[ 470.706473] devpts: called with bogus options [ 470.730807] devpts: called with bogus options [ 470.738038] devpts: called with bogus options [ 470.748543] devpts: called with bogus options [ 470.755579] devpts: called with bogus options [ 470.785997] devpts: called with bogus options [ 470.818031] devpts: called with bogus options [ 470.834004] devpts: called with bogus options [ 470.835033] devpts: called with bogus options [ 470.867082] devpts: called with bogus options [ 470.883347] devpts: called with bogus options [ 470.895275] devpts: called with bogus options [ 470.909123] devpts: called with bogus options [ 470.914633] devpts: called with bogus options [ 471.057517] devpts: called with bogus options [ 471.064708] devpts: called with bogus options [ 471.068224] devpts: called with bogus options [ 471.073359] devpts: called with bogus options [ 471.082005] devpts: called with bogus options [ 471.104630] devpts: called with bogus options [ 471.132009] devpts: called with bogus options [ 471.162934] devpts: called with bogus options [ 471.185602] devpts: called with bogus options [ 471.208790] devpts: called with bogus options [ 471.220512] devpts: called with bogus options [ 471.226005] devpts: called with bogus options [ 471.233231] devpts: called with bogus options [ 471.250297] devpts: called with bogus options [ 471.263696] devpts: called with bogus options [ 471.292870] devpts: called with bogus options [ 471.304669] devpts: called with bogus options [ 471.321081] devpts: called with bogus options [ 471.331873] devpts: called with bogus options [ 471.387408] devpts: called with bogus options [ 471.400761] devpts: called with bogus options [ 471.405561] devpts: called with bogus options [ 471.413883] devpts: called with bogus options [ 471.466073] devpts: called with bogus options [ 471.474316] devpts: called with bogus options [ 471.480155] devpts: called with bogus options [ 471.485215] devpts: called with bogus options [ 471.514653] devpts: called with bogus options [ 471.533492] devpts: called with bogus options [ 472.312050] device bridge_slave_1 left promiscuous mode [ 472.317938] bridge0: port 2(bridge_slave_1) entered disabled state [ 472.382266] device bridge_slave_0 left promiscuous mode [ 472.387767] bridge0: port 1(bridge_slave_0) entered disabled state [ 472.521615] device hsr_slave_1 left promiscuous mode [ 472.573669] device hsr_slave_0 left promiscuous mode [ 472.614091] team0 (unregistering): Port device team_slave_1 removed [ 472.623945] team0 (unregistering): Port device team_slave_0 removed [ 472.635258] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 472.702329] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 472.784408] bond0 (unregistering): Released all slaves [ 475.043642] device bridge_slave_1 left promiscuous mode [ 475.049131] bridge0: port 2(bridge_slave_1) entered disabled state [ 475.090082] device bridge_slave_0 left promiscuous mode [ 475.095663] bridge0: port 1(bridge_slave_0) entered disabled state [ 475.130670] device bridge_slave_1 left promiscuous mode [ 475.136268] bridge0: port 2(bridge_slave_1) entered disabled state [ 475.189990] device bridge_slave_0 left promiscuous mode [ 475.195445] bridge0: port 1(bridge_slave_0) entered disabled state [ 475.241190] device bridge_slave_1 left promiscuous mode [ 475.246790] bridge0: port 2(bridge_slave_1) entered disabled state [ 475.310486] device bridge_slave_0 left promiscuous mode [ 475.316452] bridge0: port 1(bridge_slave_0) entered disabled state [ 475.361330] device bridge_slave_1 left promiscuous mode [ 475.366987] bridge0: port 2(bridge_slave_1) entered disabled state [ 475.430012] device bridge_slave_0 left promiscuous mode [ 475.435540] bridge0: port 1(bridge_slave_0) entered disabled state [ 475.481204] device bridge_slave_1 left promiscuous mode [ 475.487125] bridge0: port 2(bridge_slave_1) entered disabled state [ 475.550076] device bridge_slave_0 left promiscuous mode [ 475.555553] bridge0: port 1(bridge_slave_0) entered disabled state [ 475.793826] device hsr_slave_1 left promiscuous mode [ 475.843988] device hsr_slave_0 left promiscuous mode [ 475.922206] team0 (unregistering): Port device team_slave_1 removed [ 475.933133] team0 (unregistering): Port device team_slave_0 removed [ 475.943206] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 475.983858] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 476.044237] bond0 (unregistering): Released all slaves [ 476.160968] device hsr_slave_1 left promiscuous mode [ 476.201741] device hsr_slave_0 left promiscuous mode [ 476.243346] team0 (unregistering): Port device team_slave_1 removed [ 476.257386] team0 (unregistering): Port device team_slave_0 removed [ 476.267649] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 476.332452] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 476.401495] bond0 (unregistering): Released all slaves [ 476.532606] device hsr_slave_1 left promiscuous mode [ 476.581629] device hsr_slave_0 left promiscuous mode [ 476.621725] team0 (unregistering): Port device team_slave_1 removed [ 476.633354] team0 (unregistering): Port device team_slave_0 removed [ 476.642367] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 476.693305] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 476.750571] bond0 (unregistering): Released all slaves [ 476.851565] device hsr_slave_1 left promiscuous mode [ 476.913387] device hsr_slave_0 left promiscuous mode [ 476.982014] team0 (unregistering): Port device team_slave_1 removed [ 476.991890] team0 (unregistering): Port device team_slave_0 removed [ 477.001443] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 477.053509] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 477.143340] bond0 (unregistering): Released all slaves [ 477.241883] device hsr_slave_1 left promiscuous mode [ 477.311651] device hsr_slave_0 left promiscuous mode [ 477.371856] team0 (unregistering): Port device team_slave_1 removed [ 477.381643] team0 (unregistering): Port device team_slave_0 removed [ 477.390929] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 477.423965] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 477.501597] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.1.41' (ECDSA) to the list of known hosts. [ 477.681579] IPVS: ftp: loaded support on port[0] = 21 [ 477.685745] IPVS: ftp: loaded support on port[0] = 21 [ 477.708229] IPVS: ftp: loaded support on port[0] = 21 [ 477.710670] IPVS: ftp: loaded support on port[0] = 21 [ 477.726464] IPVS: ftp: loaded support on port[0] = 21 [ 477.727781] IPVS: ftp: loaded support on port[0] = 21 [ 477.823503] audit: type=1400 audit(1578916643.845:41): avc: denied { write } for pid=16805 comm="syz-executor447" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 477.841288] devpts: called with bogus options [ 477.863213] audit: type=1400 audit(1578916643.845:42): avc: denied { read } for pid=16808 comm="syz-executor447" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 477.905556] devpts: called with bogus options [ 477.954388] devpts: called with bogus options [ 477.964022] devpts: called with bogus options [ 477.969076] devpts: called with bogus options [ 477.981053] devpts: called with bogus options [ 477.991466] devpts: called with bogus options [ 478.022174] devpts: called with bogus options [ 478.091873] devpts: called with bogus options [ 478.157260] devpts: called with bogus options [ 478.430720] devpts: called with bogus options [ 478.576682] devpts: called with bogus options [ 478.586125] devpts: called with bogus options [ 478.663091] devpts: called with bogus options [ 478.663553] devpts: called with bogus options [ 479.101130] devpts: called with bogus options [ 479.115909] devpts: called with bogus options [ 479.141906] devpts: called with bogus options [ 479.145140] devpts: called with bogus options [ 479.150026] devpts: called with bogus options [ 479.219131] devpts: called with bogus options [ 479.227140] devpts: called with bogus options [ 479.238451] devpts: called with bogus options [ 479.246824] devpts: called with bogus options [ 479.249059] devpts: called with bogus options [ 479.270690] devpts: called with bogus options [ 479.794644] devpts: called with bogus options [ 479.796749] devpts: called with bogus options [ 479.825940] devpts: called