce+0x350/0x350 [ 986.953125][ T22] ? find_held_lock+0x2d/0x110 [ 986.957919][ T22] ? mark_held_locks+0xe0/0xe0 [ 986.962681][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 986.968260][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 986.973674][ T22] process_one_work+0x945/0x15c0 [ 986.978745][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 986.984128][ T22] ? do_raw_spin_lock+0x129/0x290 [ 986.989213][ T22] worker_thread+0x7ab/0xe20 [ 986.993805][ T22] ? process_one_work+0x15c0/0x15c0 [ 986.999068][ T22] kthread+0x318/0x420 [ 987.003134][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 987.008540][ T22] ret_from_fork+0x24/0x30 [ 987.013011][ T22] INFO: task kworker/1:0:1814 blocked for more than 144 seconds. [ 987.021031][ T22] Not tainted 5.5.0-rc7-syzkaller #0 [ 987.026913][ T22] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 987.035755][ T22] kworker/1:0 D25560 1814 2 0x80004000 [ 987.042157][ T22] Workqueue: usb_hub_wq hub_event [ 987.047226][ T22] Call Trace: [ 987.050649][ T22] ? __schedule+0x892/0x1d80 [ 987.055332][ T22] ? __sched_text_start+0x8/0x8 [ 987.060320][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 987.065610][ T22] schedule+0xcd/0x2b0 [ 987.069715][ T22] schedule_timeout+0x682/0xb20 [ 987.074581][ T22] ? find_held_lock+0x2d/0x110 [ 987.079400][ T22] ? usleep_range+0x160/0x160 [ 987.084076][ T22] ? mark_lock+0xbc/0x1160 [ 987.088562][ T22] ? do_raw_spin_lock+0x129/0x290 [ 987.093593][ T22] ? mark_held_locks+0x9f/0xe0 [ 987.098395][ T22] ? _raw_spin_unlock_irq+0x1f/0x30 [ 987.103597][ T22] wait_for_completion+0x26f/0x3c0 [ 987.108747][ T22] ? wait_for_completion_interruptible+0x420/0x420 [ 987.115261][ T22] ? wake_up_q+0x140/0x140 [ 987.119754][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 987.125304][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 987.130626][ T22] kthread_stop+0x17a/0x780 [ 987.135128][ T22] hwrng_unregister+0x24f/0x330 [ 987.140085][ T22] chaoskey_disconnect+0x216/0x290 executing program [ 987.145203][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 987.150624][ T22] ? usb_autoresume_device+0x60/0x60 [ 987.155913][ T22] device_release_driver_internal+0x42f/0x500 [ 987.162021][ T22] bus_remove_device+0x2eb/0x5a0 [ 987.167051][ T22] device_del+0x481/0xd30 [ 987.171379][ T22] ? device_create_with_groups+0x120/0x120 [ 987.177310][ T22] ? usb_remove_ep_devs+0x3e/0x80 [ 987.182345][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 987.187696][ T22] usb_disable_device+0x23d/0x790 [ 987.192735][ T22] usb_disconnect+0x293/0x900 [ 987.197458][ T22] hub_event+0x1a1d/0x4300 [ 987.201939][ T22] ? hub_port_debounce+0x350/0x350 [ 987.207398][ T22] ? find_held_lock+0x2d/0x110 [ 987.212198][ T22] ? mark_held_locks+0xe0/0xe0 [ 987.217011][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 987.222556][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 987.227923][ T22] process_one_work+0x945/0x15c0 [ 987.232870][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 987.238342][ T22] ? do_raw_spin_lock+0x129/0x290 [ 987.243389][ T22] worker_thread+0x7ab/0xe20 [ 987.248187][ T22] ? process_one_work+0x15c0/0x15c0 [ 987.253461][ T22] kthread+0x318/0x420 [ 987.257569][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 987.262951][ T22] ret_from_fork+0x24/0x30 [ 987.267721][ T22] INFO: task kworker/1:3:1827 blocked for more than 144 seconds. [ 987.275585][ T22] Not tainted 5.5.0-rc7-syzkaller #0 [ 987.281544][ T22] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 987.290230][ T22] kworker/1:3 D24592 1827 2 0x80004000 [ 987.296604][ T22] Workqueue: usb_hub_wq hub_event [ 987.301737][ T22] Call Trace: [ 987.305030][ T22] ? __schedule+0x892/0x1d80 [ 987.309732][ T22] ? __sched_text_start+0x8/0x8 [ 987.314591][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 987.319911][ T22] schedule+0xcd/0x2b0 [ 987.323984][ T22] schedule_timeout+0x682/0xb20 [ 987.328881][ T22] ? find_held_lock+0x2d/0x110 [ 987.333786][ T22] ? usleep_range+0x160/0x160 [ 987.338535][ T22] ? mark_lock+0xbc/0x1160 [ 987.342970][ T22] ? do_raw_spin_lock+0x129/0x290 [ 987.348165][ T22] ? mark_held_locks+0x9f/0xe0 [ 987.352993][ T22] ? _raw_spin_unlock_irq+0x1f/0x30 [ 987.358282][ T22] wait_for_completion+0x26f/0x3c0 [ 987.363450][ T22] ? wait_for_completion_interruptible+0x420/0x420 [ 987.369983][ T22] ? wake_up_q+0x140/0x140 [ 