[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ 60.106702][ T6728] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6728 [ 60.106752][ T6728] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.106783][ T6728] CPU: 1 PID: 6728 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 60.106793][ T6728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.106799][ T6728] Call Trace: [ 60.106817][ T6728] dump_stack+0x18f/0x20d [ 60.106841][ T6728] check_preemption_disabled+0x20d/0x220 [ 60.106858][ T6728] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.106893][ T6728] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.106910][ T6728] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.106935][ T6728] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.106962][ T6728] ? ext4_ext_release+0x10/0x10 [ 60.106995][ T6728] ? down_write_killable+0x170/0x170 [ 60.107009][ T6728] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.107033][ T6728] ext4_map_blocks+0x4cb/0x1640 [ 60.107055][ T6728] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.107071][ T6728] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.107089][ T6728] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.107103][ T6728] ? prandom_u32_state+0xe/0x170 [ 60.107120][ T6728] ? __brelse+0x84/0xa0 [ 60.107135][ T6728] ? __ext4_new_inode+0x144/0x55e0 [ 60.107154][ T6728] ext4_getblk+0xad/0x520 [ 60.107172][ T6728] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.107194][ T6728] ? ext4_free_inode+0x1700/0x1700 [ 60.107213][ T6728] ext4_bread+0x7c/0x380 [ 60.107229][ T6728] ? ext4_getblk+0x520/0x520 [ 60.107246][ T6728] ? dquot_get_next_dqblk+0x180/0x180 [ 60.107270][ T6728] ext4_append+0x153/0x360 [ 60.107290][ T6728] ext4_mkdir+0x5e0/0xdf0 [ 60.107314][ T6728] ? ext4_rmdir+0xde0/0xde0 [ 60.107334][ T6728] ? security_inode_permission+0xc4/0xf0 [ 60.107358][ T6728] vfs_mkdir+0x419/0x690 [ 60.107378][ T6728] do_mkdirat+0x21e/0x280 [ 60.107395][ T6728] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.107413][ T6728] ? do_syscall_64+0x1c/0xe0 [ 60.107430][ T6728] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.107451][ T6728] do_syscall_64+0x60/0xe0 [ 60.107470][ T6728] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.107483][ T6728] RIP: 0033:0x7f32621df687 [ 60.107489][ T6728] Code: Bad RIP value. [ 60.107497][ T6728] RSP: 002b:00007ffdc94e24b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.107512][ T6728] RAX: ffffffffffffffda RBX: 000055b9a0473985 RCX: 00007f32621df687 [ 60.107522][ T6728] RDX: 00007ffdc94e2380 RSI: 00000000000001ed RDI: 000055b9a0473985 [ 60.107532][ T6728] RBP: 00007f32621df680 R08: 0000000000000100 R09: 0000000000000000 [ 60.107541][ T6728] R10: 000055b9a0473980 R11: 0000000000000246 R12: 00000000000001ed [ 60.107551][ T6728] R13: 00007ffdc94e2640 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.189' (ECDSA) to the list of known hosts. 2020/06/15 08:14:39 fuzzer started 2020/06/15 08:14:39 connecting to host at 10.128.0.26:39235 2020/06/15 08:14:39 checking machine... 2020/06/15 08:14:39 checking revisions... 2020/06/15 08:14:40 testing simple program... syzkaller login: [ 65.423170][ T6805] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6805 [ 65.432946][ T6805] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.439270][ T6805] CPU: 1 PID: 6805 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 65.447782][ T6805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.458088][ T6805] Call Trace: [ 65.461362][ T6805] dump_stack+0x18f/0x20d [ 65.465720][ T6805] check_preemption_disabled+0x20d/0x220 [ 65.471423][ T6805] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.476537][ T6805] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.481973][ T6805] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.487698][ T6805] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.493226][ T6805] ? ext4_ext_release+0x10/0x10 [ 65.498064][ T6805] ? down_write_killable+0x170/0x170 [ 65.503327][ T6805] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.508789][ T6805] ext4_map_blocks+0x4cb/0x1640 [ 65.513622][ T6805] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.518815][ T6805] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.524335][ T6805] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.530290][ T6805] ? prandom_u32_state+0xe/0x170 [ 65.535386][ T6805] ? __brelse+0x84/0xa0 [ 65.539517][ T6805] ? __ext4_new_inode+0x144/0x55e0 [ 65.544606][ T6805] ext4_getblk+0xad/0x520 [ 65.548916][ T6805] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.554612][ T6805] ? ext4_free_inode+0x1700/0x1700 [ 65.559781][ T6805] ext4_bread+0x7c/0x380 [ 65.564003][ T6805] ? ext4_getblk+0x520/0x520 [ 65.568577][ T6805] ? dquot_get_next_dqblk+0x180/0x180 [ 65.573939][ T6805] ext4_append+0x153/0x360 [ 65.578357][ T6805] ext4_mkdir+0x5e0/0xdf0 [ 65.582670][ T6805] ? ext4_rmdir+0xde0/0xde0 [ 65.587959][ T6805] ? security_inode_permission+0xc4/0xf0 [ 65.593587][ T6805] vfs_mkdir+0x419/0x690 [ 65.597825][ T6805] do_mkdirat+0x21e/0x280 [ 65.602133][ T6805] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.606963][ T6805] ? do_syscall_64+0x1c/0xe0 [ 65.611613][ T6805] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.617642][ T6805] do_syscall_64+0x60/0xe0 [ 65.622046][ T6805] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.627973][ T6805] RIP: 0033:0x4b02a0 [ 65.631894][ T6805] Code: Bad RIP value. [ 65.635936][ T6805] RSP: 002b:000000c0002194b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.644326][ T6805] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 65.652292][ T6805] RDX: 00000000000001c0 RSI: 000000c0002c06e0 RDI: ffffffffffffff9c [ 65.661397][ T6805] RBP: 000000c000219510 R08: 0000000000000000 R09: 0000000000000000 [ 65.669355][ T6805] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.677316][ T6805] R13: 0000000000000038 R14: 0000000000000037 R15: 0000000000000100 [ 65.693131][ T6819] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6819 [ 65.703700][ T6819] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.709732][ T6819] CPU: 1 PID: 6819 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.718332][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.728453][ T6819] Call Trace: [ 65.731733][ T6819] dump_stack+0x18f/0x20d [ 65.736063][ T6819] check_preemption_disabled+0x20d/0x220 [ 65.741685][ T6819] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.746799][ T6819] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.752254][ T6819] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.757971][ T6819] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.763269][ T6819] ? ext4_ext_release+0x10/0x10 [ 65.768163][ T6819] ? down_write_killable+0x170/0x170 [ 65.773431][ T6819] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.778878][ T6819] ext4_map_blocks+0x4cb/0x1640 [ 65.783756][ T6819] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.788985][ T6819] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.794533][ T6819] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.800515][ T6819] ? prandom_u32_state+0xe/0x170 [ 65.805452][ T6819] ? __brelse+0x84/0xa0 [ 65.809627][ T6819] ? __ext4_new_inode+0x144/0x55e0 [ 65.815141][ T6819] ext4_getblk+0xad/0x520 [ 65.819462][ T6819] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.825171][ T6819] ? ext4_free_inode+0x1700/0x1700 [ 65.830272][ T6819] ext4_bread+0x7c/0x380 [ 65.834534][ T6819] ? ext4_getblk+0x520/0x520 [ 65.839142][ T6819] ? dquot_get_next_dqblk+0x180/0x180 [ 65.844592][ T6819] ext4_append+0x153/0x360 [ 65.850043][ T6819] ext4_mkdir+0x5e0/0xdf0 [ 65.854358][ T6819] ? ext4_rmdir+0xde0/0xde0 [ 65.858843][ T6819] ? security_inode_permission+0xc4/0xf0 [ 65.864562][ T6819] vfs_mkdir+0x419/0x690 [ 65.868795][ T6819] do_mkdirat+0x21e/0x280 [ 65.873177][ T6819] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.878040][ T6819] ? do_fast_syscall_32+0x40/0x120 [ 65.883139][ T6819] do_syscall_32_irqs_on+0x3f/0x60 [ 65.888246][ T6819] do_fast_syscall_32+0x7f/0x120 [ 65.893287][ T6819] entry_SYSENTER_compat+0x6d/0x7c [ 65.898648][ T6819] RIP: 0023:0xf7f89569 [ 65.902806][ T6819] Code: Bad RIP value. [ 65.906951][ T6819] RSP: 002b:00000000ffdf03dc EFLAGS: 00000292 ORIG_RAX: 0000000000000027 [ 65.915449][ T6819] RAX: ffffffffffffffda RBX: 00000000ffdf0599 RCX: 00000000000001c0 [ 65.923405][ T6819] RDX: 0000000000000001 RSI: 0000000037a9d4d5 RDI: 000000000000002d [ 65.931549][ T6819] RBP: 00000000ffdf05a5 R08: 0000000000000000 R09: 0000000000000000 [ 65.939497][ T6819] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 65.947499][ T6819] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 66.034194][ T6820] IPVS: ftp: loaded support on port[0] = 21 [ 66.073124][ T6820] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6820 [ 66.082684][ T6820] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.088770][ T6820] CPU: 0 PID: 6820 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.097348][ T6820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.107687][ T6820] Call Trace: [ 66.111103][ T6820] dump_stack+0x18f/0x20d [ 66.115432][ T6820] check_preemption_disabled+0x20d/0x220 [ 66.121162][ T6820] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.126286][ T6820] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.131749][ T6820] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.137455][ T6820] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.142758][ T6820] ? ext4_ext_release+0x10/0x10 [ 66.147631][ T6820] ? down_write_killable+0x170/0x170 [ 66.152913][ T6820] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.158377][ T6820] ext4_map_blocks+0x4cb/0x1640 [ 66.163230][ T6820] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.168439][ T6820] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.173995][ T6820] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.180132][ T6820] ? prandom_u32_state+0xe/0x170 [ 66.185081][ T6820] ? __brelse+0x84/0xa0 [ 66.189233][ T6820] ? __ext4_new_inode+0x144/0x55e0 [ 66.194328][ T6820] ext4_getblk+0xad/0x520 [ 66.198945][ T6820] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.204652][ T6820] ? ext4_free_inode+0x1700/0x1700 [ 66.209748][ T6820] ext4_bread+0x7c/0x380 [ 66.213969][ T6820] ? ext4_getblk+0x520/0x520 [ 66.218558][ T6820] ? dquot_get_next_dqblk+0x180/0x180 [ 66.224046][ T6820] ext4_append+0x153/0x360 [ 66.228464][ T6820] ext4_mkdir+0x5e0/0xdf0 [ 66.232783][ T6820] ? ext4_rmdir+0xde0/0xde0 [ 66.237290][ T6820] ? security_inode_permission+0xc4/0xf0 [ 66.242922][ T6820] vfs_mkdir+0x419/0x690 [ 66.247158][ T6820] do_mkdirat+0x21e/0x280 [ 66.251476][ T6820] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.256338][ T6820] ? do_fast_syscall_32+0x40/0x120 [ 66.261438][ T6820] do_syscall_32_irqs_on+0x3f/0x60 [ 66.266619][ T6820] do_fast_syscall_32+0x7f/0x120 [ 66.271557][ T6820] entry_SYSENTER_compat+0x6d/0x7c [ 66.276673][ T6820] RIP: 0023:0xf7f89569 [ 66.280727][ T6820] Code: Bad RIP value. [ 66.284792][ T6820] RSP: 002b:00000000086aff7c EFLAGS: 00000246 ORIG_RAX: 0000000000000027 [ 66.293198][ T6820] RAX: ffffffffffffffda RBX: 00000000080d83c9 RCX: 00000000000001ff [ 66.301167][ T6820] RDX: 0000000008055970 RSI: 0000000000000000 RDI: 0000000030000000 [ 66.309389][ T6820] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 66.317360][ T6820] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 66.325433][ T6820] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 2020/06/15 08:14:41 building call list... [ 66.656547][ T26] tipc: TX() has been purged, node left! [ 67.188815][ T26] ================================================================== [ 67.197068][ T26] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 67.204955][ T26] Write of size 1 at addr ffff8880956c39e4 by task kworker/u4:2/26 [ 67.212853][ T26] [ 67.215186][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.223412][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.233467][ T26] Workqueue: netns cleanup_net [ 67.238220][ T26] Call Trace: [ 67.241512][ T26] dump_stack+0x18f/0x20d [ 