with bogus options [ 479.830967] devpts: called with bogus options [ 479.833831] devpts: called with bogus options [ 479.841403] devpts: called with bogus options [ 479.861390] devpts: called with bogus options [ 479.861459] devpts: called with bogus options [ 479.879630] devpts: called with bogus options [ 480.599204] devpts: called with bogus options [ 480.613772] devpts: called with bogus options [ 480.615883] devpts: called with bogus options [ 480.624120] devpts: called with bogus options [ 480.642029] devpts: called with bogus options [ 480.653668] devpts: called with bogus options [ 480.654252] devpts: called with bogus options [ 481.233119] devpts: called with bogus options [ 481.241895] devpts: called with bogus options [ 481.245940] devpts: called with bogus options [ 481.252314] devpts: called with bogus options [ 481.260557] devpts: called with bogus options [ 481.267445] devpts: called with bogus options [ 481.763498] devpts: called with bogus options [ 481.763952] devpts: called with bogus options [ 481.774043] devpts: called with bogus options [ 481.780946] devpts: called with bogus options [ 481.782009] devpts: called with bogus options [ 481.805926] devpts: called with bogus options [ 482.105501] devpts: called with bogus options [ 482.164448] devpts: called with bogus options [ 482.175476] devpts: called with bogus options [ 482.175477] devpts: called with bogus options [ 482.187838] devpts: called with bogus options [ 482.237032] devpts: called with bogus options [ 482.245460] devpts: called with bogus options [ 482.504520] devpts: called with bogus options [ 482.629694] devpts: called with bogus options [ 482.637424] devpts: called with bogus options [ 482.646452] devpts: called with bogus options [ 482.715552] devpts: called with bogus options [ 482.715602] devpts: called with bogus options [ 482.728080] devpts: called with bogus options [ 482.801145] devpts: called with bogus options [ 482.974491] devpts: called with bogus options [ 483.126136] devpts: called with bogus options [ 483.181966] devpts: called with bogus options [ 483.263716] devpts: called with bogus options [ 483.399113] devpts: called with bogus options [ 483.406565] devpts: called with bogus options [ 483.546993] devpts: called with bogus options [ 483.548149] devpts: called with bogus options [ 483.746378] devpts: called with bogus options [ 483.747740] devpts: called with bogus options [ 483.761380] devpts: called with bogus options [ 483.882210] devpts: called with bogus options [ 483.882481] devpts: called with bogus options [ 483.898808] devpts: called with bogus options [ 484.103675] devpts: called with bogus options [ 484.317028] devpts: called with bogus options [ 484.323267] devpts: called with bogus options [ 484.419609] devpts: called with bogus options [ 484.423867] devpts: called with bogus options [ 484.434955] devpts: called with bogus options [ 484.583789] devpts: called with bogus options [ 484.646676] devpts: called with bogus options [ 484.695707] devpts: called with bogus options [ 484.843261] devpts: called with bogus options [ 484.917435] devpts: called with bogus options [ 484.995997] devpts: called with bogus options [ 484.997778] devpts: called with bogus options [ 485.012108] devpts: called with bogus options [ 485.080171] devpts: called with bogus options [ 485.156600] devpts: called with bogus options [ 485.340277] devpts: called with bogus options [ 485.423904] devpts: called with bogus options [ 485.557589] devpts: called with bogus options [ 485.634056] devpts: called with bogus options [ 485.726821] devpts: called with bogus options [ 485.727088] devpts: called with bogus options [ 485.806452] devpts: called with bogus options [ 485.905303] devpts: called with bogus options [ 486.064869] devpts: called with bogus options [ 486.145643] devpts: called with bogus options [ 486.244606] devpts: called with bogus options [ 486.251926] devpts: called with bogus options [ 486.293823] devpts: called with bogus options [ 486.376292] devpts: called with bogus options [ 486.502708] devpts: called with bogus options [ 486.590195] devpts: called with bogus options [ 