987.374403][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 987.380214][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 987.385510][ T22] kthread_stop+0x17a/0x780 [ 987.390060][ T22] hwrng_unregister+0x24f/0x330 [ 987.394972][ T22] chaoskey_disconnect+0x216/0x290 [ 987.400114][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 987.405318][ T22] ? usb_autoresume_device+0x60/0x60 [ 987.410643][ T22] device_release_driver_internal+0x42f/0x500 [ 987.416726][ T22] bus_remove_device+0x2eb/0x5a0 [ 987.421656][ T22] device_del+0x481/0xd30 [ 987.425986][ T22] ? device_create_with_groups+0x120/0x120 [ 987.431840][ T22] ? usb_remove_ep_devs+0x3e/0x80 [ 987.436892][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 987.442180][ T22] usb_disable_device+0x23d/0x790 [ 987.447281][ T22] usb_disconnect+0x293/0x900 [ 987.451962][ T22] hub_event+0x1a1d/0x4300 [ 987.456409][ T22] ? hub_port_debounce+0x350/0x350 [ 987.461517][ T22] ? find_held_lock+0x2d/0x110 [ 987.466353][ T22] ? mark_held_locks+0xe0/0xe0 [ 987.471119][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 987.476695][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 987.482082][ T22] process_one_work+0x945/0x15c0 [ 987.487159][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 987.492535][ T22] ? do_raw_spin_lock+0x129/0x290 [ 987.497730][ T22] worker_thread+0x7ab/0xe20 [ 987.502568][ T22] ? process_one_work+0x15c0/0x15c0 [ 987.507792][ T22] kthread+0x318/0x420 [ 987.511862][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 987.517322][ T22] ret_from_fork+0x24/0x30 [ 987.521781][ T22] [ 987.521781][ T22] Showing all locks held in the system: [ 987.529544][ T22] 1 lock held by khungtaskd/22: [ 987.534389][ T22] #0: ffffffff871055a0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x264 [ 987.543727][ T22] 5 locks held by kworker/1:1/65: [ 987.548766][ T22] #0: ffff8881d885d128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x15c0 [ 987.558964][ T22] #1: ffff8881d8d27dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x15c0 [ 987.569851][ T22] #2: ffff8881d4d47200 (&dev->mutex){....}, at: hub_event+0x1be/0x4300 [ 987.578217][ T22] #3: ffff8881cbb04200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x900 [ 987.586846][ T22] #4: ffff8881cbb05190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 987.597121][ T22] 5 locks held by kworker/1:2/94: [ 987.602348][ T22] #0: ffff8881d885d128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x15c0 [ 987.612599][ T22] #1: ffff8881d5d47dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x15c0 [ 987.623330][ T22] #2: ffff8881d4d40200 (&dev->mutex){....}, at: hub_event+0x1be/0x4300 [ 987.631693][ T22] #3: ffff8881c9898200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x900 [ 987.640428][ T22] #4: ffff8881c9899190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 987.650459][ T22] 1 lock held by rsyslogd/1676: [ 987.655286][ T22] #0: ffff8881cfd38d60 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 [ 987.664010][ T22] 2 locks held by getty/1766: [ 987.668699][ T22] #0: ffff8881cf3e6090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 987.677980][ T22] #1: ffffc900004792e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 987.687625][ T22] 2 locks held by getty/1767: [ 987.692305][ T22] #0: ffff8881cf3e7090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 987.701706][ T22] #1: ffffc9000047d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 987.711299][ T22] 2 locks held by getty/1768: [ 987.715954][ T22] #0: ffff8881ce989090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 987.725328][ T22] #1: ffffc9000049d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 987.734977][ T22] 2 locks held by getty/1769: [ 987.739864][ T22] #0: ffff8881cf71d090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 987.749121][ T22] #1: ffffc900004952e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 987.758707][ T22] 2 locks held by getty/1770: [ 987.763374][ T22] #0: ffff8881cf1ab090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 987.775073][ T22] #1: ffffc9000048d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 987.784663][ T22] 2 locks held by getty/1771: [ 987.789366][ T22] #0: ffff8881cefb5090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 987.798598][ T22] #1: ffffc900004852e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 987.808297][ T22] 2 locks held by getty/1772: [ 987.812962][ T22] #0: ffff8881cf097090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 987.822300][ T22] #1: ffffc9000046d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 987.832150][ T22] 1 lock held by syz-executor315/1800: [ 987.837640][ T22] #0: ffff8881db234458 (&rq->lock){-.