67.245929][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.251469][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.257009][ T26] ? afs_put_call+0xa40/0xa40 [ 67.261685][ T26] print_address_description.constprop.0.cold+0xd3/0x413 [ 67.268713][ T26] ? vprintk_func+0x97/0x1a6 [ 67.273306][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.278867][ T26] kasan_report.cold+0x1f/0x37 [ 67.283782][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.289413][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.294962][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 67.300355][ T26] ? afs_close_socket+0x320/0x320 [ 67.305387][ T26] ? afs_put_call+0xa40/0xa40 [ 67.310066][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 67.315192][ T26] ? afs_put_call+0xa40/0xa40 [ 67.319872][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.326291][ T26] rxrpc_call_completed+0xca/0xf0 [ 67.331321][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 67.336713][ T26] ? lock_sock_nested+0x94/0x110 [ 67.341658][ T26] rxrpc_listen+0x147/0x360 [ 67.346169][ T26] afs_close_socket+0x95/0x320 [ 67.350929][ T26] ? afs_purge_servers+0x16d/0x300 [ 67.356133][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 67.361601][ T26] ? init_wait_var_entry+0x200/0x200 [ 67.366890][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.372527][ T26] ? check_preemption_disabled+0x38/0x220 [ 67.378252][ T26] afs_net_exit+0x1bc/0x310 [ 67.382781][ T26] ? afs_net_init+0xe30/0xe30 [ 67.387478][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 67.392606][ T26] cleanup_net+0x511/0xa50 [ 67.397138][ T26] ? unregister_pernet_device+0x70/0x70 [ 67.402691][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.408855][ T26] process_one_work+0x965/0x1690 [ 67.413907][ T26] ? lock_release+0x800/0x800 [ 67.418587][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.424010][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 67.428961][ T26] worker_thread+0x96/0xe10 [ 67.433480][ T26] ? process_one_work+0x1690/0x1690 [ 67.438853][ T26] kthread+0x3b5/0x4a0 [ 67.442919][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.448661][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.454385][ T26] ret_from_fork+0x1f/0x30 [ 67.458815][ T26] [ 67.461139][ T26] Allocated by task 6820: [ 67.465471][ T26] save_stack+0x1b/0x40 [ 67.469643][ T26] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 67.475284][ T26] kmem_cache_alloc_trace+0x153/0x7d0 [ 67.480738][ T26] afs_alloc_call+0x55/0x630 [ 67.485357][ T26] afs_charge_preallocation+0xe9/0x2d0 [ 67.490818][ T26] afs_open_socket+0x292/0x360 [ 67.495595][ T26] afs_net_init+0xa6c/0xe30 [ 67.500094][ T26] ops_init+0xaf/0x420 [ 67.504254][ T26] setup_net+0x2de/0x860 [ 67.508500][ T26] copy_net_ns+0x293/0x590 [ 67.513648][ T26] create_new_namespaces+0x3fb/0xb30 [ 67.519041][ T26] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 67.524666][ T26] ksys_unshare+0x43d/0x8e0 [ 67.529169][ T26] __ia32_sys_unshare+0x2c/0x40 [ 67.534036][ T26] do_syscall_32_irqs_on+0x3f/0x60 [ 67.539176][ T26] do_fast_syscall_32+0x7f/0x120 [ 67.544126][ T26] entry_SYSENTER_compat+0x6d/0x7c [ 67.549230][ T26] [ 67.551554][ T26] Freed by task 26: [ 67.555375][ T26] save_stack+0x1b/0x40 [ 67.559540][ T26] __kasan_slab_free+0xf7/0x140 [ 67.564400][ T26] kfree+0x109/0x2b0 [ 67.568316][ T26] afs_put_call+0x585/0xa40 [ 67.572836][ T26] rxrpc_discard_prealloc+0x764/0xab0 [ 67.578217][ T26] rxrpc_listen+0x147/0x360 [ 67.582719][ T26] afs_close_socket+0x95/0x320 [ 67.587488][ T26] afs_net_exit+0x1bc/0x310 [ 67.591995][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 67.597118][ T26] cleanup_net+0x511/0xa50 [ 67.601544][ T26] process_one_work+0x965/0x1690 [ 67.606503][ T26] worker_thread+0x96/0xe10 [ 67.611003][ T26] kthread+0x3b5/0x4a0 [ 67.615069][ T26] ret_from_fork+0x1f/0x30 [ 67.619477][ T26] [ 67.621911][ T26] The buggy address belongs to the object at ffff8880956c3800 [ 67.621911][ T26] which belongs to the cache kmalloc-1k of size 1024 [ 67.636566][ T26] The buggy address is located 