[ 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... [ 58.884549][ T7] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:0/7 [ 58.893520][ T7] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.899928][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 58.908091][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.918165][ T7] Workqueue: writeback wb_workfn (flush-8:0) [ 58.924148][ T7] Call Trace: [ 58.927450][ T7] dump_stack+0x18f/0x20d [ 58.931800][ T7] check_preemption_disabled+0x20d/0x220 [ 58.937445][ T7] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.942569][ T7] ? ext4_find_extent+0x81a/0xad0 [ 58.943929][ T6730] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6730 [ 58.947693][ T7] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.957091][ T6730] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.962496][ T7] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.974054][ T7] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.979337][ T7] ? ext4_ext_release+0x10/0x10 [ 58.984188][ T7] ? down_write_killable+0x170/0x170 [ 58.989456][ T7] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.994906][ T7] ext4_map_blocks+0x4cb/0x1640 [ 58.999748][ T7] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.005036][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.010569][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.016556][ T7] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 59.022004][ T7] ext4_writepages+0x1a7b/0x33c0 [ 59.026945][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.032567][ T7] ? __lock_acquire+0x2224/0x48b0 [ 59.037611][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.043581][ T7] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 59.049551][ T7] ? __ext4_mark_inode_dirty+0x940/0x940 [ 59.055171][ T7] ? do_writepages+0xfa/0x2a0 [ 59.059830][ T7] do_writepages+0xfa/0x2a0 [ 59.064322][ T7] ? page_writeback_cpu_online+0x10/0x10 [ 59.069945][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.075478][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.081439][ T7] ? lock_downgrade+0x840/0x840 [ 59.086281][ T7] __writeback_single_inode+0x12a/0x13d0 [ 59.091912][ T7] ? _raw_spin_unlock+0x24/0x40 [ 59.096746][ T7] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 59.102723][ T7] writeback_sb_inodes+0x515/0xdc0 [ 59.107845][ T7] ? __writeback_single_inode+0x13d0/0x13d0 [ 59.113738][ T7] __writeback_inodes_wb+0xc3/0x250 [ 59.118929][ T7] wb_writeback+0x8db/0xd50 [ 59.123425][ T7] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 59.129741][ T7] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 59.135623][ T7] ? cpumask_next+0x3c/0x40 [ 59.140111][ T7] ? get_nr_dirty_inodes+0xd6/0x130 [ 59.145301][ T7] wb_workfn+0xab3/0x1090 [ 59.149634][ T7] ? inode_wait_for_writeback+0x30/0x30 [ 59.155170][ T7] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.160700][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.166677][ T7] process_one_work+0x965/0x1690 [ 59.171605][ T7] ? lock_release+0x800/0x800 [ 59.176268][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 59.181627][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 59.186556][ T7] worker_thread+0x96/0xe10 [ 59.191059][ T7] ? process_one_work+0x1690/0x1690 [ 59.196248][ T7] kthread+0x3b5/0x4a0 [ 59.200309][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.206011][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.211718][ T7] ret_from_fork+0x1f/0x30 [ 59.216152][ T6730] CPU: 1 PID: 6730 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 59.224744][ T6730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.235059][ T6730] Call Trace: [ 59.238362][ T6730] dump_stack+0x18f/0x20d [ 59.242709][ T6730] check_preemption_disabled+0x20d/0x220 [ 59.248436][ T6730] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.253581][ T6730] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.259018][ T6730] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.264720][ T6730] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.269988][ T6730] ? ext4_ext_release+0x10/0x10 [ 59.274829][ T6730] ? down_write_killable+0x170/0x170 [ 59.280097][ T6730] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.285539][ T6730] ext4_map_blocks+0x4cb/0x1640 [ 59.290376][ T6730] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.295574][ T6730] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.301098][ T6730] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.307070][ T6730] ? prandom_u32_state+0xe/0x170 [ 59.311985][ T6730] ? __brelse+0x84/0xa0 [ 59.316137][ T6730] ? __ext4_new_inode+0x144/0x55e0 [ 59.321241][ T6730] ext4_getblk+0xad/0x520 [ 59.325554][ T6730] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.331254][ T6730] ? ext4_free_inode+0x1700/0x1700 [ 59.336346][ T6730] ext4_bread+0x7c/0x380 [ 59.340583][ T6730] ? ext4_getblk+0x520/0x520 [ 59.345150][ T6730] ? dquot_get_next_dqblk+0x180/0x180 [ 59.350505][ T6730] ext4_append+0x153/0x360 [ 59.354904][ T6730] ext4_mkdir+0x5e0/0xdf0 [ 59.359215][ T6730] ? ext4_rmdir+0xde0/0xde0 [ 59.363787][ T6730] ? security_inode_permission+0xc4/0xf0 [ 59.369432][ T6730] vfs_mkdir+0x419/0x690 [ 59.373653][ T6730] do_mkdirat+0x21e/0x280 [ 59.377978][ T6730] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.382808][ T6730] ? do_syscall_64+0x1c/0xe0 [ 59.387376][ T6730] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.393349][ T6730] do_syscall_64+0x60/0xe0 [ 59.397769][ T6730] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.403638][ T6730] RIP: 0033:0x7f1b2b1d3687 [ 59.408038][ T6730] Code: Bad RIP value. [ 59.412083][ T6730] RSP: 002b:00007ffecddfa548 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.420477][ T6730] RAX: ffffffffffffffda RBX: 000055e765d15985 RCX: 00007f1b2b1d3687 [ 59.428448][ T6730] RDX: 00007ffecddfa410 RSI: 00000000000001ed RDI: 000055e765d15985 [ 59.436400][ T6730] RBP: 00007f1b2b1d3680 R08: 0000000000000100 R09: 0000000000000000 [ 59.444352][ T6730] R10: 000055e765d15980 R11: 0000000000000246 R12: 00000000000001ed [ 59.452303][ T6730] R13: 00007ffecddfa6d0 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.194' (ECDSA) to the list of known hosts. 2020/06/15 08:14:29 fuzzer started 2020/06/15 08:14:29 connecting to host at 10.128.0.26:41227 2020/06/15 08:14:29 checking machine... 2020/06/15 08:14:29 checking revisions... 2020/06/15 08:14:30 testing simple program... syzkaller login: [ 64.460180][ T6801] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6801 [ 64.469279][ T6801] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.476327][ T6801] CPU: 1 PID: 6801 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 64.484563][ T6801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.495074][ T6801] Call Trace: [ 64.498350][ T6801] dump_stack+0x18f/0x20d [ 64.502684][ T6801] check_preemption_disabled+0x20d/0x220 [ 64.508295][ T6801] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.513391][ T6801] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.518841][ T6801] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.524543][ T6801] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.529810][ T6801] ? ext4_ext_release+0x10/0x10 [ 64.534654][ T6801] ? down_write_killable+0x170/0x170 [ 64.539915][ T6801] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.545355][ T6801] ext4_map_blocks+0x4cb/0x1640 [ 64.550201][ T6801] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.555378][ T6801] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.560902][ T6801] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.566860][ T6801] ? prandom_u32_state+0xe/0x170 [ 64.571774][ T6801] ? __brelse+0x84/0xa0 [ 64.575907][ T6801] ? __ext4_new_inode+0x144/0x55e0 [ 64.581005][ T6801] ext4_getblk+0xad/0x520 [ 64.585320][ T6801] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.591036][ T6801] ? ext4_free_inode+0x1700/0x1700 [ 64.596147][ T6801] ext4_bread+0x7c/0x380 [ 64.600385][ T6801] ? ext4_getblk+0x520/0x520 [ 64.604969][ T6801] ? dquot_get_next_dqblk+0x180/0x180 [ 64.610341][ T6801] ext4_append+0x153/0x360 [ 64.614833][ T6801] ext4_mkdir+0x5e0/0xdf0 [ 64.619165][ T6801] ? ext4_rmdir+0xde0/0xde0 [ 64.623654][ T6801] ? security_inode_permission+0xc4/0xf0 [ 64.629271][ T6801] vfs_mkdir+0x419/0x690 [ 64.633514][ T6801] do_mkdirat+0x21e/0x280 [ 64.637889][ T6801] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.642738][ T6801] ? do_syscall_64+0x1c/0xe0 [ 64.647338][ T6801] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.653296][ T6801] do_syscall_64+0x60/0xe0 [ 64.657705][ T6801] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.663579][ T6801] RIP: 0033:0x4b02a0 [ 64.667445][ T6801] Code: Bad RIP value. [ 64.671485][ T6801] RSP: 002b:000000c00022b4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 64.679885][ T6801] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 64.687844][ T6801] RDX: 00000000000001c0 RSI: 000000c00009eca0 RDI: ffffffffffffff9c [ 64.695794][ T6801] RBP: 000000c00022b510 R08: 0000000000000000 R09: 0000000000000000 [ 64.703742][ T6801] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 64.711688][ T6801] R13: 0000000000000066 R14: 0000000000000065 R15: 0000000000000100 [ 64.747350][ T6805] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6805 [ 64.756828][ T6805] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.762814][ T6805] CPU: 1 PID: 6805 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.771399][ T6805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.781464][ T6805] Call Trace: [ 64.784752][ T6805] dump_stack+0x18f/0x20d [ 64.789096][ T6805] check_preemption_disabled+0x20d/0x220 [ 64.794754][ T6805] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.799911][ T6805] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.805375][ T6805] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.811110][ T6805] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.816414][ T6805] ? ext4_ext_release+0x10/0x10 [ 64.821315][ T6805] ? down_write_killable+0x170/0x170 [ 64.826578][ T6805] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.832035][ T6805] ext4_map_blocks+0x4cb/0x1640 [ 64.836885][ T6805] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.842060][ T6805] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.847587][ T6805] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.853554][ T6805] ? prandom_u32_state+0xe/0x170 [ 64.858469][ T6805] ? __brelse+0x84/0xa0 [ 64.862713][ T6805] ? __ext4_new_inode+0x144/0x55e0 [ 64.867803][ T6805] ext4_getblk+0xad/0x520 [ 64.872126][ T6805] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.877825][ T6805] ? ext4_free_inode+0x1700/0x1700 [ 64.882914][ T6805] ext4_bread+0x7c/0x380 [ 64.887133][ T6805] ? ext4_getblk+0x520/0x520 [ 64.891700][ T6805] ? dquot_get_next_dqblk+0x180/0x180 [ 64.897071][ T6805] ext4_append+0x153/0x360 [ 64.901465][ T6805] ext4_mkdir+0x5e0/0xdf0 [ 64.905777][ T6805] ? ext4_rmdir+0xde0/0xde0 [ 64.910264][ T6805] ? security_inode_permission+0xc4/0xf0 [ 64.915891][ T6805] vfs_mkdir+0x419/0x690 [ 64.920129][ T6805] do_mkdirat+0x21e/0x280 [ 64.924438][ T6805] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.929267][ T6805] ? do_fast_syscall_32+0x40/0x120 [ 64.934361][ T6805] do_syscall_32_irqs_on+0x3f/0x60 [ 64.939455][ T6805] do_fast_syscall_32+0x7f/0x120 [ 64.944377][ T6805] entry_SYSENTER_compat+0x6d/0x7c [ 64.949465][ T6805] RIP: 0023:0xf7f81569 [ 64.953504][ T6805] Code: Bad RIP value. [ 64.957560][ T6805] RSP: 002b:00000000ff9b1ebc EFLAGS: 00000296 ORIG_RAX: 0000000000000027 [ 64.965953][ T6805] RAX: ffffffffffffffda RBX: 00000000ff9b2079 RCX: 00000000000001c0 [ 64.974210][ T6805] RDX: 