[ 54.341360][ T6730] ext4_mb_new_blocks+0xa4d/0x3b70 [ 54.346463][ T6730] ? ext4_ext_search_right+0x2ca/0xb20 [ 54.351919][ T6730] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 54.357744][ T6730] ext4_ext_map_blocks+0x201b/0x33e0 [ 54.363031][ T6730] ? ext4_ext_release+0x10/0x10 [ 54.367883][ T6730] ? down_write_killable+0x170/0x170 [ 54.373150][ T6730] ? ext4_es_lookup_extent+0x41d/0xd10 [ 54.378607][ T6730] ext4_map_blocks+0x4cb/0x1640 [ 54.383441][ T6730] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 54.388642][ T6730] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 54.394185][ T6730] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 54.400171][ T6730] ? prandom_u32_state+0xe/0x170 [ 54.405138][ T6730] ? __brelse+0x84/0xa0 [ 54.409300][ T6730] ? __ext4_new_inode+0x144/0x55e0 [ 54.414413][ T6730] ext4_getblk+0xad/0x520 [ 54.418729][ T6730] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 54.424432][ T6730] ? ext4_free_inode+0x1700/0x1700 [ 54.429522][ T6730] ext4_bread+0x7c/0x380 [ 54.433746][ T6730] ? ext4_getblk+0x520/0x520 [ 54.438315][ T6730] ? dquot_get_next_dqblk+0x180/0x180 [ 54.443732][ T6730] ext4_append+0x153/0x360 [ 54.448187][ T6730] ext4_mkdir+0x5e0/0xdf0 [ 54.452522][ T6730] ? ext4_rmdir+0xde0/0xde0 [ 54.457026][ T6730] ? security_inode_permission+0xc4/0xf0 [ 54.462641][ T6730] vfs_mkdir+0x419/0x690 [ 54.466884][ T6730] do_mkdirat+0x21e/0x280 [ 54.471224][ T6730] ? __ia32_sys_mknod+0xb0/0xb0 [ 54.476077][ T6730] ? do_syscall_64+0x1c/0xe0 [ 54.480662][ T6730] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.486639][ T6730] do_syscall_64+0x60/0xe0 [ 54.491136][ T6730] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.497005][ T6730] RIP: 0033:0x7ffa474d6687 [ 54.501495][ T6730] Code: Bad RIP value. [ 54.505624][ T6730] RSP: 002b:00007fff4bd01348 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 54.514025][ T6730] RAX: ffffffffffffffda RBX: 00005559bab58985 RCX: 00007ffa474d6687 [ 54.521990][ T6730] RDX: 00007fff4bd01210 RSI: 00000000000001ed RDI: 00005559bab58985 [ 54.530060][ T6730] RBP: 00007ffa474d6680 R08: 0000000000000100 R09: 0000000000000000 [ 54.538226][ T6730] R10: 00005559bab58980 R11: 0000000000000246 R12: 00000000000001ed [ 54.546274][ T6730] R13: 00007fff4bd014d0 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 57.083554][ T451] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:4/451 [ 57.093305][ T451] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.099365][ T451] CPU: 1 PID: 451 Comm: kworker/u4:4 Not tainted 5.7.0-next-20200610-syzkaller #0 [ 57.108571][ T451] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.118636][ T451] Workqueue: writeback wb_workfn (flush-8:0) [ 57.124608][ T451] Call Trace: [ 57.127880][ T451] dump_stack+0x18f/0x20d [ 57.132199][ T451] check_preemption_disabled+0x20d/0x220 [ 57.137813][ T451] ext4_mb_new_blocks+0xa4d/0x3b70 [ 57.143334][ T451] ? ext4_find_extent+0x81a/0xad0 [ 57.148434][ T451] ? ext4_ext_search_right+0x2ca/0xb20 [ 57.154475][ T451] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 57.160183][ T451] ext4_ext_map_blocks+0x201b/0x33e0 [ 57.165470][ T451] ? ext4_ext_release+0x10/0x10 [ 57.170328][ T451] ? down_write_killable+0x170/0x170 [ 57.175623][ T451] ? ext4_es_lookup_extent+0x41d/0xd10 [ 57.181091][ T451] ext4_map_blocks+0x4cb/0x1640 [ 57.185940][ T451] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 57.191139][ T451] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.196667][ T451] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.202643][ T451] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 57.208105][ T451] ext4_writepages+0x1a83/0x33c0 [ 57.213051][ T451] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.218662][ T451] ? __lock_acquire+0x2224/0x48b0 [ 57.223689][ T451] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.229713][ T451] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 57.235673][ T451] ? __ext4_mark_inode_dirty+0x940/0x940 [ 57.241330][ T451] ? do_writepages+0xf3/0x2a0 [ 57.246014][ T451] do_writepages+0xf3/0x2a0 [ 57.250500][ T451] ? page_writeback_cpu_online+0x10/0x10 [ 57.256115][ T451] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.261866][ T451] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.267830][ T451] ? lock_downgrade+0x840/0x840 [ 57.272682][ T451] __writeback_single_inode+0x12a/0x13d0 [ 57.278304][ T451] ? _raw_spin_unlock+0x24/0x40 [ 57.283132][ T451] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 57.289104][ T451] writeback_sb_inodes+0x515/0xdc0 [ 57.294225][ T451] ? __writeback_single_inode+0x13d0/0x13d0 [ 57.300116][ T451] __writeback_inodes_wb+0xc3/0x250 [ 57.305298][ T451] wb_writeback+0x8c8/0xd40 [ 57.309786][ T451] ? writeback_inodes_wb.constprop.0+0x190/0x190 [ 57.316096][ T451] ? cpumask_next+0x3c/0x40 [ 57.320719][ T451] ? get_nr_dirty_inodes+0xd6/0x130 [ 57.327044][ T451] wb_workfn+0xab3/0x1090 [ 57.331366][ T451] ? inode_wait_for_writeback+0x30/0x30 [ 57.336900][ T451] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 57.342424][ T451] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 57.348402][ T451] process_one_work+0x965/0x1690 [ 57.353325][ T451] ? lock_release+0x800/0x800 [ 57.358053][ T451] ? pwq_dec_nr_in_flight+0x310/0x310 [ 57.363450][ T451] ? rwlock_bug.part.0+0x90/0x90 [ 57.368508][ T451] worker_thread+0x96/0xe10 [ 57.373002][ T451] ? process_one_work+0x1690/0x1690 [ 57.378211][ T451] kthread+0x3b5/0x4a0 [ 57.382297][ T451] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.389178][ T451] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 57.394882][ T451] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.100' (ECDSA) to the list of known hosts. 2020/06/10 10:08:50 fuzzer started 2020/06/10 10:08:50 connecting to host at 10.128.0.26:37533 2020/06/10 10:08:50 checking machine... 2020/06/10 10:08:50 checking revisions... 2020/06/10 10:08:50 testing simple program... [ 60.283033][ T6804] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6804 [ 60.292133][ T6804] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.298020][ T6804] CPU: 0 PID: 6804 Comm: syz-fuzzer Not tainted 5.7.0-next-20200610-syzkaller #0 [ 60.307110][ T6804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.317143][ T6804] Call Trace: [ 60.320439][ T6804] dump_stack+0x18f/0x20d [ 60.324764][ T6804] check_preemption_disabled+0x20d/0x220 [ 60.330808][ T6804] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.335917][ T6804] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.341480][ T6804] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.347202][ T6804] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.352479][ T6804] ? ext4_ext_release+0x10/0x10 [ 60.360363][ T6804] ? down_write_killable+0x170/0x170 [ 60.365636][ T6804] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.371091][ T6804] ext4_map_blocks+0x4cb/0x1640 [ 60.375958][ T6804] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.381146][ T6804] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.386940][ T6804] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.392937][ T6804] ? prandom_u32_state+0xe/0x170 [ 60.397877][ T6804] ? __brelse+0x84/0xa0 [ 60.402033][ T6804] ? __ext4_new_inode+0x144/0x55e0 [ 60.407124][ T6804] ext4_getblk+0xad/0x520 [ 60.411452][ T6804] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.417781][ T6804] ? ext4_free_inode+0x1700/0x1700 [ 60.422870][ T6804] ext4_bread+0x7c/0x380 [ 60.427103][ T6804] ? ext4_getblk+0x520/0x520 [ 60.431676][ T6804] ? dquot_get_next_dqblk+0x180/0x180 [ 60.437118][ T6804] ext4_append+0x153/0x360 [ 60.441531][ T6804] ext4_mkdir+0x5e0/0xdf0 [ 60.445867][ T6804] ? ext4_rmdir+0xde0/0xde0 [ 60.450470][ T6804] ? security_inode_permission+0xc4/0xf0 [ 60.456110][ T6804] vfs_mkdir+0x419/0x690 [ 60.460339][ T6804] do_mkdirat+0x21e/0x280 [ 60.464669][ T6804] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.469505][ T6804] ? do_syscall_64+0x1c/0xe0 [ 60.474096][ T6804] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.480078][ T6804] do_syscall_64+0x60/0xe0 [ 60.484591][ T6804] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.490488][ T6804] RIP: 0033:0x4b02a0 [ 60.494991][ T6804] Code: Bad RIP value. [ 60.499047][ T6804] RSP: 002b:000000c0000e74b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 60.507459][ T6804] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 60.515425][ T6804] RDX: 