[ 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... [ 60.149168][ T6749] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6749 [ 60.158894][ T6749] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.165535][ T6749] CPU: 0 PID: 6749 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 60.174126][ T6749] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.184254][ T6749] Call Trace: [ 60.187536][ T6749] dump_stack+0x18f/0x20d [ 60.191869][ T6749] check_preemption_disabled+0x20d/0x220 [ 60.195403][ T132] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:3/132 [ 60.197496][ T6749] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.206654][ T132] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.211678][ T6749] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.223021][ T6749] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.228740][ T6749] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.234030][ T6749] ? ext4_ext_release+0x10/0x10 [ 60.238891][ T6749] ? down_write_killable+0x170/0x170 [ 60.244162][ T6749] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.249611][ T6749] ext4_map_blocks+0x4cb/0x1640 [ 60.254455][ T6749] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.259639][ T6749] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.265172][ T6749] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.271137][ T6749] ? prandom_u32_state+0xe/0x170 [ 60.276063][ T6749] ? __brelse+0x84/0xa0 [ 60.280205][ T6749] ? __ext4_new_inode+0x144/0x55e0 [ 60.285305][ T6749] ext4_getblk+0xad/0x520 [ 60.289639][ T6749] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.295347][ T6749] ? ext4_free_inode+0x1700/0x1700 [ 60.300445][ T6749] ext4_bread+0x7c/0x380 [ 60.304675][ T6749] ? ext4_getblk+0x520/0x520 [ 60.309252][ T6749] ? dquot_get_next_dqblk+0x180/0x180 [ 60.314617][ T6749] ext4_append+0x153/0x360 [ 60.319047][ T6749] ext4_mkdir+0x5e0/0xdf0 [ 60.323369][ T6749] ? ext4_rmdir+0xde0/0xde0 [ 60.327860][ T6749] ? security_inode_permission+0xc4/0xf0 [ 60.333633][ T6749] vfs_mkdir+0x419/0x690 [ 60.337873][ T6749] do_mkdirat+0x21e/0x280 [ 60.342225][ T6749] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.347068][ T6749] ? do_syscall_64+0x1c/0xe0 [ 60.351651][ T6749] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.357622][ T6749] do_syscall_64+0x60/0xe0 [ 60.362029][ T6749] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.367908][ T6749] RIP: 0033:0x7fa74d9e5687 [ 60.372304][ T6749] Code: Bad RIP value. [ 60.376352][ T6749] RSP: 002b:00007ffc6471a3b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.384766][ T6749] RAX: ffffffffffffffda RBX: 0000564a1c218985 RCX: 00007fa74d9e5687 [ 60.392738][ T6749] RDX: 00007ffc6471a280 RSI: 00000000000001ed RDI: 0000564a1c218985 [ 60.400709][ T6749] RBP: 00007fa74d9e5680 R08: 0000000000000100 R09: 0000000000000000 [ 60.408680][ T6749] R10: 0000564a1c218980 R11: 0000000000000246 R12: 00000000000001ed [ 60.416650][ T6749] R13: 00007ffc6471a540 R14: 0000000000000000 R15: 0000000000000000 [ 60.424628][ T132] CPU: 1 PID: 132 Comm: kworker/u4:3 Not tainted 5.8.0-rc1-syzkaller #0 [ 60.433054][ T132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.443126][ T132] Workqueue: writeback wb_workfn (flush-8:0) [ 60.449110][ T132] Call Trace: [ 60.452492][ T132] dump_stack+0x18f/0x20d [ 60.456840][ T132] check_preemption_disabled+0x20d/0x220 [ 60.462539][ T132] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.467663][ T132] ? ext4_find_extent+0x81a/0xad0 [ 60.472704][ T132] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.478180][ T132] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.483904][ T132] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.489178][ T132] ? ext4_ext_release+0x10/0x10 [ 60.494049][ T132] ? down_write_killable+0x170/0x170 [ 60.499327][ T132] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.504792][ T132] ext4_map_blocks+0x4cb/0x1640 [ 60.509651][ T132] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.514842][ T132] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.520387][ T132] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.526353][ T132] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 60.531793][ T132] ext4_writepages+0x1a7b/0x33c0 [ 60.536724][ T132] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.542336][ T132] ? __lock_acquire+0x2224/0x48b0 [ 60.547354][ T132] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.553314][ T132] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 60.559275][ T132] ? __ext4_mark_inode_dirty+0x940/0x940 [ 60.564891][ T132] ? do_writepages+0xfa/0x2a0 [ 60.569546][ T132] do_writepages+0xfa/0x2a0 [ 60.574031][ T132] ? page_writeback_cpu_online+0x10/0x10 [ 60.579645][ T132] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.585189][ T132] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.591146][ T132] ? lock_downgrade+0x840/0x840 [ 60.595979][ T132] __writeback_single_inode+0x12a/0x13d0 [ 60.601620][ T132] ? _raw_spin_unlock+0x24/0x40 [ 60.606454][ T132] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 60.612433][ T132] writeback_sb_inodes+0x515/0xdc0 [ 60.617533][ T132] ? __writeback_single_inode+0x13d0/0x13d0 [ 60.623417][ T132] __writeback_inodes_wb+0xc3/0x250 [ 60.628617][ T132] wb_writeback+0x8db/0xd50 [ 60.633202][ T132] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 60.639511][ T132] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 60.645385][ T132] ? cpumask_next+0x3c/0x40 [ 60.649888][ T132] ? get_nr_dirty_inodes+0xd6/0x130 [ 60.655069][ T132] wb_workfn+0xab3/0x1090 [ 60.659398][ T132] ? inode_wait_for_writeback+0x30/0x30 [ 60.665028][ T132] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.670565][ T132] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.676527][ T132] process_one_work+0x965/0x1690 [ 60.681449][ T132] ? lock_release+0x800/0x800 [ 60.686119][ T132] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.691486][ T132] ? rwlock_bug.part.0+0x90/0x90 [ 60.696406][ T132] worker_thread+0x96/0xe10 [ 60.700894][ T132] ? process_one_work+0x1690/0x1690 [ 60.706072][ T132] kthread+0x3b5/0x4a0 [ 60.711872][ T132] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.717569][ T132] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.723282][ T132] ret_from_fork+0x1f/0x30 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.171' (ECDSA) to the list of known hosts. 2020/06/16 13:32:50 fuzzer started 2020/06/16 13:32:50 connecting to host at 10.128.0.26:46651 2020/06/16 13:32:50 checking machine... 2020/06/16 13:32:50 checking revisions... 2020/06/16 13:32:50 testing simple program... syzkaller login: [ 65.254382][ T6819] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6819 [ 65.263619][ T6819] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.269515][ T6819] CPU: 0 PID: 6819 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 65.277762][ T6819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.287798][ T6819] Call Trace: [ 65.291075][ T6819] dump_stack+0x18f/0x20d [ 65.295405][ T6819] check_preemption_disabled+0x20d/0x220 [ 65.301017][ T6819] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.306114][ T6819] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.311551][ T6819] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.317269][ T6819] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.322568][ T6819] ? ext4_ext_release+0x10/0x10 [ 65.327430][ T6819] ? down_write_killable+0x170/0x170 [ 65.332711][ T6819] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.338152][ T6819] ext4_map_blocks+0x4cb/0x1640 [ 65.342983][ T6819] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.348160][ T6819] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.353695][ T6819] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.359683][ T6819] ? prandom_u32_state+0xe/0x170 [ 65.364601][ T6819] ? __brelse+0x84/0xa0 [ 65.368733][ T6819] ? __ext4_new_inode+0x144/0x55e0 [ 65.373828][ T6819] ext4_getblk+0xad/0x520 [ 65.378137][ T6819] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.383837][ T6819] ? ext4_free_inode+0x1700/0x1700 [ 65.388944][ T6819] ext4_bread+0x7c/0x380 [ 65.393162][ T6819] ? ext4_getblk+0x520/0x520 [ 65.397737][ T6819] ? dquot_get_next_dqblk+0x180/0x180 [ 65.403089][ T6819] ext4_append+0x153/0x360 [ 65.407496][ T6819] ext4_mkdir+0x5e0/0xdf0 [ 65.411806][ T6819] ? ext4_rmdir+0xde0/0xde0 [ 65.416287][ T6819] ? security_inode_permission+0xc4/0xf0 [ 65.421898][ T6819] vfs_mkdir+0x419/0x690 [ 65.426132][ T6819] do_mkdirat+0x21e/0x280 [ 65.430450][ T6819] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.435275][ T6819] ? do_syscall_64+0x1c/0xe0 [ 65.439842][ T6819] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.445989][ T6819] do_syscall_64+0x60/0xe0 [ 65.450403][ T6819] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.456269][ T6819] RIP: 0033:0x4b02a0 [ 65.460137][ T6819] Code: Bad RIP value. [ 65.464201][ T6819] RSP: 002b:000000c0000dd4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 65.472602][ T6819] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 65.480657][ T6819] RDX: 00000000000001c0 RSI: 000000c0002ee4e0 RDI: ffffffffffffff9c [ 65.488659][ T6819] RBP: 000000c0000dd510 R08: 0000000000000000 R09: 0000000000000000 [ 65.496616][ T6819] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 65.504603][ T6819] R13: 0000000000000028 R14: 0000000000000027 R15: 0000000000000100 [ 65.544369][ T6838] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6838 [ 65.554426][ T6838] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.560332][ T6838] CPU: 1 PID: 6838 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.568911][ T6838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.578969][ T6838] Call Trace: [ 65.582267][ T6838] dump_stack+0x18f/0x20d [ 65.586610][ T6838] check_preemption_disabled+0x20d/0x220 [ 65.592248][ T6838] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.597376][ T6838] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.602908][ T6838] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.608661][ T6838] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.613942][ T6838] ? ext4_ext_release+0x10/0x10 [ 65.618819][ T6838] ? down_write_killable+0x170/0x170 [ 65.624267][ T6838] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.629717][ T6838] ext4_map_blocks+0x4cb/0x1640 [ 65.634553][ T6838] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.639729][ T6838] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.645486][ T6838] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.651446][ T6838] ? prandom_u32_state+0xe/0x170 [ 65.657753][ T6838] ? __brelse+0x84/0xa0 [ 65.662006][ T6838] ? __ext4_new_inode+0x144/0x55e0 [ 65.667106][ T6838] ext4_getblk+0xad/0x520 [ 65.671497][ T6838] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.677205][ T6838] ? ext4_free_inode+0x1700/0x1700 [ 65.682298][ T6838] ext4_bread+0x7c/0x380 [ 65.686527][ T6838] ? ext4_getblk+0x520/0x520 [ 65.691108][ T6838] ? dquot_get_next_dqblk+0x180/0x180 [ 65.696463][ T6838] ext4_append+0x153/0x360 [ 65.700871][ T6838] ext4_mkdir+0x5e0/0xdf0 [ 65.705198][ T6838] ? ext4_rmdir+0xde0/0xde0 [ 65.709683][ T6838] ? security_inode_permission+0xc4/0xf0 [ 65.715301][ T6838] vfs_mkdir+0x419/0x690 [ 65.719534][ T6838] do_mkdirat+0x21e/0x280 [ 65.723845][ T6838] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.728682][ T6838] ? do_syscall_64+0x1c/0xe0 [ 65.733258][ T6838] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.739236][ T6838] do_syscall_64+0x60/0xe0 [ 65.743668][ T6838] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.749556][ T6838] RIP: 0033:0x45bed7 [ 65.753431][ T6838] Code: Bad RIP value. [ 65.757491][ T6838] RSP: 002b:00007fff236844f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 65.765887][ T6838] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 65.773856][ T6838] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007fff236846d0 [ 65.781814][ T6838] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003100 [ 65.789761][ T6838] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 65.797711][ T6838] R13: 00007fff236846d0 R14: 8421084210842109 R15: 00007fff236846dc [ 65.807979][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 65.817097][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.822995][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.831227][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.841292][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 65.847444][ T57] Call Trace: [ 65.850743][ T57] dump_stack+0x18f/0x20d [ 65.855089][ T57] check_preemption_disabled+0x20d/0x220 [ 65.860724][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 65.865845][ T57] ? ext4_find_extent+0x81a/0xad0 [ 65.870883][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 65.876353][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 65.882093][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 65.887396][ T57] ? ext4_ext_release+0x10/0x10 [ 65.892274][ T57] ? down_write_killable+0x170/0x170 [ 65.898000][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 65.903498][ T57] ext4_map_blocks+0x4cb/0x1640 [ 65.908451][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 65.913685][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.919237][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.925223][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 65.929504][ T6839] IPVS: ftp: loaded support on port[0] = 21 [ 65.930696][ T57] ext4_writepages+0x1a7b/0x33c0 [ 65.941525][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.947166][ T57] ? __lock_acquire+0x2224/0x48b0 [ 65.952218][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.958245][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.964240][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 65.969884][ T57] ? do_writepages+0xfa/0x2a0 [ 65.976837][ T57] do_writepages+0xfa/0x2a0 [ 65.981357][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 65.981772][ T6839] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6839 [ 65.986992][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.987009][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.987024][ T57] ? lock_downgrade+0x840/0x840 [ 65.987046][ T57] __writeback_single_inode+0x12a/0x13d0 [ 65.996417][ T6839] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.001917][ T57] ? _raw_spin_unlock+0x24/0x40 [ 66.029014][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 66.035001][ T57] writeback_sb_inodes+0x515/0xdc0 [ 66.040127][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 66.046040][ T57] __writeback_inodes_wb+0xc3/0x250 [ 66.051247][ T57] wb_writeback+0x8db/0xd50 [ 66.055776][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 66.062100][ T57] ? cpumask_next+0x3c/0x40 [ 66.066598][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 66.071804][ T57] wb_workfn+0x9bc/0x1090 [ 66.076136][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 66.081673][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.087222][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.093195][ T57] process_one_work+0x965/0x1690 [ 66.098127][ T57] ? lock_release+0x800/0x800 [ 66.102797][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.108168][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 66.113099][ T57] worker_thread+0x96/0xe10 [ 66.117602][ T57] ? process_one_work+0x1690/0x1690 [ 66.122786][ T57] kthread+0x3b5/0x4a0 [ 66.126840][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.132551][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.138265][ T57] ret_from_fork+0x1f/0x30 [ 66.142689][ T6839] CPU: 1 PID: 6839 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.151280][ T6839] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.154757][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 66.161328][ T6839] Call Trace: [ 66.161350][ T6839] dump_stack+0x18f/0x20d [ 66.161375][ T6839] check_preemption_disabled+0x20d/0x220 [ 66.170631][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.173779][ T6839] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.173809][ T6839] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.173825][ T6839] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.173848][ T6839] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.173875][ T6839] ? ext4_ext_release+0x10/0x10 [ 66.215974][ T6839] ? down_write_killable+0x170/0x170 [ 66.221331][ T6839] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.226790][ T6839] ext4_map_blocks+0x4cb/0x1640 [ 66.231660][ T6839] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.236862][ T6839] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.242409][ T6839] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.248388][ T6839] ? prandom_u32_state+0xe/0x170 [ 66.253329][ T6839] ? __brelse+0x84/0xa0 [ 66.257538][ T6839] ? __ext4_new_inode+0x144/0x55e0 [ 66.262666][ T6839] ext4_getblk+0xad/0x520 [ 66.266999][ T6839] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.272748][ T6839] ? ext4_free_inode+0x1700/0x1700 [ 66.277866][ T6839] ext4_bread+0x7c/0x380 [ 66.282153][ T6839] ? ext4_getblk+0x520/0x520 [ 66.286729][ T6839] ? dquot_get_next_dqblk+0x180/0x180 [ 66.292090][ T6839] ext4_append+0x153/0x360 [ 66.296504][ T6839] ext4_mkdir+0x5e0/0xdf0 [ 66.300825][ T6839] ? ext4_rmdir+0xde0/0xde0 [ 66.305318][ T6839] ? security_inode_permission+0xc4/0xf0 [ 66.310938][ T6839] vfs_mkdir+0x419/0x690 [ 66.315171][ T6839] do_mkdirat+0x21e/0x280 [ 66.319487][ T6839] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.324447][ T6839] ? do_syscall_64+0x1c/0xe0 [ 66.329028][ T6839] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.335000][ T6839] do_syscall_64+0x60/0xe0 [ 66.339407][ T6839] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.345282][ T6839] RIP: 0033:0x45bed7 [ 66.349151][ T6839] Code: Bad RIP value. [ 66.353202][ T6839] RSP: 002b:00007fff236843e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 66.361610][ T6839] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 66.369568][ T6839] RDX: 00007fff23684433 RSI: 00000000000001ff RDI: 00007fff23684430 [ 66.377520][ T6839] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 66.385473][ T6839] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 66.393428][ T6839] R13: 00007fff23684420 R14: 0000000000000000 R15: 00007fff23684430 [ 66.401407][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.409661][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.419730][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 66.425710][ T57] Call Trace: [ 66.429006][ T57] dump_stack+0x18f/0x20d [ 66.433363][ T57] check_preemption_disabled+0x20d/0x220 [ 66.439013][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.444141][ T57] ? ext4_find_extent+0x81a/0xad0 [ 66.449183][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.454649][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.460385][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.465691][ T57] ? ext4_ext_release+0x10/0x10 [ 66.470581][ T57] ? down_write_killable+0x170/0x170 [ 66.475874][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.481358][ T57] ext4_map_blocks+0x4cb/0x1640 [ 66.486224][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.491450][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.497008][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.502997][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 66.507796][ T6839] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6839 [ 66.508461][ T57] ext4_writepages+0x1a7b/0x33c0 [ 66.517845][ T6839] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.523694][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.523712][ T57] ? __lock_acquire+0x2224/0x48b0 [ 66.523750][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 66.546217][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 66.552188][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 66.557805][ T57] ? do_writepages+0xfa/0x2a0 [ 66.562468][ T57] do_writepages+0xfa/0x2a0 [ 66.566963][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 66.572587][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.578117][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.584080][ T57] ? lock_downgrade+0x840/0x840 [ 66.588922][ T57] __writeback_single_inode+0x12a/0x13d0 [ 66.594541][ T57] ? _raw_spin_unlock+0x24/0x40 [ 66.599378][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 66.605347][ T57] writeback_sb_inodes+0x515/0xdc0 [ 66.610457][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 66.616355][ T57] __writeback_inodes_wb+0xc3/0x250 [ 66.621544][ T57] wb_writeback+0x8db/0xd50 [ 66.626080][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 66.632398][ T57] ? cpumask_next+0x3c/0x40 [ 66.636888][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 66.642076][ T57] wb_workfn+0x9bc/0x1090 [ 66.646829][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 66.652369][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.657900][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.663870][ T57] process_one_work+0x965/0x1690 [ 66.668801][ T57] ? lock_release+0x800/0x800 [ 66.673464][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.678822][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 66.683765][ T57] worker_thread+0x96/0xe10 [ 66.688262][ T57] ? process_one_work+0x1690/0x1690 [ 66.693444][ T57] kthread+0x3b5/0x4a0 [ 66.697497][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.703198][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.708904][ T57] ret_from_fork+0x1f/0x30 [ 66.713332][ T6839] CPU: 1 PID: 6839 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.717718][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 66.722115][ T6839] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.731595][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.741134][ T6839] Call Trace: [ 66.741154][ T6839] dump_stack+0x18f/0x20d [ 66.741177][ T6839] check_preemption_disabled+0x20d/0x220 [ 66.741198][ T6839] ext4_mb_new_blocks+0xa4d/0x3b70 [ 66.766447][ T6839] ? ext4_ext_search_right+0x2ca/0xb20 [ 66.771908][ T6839] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 66.777616][ T6839] ext4_ext_map_blocks+0x201b/0x33e0 [ 66.782894][ T6839] ? ext4_ext_release+0x10/0x10 [ 66.787742][ T6839] ? down_write_killable+0x170/0x170 [ 66.793470][ T6839] ? ext4_es_lookup_extent+0x41d/0xd10 [ 66.798928][ T6839] ext4_map_blocks+0x4cb/0x1640 [ 66.803768][ T6839] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 66.808948][ T6839] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.814477][ T6839] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.820972][ T6839] ? prandom_u32_state+0xe/0x170 [ 66.825895][ T6839] ? __brelse+0x84/0xa0 [ 66.830033][ T6839] ? __ext4_new_inode+0x144/0x55e0 [ 66.835132][ T6839] ext4_getblk+0xad/0x520 [ 66.839446][ T6839] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 66.845164][ T6839] ? ext4_free_inode+0x1700/0x1700 [ 66.850271][ T6839] ext4_bread+0x7c/0x380 [ 66.854497][ T6839] ? ext4_getblk+0x520/0x520 [ 66.859070][ T6839] ? dquot_get_next_dqblk+0x180/0x180 [ 66.864432][ T6839] ext4_append+0x153/0x360 [ 66.868839][ T6839] ext4_mkdir+0x5e0/0xdf0 [ 66.873169][ T6839] ? ext4_rmdir+0xde0/0xde0 [ 66.877667][ T6839] ? security_inode_permission+0xc4/0xf0 [ 66.883288][ T6839] vfs_mkdir+0x419/0x690 [ 66.887517][ T6839] do_mkdirat+0x21e/0x280 [ 66.891835][ T6839] ? __ia32_sys_mknod+0xb0/0xb0 [ 66.896671][ T6839] ? do_syscall_64+0x1c/0xe0 [ 66.901244][ T6839] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 66.907210][ T6839] do_syscall_64+0x60/0xe0 [ 66.911973][ T6839] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.917869][ T6839] RIP: 0033:0x45bed7 [ 66.921739][ T6839] Code: Bad RIP value. [ 66.925795][ T6839] RSP: 002b:00007fff236843e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 66.934188][ T6839] RAX: ffffffffffffffda RBX: 00000000000103ba RCX: 000000000045bed7 [ 66.942143][ T6839] RDX: 00007fff23684433 RSI: 00000000000001ff RDI: 00007fff23684430 [ 66.950096][ T6839] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 66.958055][ T6839] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 66.966008][ T6839] R13: 00007fff23684420 R14: 00000000000103ac R15: 00007fff23684430 [ 66.973996][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 66.982235][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.992311][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 66.998295][ T57] Call Trace: [ 67.001595][ T57] dump_stack+0x18f/0x20d [ 67.005938][ T57] check_preemption_disabled+0x20d/0x220 [ 