0000000000000001 RSI: 000000005044b208 RDI: 000000000000002b [ 64.982171][ T6805] RBP: 00000000ff9b2085 R08: 0000000000000000 R09: 0000000000000000 [ 64.990136][ T6805] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 64.998083][ T6805] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 65.084617][ T6806] IPVS: ftp: loaded support on port[0] = 21 [ 65.121850][ T6806] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6806 [ 65.131312][ T6806] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.137430][ T6806] CPU: 0 PID: 6806 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.146007][ T6806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.156132][ T6806] Call Trace: [ 65.159436][ T6806] dump_stack+0x18f/0x20d [ 65.163778][ T6806] check_preemption_disabled+0x20d/0x220 [ 65.169392][ T6806] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.174492][ T6806] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.179930][ T6806] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.185640][ T6806] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.191170][ T6806] ? ext4_ext_release+0x10/0x10 [ 65.196129][ T6806] ? down_write_killable+0x170/0x170 [ 65.201391][ T6806] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.206832][ T6806] ext4_map_blocks+0x4cb/0x1640 [ 65.211681][ T6806] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.216858][ T6806] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.222383][ T6806] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.228356][ T6806] ? prandom_u32_state+0xe/0x170 [ 65.233296][ T6806] ? __brelse+0x84/0xa0 [ 65.237429][ T6806] ? __ext4_new_inode+0x144/0x55e0 [ 65.242519][ T6806] ext4_getblk+0xad/0x520 [ 65.246828][ T6806] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.252527][ T6806] ? ext4_free_inode+0x1700/0x1700 [ 65.257616][ T6806] ext4_bread+0x7c/0x380 [ 65.261851][ T6806] ? ext4_getblk+0x520/0x520 [ 65.266431][ T6806] ? dquot_get_next_dqblk+0x180/0x180 [ 65.271783][ T6806] ext4_append+0x153/0x360 [ 65.276196][ T6806] ext4_mkdir+0x5e0/0xdf0 [ 65.280514][ T6806] ? ext4_rmdir+0xde0/0xde0 [ 65.284998][ T6806] ? security_inode_permission+0xc4/0xf0 [ 65.290626][ T6806] vfs_mkdir+0x419/0x690 [ 65.294851][ T6806] do_mkdirat+0x21e/0x280 [ 65.299175][ T6806] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.304007][ T6806] ? do_fast_syscall_32+0x40/0x120 [ 65.309113][ T6806] do_syscall_32_irqs_on+0x3f/0x60 [ 65.314199][ T6806] do_fast_syscall_32+0x7f/0x120 [ 65.319126][ T6806] entry_SYSENTER_compat+0x6d/0x7c [ 65.324212][ T6806] RIP: 0023:0xf7f81569 [ 65.328251][ T6806] Code: Bad RIP value. [ 65.332310][ T6806] RSP: 002b:00000000086aff7c EFLAGS: 00000246 ORIG_RAX: 0000000000000027 [ 65.340696][ T6806] RAX: ffffffffffffffda RBX: 00000000080d83c9 RCX: 00000000000001ff [ 65.348656][ T6806] RDX: 0000000008055970 RSI: 0000000000000000 RDI: 0000000030000000 [ 65.356673][ T6806] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 65.364656][ T6806] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 65.372606][ T6806] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 2020/06/15 08:14:31 building call list... [ 65.722488][ T7] tipc: TX() has been purged, node left! [ 66.204557][ T7] ================================================================== [ 66.212795][ T7] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 66.220677][ T7] Write of size 1 at addr ffff8880a926a1e4 by task kworker/u4:0/7 [ 66.228469][ T7] [ 66.230811][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.238950][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.249006][ T7] Workqueue: netns cleanup_net [ 66.253760][ T7] Call Trace: [ 66.257050][ T7] dump_stack+0x18f/0x20d [ 66.261380][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.266921][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.272463][ T7] ? afs_put_call+0xa40/0xa40 [ 66.277138][ T7] print_address_description.constprop.0.cold+0xd3/0x413 [ 66.284163][ T7] ? vprintk_func+0x97/0x1a6 [ 66.288756][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.294298][ T7] kasan_report.cold+0x1f/0x37 [ 66.299063][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.304690][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.310235][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 66.315602][ T7] ? afs_close_socket+0x320/0x320 [ 66.320624][ T7] ? afs_put_call+0xa40/0xa40 [ 66.325300][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 66.330439][ T7] ? afs_put_call+0xa40/0xa40 [ 66.335119][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.341533][ T7] rxrpc_call_completed+0xca/0xf0 [ 66.346559][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 66.351933][ T7] ? lock_sock_nested+0x94/0x110 [ 66.356873][ T7] rxrpc_listen+0x147/0x360 [ 66.361469][ T7] afs_close_socket+0x95/0x320 [ 66.366232][ T7] ? afs_purge_servers+0x16d/0x300 [ 66.371340][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 66.376826][ T7] ? init_wait_var_entry+0x200/0x200 [ 66.382140][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.387777][ T7] ? check_preemption_disabled+0x38/0x220 [ 66.393515][ T7] afs_net_exit+0x1bc/0x310 [ 66.398018][ T7] ? afs_net_init+0xe30/0xe30 [ 66.402689][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 66.407800][ T7] cleanup_net+0x511/0xa50 [ 66.412219][ T7] ? unregister_pernet_device+0x70/0x70 [ 66.417767][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.423764][ T7] process_one_work+0x965/0x1690 [ 66.428718][ T7] ? lock_release+0x800/0x800 [ 66.433402][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.438779][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 66.443753][ T7] worker_thread+0x96/0xe10 [ 66.448274][ T7] ? process_one_work+0x1690/0x1690 [ 66.453472][ T7] kthread+0x3b5/0x4a0 [ 66.457543][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.463257][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.468984][ T7] ret_from_fork+0x1f/0x30 [ 66.473409][ T7] [ 66.475730][ T7] Allocated by task 6806: [ 66.480058][ T7] save_stack+0x1b/0x40 [ 66.484212][ T7] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 66.489840][ T7] kmem_cache_alloc_trace+0x153/0x7d0 [ 66.495207][ T7] afs_alloc_call+0x55/0x630 [ 66.499792][ T7] afs_charge_preallocation+0xe9/0x2d0 [ 66.505243][ T7] afs_open_socket+0x292/0x360 [ 66.510008][ T7] afs_net_init+0xa6c/0xe30 [ 66.514506][ T7] ops_init+0xaf/0x420 [ 66.518567][ T7] setup_net+0x2de/0x860 [ 66.522804][ T7] copy_net_ns+0x293/0x590 [ 66.527226][ T7] create_new_namespaces+0x3fb/0xb30 [ 66.532508][ T7] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 66.538146][ T7] ksys_unshare+0x43d/0x8e0 [ 66.542646][ T7] __ia32_sys_unshare+0x2c/0x40 [ 66.547495][ T7] do_syscall_32_irqs_on+0x3f/0x60 [ 66.552605][ T7] do_fast_syscall_32+0x7f/0x120 [ 66.557560][ T7] entry_SYSENTER_compat+0x6d/0x7c [ 66.562656][ T7] [ 66.564977][ T7] Freed by task 7: [ 66.568693][ T7] save_stack+0x1b/0x40 [ 66.572843][ T7] __kasan_slab_free+0xf7/0x140 [ 66.577686][ T7] kfree+0x109/0x2b0 [ 66.581577][ T7] afs_put_call+0x585/0xa40 [ 66.586218][ T7] rxrpc_discard_prealloc+0x764/0xab0 [ 66.591604][ T7] rxrpc_listen+0x147/0x360 [ 66.596255][ T7] afs_close_socket+0x95/0x320 [ 66.601030][ T7] afs_net_exit+0x1bc/0x310 [ 66.605542][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 66.610646][ T7] cleanup_net+0x511/0xa50 [ 66.615058][ T7] process_one_work+0x965/0x1690 [ 66.619989][ T7] worker_thread+0x96/0xe10 [ 66.624489][ T7] kthread+0x3b5/0x4a0 [ 66.628583][ T7] ret_from_fork+0x1f/0x30 [ 66.632991][ T7] [ 66.635317][ T7] The buggy address belongs to the object at ffff8880a926a000 [ 66.635317][ T7] which belongs to the cache kmalloc-1k of size 1024 [ 66.649576][ T7] The buggy address is located 484 bytes inside of [ 66.649576][ T7] 1024-byte region [ffff8880a926a000, ffff8880a926a400) [ 