00000000000001c0 RSI: 000000c0000ea800 RDI: ffffffffffffff9c [ 60.523392][ T6804] RBP: 000000c0000e7510 R08: 0000000000000000 R09: 0000000000000000 [ 60.531343][ T6804] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 60.539295][ T6804] R13: 0000000000000041 R14: 0000000000000040 R15: 0000000000000100 [ 60.564961][ T6816] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6816 [ 60.574588][ T6816] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.580485][ T6816] CPU: 0 PID: 6816 Comm: syz-executor.0 Not tainted 5.7.0-next-20200610-syzkaller #0 [ 60.589941][ T6816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.600037][ T6816] Call Trace: [ 60.603364][ T6816] dump_stack+0x18f/0x20d [ 60.607677][ T6816] check_preemption_disabled+0x20d/0x220 [ 60.613324][ T6816] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.618420][ T6816] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.625697][ T6816] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.631669][ T6816] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.637904][ T6816] ? ext4_ext_release+0x10/0x10 [ 60.642750][ T6816] ? down_write_killable+0x170/0x170 [ 60.648453][ T6816] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.654136][ T6816] ext4_map_blocks+0x4cb/0x1640 [ 60.659156][ T6816] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.664475][ T6816] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.670028][ T6816] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.676020][ T6816] ? prandom_u32_state+0xe/0x170 [ 60.680944][ T6816] ? __brelse+0x84/0xa0 [ 60.685097][ T6816] ? __ext4_new_inode+0x144/0x55e0 [ 60.690819][ T6816] ext4_getblk+0xad/0x520 [ 60.695157][ T6816] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.700867][ T6816] ? ext4_free_inode+0x1700/0x1700 [ 60.706509][ T6816] ext4_bread+0x7c/0x380 [ 60.710767][ T6816] ? ext4_getblk+0x520/0x520 [ 60.715349][ T6816] ? dquot_get_next_dqblk+0x180/0x180 [ 60.720705][ T6816] ext4_append+0x153/0x360 [ 60.725103][ T6816] ext4_mkdir+0x5e0/0xdf0 [ 60.729432][ T6816] ? ext4_rmdir+0xde0/0xde0 [ 60.734046][ T6816] ? security_inode_permission+0xc4/0xf0 [ 60.739816][ T6816] vfs_mkdir+0x419/0x690 [ 60.744065][ T6816] do_mkdirat+0x21e/0x280 [ 60.748404][ T6816] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.753257][ T6816] ? do_syscall_64+0x1c/0xe0 [ 60.757830][ T6816] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.763812][ T6816] do_syscall_64+0x60/0xe0 [ 60.768305][ T6816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.774186][ T6816] RIP: 0033:0x45bee7 [ 60.778061][ T6816] Code: Bad RIP value. [ 60.782111][ T6816] RSP: 002b:00007ffe16345798 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.790589][ T6816] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.803676][ T6816] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007ffe16345970 [ 60.811625][ T6816] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000027c0 [ 60.819675][ T6816] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.827710][ T6816] R13: 00007ffe16345970 R14: 8421084210842109 R15: 00007ffe1634597c [ 60.909970][ T6817] IPVS: ftp: loaded support on port[0] = 21 [ 60.946331][ T6817] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6817 [ 60.955803][ T6817] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.961694][ T6817] CPU: 1 PID: 6817 Comm: syz-executor.0 Not tainted 5.7.0-next-20200610-syzkaller #0 [ 60.971215][ T6817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.981267][ T6817] Call Trace: [ 60.984542][ T6817] dump_stack+0x18f/0x20d [ 60.988860][ T6817] check_preemption_disabled+0x20d/0x220 [ 60.994500][ T6817] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.999614][ T6817] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.005051][ T6817] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.010752][ T6817] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.016023][ T6817] ? ext4_ext_release+0x10/0x10 [ 61.020861][ T6817] ? down_write_killable+0x170/0x170 [ 61.026166][ T6817] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.031622][ T6817] ext4_map_blocks+0x4cb/0x1640 [ 61.036459][ T6817] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.041632][ T6817] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.047156][ T6817] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.053128][ T6817] ? prandom_u32_state+0xe/0x170 [ 61.058077][ T6817] ? __brelse+0x84/0xa0 [ 61.062219][ T6817] ? __ext4_new_inode+0x144/0x55e0 [ 61.067334][ T6817] ext4_getblk+0xad/0x520 [ 61.071744][ T6817] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 61.077454][ T6817] ? ext4_free_inode+0x1700/0x1700 [ 61.082559][ T6817] ext4_bread+0x7c/0x380 [ 61.086795][ T6817] ? ext4_getblk+0x520/0x520 [ 61.091362][ T6817] ? dquot_get_next_dqblk+0x180/0x180 [ 61.096715][ T6817] ext4_append+0x153/0x360 [ 61.101110][ T6817] ext4_mkdir+0x5e0/0xdf0 [ 61.105422][ T6817] ? ext4_rmdir+0xde0/0xde0 [ 61.109927][ T6817] ? security_inode_permission+0xc4/0xf0 [ 61.115561][ T6817] vfs_mkdir+0x419/0x690 [ 61.119783][ T6817] do_mkdirat+0x21e/0x280 [ 61.124093][ T6817] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.129023][ T6817] ? do_syscall_64+0x1c/0xe0 [ 61.133602][ T6817] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.139573][ T6817] do_syscall_64+0x60/0xe0 [ 61.143983][ T6817] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.149972][ T6817] RIP: 0033:0x45bee7 [ 61.153879][ T6817] Code: Bad RIP value. [ 61.157937][ T6817] RSP: 002b:00007ffe16345688 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 61.166333][ T6817] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 61.174739][ T6817] RDX: 00007ffe163456d3 RSI: 00000000000001ff RDI: 00007ffe163456d0 [ 61.182956][ T6817] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 61.190931][ T6817] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 61.198893][ T6817] R13: 00007ffe163456c0 R14: 0000000000000000 R15: 00007ffe163456d0 [ 61.225201][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 61.234484][ T1154] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.240415][ T1154] CPU: 1 PID: 1154 Comm: khugepaged Not tainted 5.7.0-next-20200610-syzkaller #0 [ 61.249523][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.259577][ T1154] Call Trace: [ 61.262879][ T1154] dump_stack+0x18f/0x20d [ 61.267224][ T1154] check_preemption_disabled+0x20d/0x220 [ 61.272875][ T1154] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.277995][ T1154] ? ext4_find_extent+0x81a/0xad0 [ 61.283036][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.288504][ T1154] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.294240][ T1154] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.299544][ T1154] ? ext4_ext_release+0x10/0x10 [ 61.304421][ T1154] ? down_write_killable+0x170/0x170 [ 61.309714][ T1154] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.315225][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 61.320098][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.325310][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.330905][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.336874][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 61.342313][ T1154] ext4_writepages+0x1a83/0x33c0 [ 61.347238][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.352887][ T1154] ? __lock_acquire+0x2224/0x48b0 [ 61.358077][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 61.363702][ T1154] ? do_writepages+0xf3/0x2a0 [ 61.368353][ T1154] do_writepages+0xf3/0x2a0 [ 61.372927][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 61.378536][ T1154] ? do_raw_spin_lock+0x120/0x2d0 [ 61.383555][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 61.388733][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 61.393565][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 61.400825][ T1154] ? collapse_file+0x35a2/0x4330 [ 61.405755][ T1154] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 61.412435][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 61.417611][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.424449][ T1154] collapse_file+0x35ac/0x4330 [ 61.429197][ T1154] ? collapse_huge_page+0x4350/0x4350 [ 61.435517][ T1154] ? khugepaged+0x2506/0x3fc0 [ 61.440356][ T1154] ? xas_find+0x31a/0x880 [ 61.444670][ T1154] ? check_preemption_disabled+0x38/0x220 [ 61.450387][ T1154] khugepaged+0x3041/0x3fc0 [ 