67.011663][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 67.016783][ T57] ? ext4_find_extent+0x81a/0xad0 [ 67.021824][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 67.027289][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 67.033025][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 67.038426][ T57] ? ext4_ext_release+0x10/0x10 [ 67.043307][ T57] ? down_write_killable+0x170/0x170 [ 67.048692][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 67.054165][ T57] ext4_map_blocks+0x4cb/0x1640 [ 67.059035][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 67.064243][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.069791][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.076210][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 67.081679][ T57] ext4_writepages+0x1a7b/0x33c0 [ 67.086653][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.092281][ T57] ? __lock_acquire+0x2224/0x48b0 [ 67.097330][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.103303][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.109360][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.114974][ T57] ? do_writepages+0xfa/0x2a0 [ 67.119632][ T57] do_writepages+0xfa/0x2a0 [ 67.124124][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 67.130829][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.136358][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.142326][ T57] ? lock_downgrade+0x840/0x840 [ 67.147165][ T57] __writeback_single_inode+0x12a/0x13d0 [ 67.153045][ T57] ? _raw_spin_unlock+0x24/0x40 [ 67.157880][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 67.163845][ T57] writeback_sb_inodes+0x515/0xdc0 [ 67.169300][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 67.175213][ T57] __writeback_inodes_wb+0xc3/0x250 [ 67.180400][ T57] wb_writeback+0x8db/0xd50 [ 67.184993][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 67.191331][ T57] ? cpumask_next+0x3c/0x40 [ 67.195820][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 67.201005][ T57] wb_workfn+0x9bc/0x1090 [ 67.205326][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 67.210859][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.216386][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.222353][ T57] process_one_work+0x965/0x1690 [ 67.227287][ T57] ? lock_release+0x800/0x800 [ 67.231954][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.237314][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 67.242239][ T57] worker_thread+0x96/0xe10 [ 67.246819][ T57] ? process_one_work+0x1690/0x1690 [ 67.252096][ T57] kthread+0x3b5/0x4a0 [ 67.256146][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.261843][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.267551][ T57] ret_from_fork+0x1f/0x30 [ 67.278248][ T57] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:2/57 [ 67.287598][ T57] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 67.293566][ T57] CPU: 0 PID: 57 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 67.301798][ T57] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.311867][ T57] Workqueue: writeback wb_workfn (flush-8:0) [ 67.317846][ T57] Call Trace: [ 67.321147][ T57] dump_stack+0x18f/0x20d [ 67.325492][ T57] check_preemption_disabled+0x20d/0x220 [ 67.331134][ T57] ext4_mb_new_blocks+0xa4d/0x3b70 [ 67.336346][ T57] ? ext4_find_extent+0x81a/0xad0 [ 67.341383][ T57] ? ext4_ext_search_right+0x2ca/0xb20 [ 67.346844][ T57] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 67.352577][ T57] ext4_ext_map_blocks+0x201b/0x33e0 [ 67.357877][ T57] ? ext4_ext_release+0x10/0x10 2020/06/16 13:32:53 building call list... [ 67.362756][ T57] ? down_write_killable+0x170/0x170 [ 67.368129][ T57] ? ext4_es_lookup_extent+0x41d/0xd10 [ 67.373617][ T57] ext4_map_blocks+0x4cb/0x1640 [ 67.378477][ T57] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 67.383702][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.389248][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.395230][ T57] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 67.400782][ T57] ext4_writepages+0x1a7b/0x33c0 [ 67.405759][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.411395][ T57] ? __lock_acquire+0x2224/0x48b0 [ 67.416459][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.422455][ T57] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 67.428449][ T57] ? __ext4_mark_inode_dirty+0x940/0x940 [ 67.434081][ T57] ? do_writepages+0xfa/0x2a0 [ 67.438754][ T57] do_writepages+0xfa/0x2a0 [ 67.443273][ T57] ? page_writeback_cpu_online+0x10/0x10 [ 67.448920][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.454492][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.460474][ T57] ? lock_downgrade+0x840/0x840 [ 67.465342][ T57] __writeback_single_inode+0x12a/0x13d0 [ 67.470999][ T57] ? _raw_spin_unlock+0x24/0x40 [ 67.475859][ T57] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 67.481977][ T57] writeback_sb_inodes+0x515/0xdc0 [ 67.487220][ T57] ? __writeback_single_inode+0x13d0/0x13d0 [ 67.493167][ T57] __writeback_inodes_wb+0xc3/0x250 [ 67.498398][ T57] wb_writeback+0x8db/0xd50 [ 67.503269][ T57] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 67.509606][ T57] ? cpumask_next+0x3c/0x40 [ 67.514115][ T57] ? get_nr_dirty_inodes+0xd6/0x130 [ 67.519326][ T57] wb_workfn+0x9bc/0x1090 [ 67.523667][ T57] ? inode_wait_for_writeback+0x30/0x30 [ 67.529220][ T57] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.534764][ T57] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 67.540757][ T57] process_one_work+0x965/0x1690 [ 67.545704][ T57] ? lock_release+0x800/0x800 [ 67.550387][ T57] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.555770][ T57] ? rwlock_bug.part.0+0x90/0x90 [ 67.560714][ T57] worker_thread+0x96/0xe10 [ 67.565229][ T57] ? process_one_work+0x1690/0x1690 [ 67.570426][ T57] kthread+0x3b5/0x4a0 [ 67.574501][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.580214][ T57] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 67.585953][ T57] ret_from_fork+0x1f/0x30 [ 67.843156][ T272] tipc: TX() has been purged, node left! executing program [ 68.345520][ T272] ================================================================== [ 68.353764][ T272] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 68.361742][ T272] Write of size 1 at addr ffff8880a69f79e4 by task kworker/u4:6/272 [ 68.369702][ T272] [ 68.372032][ T272] CPU: 1 PID: 272 Comm: kworker/u4:6 Not tainted 5.8.0-rc1-syzkaller #0 [ 68.380348][ T272] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.390405][ T272] Workqueue: netns cleanup_net [ 68.395169][ T272] Call Trace: [ 68.398460][ T272] dump_stack+0x18f/0x20d [ 68.402796][ T272] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.408512][ T272] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.414052][ T272] ? afs_put_call+0xa40/0xa40 [ 68.418730][ T272] print_address_description.constprop.0.cold+0xd3/0x413 [ 68.425782][ T272] ? vprintk_func+0x97/0x1a6 [ 68.430380][ T272] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.435925][ T272] kasan_report.cold+0x1f/0x37 [ 68.440782][ T272] ? rcu_read_lock_held_common+0x51/0xa0 [ 68.446418][ T272] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.451967][ T272] afs_wake_up_async_call+0x6aa/0x770 [ 68.457335][ T272] ? afs_close_socket+0x320/0x320 [ 68.462373][ T272] ? afs_put_call+0xa40/0xa40 [ 68.467058][ T272] rxrpc_notify_socket+0x1db/0x5d0 [ 68.472186][ T272] ? afs_put_call+0xa40/0xa40 [ 68.476877][ T272] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 68.483316][ T272] rxrpc_call_completed+0xca/0xf0 [ 68.488378][ T272] rxrpc_discard_prealloc+0x781/0xab0 [ 68.493779][ T272] ? lock_sock_nested+0x94/0x110 [ 68.498745][ T272] rxrpc_listen+0x147/0x360 [ 68.503380][ T272] afs_close_socket+0x95/0x320 [ 68.508176][ T272] ? afs_purge_servers+0x16d/0x300 [ 68.513292][ T272] ? afs_rx_discard_new_call+0x50/0x50 [ 68.518759][ T272] ? init_wait_var_entry+0x200/0x200 [ 68.524052][ T272] ? rcu_read_lock_held_common+0xa0/0xa0 [ 68.529775][ T272] ? check_preemption_disabled+0x38/0x220 [ 68.535502][ T272] afs_net_exit+0x1bc/0x310 [ 68.540004][ T272] ? afs_net_init+0xe30/0xe30 [ 68.544679][ T272] ops_exit_list.isra.0+0xa8/0x150 [ 68.549793][ T272] cleanup_net+0x511/0xa50 [ 68.554404][ T272] ? unregister_pernet_device+0x70/0x70 [ 68.559963][ T272] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 68.565957][ T272] process_one_work+0x965/0x1690 [ 68.570895][ T272] ? lock_release+0x800/0x800 [ 68.575558][ T272] ? pwq_dec_nr_in_flight+0x310/0x310 [ 68.580926][ T272] ? rwlock_bug.part.0+0x90/0x90 [ 68.585873][ T272] worker_thread+0x96/0xe10 [ 68.590393][ T272] ? process_one_work+0x1690/0x1690 [ 68.595595][ T272] kthread+0x3b5/0x4a0 [ 68.599675][ T272] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.605394][ T272] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 68.611118][ T272] ret_from_fork+0x1f/0x30 [ 68.615543][ T272] [ 68.617868][ T272] Allocated by task 6839: [ 68.622203][ T272] save_stack+0x1b/0x40 [ 68.626362][ T272] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 68.631992][ T272] kmem_cache_alloc_trace+0x153/0x7d0 [ 68.637357][ T272] afs_alloc_call+0x55/0x630 [ 68.641944][ T272] afs_charge_preallocation+0xe9/0x2d0 [ 68.647408][ T272] afs_open_socket+0x292/0x360 [ 68.652168][ T272] afs_net_init+0xa6c/0xe30 [ 68.656683][ T272] ops_init+0xaf/0x420 [ 68.660745][ T272] setup_net+0x2de/0x860 [ 68.664985][ T272] copy_net_ns+0x293/0x590 [ 68.669399][ T272] create_new_namespaces+0x3fb/0xb30 [ 68.674681][ T272] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 68.680482][ T272] ksys_unshare+0x43d/0x8e0 [ 68.684982][ T272] __x64_sys_unshare+0x2d/0x40 [ 68.689742][ T272] do_syscall_64+0x60/0xe0 [ 68.694156][ T272] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 68.700474][ T272] [ 68.702794][ T272] Freed by task 272: [ 