66.663142][ T7] The buggy address belongs to the page: [ 66.668780][ T7] page:ffffea0002a49a80 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a926a800 [ 66.679177][ T7] flags: 0xfffe0000000200(slab) [ 66.684144][ T7] raw: 00fffe0000000200 ffff8880aa001840 ffffea00027bf148 ffff8880aa000c40 [ 66.692736][ T7] raw: ffff8880a926a800 ffff8880a926a000 0000000100000001 0000000000000000 [ 66.701411][ T7] page dumped because: kasan: bad access detected [ 66.707816][ T7] [ 66.710136][ T7] Memory state around the buggy address: [ 66.715764][ T7] ffff8880a926a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.723828][ T7] ffff8880a926a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.731979][ T7] >ffff8880a926a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.740030][ T7] ^ [ 66.747219][ T7] ffff8880a926a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.755278][ T7] ffff8880a926a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.763328][ T7] ================================================================== [ 66.771377][ T7] Disabling lock debugging due to kernel taint [ 66.777560][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 66.784146][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 66.793756][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.803807][ T7] Workqueue: netns cleanup_net [ 66.808551][ T7] Call Trace: [ 66.811838][ T7] dump_stack+0x18f/0x20d [ 66.816161][ T7] ? afs_wake_up_async_call+0x670/0x770 [ 66.821705][ T7] ? afs_put_call+0xa40/0xa40 [ 66.826375][ T7] panic+0x2e3/0x75c [ 66.830267][ T7] ? __warn_printk+0xf3/0xf3 [ 66.834858][ T7] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 66.841012][ T7] ? trace_hardirqs_on+0x55/0x220 [ 66.846036][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.851576][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.857118][ T7] ? afs_put_call+0xa40/0xa40 [ 66.861792][ T7] end_report+0x4d/0x53 [ 66.865941][ T7] kasan_report.cold+0xd/0x37 [ 66.870612][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.876236][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.881779][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 66.887145][ T7] ? afs_close_socket+0x320/0x320 [ 66.892166][ T7] ? afs_put_call+0xa40/0xa40 [ 66.896834][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 66.901938][ T7] ? afs_put_call+0xa40/0xa40 [ 66.906608][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.913013][ T7] rxrpc_call_completed+0xca/0xf0 [ 66.918033][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 66.923401][ T7] ? lock_sock_nested+0x94/0x110 [ 66.928337][ T7] rxrpc_listen+0x147/0x360 [ 66.932917][ T7] afs_close_socket+0x95/0x320 [ 66.937674][ T7] ? afs_purge_servers+0x16d/0x300 [ 66.942776][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 66.948230][ T7] ? init_wait_var_entry+0x200/0x200 [ 66.953516][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.959140][ T7] ? check_preemption_disabled+0x38/0x220 [ 66.964913][ T7] afs_net_exit+0x1bc/0x310 [ 66.969424][ T7] ? afs_net_init+0xe30/0xe30 [ 66.974092][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 66.979194][ T7] cleanup_net+0x511/0xa50 [ 66.983600][ T7] ? unregister_pernet_device+0x70/0x70 [ 66.989141][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.995114][ T7] process_one_work+0x965/0x1690 [ 67.000046][ T7] ? lock_release+0x800/0x800 [ 67.004718][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.010081][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 67.015026][ T7] worker_thread+0x96/0xe10 [ 67.019552][ T7] ? process_one_work+0x1690/0x1690 [ 67.024744][ T7] kthread+0x3b5/0x4a0 [ 67.028844][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.034558][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.040274][ T7] ret_from_fork+0x1f/0x30 [ 67.046232][ T7] Kernel Offset: disabled [ 67.050550][ T7] Rebooting in 86400 seconds..