[ 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. [ 64.429401][ T6798] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6798 [ 64.439233][ T6798] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.445122][ T6798] CPU: 1 PID: 6798 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 64.453907][ T6798] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.463967][ T6798] Call Trace: [ 64.467274][ T6798] dump_stack+0x18f/0x20d [ 64.471705][ T6798] check_preemption_disabled+0x20d/0x220 [ 64.477510][ T6798] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.482756][ T6798] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.488252][ T6798] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.493982][ T6798] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.499296][ T6798] ? ext4_ext_release+0x10/0x10 [ 64.504664][ T6798] ? down_write_killable+0x170/0x170 [ 64.510117][ T6798] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.515583][ T6798] ext4_map_blocks+0x4cb/0x1640 [ 64.520493][ T6798] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.525697][ T6798] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.531231][ T6798] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.537216][ T6798] ? prandom_u32_state+0xe/0x170 [ 64.542161][ T6798] ? __brelse+0x84/0xa0 [ 64.546312][ T6798] ? __ext4_new_inode+0x144/0x55e0 [ 64.551784][ T6798] ext4_getblk+0xad/0x520 [ 64.556182][ T6798] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.562086][ T6798] ? ext4_free_inode+0x1700/0x1700 [ 64.567344][ T6798] ext4_bread+0x7c/0x380 [ 64.571719][ T6798] ? ext4_getblk+0x520/0x520 [ 64.576310][ T6798] ? dquot_get_next_dqblk+0x180/0x180 [ 64.581687][ T6798] ext4_append+0x153/0x360 [ 64.586468][ T6798] ext4_mkdir+0x5e0/0xdf0 [ 64.590974][ T6798] ? ext4_rmdir+0xde0/0xde0 [ 64.595558][ T6798] ? security_inode_permission+0xc4/0xf0 [ 64.603876][ T6798] vfs_mkdir+0x419/0x690 [ 64.608313][ T6798] do_mkdirat+0x21e/0x280 [ 64.612665][ T6798] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.617573][ T6798] ? do_syscall_64+0x1c/0xe0 [ 64.622282][ T6798] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.628261][ T6798] do_syscall_64+0x60/0xe0 [ 64.632680][ T6798] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.638561][ T6798] RIP: 0033:0x7f337f427687 [ 64.643051][ T6798] Code: Bad RIP value. [ 64.647129][ T6798] RSP: 002b:00007ffd8f63e498 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 64.655559][ T6798] RAX: ffffffffffffffda RBX: 00005645e61c0985 RCX: 00007f337f427687 [ 64.663551][ T6798] RDX: 00007ffd8f63e360 RSI: 00000000000001ed RDI: 00005645e61c0985 [ 64.671807][ T6798] RBP: 00007f337f427680 R08: 0000000000000100 R09: 0000000000000000 [ 64.679794][ T6798] R10: 00005645e61c0980 R11: 0000000000000246 R12: 00000000000001ed [ 64.687837][ T6798] R13: 00007ffd8f63e620 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.247' (ECDSA) to the list of known hosts. 2020/06/16 13:32:56 fuzzer started 2020/06/16 13:32:56 connecting to host at 10.128.0.26:37485 2020/06/16 13:32:56 checking machine... 2020/06/16 13:32:56 checking revisions... 2020/06/16 13:32:56 testing simple program... syzkaller login: [ 69.411329][ T6805] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6805 [ 69.420618][ T6805] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 69.426717][ T6805] CPU: 0 PID: 6805 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 69.434964][ T6805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.445436][ T6805] Call Trace: [ 69.448737][ T6805] dump_stack+0x18f/0x20d [ 69.454411][ T6805] check_preemption_disabled+0x20d/0x220 [ 69.460033][ T6805] ext4_mb_new_blocks+0xa4d/0x3b70 [ 69.465259][ T6805] ? ext4_ext_search_right+0x2ca/0xb20 [ 69.470887][ T6805] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 69.476637][ T6805] ext4_ext_map_blocks+0x201b/0x33e0 [ 69.482028][ T6805] ? ext4_ext_release+0x10/0x10 [ 69.486900][ T6805] ? down_write_killable+0x170/0x170 [ 69.492277][ T6805] ? ext4_es_lookup_extent+0x41d/0xd10 [ 69.497854][ T6805] ext4_map_blocks+0x4cb/0x1640 [ 69.502709][ T6805] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 69.507897][ T6805] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.513430][ T6805] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.519392][ T6805] ? prandom_u32_state+0xe/0x170 [ 69.524316][ T6805] ? __brelse+0x84/0xa0 [ 69.528463][ T6805] ? __ext4_new_inode+0x144/0x55e0 [ 69.533561][ T6805] ext4_getblk+0xad/0x520 [ 69.537979][ T6805] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 69.543717][ T6805] ? ext4_free_inode+0x1700/0x1700 [ 69.548820][ T6805] ext4_bread+0x7c/0x380 [ 69.553135][ T6805] ? ext4_getblk+0x520/0x520 [ 69.557707][ T6805] ? dquot_get_next_dqblk+0x180/0x180 [ 69.563227][ T6805] ext4_append+0x153/0x360 [ 69.567783][ T6805] ext4_mkdir+0x5e0/0xdf0 [ 69.572310][ T6805] ? ext4_rmdir+0xde0/0xde0 [ 69.576873][ T6805] ? security_inode_permission+0xc4/0xf0 [ 69.582513][ T6805] vfs_mkdir+0x419/0x690 [ 69.586750][ T6805] do_mkdirat+0x21e/0x280 [ 69.591082][ T6805] ? __ia32_sys_mknod+0xb0/0xb0 [ 69.595916][ T6805] ? do_syscall_64+0x1c/0xe0 [ 69.600629][ T6805] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 69.606735][ T6805] do_syscall_64+0x60/0xe0 [ 69.611156][ T6805] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.617034][ T6805] RIP: 0033:0x4b02a0 [ 69.620922][ T6805] Code: Bad RIP value. [ 69.624969][ T6805] RSP: 002b:000000c0000df4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 69.633377][ T6805] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 69.641444][ T6805] RDX: 00000000000001c0 RSI: 000000c00032c8e0 RDI: ffffffffffffff9c [ 69.649414][ T6805] RBP: 000000c0000df510 R08: 0000000000000000 R09: 0000000000000000 [ 69.658558][ T6805] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 69.666510][ T6805] R13: 0000000000000048 R14: 0000000000000047 R15: 0000000000000100 [ 69.695596][ T6823] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6823 [ 69.705085][ T6823] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 69.711117][ T6823] CPU: 0 PID: 6823 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 69.720096][ T6823] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.730422][ T6823] Call Trace: [ 69.733728][ T6823] dump_stack+0x18f/0x20d [ 69.738104][ T6823] check_preemption_disabled+0x20d/0x220 [ 69.743868][ T6823] ext4_mb_new_blocks+0xa4d/0x3b70 [ 69.749034][ T6823] ? ext4_ext_search_right+0x2ca/0xb20 [ 69.754525][ T6823] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 69.760361][ T6823] ext4_ext_map_blocks+0x201b/0x33e0 [ 69.765691][ T6823] ? ext4_ext_release+0x10/0x10 [ 69.770596][ T6823] ? down_write_killable+0x170/0x170 [ 69.776189][ T6823] ? ext4_es_lookup_extent+0x41d/0xd10 [ 69.781705][ T6823] ext4_map_blocks+0x4cb/0x1640 [ 69.787582][ T6823] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 69.792785][ T6823] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.798325][ T6823] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.804294][ T6823] ? prandom_u32_state+0xe/0x170 [ 69.809245][ T6823] ? __brelse+0x84/0xa0 [ 69.813388][ T6823] ? __ext4_new_inode+0x144/0x55e0 [ 69.818488][ T6823] ext4_getblk+0xad/0x520 [ 69.822808][ T6823] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 69.828518][ T6823] ? ext4_free_inode+0x1700/0x1700 [ 69.833617][ T6823] ext4_bread+0x7c/0x380 [ 69.837856][ T6823] ? ext4_getblk+0x520/0x520 [ 69.842430][ T6823] ? dquot_get_next_dqblk+0x180/0x180 [ 69.847812][ T6823] ext4_append+0x153/0x360 [ 69.852228][ T6823] ext4_mkdir+0x5e0/0xdf0 [ 69.856552][ T6823] ? ext4_rmdir+0xde0/0xde0 [ 69.861060][ T6823] ? security_inode_permission+0xc4/0xf0 [ 69.866706][ T6823] vfs_mkdir+0x419/0x690 [ 69.871036][ T6823] do_mkdirat+0x21e/0x280 [ 69.875383][ T6823] ? __ia32_sys_mknod+0xb0/0xb0 [ 69.880248][ T6823] ? do_syscall_64+0x1c/0xe0 [ 69.884842][ T6823] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 69.890807][ T6823] do_syscall_64+0x60/0xe0 [ 69.895215][ T6823] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.901190][ T6823] RIP: 0033:0x45bed7 [ 69.905076][ T6823] Code: Bad RIP value. [ 69.909208][ T6823] RSP: 002b:00007ffff677e288 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 69.917599][ T6823] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 69.925554][ T6823] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffff677e460 [ 69.933509][ T6823] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003200 [ 69.941463][ T6823] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 69.949432][ T6823] R13: 00007ffff677e460 R14: 8421084210842109 R15: 00007ffff677e46c [ 70.078424][ T6825] IPVS: ftp: loaded support on port[0] = 21 [ 70.119908][ T6825] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6825 [ 70.129421][ T6825] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 70.135325][ T6825] CPU: 1 PID: 6825 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 70.143894][ T6825] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.153964][ T6825] Call Trace: [ 70.157255][ T6825] dump_stack+0x18f/0x20d [ 70.161598][ T6825] check_preemption_disabled+0x20d/0x220 [ 70.167684][ T6825] ext4_mb_new_blocks+0xa4d/0x3b70 [ 70.172882][ T6825] ? ext4_ext_search_right+0x2ca/0xb20 [ 70.178580][ T6825] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 70.184297][ T6825] ext4_ext_map_blocks+0x201b/0x33e0 [ 70.189590][ T6825] ? ext4_ext_release+0x10/0x10 [ 70.194459][ T6825] ? down_write_killable+0x170/0x170 [ 70.199730][ T6825] ? ext4_es_lookup_extent+0x41d/0xd10 [ 70.205182][ T6825] ext4_map_blocks+0x4cb/0x1640 [ 70.210029][ T6825] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 70.215390][ T6825] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.220943][ T6825] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.226930][ T6825] ? prandom_u32_state+0xe/0x170 [ 70.231875][ T6825] ? __brelse+0x84/0xa0 [ 70.236054][ T6825] ? __ext4_new_inode+0x144/0x55e0 [ 70.241179][ T6825] ext4_getblk+0xad/0x520 [ 70.245517][ T6825] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 70.251233][ T6825] ? ext4_free_inode+0x1700/0x1700 [ 70.257259][ T6825] ext4_bread+0x7c/0x380 [ 70.261508][ T6825] ? ext4_getblk+0x520/0x520 [ 70.266106][ T6825] ? dquot_get_next_dqblk+0x180/0x180 [ 70.271495][ T6825] ext4_append+0x153/0x360 [ 70.275900][ T6825] ext4_mkdir+0x5e0/0xdf0 [ 70.280251][ T6825] ? ext4_rmdir+0xde0/0xde0 [ 70.284769][ T6825] ? security_inode_permission+0xc4/0xf0 [ 70.290422][ T6825] vfs_mkdir+0x419/0x690 [ 70.294670][ T6825] do_mkdirat+0x21e/0x280 [ 70.298987][ T6825] ? __ia32_sys_mknod+0xb0/0xb0 [ 70.303822][ T6825] ? do_syscall_64+0x1c/0xe0 [ 70.308405][ T6825] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 70.314373][ T6825] do_syscall_64+0x60/0xe0 [ 70.318779][ T6825] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.324655][ T6825] RIP: 0033:0x45bed7 [ 70.328534][ T6825] Code: Bad RIP value. [ 70.332682][ T6825] RSP: 002b:00007ffff677e178 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 70.341163][ T6825] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 70.349146][ T6825] RDX: 00007ffff677e1c3 RSI: 00000000000001ff RDI: 00007ffff677e1c0 [ 70.357122][ T6825] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 70.365101][ T6825] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 70.373078][ T6825] R13: 00007ffff677e1b0 R14: 0000000000000000 R15: 00007ffff677e1c0 [ 70.432323][ T6825] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6825 [ 70.441934][ T6825] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 70.448672][ T6825] CPU: 0 PID: 6825 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 70.457281][ T6825] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.467350][ T6825] Call Trace: [ 70.470670][ T6825] dump_stack+0x18f/0x20d [ 70.475034][ T6825] check_preemption_disabled+0x20d/0x220 [ 70.480696][ T6825] ext4_mb_new_blocks+0xa4d/0x3b70 [ 70.485857][ T6825] ? ext4_ext_search_right+0x2ca/0xb20 [ 70.491346][ T6825] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 70.497104][ T6825] ext4_ext_map_blocks+0x201b/0x33e0 [ 70.502433][ T6825] ? ext4_ext_release+0x10/0x10 [ 70.507337][ T6825] ? down_write_killable+0x170/0x170 [ 70.512647][ T6825] ? ext4_es_lookup_extent+0x41d/0xd10 [ 70.518563][ T6825] ext4_map_blocks+0x4cb/0x1640 [ 70.523581][ T6825] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 70.528802][ T6825] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.534350][ T6825] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.540363][ T6825] ? prandom_u32_state+0xe/0x170 [ 70.545315][ T6825] ? __brelse+0x84/0xa0 [ 70.549487][ T6825] ? __ext4_new_inode+0x144/0x55e0 [ 70.554688][ T6825] ext4_getblk+0xad/0x520 [ 70.559015][ T6825] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 70.564753][ T6825] ? ext4_free_inode+0x1700/0x1700 [ 70.569853][ T6825] ext4_bread+0x7c/0x380 [ 70.574079][ T6825] ? ext4_getblk+0x520/0x520 [ 70.578657][ T6825] ? dquot_get_next_dqblk+0x180/0x180 [ 70.584062][ T6825] ext4_append+0x153/0x360 [ 70.588485][ T6825] ext4_mkdir+0x5e0/0xdf0 [ 70.592843][ T6825] ? ext4_rmdir+0xde0/0xde0 [ 70.597338][ T6825] ? security_inode_permission+0xc4/0xf0 [ 70.602960][ T6825] vfs_mkdir+0x419/0x690 [ 70.607202][ T6825] do_mkdirat+0x21e/0x280 [ 70.611546][ T6825] ? __ia32_sys_mknod+0xb0/0xb0 [ 70.616382][ T6825] ? do_syscall_64+0x1c/0xe0 [ 70.620977][ T6825] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 70.626983][ T6825] do_syscall_64+0x60/0xe0 [ 70.631400][ T6825] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 70.637299][ T6825] RIP: 0033:0x45bed7 [ 70.641284][ T6825] Code: Bad RIP value. [ 70.645372][ T6825] RSP: 002b:00007ffff677e178 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 70.654227][ T6825] RAX: ffffffffffffffda RBX: 0000000000011319 RCX: 000000000045bed7 [ 70.662194][ T6825] RDX: 00007ffff677e1c3 RSI: 00000000000001ff RDI: 00007ffff677e1c0 [ 70.670161][ T6825] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/16 13:32:58 building call list... [ 70.678120][ T6825] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 70.686163][ T6825] R13: 00007ffff677e1b0 R14: 0000000000011309 R15: 00007ffff677e1c0 [ 70.957084][ T26] tipc: TX() has been purged, node left! [ 71.470002][ T26] ================================================================== [ 71.478411][ T26] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 71.486311][ T26] Write of size 1 at addr ffff8880a37521e4 by task kworker/u4:2/26 [ 71.494191][ T26] [ 71.496528][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 71.504780][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.514872][ T26] Workqueue: netns cleanup_net [ 71.519659][ T26] Call Trace: [ 71.522979][ T26] dump_stack+0x18f/0x20d [ 71.527319][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 71.532864][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 71.538412][ T26] ? afs_put_call+0xa40/0xa40 [ 71.543112][ T26] print_address_description.constprop.0.cold+0xd3/0x413 [ 71.550169][ T26] ? vprintk_func+0x97/0x1a6 [ 71.554779][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 71.560323][ T26] kasan_report.cold+0x1f/0x37 [ 71.565096][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 71.570727][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 