484 bytes inside of [ 67.636566][ T26] 1024-byte region [ffff8880956c3800, ffff8880956c3c00) [ 67.649915][ T26] The buggy address belongs to the page: [ 67.655550][ T26] page:ffffea000255b0c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 67.664662][ T26] flags: 0xfffe0000000200(slab) [ 67.669705][ T26] raw: 00fffe0000000200 ffffea0002568948 ffffea00024cfbc8 ffff8880aa000c40 [ 67.678291][ T26] raw: 0000000000000000 ffff8880956c3000 0000000100000002 0000000000000000 [ 67.686951][ T26] page dumped because: kasan: bad access detected [ 67.693353][ T26] [ 67.695671][ T26] Memory state around the buggy address: [ 67.701312][ T26] ffff8880956c3880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.709890][ T26] ffff8880956c3900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.717967][ T26] >ffff8880956c3980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.726019][ T26] ^ [ 67.733383][ T26] ffff8880956c3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.741441][ T26] ffff8880956c3a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.750310][ T26] ================================================================== [ 67.758360][ T26] Disabling lock debugging due to kernel taint [ 67.764680][ T26] Kernel panic - not syncing: panic_on_warn set ... [ 67.771265][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 67.780877][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.790931][ T26] Workqueue: netns cleanup_net [ 67.795683][ T26] Call Trace: [ 67.798970][ T26] dump_stack+0x18f/0x20d [ 67.803298][ T26] ? afs_wake_up_async_call+0x670/0x770 [ 67.809967][ T26] ? afs_put_call+0xa40/0xa40 [ 67.814655][ T26] panic+0x2e3/0x75c [ 67.818546][ T26] ? __warn_printk+0xf3/0xf3 [ 67.823135][ T26] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 67.829295][ T26] ? trace_hardirqs_on+0x55/0x220 [ 67.834398][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.839931][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.845467][ T26] ? afs_put_call+0xa40/0xa40 [ 67.850225][ T26] end_report+0x4d/0x53 [ 67.854383][ T26] kasan_report.cold+0xd/0x37 [ 67.859053][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 67.864674][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 67.870215][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 67.875594][ T26] ? afs_close_socket+0x320/0x320 [ 67.880701][ T26] ? afs_put_call+0xa40/0xa40 [ 67.885368][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 67.890491][ T26] ? afs_put_call+0xa40/0xa40 [ 67.895158][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 67.902018][ T26] rxrpc_call_completed+0xca/0xf0 [ 67.907037][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 67.912402][ T26] ? lock_sock_nested+0x94/0x110 [ 67.917332][ T26] rxrpc_listen+0x147/0x360 [ 67.921827][ T26] afs_close_socket+0x95/0x320 [ 67.926580][ T26] ? afs_purge_servers+0x16d/0x300 [ 67.931686][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 67.937156][ T26] ? init_wait_var_entry+0x200/0x200 [ 67.942614][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 67.948238][ T26] ? check_preemption_disabled+0x38/0x220 [ 67.953953][ T26] afs_net_exit+0x1bc/0x310 [ 67.958454][ T26] ? afs_net_init+0xe30/0xe30 [ 67.963154][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 67.968257][ T26] cleanup_net+0x511/0xa50 [ 67.972667][ T26] ? unregister_pernet_device+0x70/0x70 [ 67.978204][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.984174][ T26] process_one_work+0x965/0x1690 [ 67.989107][ T26] ? lock_release+0x800/0x800 [ 67.993778][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.999247][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 68.004182][ T26] worker_thread+0x96/0xe10 [ 68.008680][ T26] ? process_one_work+0x1690/0x1690 [ 68.013886][ T26] kthread+0x3b5/0x4a0 [ 68.017959][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.023668][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.029389][ T26] ret_from_fork+0x1f/0x30 [ 68.035604][ T26] Kernel Offset: disabled [ 68.040008][ T26] Rebooting in 86400 seconds..