486.667043] devpts: called with bogus options [ 486.667951] devpts: called with bogus options [ 486.768678] devpts: called with bogus options [ 486.844729] devpts: called with bogus options [ 487.026203] devpts: called with bogus options [ 487.093821] devpts: called with bogus options [ 487.175928] devpts: called with bogus options [ 487.177247] devpts: called with bogus options [ 487.193189] devpts: called with bogus options [ 487.258788] devpts: called with bogus options [ 487.303080] devpts: called with bogus options [ 487.556784] devpts: called with bogus options [ 487.644858] devpts: called with bogus options [ 487.723656] devpts: called with bogus options [ 487.731242] devpts: called with bogus options [ 487.806214] devpts: called with bogus options [ 487.921792] devpts: called with bogus options [ 488.082782] devpts: called with bogus options [ 488.184463] devpts: called with bogus options [ 488.250510] devpts: called with bogus options [ 488.262644] devpts: called with bogus options [ 488.353210] devpts: called with bogus options [ 488.416474] devpts: called with bogus options [ 488.573981] devpts: called with bogus options [ 488.644084] devpts: called with bogus options [ 488.707709] devpts: called with bogus options [ 488.713401] devpts: called with bogus options [ 488.773378] devpts: called with bogus options [ 488.854693] devpts: called with bogus options [ 489.006466] devpts: called with bogus options [ 489.064310] devpts: called with bogus options [ 489.127822] devpts: called with bogus options [ 489.128495] devpts: called with bogus options [ 489.188990] devpts: called with bogus options [ 489.255256] devpts: called with bogus options [ 489.342150] devpts: called with bogus options [ 489.408974] devpts: called with bogus options [ 489.412071] devpts: called with bogus options [ 489.426556] devpts: called with bogus options [ 489.504559] devpts: called with bogus options [ 489.866111] devpts: called with bogus options [ 490.041360] devpts: called with bogus options [ 490.056586] devpts: called with bogus options [ 490.067270] devpts: called with bogus options [ 490.069028] devpts: called with bogus options [ 490.087577] devpts: called with bogus options [ 490.088856] devpts: called with bogus options [ 490.104536] devpts: called with bogus options [ 490.300429] devpts: called with bogus options [ 490.462605] devpts: called with bogus options [ 490.471541] devpts: called with bogus options [ 490.563422] devpts: called with bogus options [ 490.645158] devpts: called with bogus options [ 490.794024] devpts: called with bogus options [ 490.883672] devpts: called with bogus options [ 490.946122] devpts: called with bogus options [ 490.963690] devpts: called with bogus options [ 490.972680] devpts: called with bogus options [ 490.974065] devpts: called with bogus options [ 491.383389] devpts: called with bogus options [ 491.464427] devpts: called with bogus options [ 491.473751] devpts: called with bogus options [ 491.477958] devpts: called with bogus options [ 491.483857] devpts: called with bogus options [ 491.491876] devpts: called with bogus options [ 491.566909] devpts: called with bogus options [ 491.566910] devpts: called with bogus options [ 491.587021] devpts: called with bogus options [ 491.594995] devpts: called with bogus options [ 491.594996] devpts: called with bogus options [ 491.608006] devpts: called with bogus options [ 491.615641] devpts: called with bogus options [ 492.016698] devpts: called with bogus options [ 492.029583] devpts: called with bogus options [ 492.076857] devpts: called with bogus options [ 492.078131] devpts: called with bogus options [ 492.293680] devpts: called with bogus options [ 492.428751] devpts: called with bogus options [ 492.438381] devpts: called with bogus options [ 492.441481] devpts: called with bogus options [ 492.446711] devpts: called with bogus options [ 492.451246] devpts: called with bogus options [ 492.827728] devpts: called with bogus options [ 492.830446] devpts: called with bogus options [ 492.841358] devpts: called with bogus options [ 492.847398] devpts: called with bogus options [ 492.915094] devpts: called with