Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. 2020/06/16 20:28:03 fuzzer started 2020/06/16 20:28:03 connecting to host at 10.128.0.26:37689 2020/06/16 20:28:03 checking machine... 2020/06/16 20:28:03 checking revisions... 2020/06/16 20:28:03 testing simple program... [ 64.119931][ T6807] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6807 [ 64.129310][ T6807] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.135289][ T6807] CPU: 1 PID: 6807 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 64.143533][ T6807] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.153591][ T6807] Call Trace: [ 64.156886][ T6807] dump_stack+0x18f/0x20d [ 64.161219][ T6807] check_preemption_disabled+0x20d/0x220 [ 64.166839][ T6807] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.171940][ T6807] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.177421][ T6807] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.183127][ T6807] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.188516][ T6807] ? ext4_ext_release+0x10/0x10 [ 64.193360][ T6807] ? down_write_killable+0x170/0x170 [ 64.198670][ T6807] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.204136][ T6807] ext4_map_blocks+0x4cb/0x1640 [ 64.208994][ T6807] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.214175][ T6807] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.219703][ T6807] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.225666][ T6807] ? prandom_u32_state+0xe/0x170 [ 64.230583][ T6807] ? __brelse+0x84/0xa0 [ 64.234738][ T6807] ? __ext4_new_inode+0x144/0x55e0 [ 64.239832][ T6807] ext4_getblk+0xad/0x520 [ 64.244175][ T6807] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.249950][ T6807] ? ext4_free_inode+0x1700/0x1700 [ 64.255107][ T6807] ext4_bread+0x7c/0x380 [ 64.259338][ T6807] ? ext4_getblk+0x520/0x520 [ 64.263946][ T6807] ? dquot_get_next_dqblk+0x180/0x180 [ 64.269303][ T6807] ext4_append+0x153/0x360 [ 64.273706][ T6807] ext4_mkdir+0x5e0/0xdf0 [ 64.278193][ T6807] ? ext4_rmdir+0xde0/0xde0 [ 64.282693][ T6807] ? security_inode_permission+0xc4/0xf0 [ 64.288355][ T6807] vfs_mkdir+0x419/0x690 [ 64.292590][ T6807] do_mkdirat+0x21e/0x280 [ 64.296921][ T6807] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.301755][ T6807] ? do_syscall_64+0x1c/0xe0 [ 64.306344][ T6807] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.312316][ T6807] do_syscall_64+0x60/0xe0 [ 64.316724][ T6807] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.322595][ T6807] RIP: 0033:0x4b02a0 [ 64.326463][ T6807] Code: Bad RIP value. [ 64.330511][ T6807] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 64.338903][ T6807] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 64.346856][ T6807] RDX: 00000000000001c0 RSI: 000000c000026f40 RDI: ffffffffffffff9c [ 64.354808][ T6807] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 [ 64.362759][ T6807] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 64.370728][ T6807] R13: 000000000000007b R14: 000000000000007a R15: 0000000000000100 [ 64.392605][ T6821] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6821 [ 64.402023][ T6821] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.408039][ T6821] CPU: 1 PID: 6821 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.416643][ T6821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.426698][ T6821] Call Trace: [ 64.429995][ T6821] dump_stack+0x18f/0x20d [ 64.434332][ T6821] check_preemption_disabled+0x20d/0x220 [ 64.440013][ T6821] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.445155][ T6821] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.450673][ T6821] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.456410][ T6821] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.461791][ T6821] ? ext4_ext_release+0x10/0x10 [ 64.466657][ T6821] ? down_write_killable+0x170/0x170 [ 64.471954][ T6821] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.477507][ T6821] ext4_map_blocks+0x4cb/0x1640 [ 64.482383][ T6821] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.487588][ T6821] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.493135][ T6821] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.499142][ T6821] ? prandom_u32_state+0xe/0x170 [ 64.504086][ T6821] ? __brelse+0x84/0xa0 [ 64.508239][ T6821] ? __ext4_new_inode+0x144/0x55e0 [ 64.513382][ T6821] ext4_getblk+0xad/0x520 [ 64.517711][ T6821] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.523445][ T6821] ? ext4_free_inode+0x1700/0x1700 [ 64.528695][ T6821] ext4_bread+0x7c/0x380 [ 64.532946][ T6821] ? ext4_getblk+0x520/0x520 [ 64.537561][ T6821] ? dquot_get_next_dqblk+0x180/0x180 [ 64.542954][ T6821] ext4_append+0x153/0x360 [ 64.547382][ T6821] ext4_mkdir+0x5e0/0xdf0 [ 64.551727][ T6821] ? ext4_rmdir+0xde0/0xde0 [ 64.556229][ T6821] ? security_inode_permission+0xc4/0xf0 [ 64.561894][ T6821] vfs_mkdir+0x419/0x690 [ 64.566153][ T6821] do_mkdirat+0x21e/0x280 [ 64.570672][ T6821] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.575602][ T6821] ? do_syscall_64+0x1c/0xe0 [ 64.580196][ T6821] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.586189][ T6821] do_syscall_64+0x60/0xe0 [ 64.590613][ T6821] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.596512][ T6821] RIP: 0033:0x45bed7 [ 64.600403][ T6821] Code: Bad RIP value. [ 64.604465][ T6821] RSP: 002b:00007ffc0549f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 64.612879][ T6821] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 64.620849][ T6821] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffc0549f200 [ 64.628932][ T6821] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002e80 [ 64.636908][ T6821] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 64.644943][ T6821] R13: 00007ffc0549f200 R14: 8421084210842109 R15: 00007ffc0549f20c [ 64.738968][ T6822] IPVS: ftp: loaded support on port[0] = 21 [ 64.775851][ T6822] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6822 [ 64.785544][ T6822] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.791626][ T6822] CPU: 1 PID: 6822 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.800204][ T6822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.810285][ T6822] Call Trace: [ 64.813566][ T6822] dump_stack+0x18f/0x20d [ 64.817881][ T6822] check_preemption_disabled+0x20d/0x220 [ 64.823498][ T6822] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.828596][ T6822] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.834036][ T6822] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.839739][ T6822] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.845010][ T6822] ? ext4_ext_release+0x10/0x10 [ 64.849856][ T6822] ? down_write_killable+0x170/0x170 [ 64.855121][ T6822] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.860562][ T6822] ext4_map_blocks+0x4cb/0x1640 [ 64.865431][ T6822] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.870617][ T6822] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.876163][ T6822] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.882122][ T6822] ? prandom_u32_state+0xe/0x170 [ 64.887053][ T6822] ? __brelse+0x84/0xa0 [ 64.891218][ T6822] ? __ext4_new_inode+0x144/0x55e0 [ 64.896314][ T6822] ext4_getblk+0xad/0x520 [ 64.900629][ T6822] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.906331][ T6822] ? ext4_free_inode+0x1700/0x1700 [ 64.911463][ T6822] ext4_bread+0x7c/0x380 [ 64.915704][ T6822] ? ext4_getblk+0x520/0x520 [ 64.920292][ T6822] ? dquot_get_next_dqblk+0x180/0x180 [ 64.925646][ T6822] ext4_append+0x153/0x360 [ 64.930047][ T6822] ext4_mkdir+0x5e0/0xdf0 [ 64.934362][ T6822] ? ext4_rmdir+0xde0/0xde0 [ 64.938853][ T6822] ? security_inode_permission+0xc4/0xf0 [ 64.944572][ T6822] vfs_mkdir+0x419/0x690 [ 64.948816][ T6822] do_mkdirat+0x21e/0x280 [ 64.953148][ T6822] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.957978][ T6822] ? do_syscall_64+0x1c/0xe0 [ 64.962563][ T6822] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.968539][ T6822] do_syscall_64+0x60/0xe0 [ 64.972952][ T6822] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.978838][ T6822] RIP: 0033:0x45bed7 [ 64.982727][ T6822] Code: Bad RIP value. [ 64.986768][ T6822] RSP: 002b:00007ffc0549ef18 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 64.995163][ T6822] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 65.003133][ T6822] RDX: 00007ffc0549ef63 RSI: 00000000000001ff RDI: 00007ffc0549ef60 [ 65.011098][ T6822] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 65.019051][ T6822] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 65.027007][ T6822] R13: 00007ffc0549ef50 R14: 0000000000000000 R15: 00007ffc0549ef60 [ 65.082987][ T6822] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6822 [ 65.092453][ T6822] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.098361][ T6822] CPU: 0 PID: 6822 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.106951][ T6822] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.117015][ T6822] Call Trace: [ 65.120323][ T6822] dump_stack+0x18f/0x20d [ 65.124676][ T6822] check_preemption_disabled+0x20d/0x220 [ 65.130327][ T6822] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.135468][ T6822] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.140940][ T6822] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.146675][ T6822] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.151972][ T6822] ? ext4_ext_release+0x10/0x10 [ 65.156909][ T6822] ? down_write_killable+0x170/0x170 [ 65.162195][ T6822] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.167649][ T6822] ext4_map_blocks+0x4cb/0x1640 [ 65.172490][ T6822] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.177712][ T6822] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.183241][ T6822] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.189201][ T6822] ? prandom_u32_state+0xe/0x170 [ 65.194134][ T6822] ? __brelse+0x84/0xa0 [ 65.198293][ T6822] ? __ext4_new_inode+0x144/0x55e0 [ 65.203416][ T6822] ext4_getblk+0xad/0x520 [ 65.207759][ T6822] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.213479][ T6822] ? ext4_free_inode+0x1700/0x1700 [ 65.218839][ T6822] ext4_bread+0x7c/0x380 [ 65.223067][ T6822] ? ext4_getblk+0x520/0x520 [ 65.227639][ T6822] ? dquot_get_next_dqblk+0x180/0x180 [ 65.232994][ T6822] ext4_append+0x153/0x360 [ 65.237392][ T6822] ext4_mkdir+0x5e0/0xdf0 [ 65.241704][ T6822] ? ext4_rmdir+0xde0/0xde0 [ 65.246190][ T6822] ? security_inode_permission+0xc4/0xf0 [ 65.251805][ T6822] vfs_mkdir+0x419/0x690 [ 65.256038][ T6822] do_mkdirat+0x21e/0x280 [ 65.260347][ T6822] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.265181][ T6822] ? do_syscall_64+0x1c/0xe0 [ 65.269779][ T6822] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.275754][ T6822] do_syscall_64+0x60/0xe0 [ 65.280166][ T6822] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.286041][ T6822] RIP: 0033:0x45bed7 [ 65.289910][ T6822] Code: Bad RIP value. [ 65.293955][ T6822] RSP: 002b:00007ffc0549ef18 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 65.302345][ T6822] RAX: ffffffffffffffda RBX: 000000000000fe31 RCX: 000000000045bed7 [ 65.310415][ T6822] RDX: 00007ffc0549ef63 RSI: 00000000000001ff RDI: 00007ffc0549ef60 [ 65.318368][ T6822] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 65.326318][ T6822] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 65.336702][ T6822] R13: 00007ffc0549ef50 R14: 000000000000fe2d R15: 00007ffc0549ef60 2020/06/16 20:28:05 building call list... [ 65.611931][ T270] tipc: TX() has been purged, node left! [ 66.104198][ T270] ================================================================== [ 66.112443][ T270] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 66.120335][ T270] Write of size 1 at addr ffff88809e75c1e4 by task kworker/u4:6/270 [ 66.128296][ T270] [ 66.130633][ T270] CPU: 1 PID: 270 Comm: kworker/u4:6 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.138947][ T270] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.149012][ T270] Workqueue: netns cleanup_net [ 66.153776][ T270] Call Trace: [ 66.157072][ T270] dump_stack+0x18f/0x20d [ 66.161409][ T270] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.166951][ T270] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.172493][ T270] ? afs_put_call+0xa40/0xa40 [ 66.177176][ T270] print_address_description.constprop.0.cold+0xd3/0x413 [ 66.184203][ T270] ? vprintk_func+0x97/0x1a6 [ 66.188798][ T270] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.194363][ T270] kasan_report.cold+0x1f/0x37 [ 66.199157][ T270] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.204786][ T270] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.210337][ T270] afs_wake_up_async_call+0x6aa/0x770 [ 66.215704][ T270] ? afs_close_socket+0x320/0x320 [ 66.220730][ T270] ? afs_put_call+0xa40/0xa40 [ 66.225405][ T270] rxrpc_notify_socket+0x1db/0x5d0 [ 66.230519][ T270] ? afs_put_call+0xa40/0xa40 [ 66.235197][ T270] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.241612][ T270] rxrpc_call_completed+0xca/0xf0 [ 66.246642][ T270] rxrpc_discard_prealloc+0x781/0xab0 [ 66.252021][ T270] ? lock_sock_nested+0x94/0x110 [ 66.256982][ T270] rxrpc_listen+0x147/0x360 [ 66.261491][ T270] afs_close_socket+0x95/0x320 [ 66.266253][ T270] ? afs_purge_servers+0x16d/0x300 [ 66.271373][ T270] ? afs_rx_discard_new_call+0x50/0x50 [ 66.276836][ T270] ? init_wait_var_entry+0x200/0x200 [ 66.282149][ T270] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.287969][ T270] ? check_preemption_disabled+0x38/0x220 [ 66.293709][ T270] afs_net_exit+0x1bc/0x310 [ 66.298235][ T270] ? afs_net_init+0xe30/0xe30 [ 66.302912][ T270] ops_exit_list.isra.0+0xa8/0x150 [ 66.308027][ T270] cleanup_net+0x511/0xa50 [ 66.312453][ T270] ? unregister_pernet_device+0x70/0x70 [ 66.318004][ T270] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.323995][ T270] process_one_work+0x965/0x1690 [ 66.328945][ T270] ? lock_release+0x800/0x800 [ 66.333624][ T270] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.339001][ T270] ? rwlock_bug.part.0+0x90/0x90 [ 66.343951][ T270] worker_thread+0x96/0xe10 [ 66.348470][ T270] ? process_one_work+0x1690/0x1690 [ 66.353673][ T270] kthread+0x3b5/0x4a0 [ 66.357758][ T270] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.363514][ T270] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.369675][ T270] ret_from_fork+0x1f/0x30 [ 66.374107][ T270] [ 66.376435][ T270] Allocated by task 6822: [ 66.380761][ T270] save_stack+0x1b/0x40 [ 66.384918][ T270] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 66.390548][ T270] kmem_cache_alloc_trace+0x153/0x7d0 [ 66.395917][ T270] afs_alloc_call+0x55/0x630 [ 66.400503][ T270] afs_charge_preallocation+0xe9/0x2d0 [ 66.405957][ T270] afs_open_socket+0x292/0x360 [ 66.410715][ T270] afs_net_init+0xa6c/0xe30 [ 66.415213][ T270] ops_init+0xaf/0x420 [ 66.419287][ T270] setup_net+0x2de/0x860 [ 66.423579][ T270] copy_net_ns+0x293/0x590 [ 66.428012][ T270] create_new_namespaces+0x3fb/0xb30 [ 66.433328][ T270] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 66.438996][ T270] ksys_unshare+0x43d/0x8e0 [ 66.443518][ T270] __x64_sys_unshare+0x2d/0x40 [ 66.448310][ T270] do_syscall_64+0x60/0xe0 [ 66.452739][ T270] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.458954][ T270] [ 66.461282][ T270] Freed by task 270: [ 66.465179][ T270] save_stack+0x1b/0x40 [ 66.469333][ T270] __kasan_slab_free+0xf7/0x140 [ 66.474181][ T270] kfree+0x109/0x2b0 [ 66.478074][ T270] afs_put_call+0x585/0xa40 [ 66.482577][ T270] rxrpc_discard_prealloc+0x764/0xab0 [ 66.487949][ T270] rxrpc_listen+0x147/0x360 [ 66.492449][ T270] afs_close_socket+0x95/0x320 [ 66.497209][ T270] afs_net_exit+0x1bc/0x310 [ 66.501796][ T270] ops_exit_list.isra.0+0xa8/0x150 [ 66.506905][ T270] cleanup_net+0x511/0xa50 [ 66.511320][ T270] process_one_work+0x965/0x1690 [ 66.516283][ T270] worker_thread+0x96/0xe10 [ 66.520783][ T270] kthread+0x3b5/0x4a0 [ 66.524852][ T270] ret_from_fork+0x1f/0x30 [ 66.529266][ T270] [ 66.531612][ T270] The buggy address belongs to the object at ffff88809e75c000 [ 66.531612][ T270] which belongs to the cache kmalloc-1k of size 1024 [ 66.545666][ T270] The buggy address is located 484 bytes inside of [ 66.545666][ T270] 1024-byte region [ffff88809e75c000, ffff88809e75c400) [ 66.559119][ T270] The buggy address belongs to the page: [ 66.564753][ T270] page:ffffea000279d700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 66.573874][ T270] flags: 0xfffe0000000200(slab) [ 66.578727][ T270] raw: 00fffe0000000200 ffffea00027ad6c8 ffffea000279ff08 ffff8880aa000c40 [ 66.587313][ T270] raw: 0000000000000000 ffff88809e75c000 0000000100000002 0000000000000000 [ 66.595887][ T270] page dumped because: kasan: bad access detected [ 66.602288][ T270] [ 66.604609][ T270] Memory state around the buggy address: [ 66.610245][ T270] ffff88809e75c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.618306][ T270] ffff88809e75c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.626364][ T270] >ffff88809e75c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.634416][ T270] ^ [ 66.641607][ T270] ffff88809e75c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.649841][ T270] ffff88809e75c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.657894][ T270] ================================================================== [ 66.665946][ T270] Disabling lock debugging due to kernel taint [ 66.672152][ T270] Kernel panic - not syncing: panic_on_warn set ... [ 66.678743][ T270] CPU: 1 PID: 270 Comm: kworker/u4:6 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 66.688460][ T270] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.698529][ T270] Workqueue: netns cleanup_net [ 66.703289][ T270] Call Trace: [ 66.706583][ T270] dump_stack+0x18f/0x20d [ 66.710919][ T270] ? afs_wake_up_async_call+0x670/0x770 [ 66.716467][ T270] ? afs_put_call+0xa40/0xa40 [ 66.721145][ T270] panic+0x2e3/0x75c [ 66.725055][ T270] ? __warn_printk+0xf3/0xf3 [ 66.729649][ T270] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 66.735799][ T270] ? trace_hardirqs_on+0x55/0x220 [ 66.740940][ T270] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.746467][ T270] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.752059][ T270] ? afs_put_call+0xa40/0xa40 [ 66.756783][ T270] end_report+0x4d/0x53 [ 66.760935][ T270] kasan_report.cold+0xd/0x37 [ 66.765596][ T270] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.771269][ T270] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.776820][ T270] afs_wake_up_async_call+0x6aa/0x770 [ 66.782181][ T270] ? afs_close_socket+0x320/0x320 [ 66.787190][ T270] ? afs_put_call+0xa40/0xa40 [ 66.791853][ T270] rxrpc_notify_socket+0x1db/0x5d0 [ 66.796958][ T270] ? afs_put_call+0xa40/0xa40 [ 66.801654][ T270] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.808063][ T270] rxrpc_call_completed+0xca/0xf0 [ 66.813081][ T270] rxrpc_discard_prealloc+0x781/0xab0 [ 66.818449][ T270] ? lock_sock_nested+0x94/0x110 [ 66.823370][ T270] rxrpc_listen+0x147/0x360 [ 66.827860][ T270] afs_close_socket+0x95/0x320 [ 66.832618][ T270] ? afs_purge_servers+0x16d/0x300 [ 66.837711][ T270] ? afs_rx_discard_new_call+0x50/0x50 [ 66.843157][ T270] ? init_wait_var_entry+0x200/0x200 [ 66.848434][ T270] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.854058][ T270] ? check_preemption_disabled+0x38/0x220 [ 66.859827][ T270] afs_net_exit+0x1bc/0x310 [ 66.864316][ T270] ? afs_net_init+0xe30/0xe30 [ 66.868983][ T270] ops_exit_list.isra.0+0xa8/0x150 [ 66.874082][ T270] cleanup_net+0x511/0xa50 [ 66.878497][ T270] ? unregister_pernet_device+0x70/0x70 [ 66.884481][ T270] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.890591][ T270] process_one_work+0x965/0x1690 [ 66.895527][ T270] ? lock_release+0x800/0x800 [ 66.900231][ T270] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.905587][ T270] ? rwlock_bug.part.0+0x90/0x90 [ 66.910623][ T270] worker_thread+0x96/0xe10 [ 66.915120][ T270] ? process_one_work+0x1690/0x1690 [ 66.920302][ T270] kthread+0x3b5/0x4a0 [ 66.925308][ T270] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.931012][ T270] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.936720][ T270] ret_from_fork+0x1f/0x30 [ 66.942374][ T270] Kernel Offset: disabled [ 66.946711][ T270] Rebooting in 86400 seconds..