68.706687][ T272] save_stack+0x1b/0x40 [ 68.710839][ T272] __kasan_slab_free+0xf7/0x140 [ 68.715687][ T272] kfree+0x109/0x2b0 [ 68.719579][ T272] afs_put_call+0x585/0xa40 [ 68.724080][ T272] rxrpc_discard_prealloc+0x764/0xab0 [ 68.729447][ T272] rxrpc_listen+0x147/0x360 [ 68.733948][ T272] afs_close_socket+0x95/0x320 [ 68.738707][ T272] afs_net_exit+0x1bc/0x310 [ 68.743210][ T272] ops_exit_list.isra.0+0xa8/0x150 [ 68.748316][ T272] cleanup_net+0x511/0xa50 [ 68.752731][ T272] process_one_work+0x965/0x1690 [ 68.757666][ T272] worker_thread+0x96/0xe10 [ 68.762696][ T272] kthread+0x3b5/0x4a0 [ 68.766761][ T272] ret_from_fork+0x1f/0x30 [ 68.771164][ T272] [ 68.773495][ T272] The buggy address belongs to the object at ffff8880a69f7800 [ 68.773495][ T272] which belongs to the cache kmalloc-1k of size 1024 [ 68.787542][ T272] The buggy address is located 484 bytes inside of [ 68.787542][ T272] 1024-byte region [ffff8880a69f7800, ffff8880a69f7c00) [ 68.801410][ T272] The buggy address belongs to the page: [ 68.807040][ T272] page:ffffea00029a7dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 68.816141][ T272] flags: 0xfffe0000000200(slab) [ 68.820995][ T272] raw: 00fffe0000000200 ffffea00027b6708 ffffea000286cd88 ffff8880aa000c40 [ 68.829582][ T272] raw: 0000000000000000 ffff8880a69f7000 0000000100000002 0000000000000000 [ 68.838177][ T272] page dumped because: kasan: bad access detected [ 68.844591][ T272] [ 68.846911][ T272] Memory state around the buggy address: [ 68.852536][ T272] ffff8880a69f7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.860593][ T272] ffff8880a69f7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.868651][ T272] >ffff8880a69f7980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.876702][ T272] ^ [ 68.883891][ T272] ffff8880a69f7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.891950][ T272] ffff8880a69f7a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.900001][ T272] ================================================================== [ 68.908052][ T272] Disabling lock debugging due to kernel taint [ 68.914242][ T272] Kernel panic - not syncing: panic_on_warn set ... [ 68.920909][ T272] CPU: 1 PID: 272 Comm: kworker/u4:6 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 68.930619][ T272] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.940667][ T272] Workqueue: netns cleanup_net [ 68.945415][ T272] Call Trace: [ 68.948956][ T272] dump_stack+0x18f/0x20d [ 68.953279][ T272] ? afs_wake_up_async_call+0x670/0x770 [ 68.958812][ T272] ? afs_put_call+0xa40/0xa40 [ 68.963476][ T272] panic+0x2e3/0x75c [ 68.967364][ T272] ? __warn_printk+0xf3/0xf3 [ 68.971949][ T272] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 68.978103][ T272] ? trace_hardirqs_on+0x55/0x220 [ 68.983118][ T272] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.990299][ T272] ? afs_wake_up_async_call+0x6aa/0x770 [ 68.995855][ T272] ? afs_put_call+0xa40/0xa40 [ 69.000527][ T272] end_report+0x4d/0x53 [ 69.004674][ T272] kasan_report.cold+0xd/0x37 [ 69.009346][ T272] ? rcu_read_lock_held_common+0x51/0xa0 [ 69.014977][ T272] ? afs_wake_up_async_call+0x6aa/0x770 [ 69.020520][ T272] afs_wake_up_async_call+0x6aa/0x770 [ 69.025886][ T272] ? afs_close_socket+0x320/0x320 [ 69.030900][ T272] ? afs_put_call+0xa40/0xa40 [ 69.035577][ T272] rxrpc_notify_socket+0x1db/0x5d0 [ 69.040696][ T272] ? afs_put_call+0xa40/0xa40 [ 69.045368][ T272] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 69.051774][ T272] rxrpc_call_completed+0xca/0xf0 [ 69.056799][ T272] rxrpc_discard_prealloc+0x781/0xab0 [ 69.062162][ T272] ? lock_sock_nested+0x94/0x110 [ 69.067093][ T272] rxrpc_listen+0x147/0x360 [ 69.071595][ T272] afs_close_socket+0x95/0x320 [ 69.076352][ T272] ? afs_purge_servers+0x16d/0x300 [ 69.081453][ T272] ? afs_rx_discard_new_call+0x50/0x50 [ 69.086902][ T272] ? init_wait_var_entry+0x200/0x200 [ 69.092180][ T272] ? rcu_read_lock_held_common+0xa0/0xa0 [ 69.098238][ T272] ? check_preemption_disabled+0x38/0x220 [ 69.103947][ T272] afs_net_exit+0x1bc/0x310 [ 69.108442][ T272] ? afs_net_init+0xe30/0xe30 [ 69.113109][ T272] ops_exit_list.isra.0+0xa8/0x150 [ 69.118236][ T272] cleanup_net+0x511/0xa50 [ 69.122646][ T272] ? unregister_pernet_device+0x70/0x70 [ 69.128198][ T272] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 69.134178][ T272] process_one_work+0x965/0x1690 [ 69.139117][ T272] ? lock_release+0x800/0x800 [ 69.143791][ T272] ? pwq_dec_nr_in_flight+0x310/0x310 [ 69.149156][ T272] ? rwlock_bug.part.0+0x90/0x90 [ 69.154092][ T272] worker_thread+0x96/0xe10 [ 69.158596][ T272] ? process_one_work+0x1690/0x1690 [ 69.163789][ T272] kthread+0x3b5/0x4a0 [ 69.167854][ T272] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.173570][ T272] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 69.179288][ T272] ret_from_fork+0x1f/0x30 [ 69.185135][ T272] Kernel Offset: disabled [ 69.189473][ T272] Rebooting in 86400 seconds..