bogus options [ 492.922086] devpts: called with bogus options [ 493.244382] devpts: called with bogus options [ 493.412340] devpts: called with bogus options [ 493.425509] devpts: called with bogus options [ 493.430368] devpts: called with bogus options [ 493.433759] devpts: called with bogus options [ 493.437220] devpts: called with bogus options [ 493.955833] devpts: called with bogus options [ 493.968384] devpts: called with bogus options [ 493.976476] devpts: called with bogus options [ 493.977381] devpts: called with bogus options [ 493.992514] devpts: called with bogus options [ 493.995334] devpts: called with bogus options [ 494.008173] devpts: called with bogus options [ 494.352604] devpts: called with bogus options [ 494.616692] devpts: called with bogus options [ 494.624518] devpts: called with bogus options [ 494.633398] devpts: called with bogus options [ 494.643271] devpts: called with bogus options [ 494.713593] devpts: called with bogus options [ 494.955400] devpts: called with bogus options [ 495.126781] devpts: called with bogus options [ 495.135171] devpts: called with bogus options [ 495.138362] devpts: called with bogus options [ 495.207211] devpts: called with bogus options [ 495.212305] devpts: called with bogus options [ 495.231195] devpts: called with bogus options [ 495.493198] devpts: called with bogus options [ 495.757188] devpts: called with bogus options [ 495.759140] devpts: called with bogus options [ 495.770033] devpts: called with bogus options [ 495.835446] devpts: called with bogus options [ 495.850222] devpts: called with bogus options [ 495.912096] devpts: called with bogus options [ 496.077497] devpts: called with bogus options [ 496.232805] devpts: called with bogus options [ 496.241854] devpts: called with bogus options [ 496.332740] devpts: called with bogus options [ 496.342031] devpts: called with bogus options [ 496.345063] devpts: called with bogus options [ 496.352638] devpts: called with bogus options [ 496.390524] ================================================================== [ 496.398147] BUG: KASAN: use-after-free in debugfs_remove+0xd3/0xf0 [ 496.398154] Read of size 8 at addr ffff88806afc55c0 by task kworker/0:0/7206 [ 496.411663] [ 496.411673] CPU: 0 PID: 7206 Comm: kworker/0:0 Not tainted 4.19.95-syzkaller #0 [ 496.411676] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 496.411755] Workqueue: events __blk_release_queue [ 496.420820] Call Trace: [ 496.420929] dump_stack+0x123/0x177 [ 496.420970] print_address_description.cold.8+0x9/0x1ff [ 496.435153] kasan_report.cold.9+0x242/0x309 [ 496.435162] ? debugfs_remove+0xd3/0xf0 [ 496.435171] __asan_report_load8_noabort+0x14/0x20 [ 496.435177] debugfs_remove+0xd3/0xf0 [ 496.435264] blk_trace_free+0x30/0x130 [ 496.435270] __blk_trace_remove+0x57/0x80 [ 496.441470] blk_trace_shutdown+0x54/0x70 [ 496.441479] __blk_release_queue+0x1f7/0x490 [ 496.441489] process_one_work+0x830/0x1670 [ 496.441502] ? pwq_dec_nr_in_flight+0x2c0/0x2c0 [ 496.441508] ? lock_acquire+0x173/0x3d0 [ 496.441516] ? kasan_check_write+0x14/0x20 [ 496.441522] ? do_raw_spin_lock+0xd0/0x240 [ 496.441530] worker_thread+0x85/0xb60 [ 496.441535] ? __kthread_parkme+0x47/0x190 [ 496.441546] kthread+0x324/0x3e0 [ 496.441550] ? process_one_work+0x1670/0x1670 [ 496.441554] ? kthread_cancel_delayed_work_sync+0x10/0x10 [ 496.441607] ret_from_fork+0x24/0x30 [ 496.441620] [ 496.441625] Allocated by task 17353: [ 496.441630] save_stack+0x43/0xd0 [ 496.441633] kasan_kmalloc+0xc7/0xe0 [ 496.441638] kasan_slab_alloc+0x12/0x20 [ 496.447806] kobject: 'holders' (000000009dcb38d6): kobject_add_internal: parent: 'loop0', set: '' [ 496.451411] kmem_cache_alloc+0x12e/0x730 [ 496.451490] __d_alloc+0x28/0x9d0 [ 496.451494] d_alloc+0x42/0x220 [ 496.451498] d_alloc_parallel+0xf3/0x1750 [ 496.451521] __lookup_slow+0x18d/0x400 [ 496.451528] lookup_one_len+0x132/0x160 [ 496.455992] kobject: 'slaves' (00000000db644afc): kobject_add_internal: parent: 'loop0', set: '' [ 496.460451] start_creating+0x91/0x190 [ 496.460456] __debugfs_create_file+0x37/0x390 [ 496.460460] debugfs_create_file+0x24/0x30 [ 496.460466] do_blk_trace_setup+0x31e/0xa70 [ 496.460470] __blk_trace_setup+0xb4/0x130 [ 496.460474] blk_trace_ioctl+0x155/0x2a0 [ 496.460550] blkdev_ioctl+0x6ca/0x16d0 [ 496.460591] block_ioctl+0xd7/0x130 [ 496.464884] kobject: 'loop0' (000000005eba4fed): kobject_uevent_env [ 496.468309] do_vfs_ioctl+0x196/0x10c0 [ 496.468313] ksys_ioctl+0x62/0x90 [ 496.468316] __x64_sys_ioctl+0x6e/0xb0 [ 496.468323] do_syscall_64+0xd0/0x4e0 [ 496.468329] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 496.468332] [ 496.468335] Freed by task 18: [ 496.468340] save_stack+0x43/0xd0 [ 496.468344] __kasan_slab_free+0x102/0x150 [ 496.468348] kasan_slab_free+0xe/0x10 [ 496.468352] kmem_cache_free+0x83/0x290 [ 496.468357] __d_free+0x17/0x20 [ 496.468364] rcu_process_callbacks+0xbcd/0x19a0 [ 496.468444] __do_softirq+0x260/0x92d [ 496.468448] [ 496.473211] kobject: 'loop0' (000000005eba4fed): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 496.476757] The buggy address belongs to the object at ffff88806afc5580 [ 496.476757] which belongs to the cache dentry(81:syz1) of size 288 [ 496.476762] The buggy address is located 64 bytes inside of [ 496.476762] 288-byte region [ffff88806afc5580, ffff88806afc56a0) [ 496.476764] The buggy address belongs to the page: [ 496.476769] page:ffffea0001abf140 count:1 mapcount:0 mapping:ffff888092409040 index:0x0 [ 496.476775] flags: 0x1fffc0000000100(slab) [ 496.476782] raw: 01fffc0000000100 ffffea0001abf008 ffffea00019dbbc8 ffff888092409040 [ 496.476787] raw: 0000000000000000 ffff88806afc5000 000000010000000b ffff88808fe74a80 [ 496.476789] page dumped because: kasan: bad access detected [ 496.476792] page->mem_cgroup:ffff88808fe74a80 [ 496.476794] [ 496.476797] Memory state around the buggy address: [ 496.476801] ffff88806afc5480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 496.476805] ffff88806afc5500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 496.476808] >ffff88806afc5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 496.476811] ^ [ 496.476814] ffff88806afc5600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 496.476817] ffff88806afc5680: fb fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb [ 496.476822] ================================================================== [ 496.484274] kobject: 'queue' (00000000d7b633fe): kobject_add_internal: parent: 'loop0', set: '' [ 496.485454] Disabling lock debugging due to kernel taint [ 496.485559] Kernel panic - not syncing: panic_on_warn set ... [ 496.485559] [ 496.492433] kobject: 'mq' (00000000b9a51932): kobject_add_internal: parent: 'loop0', set: '' [ 496.494669] CPU: 0 PID: 7206 Comm: kworker/0:0 Tainted: G B 4.19.95-syzkaller #0 [ 496.494673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 496.494684] Workqueue: events __blk_release_queue [ 496.494687] Call Trace: [ 496.494699] dump_stack+0x123/0x177 [ 496.494706] panic+0x1cd/0x375 [ 496.494713] ? __warn_printk+0xd6/0xd6 [ 496.499069] kobject: 'mq' (00000000b9a51932): kobject_uevent_env [ 496.503170] ? ___preempt_schedule+0x16/0x18 [ 496.503179] kasan_end_report+0x47/0x4f [ 496.503183] kasan_report.cold.9+0x76/0x309 [ 496.503189] ? debugfs_remove+0xd3/0xf0 [ 496.503193] __asan_report_load8_noabort+0x14/0x20 [ 496.503197] debugfs_remove+0xd3/0xf0 [ 496.503203] blk_trace_free+0x30/0x130 [ 496.503207] __blk_trace_remove+0x57/0x80 [ 496.503212] blk_trace_shutdown+0x54/0x70 [ 496.503218] __blk_release_queue+0x1f7/0x490 [ 496.503223] process_one_work+0x830/0x1670 [ 496.503230] ? pwq_dec_nr_in_flight+0x2c0/0x2c0 [ 496.508498] kobject: 'mq' (00000000b9a51932): kobject_uevent_env: filter function caused the event to drop! [ 496.511372] ? lock_acquire+0x173/0x3d0 [ 496.511379] ? kasan_check_write+0x14/0x20 [ 496.511384] ? do_raw_spin_lock+0xd0/0x240 [ 496.511392] worker_thread+0x85/0xb60 [ 496.511397] ? __kthread_parkme+0x47/0x190 [ 496.511404] kthread+0x324/0x3e0 [ 496.511408] ? process_one_work+0x1670/0x1670 [ 496.511411] ? kthread_cancel_delayed_work_sync+0x10/0x10 [ 496.511419] ret_from_fork+0x24/0x30 [ 496.515715] kobject: '0' (0000000055f9e25c): kobject_add_internal: parent: 'mq', set: '' [ 496.520723] Kernel Offset: disabled [ 497.001310] Rebooting in 86400 seconds..