71.576277][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 71.581647][ T26] ? afs_close_socket+0x320/0x320 [ 71.586674][ T26] ? afs_put_call+0xa40/0xa40 [ 71.591360][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 71.596884][ T26] ? afs_put_call+0xa40/0xa40 [ 71.601570][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 71.607990][ T26] rxrpc_call_completed+0xca/0xf0 [ 71.613030][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 71.618435][ T26] ? lock_sock_nested+0x94/0x110 [ 71.623401][ T26] rxrpc_listen+0x147/0x360 [ 71.627913][ T26] afs_close_socket+0x95/0x320 [ 71.632681][ T26] ? afs_purge_servers+0x16d/0x300 [ 71.637795][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 71.643260][ T26] ? init_wait_var_entry+0x200/0x200 [ 71.648560][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 71.654203][ T26] ? check_preemption_disabled+0x38/0x220 [ 71.660195][ T26] afs_net_exit+0x1bc/0x310 [ 71.664699][ T26] ? afs_net_init+0xe30/0xe30 [ 71.669378][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 71.674518][ T26] cleanup_net+0x511/0xa50 [ 71.679412][ T26] ? unregister_pernet_device+0x70/0x70 [ 71.684970][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 71.690961][ T26] process_one_work+0x965/0x1690 [ 71.695911][ T26] ? lock_release+0x800/0x800 [ 71.700590][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 71.705969][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 71.710920][ T26] worker_thread+0x96/0xe10 [ 71.715461][ T26] ? process_one_work+0x1690/0x1690 [ 71.720691][ T26] kthread+0x3b5/0x4a0 [ 71.724761][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 71.730748][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 71.736548][ T26] ret_from_fork+0x1f/0x30 [ 71.740977][ T26] [ 71.743302][ T26] Allocated by task 6825: [ 71.747631][ T26] save_stack+0x1b/0x40 [ 71.751786][ T26] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 71.757414][ T26] kmem_cache_alloc_trace+0x153/0x7d0 [ 71.762874][ T26] afs_alloc_call+0x55/0x630 [ 71.767468][ T26] afs_charge_preallocation+0xe9/0x2d0 [ 71.772922][ T26] afs_open_socket+0x292/0x360 [ 71.778028][ T26] afs_net_init+0xa6c/0xe30 [ 71.782533][ T26] ops_init+0xaf/0x420 [ 71.786792][ T26] setup_net+0x2de/0x860 [ 71.791035][ T26] copy_net_ns+0x293/0x590 [ 71.795453][ T26] create_new_namespaces+0x3fb/0xb30 [ 71.800737][ T26] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 71.806381][ T26] ksys_unshare+0x43d/0x8e0 [ 71.810938][ T26] __x64_sys_unshare+0x2d/0x40 [ 71.815750][ T26] do_syscall_64+0x60/0xe0 [ 71.820234][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 71.826169][ T26] [ 71.828514][ T26] Freed by task 26: [ 71.832341][ T26] save_stack+0x1b/0x40 [ 71.836786][ T26] __kasan_slab_free+0xf7/0x140 [ 71.841660][ T26] kfree+0x109/0x2b0 [ 71.845687][ T26] afs_put_call+0x585/0xa40 [ 71.850241][ T26] rxrpc_discard_prealloc+0x764/0xab0 [ 71.855632][ T26] rxrpc_listen+0x147/0x360 [ 71.860155][ T26] afs_close_socket+0x95/0x320 [ 71.864937][ T26] afs_net_exit+0x1bc/0x310 [ 71.869450][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 71.874561][ T26] cleanup_net+0x511/0xa50 [ 71.878979][ T26] process_one_work+0x965/0x1690 [ 71.885218][ T26] worker_thread+0x96/0xe10 [ 71.889808][ T26] kthread+0x3b5/0x4a0 [ 71.893885][ T26] ret_from_fork+0x1f/0x30 [ 71.898292][ T26] [ 71.900767][ T26] The buggy address belongs to the object at ffff8880a3752000 [ 71.900767][ T26] which belongs to the cache kmalloc-1k of size 1024 [ 71.914835][ T26] The buggy address is located 484 bytes inside of [ 71.914835][ T26] 1024-byte region [ffff8880a3752000, ffff8880a3752400) [ 71.928209][ T26] The buggy address belongs to the page: [ 71.934049][ T26] page:ffffea00028dd480 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 71.943156][ T26] flags: 0xfffe0000000200(slab) [ 71.948023][ T26] raw: 00fffe0000000200 ffffea00025a7848 ffffea00027d15c8 ffff8880aa000c40 [ 71.956615][ T26] raw: 0000000000000000 ffff8880a3752000 0000000100000002 0000000000000000 [ 71.965313][ T26] page dumped because: kasan: bad access detected [ 71.971751][ T26] [ 71.974099][ T26] Memory state around the buggy address: [ 71.979730][ T26] ffff8880a3752080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.988311][ T26] ffff8880a3752100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.996384][ T26] >ffff8880a3752180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.005497][ T26] ^ [ 72.013374][ T26] ffff8880a3752200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.023030][ T26] ffff8880a3752280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.032235][ T26] ================================================================== [ 72.040970][ T26] Disabling lock debugging due to kernel taint [ 72.048729][ T26] Kernel panic - not syncing: panic_on_warn set ... [ 72.055862][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 72.065966][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.076044][ T26] Workqueue: netns cleanup_net [ 72.080812][ T26] Call Trace: [ 72.084134][ T26] dump_stack+0x18f/0x20d [ 72.089428][ T26] ? afs_wake_up_async_call+0x670/0x770 [ 72.095164][ T26] ? afs_put_call+0xa40/0xa40 [ 72.099857][ T26] panic+0x2e3/0x75c [ 72.104206][ T26] ? __warn_printk+0xf3/0xf3 [ 72.108847][ T26] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 72.115214][ T26] ? trace_hardirqs_on+0x55/0x220 [ 72.120437][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 72.126006][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 72.131878][ T26] ? afs_put_call+0xa40/0xa40 [ 72.136757][ T26] end_report+0x4d/0x53 [ 72.141011][ T26] kasan_report.cold+0xd/0x37 [ 72.147360][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 72.153022][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 72.159022][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 72.165505][ T26] ? afs_close_socket+0x320/0x320 [ 72.171010][ T26] ? afs_put_call+0xa40/0xa40 [ 72.175704][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 72.181346][ T26] ? afs_put_call+0xa40/0xa40 [ 72.186212][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 72.193236][ T26] rxrpc_call_completed+0xca/0xf0 [ 72.198351][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 72.203725][ T26] ? lock_sock_nested+0x94/0x110 [ 72.208752][ T26] rxrpc_listen+0x147/0x360 [ 72.213460][ T26] afs_close_socket+0x95/0x320 [ 72.218398][ T26] ? afs_purge_servers+0x16d/0x300 [ 72.223542][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 72.229150][ T26] ? init_wait_var_entry+0x200/0x200 [ 72.234881][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 72.240516][ T26] ? check_preemption_disabled+0x38/0x220 [ 72.246228][ T26] afs_net_exit+0x1bc/0x310 [ 72.250814][ T26] ? afs_net_init+0xe30/0xe30 [ 72.255493][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 72.260616][ T26] cleanup_net+0x511/0xa50 [ 72.265114][ T26] ? unregister_pernet_device+0x70/0x70 [ 72.270678][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 72.276672][ T26] process_one_work+0x965/0x1690 [ 72.281708][ T26] ? lock_release+0x800/0x800 [ 72.286383][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 72.291843][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 72.296778][ T26] worker_thread+0x96/0xe10 [ 72.301312][ T26] ? process_one_work+0x1690/0x1690 [ 72.306503][ T26] kthread+0x3b5/0x4a0 [ 72.310566][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 72.316281][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 72.322032][ T26] ret_from_fork+0x1f/0x30 [ 72.327894][ T26] Kernel Offset: disabled [ 72.332226][ T26] Rebooting in 86400 seconds..