-.}, at: __schedule+0x21c/0x1d80 [ 987.845907][ T22] 5 locks held by kworker/0:0/1807: [ 987.851152][ T22] #0: ffff8881d885d128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x15c0 [ 987.861388][ T22] #1: ffff8881ce377dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x15c0 [ 987.872133][ T22] #2: ffff8881d4e2b200 (&dev->mutex){....}, at: hub_event+0x1be/0x4300 [ 987.880544][ T22] #3: ffff8881cd6ba200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x900 [ 987.889202][ T22] #4: ffff8881cd6bc190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 987.899288][ T22] 5 locks held by kworker/0:3/1810: [ 987.904477][ T22] #0: ffff8881d885d128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x15c0 [ 987.914756][ T22] #1: ffff8881d1837dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x15c0 [ 987.925647][ T22] #2: ffff8881d4d86200 (&dev->mutex){....}, at: hub_event+0x1be/0x4300 [ 987.934023][ T22] #3: ffff8881cbd90200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x900 [ 987.942663][ T22] #4: ffff8881cbd92190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 987.953436][ T22] 5 locks held by kworker/1:0/1814: [ 987.958660][ T22] #0: ffff8881d885d128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x15c0 [ 987.968858][ T22] #1: ffff8881cd8e7dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x15c0 [ 987.979580][ T22] #2: ffff8881d4de5200 (&dev->mutex){....}, at: hub_event+0x1be/0x4300 [ 987.987953][ T22] #3: ffff8881ccfc3200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x900 [ 987.996604][ T22] #4: ffff8881ccfc6190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 988.006727][ T22] 5 locks held by kworker/1:3/1827: [ 988.011912][ T22] #0: ffff8881d885d128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x15c0 [ 988.022095][ T22] #1: ffff8881cda2fdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x15c0 [ 988.032842][ T22] #2: ffff8881d4e0c200 (&dev->mutex){....}, at: hub_event+0x1be/0x4300 [ 988.041216][ T22] #3: ffff8881cc3ff200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x900 [ 988.050108][ T22] #4: ffff8881cbb00190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 988.060148][ T22] [ 988.062574][ T22] ============================================= [ 988.062574][ T22] [ 988.071019][ T22] NMI backtrace for cpu 1 [ 988.075458][ T22] CPU: 1 PID: 22 Comm: khungtaskd Not tainted 5.5.0-rc7-syzkaller #0 [ 988.083567][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 988.093662][ T22] Call Trace: [ 988.096985][ T22] dump_stack+0xef/0x16e [ 988.101450][ T22] ? x86_vector_activate.cold+0xb0/0xdd [ 988.106988][ T22] nmi_cpu_backtrace.cold+0x70/0xb1 [ 988.112210][ T22] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 988.117828][ T22] nmi_trigger_cpumask_backtrace+0x1db/0x207 [ 988.123875][ T22] watchdog+0xa99/0xfd0 [ 988.128055][ T22] ? reset_hung_task_detector+0x30/0x30 [ 988.133599][ T22] kthread+0x318/0x420 [ 988.137653][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 988.143065][ T22] ret_from_fork+0x24/0x30 [ 988.147524][ T22] Sending NMI from CPU 1 to CPUs 0: [ 988.152786][ C0] NMI backtrace for cpu 0 skipped: idling at default_idle+0x28/0x300 [ 988.153728][ T22] Kernel panic - not syncing: hung_task: blocked tasks [ 988.167832][ T22] CPU: 1 PID: 22 Comm: khungtaskd Not tainted 5.5.0-rc7-syzkaller #0 [ 988.175878][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 988.186074][ T22] Call Trace: [ 988.189385][ T22] dump_stack+0xef/0x16e [ 988.193678][ T22] panic+0x2aa/0x6e1 [ 988.197566][ T22] ? add_taint.cold+0x16/0x16 [ 988.202263][ T22] ? cpumask_next+0x3c/0x40 [ 988.206802][ T22] ? printk_safe_flush+0xd9/0x120 [ 988.211815][ T22] ? watchdog+0xa99/0xfd0 [ 988.216129][ T22] ? nmi_trigger_cpumask_backtrace+0x1b3/0x207 [ 988.223117][ T22] watchdog+0xaaa/0xfd0 [ 988.227254][ T22] ? reset_hung_task_detector+0x30/0x30 [ 988.232791][ T22] kthread+0x318/0x420 [ 988.236882][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 988.242261][ T22] ret_from_fork+0x24/0x30 [ 988.247510][ T22] Kernel Offset: disabled [ 988.251949][ T22] Rebooting in 86400 seconds..