Warning: Permanently added '10.128.0.108' (ECDSA) to the list of known hosts. 2020/06/16 21:07:06 fuzzer started 2020/06/16 21:07:06 connecting to host at 10.128.0.26:34819 2020/06/16 21:07:06 checking machine... 2020/06/16 21:07:06 checking revisions... 2020/06/16 21:07:06 testing simple program... login: [ 65.391478][ T6814] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6814 [ 65.401011][ T6814] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.407366][ T6814] CPU: 1 PID: 6814 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 65.416118][ T6814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.426177][ T6814] Call Trace: [ 65.429476][ T6814] dump_stack+0x18f/0x20d [ 65.433815][ T6814] check_preemption_disabled+0x20d/0x220 [ 65.439431][ T6814] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.444554][ T6814] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.450015][ T6814] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.456515][ T6814] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.461816][ T6814] ? ext4_ext_release+0x10/0x10 [ 65.466775][ T6814] ? down_write_killable+0x170/0x170 [ 65.472058][ T6814] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.477515][ T6814] ext4_map_blocks+0x4cb/0x1640 [ 65.482359][ T6814] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.487562][ T6814] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.493107][ T6814] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.499534][ T6814] ? prandom_u32_state+0xe/0x170 [ 65.504465][ T6814] ? __brelse+0x84/0xa0 [ 65.508606][ T6814] ? __ext4_new_inode+0x144/0x55e0 [ 65.513702][ T6814] ext4_getblk+0xad/0x520 [ 65.518035][ T6814] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.523759][ T6814] ? ext4_free_inode+0x1700/0x1700 [ 65.528859][ T6814] ext4_bread+0x7c/0x380 [ 65.533124][ T6814] ? ext4_getblk+0x520/0x520 [ 65.537706][ T6814] ? dquot_get_next_dqblk+0x180/0x180 [ 65.543370][ T6814] ext4_append+0x153/0x360 [ 65.548128][ T6814] ext4_mkdir+0x5e0/0xdf0 [ 65.552455][ T6814] ? ext4_rmdir+0xde0/0xde0 [ 65.556950][ T6814] ? security_inode_permission+0xc4/0xf0 [ 65.562572][ T6814] vfs_mkdir+0x419/0x690 [ 65.566813][ T6814] do_mkdirat+0x21e/0x280 [ 65.571130][ T6814] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.575972][ T6814] ? do_syscall_64+0x1c/0xe0 [ 65.580546][ T6814] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.586512][ T6814] do_syscall_64+0x60/0xe0 [ 65.590938][ T6814] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.596808][ T6814] RIP: 0033:0x4b02a0 [ 65.600689][ T6814] Code: Bad RIP value. [ 65.604734][ T6814] RSP: 002b:000000c0003cb4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.613144][ T6814] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 65.621116][ T6814] RDX: 00000000000001c0 RSI: 000000c000026ec0 RDI: ffffffffffffff9c [ 65.629562][ T6814] RBP: 000000c0003cb510 R08: 0000000000000000 R09: 0000000000000000 [ 65.637542][ T6814] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.645514][ T6814] R13: 0000000000000077 R14: 0000000000000076 R15: 0000000000000100 [ 65.663495][ T6817] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6817 [ 65.673004][ T6817] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.678907][ T6817] CPU: 1 PID: 6817 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.687839][ T6817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.698083][ T6817] Call Trace: [ 65.702267][ T6817] dump_stack+0x18f/0x20d [ 65.706730][ T6817] check_preemption_disabled+0x20d/0x220 [ 65.712445][ T6817] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.717551][ T6817] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.723003][ T6817] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.728806][ T6817] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.734082][ T6817] ? ext4_ext_release+0x10/0x10 [ 65.738938][ T6817] ? down_write_killable+0x170/0x170 [ 65.744203][ T6817] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.749659][ T6817] ext4_map_blocks+0x4cb/0x1640 [ 65.754585][ T6817] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.759766][ T6817] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.765307][ T6817] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.771303][ T6817] ? prandom_u32_state+0xe/0x170 [ 65.776231][ T6817] ? __brelse+0x84/0xa0 [ 65.780386][ T6817] ? __ext4_new_inode+0x144/0x55e0 [ 65.785493][ T6817] ext4_getblk+0xad/0x520 [ 65.789811][ T6817] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.795513][ T6817] ? ext4_free_inode+0x1700/0x1700 [ 65.800611][ T6817] ext4_bread+0x7c/0x380 [ 65.804849][ T6817] ? ext4_getblk+0x520/0x520 [ 65.810568][ T6817] ? dquot_get_next_dqblk+0x180/0x180 [ 65.815947][ T6817] ext4_append+0x153/0x360 [ 65.820345][ T6817] ext4_mkdir+0x5e0/0xdf0 [ 65.824679][ T6817] ? ext4_rmdir+0xde0/0xde0 [ 65.829165][ T6817] ? security_inode_permission+0xc4/0xf0 [ 65.834780][ T6817] vfs_mkdir+0x419/0x690 [ 65.839003][ T6817] do_mkdirat+0x21e/0x280 [ 65.843314][ T6817] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.848234][ T6817] ? do_syscall_64+0x1c/0xe0 [ 65.852815][ T6817] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.858874][ T6817] do_syscall_64+0x60/0xe0 [ 65.863294][ T6817] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.869179][ T6817] RIP: 0033:0x45bed7 [ 65.873136][ T6817] Code: Bad RIP value. [ 65.877181][ T6817] RSP: 002b:00007ffe664df3a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 65.885582][ T6817] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 65.893541][ T6817] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffe664df580 [ 65.901519][ T6817] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003bc0 [ 65.909478][ T6817] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 65.917447][ T6817] R13: 00007ffe664df580 R14: 8421084210842109 R15: 00007ffe664df58c [ 66.003958][ T6818] IPVS: ftp: loaded support on port[0] = 21 [ 66.041319][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 66.050781][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.056995][ T6818] CPU: 0 PID: 6818 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.065575][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.075620][ T6818] Call Trace: [ 66.078920][ T6818] dump_stack+0x18f/0x20d [ 66.083258][ T6818] check_preemption_disabled+0x20d/0x220 [ 66.089243][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.094410][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.099905][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.105654][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.111800][ T6818] ? ext4_ext_release+0x10/0x10 [ 66.116699][ T6818] ? down_write_killable+0x170/0x170 [ 66.121989][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.128001][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 66.132839][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.139090][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.145210][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.151171][ T6818] ? prandom_u32_state+0xe/0x170 [ 66.156089][ T6818] ? __brelse+0x84/0xa0 [ 66.161266][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 66.166383][ T6818] ext4_getblk+0xad/0x520 [ 66.170707][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.176503][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 66.181617][ T6818] ext4_bread+0x7c/0x380 [ 66.185881][ T6818] ? ext4_getblk+0x520/0x520 [ 66.190455][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 66.195813][ T6818] ext4_append+0x153/0x360 [ 66.200216][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 66.204596][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 66.209187][ T6818] ? security_inode_permission+0xc4/0xf0 [ 66.214803][ T6818] vfs_mkdir+0x419/0x690 [ 66.219055][ T6818] do_mkdirat+0x21e/0x280 [ 66.223366][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.228195][ T6818] ? do_syscall_64+0x1c/0xe0 [ 66.232784][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.238763][ T6818] do_syscall_64+0x60/0xe0 [ 66.243192][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.249086][ T6818] RIP: 0033:0x45bed7 [ 66.252958][ T6818] Code: Bad RIP value. [ 66.257003][ T6818] RSP: 002b:00007ffe664df298 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.265391][ T6818] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 66.273459][ T6818] RDX: 00007ffe664df2e3 RSI: 00000000000001ff RDI: 00007ffe664df2e0 [ 66.281785][ T6818] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 66.289743][ T6818] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185c0 [ 66.297695][ T6818] R13: 00007ffe664df2d0 R14: 0000000000000000 R15: 00007ffe664df2e0 [ 66.352541][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 66.361956][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.368416][ T6818] CPU: 1 PID: 6818 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.377014][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.387253][ T6818] Call Trace: [ 66.390559][ T6818] dump_stack+0x18f/0x20d [ 66.394920][ T6818] check_preemption_disabled+0x20d/0x220 [ 66.400601][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.405741][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.411213][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.419428][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.425006][ T6818] ? ext4_ext_release+0x10/0x10 [ 66.429978][ T6818] ? down_write_killable+0x170/0x170 [ 66.436126][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.441598][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 66.446641][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.451826][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.457575][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.463564][ T6818] ? prandom_u32_state+0xe/0x170 [ 66.468601][ T6818] ? __brelse+0x84/0xa0 [ 66.472769][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 66.477886][ T6818] ext4_getblk+0xad/0x520 [ 66.483094][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.488814][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 66.494277][ T6818] ext4_bread+0x7c/0x380 [ 66.498723][ T6818] ? ext4_getblk+0x520/0x520 [ 66.503468][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 66.508841][ T6818] ext4_append+0x153/0x360 [ 66.513251][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 66.517593][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 66.522085][ T6818] ? security_inode_permission+0xc4/0xf0 [ 66.527703][ T6818] vfs_mkdir+0x419/0x690 [ 66.531926][ T6818] do_mkdirat+0x21e/0x280 [ 66.536239][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.541066][ T6818] ? do_syscall_64+0x1c/0xe0 [ 66.545635][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.551609][ T6818] do_syscall_64+0x60/0xe0 [ 66.556102][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.561974][ T6818] RIP: 0033:0x45bed7 [ 66.565867][ T6818] Code: Bad RIP value. [ 66.569916][ T6818] RSP: 002b:00007ffe664df298 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 66.578310][ T6818] RAX: ffffffffffffffda RBX: 000000000001032b RCX: 000000000045bed7 [ 66.586262][ T6818] RDX: 00007ffe664df2e3 RSI: 00000000000001ff RDI: 00007ffe664df2e0 [ 66.594403][ T6818] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/16 21:07:07 building call list... [ 66.602711][ T6818] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 66.610659][ T6818] R13: 00007ffe664df2d0 R14: 0000000000010319 R15: 00007ffe664df2e0 [ 66.842403][ T136] tipc: TX() has been purged, node left! [ 67.354826][ T136] ================================================================== [ 67.363052][ T136] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 67.370934][ T136] Write of size 1 at addr ffff8880932541e4 by task kworker/u4:4/136 [ 67.378895][ T136] [ 67.381226][ T136] CPU: 0 PID: 136 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.389625][ T136] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.399678][ T136] Workqueue: netns cleanup_net [ 67.404430][ T136] Call Trace: [ 67.407718][ T136] dump_stack+0x18f/0x20d [ 67.412057][ T136] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.417596][ T136] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.423133][ T136] ? afs_put_call+0xa40/0xa40 [ 67.427811][ T136] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.434839][ T136] ? vprintk_func+0x97/0x1a6 [ 67.439446][ T136] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.445008][ T136] kasan_report.cold+0x1f/0x37 [ 67.449779][ T136] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.455410][ T136] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.460972][ T136] afs_wake_up_async_call+0x6aa/0x770 [ 67.466338][ T136] ? afs_close_socket+0x320/0x320 [ 67.471363][ T136] ? afs_put_call+0xa40/0xa40 [ 67.476037][ T136] rxrpc_notify_socket+0x1db/0x5d0 [ 67.481161][ T136] ? afs_put_call+0xa40/0xa40 [ 67.485849][ T136] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.492265][ T136] rxrpc_call_completed+0xca/0xf0 [ 67.497299][ T136] rxrpc_discard_prealloc+0x781/0xab0 [ 67.502674][ T136] ? lock_sock_nested+0x94/0x110 [ 67.507616][ T136] rxrpc_listen+0x147/0x360 [ 67.512134][ T136] afs_close_socket+0x95/0x320 [ 67.516904][ T136] ? afs_purge_servers+0x16d/0x300 [ 67.522022][ T136] ? afs_rx_discard_new_call+0x50/0x50 [ 67.527491][ T136] ? init_wait_var_entry+0x200/0x200 [ 67.532779][ T136] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.538413][ T136] ? check_preemption_disabled+0x38/0x220 [ 67.544136][ T136] afs_net_exit+0x1bc/0x310 [ 67.548637][ T136] ? afs_net_init+0xe30/0xe30 [ 67.553309][ T136] ops_exit_list.isra.0+0xa8/0x150 [ 67.558422][ T136] cleanup_net+0x511/0xa50 [ 67.562857][ T136] ? unregister_pernet_device+0x70/0x70 [ 67.568404][ T136] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.574390][ T136] process_one_work+0x965/0x1690 [ 67.579338][ T136] ? lock_release+0x800/0x800 [ 67.584031][ T136] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.589758][ T136] ? rwlock_bug.part.0+0x90/0x90 [ 67.594709][ T136] worker_thread+0x96/0xe10 [ 67.599231][ T136] ? process_one_work+0x1690/0x1690 [ 67.604432][ T136] kthread+0x3b5/0x4a0 [ 67.608496][ T136] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.614315][ T136] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.620209][ T136] ret_from_fork+0x1f/0x30 [ 67.624633][ T136] [ 67.626954][ T136] Allocated by task 6818: [ 67.631284][ T136] save_stack+0x1b/0x40 [ 67.635439][ T136] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.641069][ T136] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.646435][ T136] afs_alloc_call+0x55/0x630 [ 67.651017][ T136] afs_charge_preallocation+0xe9/0x2d0 [ 67.656468][ T136] afs_open_socket+0x292/0x360 [ 67.661222][ T136] afs_net_init+0xa6c/0xe30 [ 67.666067][ T136] ops_init+0xaf/0x420 [ 67.670140][ T136] setup_net+0x2de/0x860 [ 67.674377][ T136] copy_net_ns+0x293/0x590 [ 67.678903][ T136] create_new_namespaces+0x3fb/0xb30 [ 67.684195][ T136] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.689823][ T136] ksys_unshare+0x43d/0x8e0 [ 67.694346][ T136] __x64_sys_unshare+0x2d/0x40 [ 67.699108][ T136] do_syscall_64+0x60/0xe0 [ 67.703549][ T136] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.709603][ T136] [ 67.711925][ T136] Freed by task 136: [ 67.715915][ T136] save_stack+0x1b/0x40 [ 67.720107][ T136] __kasan_slab_free+0xf7/0x140 [ 67.724981][ T136] kfree+0x109/0x2b0 [ 67.728980][ T136] afs_put_call+0x585/0xa40 [ 67.733505][ T136] rxrpc_discard_prealloc+0x764/0xab0 [ 67.738880][ T136] rxrpc_listen+0x147/0x360 [ 67.743390][ T136] afs_close_socket+0x95/0x320 [ 67.748158][ T136] afs_net_exit+0x1bc/0x310 [ 67.752686][ T136] ops_exit_list.isra.0+0xa8/0x150 [ 67.757791][ T136] cleanup_net+0x511/0xa50 [ 67.762223][ T136] process_one_work+0x965/0x1690 [ 67.767160][ T136] worker_thread+0x96/0xe10 [ 67.771664][ T136] kthread+0x3b5/0x4a0 [ 67.775734][ T136] ret_from_fork+0x1f/0x30 [ 67.780139][ T136] [ 67.782466][ T136] The buggy address belongs to the object at ffff888093254000 [ 67.782466][ T136] which belongs to the cache kmalloc-1k of size 1024 [ 67.798689][ T136] The buggy address is located 484 bytes inside of [ 67.798689][ T136] 1024-byte region [ffff888093254000, ffff888093254400) [ 67.812037][ T136] The buggy address belongs to the page: [ 67.817678][ T136] page:ffffea00024c9500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 67.826778][ T136] flags: 0xfffe0000000200(slab) [ 67.831636][ T136] raw: 00fffe0000000200 ffffea0002517148 ffffea00024c0688 ffff8880aa000c40 [ 67.840307][ T136] raw: 0000000000000000 ffff888093254000 0000000100000002 0000000000000000 [ 67.849012][ T136] page dumped because: kasan: bad access detected [ 67.855443][ T136] [ 67.857766][ T136] Memory state around the buggy address: [ 67.863402][ T136] ffff888093254080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.871461][ T136] ffff888093254100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.879524][ T136] >ffff888093254180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.887870][ T136] ^ [ 67.895060][ T136] ffff888093254200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.903729][ T136] ffff888093254280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.911800][ T136] ================================================================== [ 67.919851][ T136] Disabling lock debugging due to kernel taint [ 67.926064][ T136] Kernel panic - not syncing: panic_on_warn set ... [ 67.932683][ T136] CPU: 0 PID: 136 Comm: kworker/u4:4 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 67.942405][ T136] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.952507][ T136] Workqueue: netns cleanup_net [ 67.957268][ T136] Call Trace: [ 67.960560][ T136] dump_stack+0x18f/0x20d [ 67.964923][ T136] ? afs_wake_up_async_call+0x670/0x770 [ 67.970831][ T136] ? afs_put_call+0xa40/0xa40 [ 67.975593][ T136] panic+0x2e3/0x75c [ 67.979499][ T136] ? __warn_printk+0xf3/0xf3 [ 67.984087][ T136] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 67.990290][ T136] ? trace_hardirqs_on+0x55/0x220 [ 67.995389][ T136] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.001077][ T136] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.006613][ T136] ? afs_put_call+0xa40/0xa40 [ 68.011286][ T136] end_report+0x4d/0x53 [ 68.015542][ T136] kasan_report.cold+0xd/0x37 [ 68.020219][ T136] ? rcu_read_lock_held_common+0x51/0xa0 [ 68.025855][ T136] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.031416][ T136] afs_wake_up_async_call+0x6aa/0x770 [ 68.036794][ T136] ? afs_close_socket+0x320/0x320 [ 68.041816][ T136] ? afs_put_call+0xa40/0xa40 [ 68.046485][ T136] rxrpc_notify_socket+0x1db/0x5d0 [ 68.051737][ T136] ? afs_put_call+0xa40/0xa40 [ 68.056412][ T136] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 68.062820][ T136] rxrpc_call_completed+0xca/0xf0 [ 68.067845][ T136] rxrpc_discard_prealloc+0x781/0xab0 [ 68.073210][ T136] ? lock_sock_nested+0x94/0x110 [ 68.078320][ T136] rxrpc_listen+0x147/0x360 [ 68.082834][ T136] afs_close_socket+0x95/0x320 [ 68.087600][ T136] ? afs_purge_servers+0x16d/0x300 [ 68.092701][ T136] ? afs_rx_discard_new_call+0x50/0x50 [ 68.098160][ T136] ? init_wait_var_entry+0x200/0x200 [ 68.103439][ T136] ? rcu_read_lock_held_common+0xa0/0xa0 [ 68.109069][ T136] ? check_preemption_disabled+0x38/0x220 [ 68.114776][ T136] afs_net_exit+0x1bc/0x310 [ 68.119270][ T136] ? afs_net_init+0xe30/0xe30 [ 68.128179][ T136] ops_exit_list.isra.0+0xa8/0x150 [ 68.133329][ T136] cleanup_net+0x511/0xa50 [ 68.137740][ T136] ? unregister_pernet_device+0x70/0x70 [ 68.143278][ T136] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.149406][ T136] process_one_work+0x965/0x1690 [ 68.154337][ T136] ? lock_release+0x800/0x800 [ 68.158999][ T136] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.164377][ T136] ? rwlock_bug.part.0+0x90/0x90 [ 68.169336][ T136] worker_thread+0x96/0xe10 [ 68.173837][ T136] ? process_one_work+0x1690/0x1690 [ 68.179026][ T136] kthread+0x3b5/0x4a0 [ 68.183081][ T136] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.188793][ T136] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.194532][ T136] ret_from_fork+0x1f/0x30 [ 68.200675][ T136] Kernel Offset: disabled [ 68.205002][ T136] Rebooting in 86400 seconds..