61.455061][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 61.460690][ T1154] ? lock_downgrade+0x840/0x840 [ 61.465532][ T1154] ? finish_wait+0x260/0x260 [ 61.470218][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 61.476372][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.482336][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 61.487801][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 61.493533][ T1154] kthread+0x3b5/0x4a0 [ 61.497587][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.503387][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.509098][ T1154] ret_from_fork+0x1f/0x30 [ 61.516130][ T6817] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6817 [ 61.525590][ T6817] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.531674][ T6817] CPU: 1 PID: 6817 Comm: syz-executor.0 Not tainted 5.7.0-next-20200610-syzkaller #0 [ 61.541120][ T6817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.551171][ T6817] Call Trace: [ 61.554468][ T6817] dump_stack+0x18f/0x20d [ 61.558800][ T6817] check_preemption_disabled+0x20d/0x220 [ 61.564428][ T6817] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.569519][ T6817] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.575115][ T6817] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 61.580978][ T6817] ext4_ext_map_blocks+0x201b/0x33e0 [ 61.586295][ T6817] ? ext4_ext_release+0x10/0x10 [ 61.591141][ T6817] ? down_write_killable+0x170/0x170 [ 61.596426][ T6817] ? ext4_es_lookup_extent+0x41d/0xd10 [ 61.601869][ T6817] ext4_map_blocks+0x4cb/0x1640 [ 61.606702][ T6817] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 61.612626][ T6817] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 61.618776][ T6817] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.624740][ T6817] ? prandom_u32_state+0xe/0x170 [ 61.629667][ T6817] ? __brelse+0x84/0xa0 [ 61.633816][ T6817] ? __ext4_new_inode+0x144/0x55e0 [ 61.638945][ T6817] ext4_getblk+0xad/0x520 [ 61.643255][ T6817] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 61.648969][ T6817] ? ext4_free_inode+0x1700/0x1700 [ 61.654062][ T6817] ext4_bread+0x7c/0x380 [ 61.658287][ T6817] ? ext4_getblk+0x520/0x520 [ 61.662877][ T6817] ? dquot_get_next_dqblk+0x180/0x180 [ 61.668320][ T6817] ext4_append+0x153/0x360 [ 61.672727][ T6817] ext4_mkdir+0x5e0/0xdf0 [ 61.677037][ T6817] ? ext4_rmdir+0xde0/0xde0 [ 61.681519][ T6817] ? security_inode_permission+0xc4/0xf0 [ 61.687478][ T6817] vfs_mkdir+0x419/0x690 [ 61.691721][ T6817] do_mkdirat+0x21e/0x280 [ 61.696042][ T6817] ? __ia32_sys_mknod+0xb0/0xb0 [ 61.700893][ T6817] ? do_syscall_64+0x1c/0xe0 [ 61.705471][ T6817] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 61.713527][ T6817] do_syscall_64+0x60/0xe0 [ 61.717941][ T6817] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.723827][ T6817] RIP: 0033:0x45bee7 [ 61.727828][ T6817] Code: Bad RIP value. [ 61.731895][ T6817] RSP: 002b:00007ffe16345688 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 61.740289][ T6817] RAX: ffffffffffffffda RBX: 000000000000f051 RCX: 000000000045bee7 [ 61.748284][ T6817] RDX: 00007ffe163456d3 RSI: 00000000000001ff RDI: 00007ffe163456d0 [ 61.756241][ T6817] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 61.764195][ T6817] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 2020/06/10 10:08:52 building call list... [ 61.772153][ T6817] R13: 00007ffe163456c0 R14: 000000000000ef2a R15: 00007ffe163456d0 [ 61.940284][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 61.949604][ T1154] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.955671][ T1154] CPU: 1 PID: 1154 Comm: khugepaged Not tainted 5.7.0-next-20200610-syzkaller #0 [ 61.964779][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.974829][ T1154] Call Trace: [ 61.978119][ T1154] dump_stack+0x18f/0x20d [ 61.982559][ T1154] check_preemption_disabled+0x20d/0x220 [ 61.988190][ T1154] ext4_mb_new_blocks+0xa4d/0x3b70 [ 61.993569][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 61.999046][ T1154] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 62.005278][ T1154] ext4_ext_map_blocks+0x201b/0x33e0 [ 62.010573][ T1154] ? ext4_ext_release+0x10/0x10 [ 62.015449][ T1154] ? down_write_killable+0x170/0x170 [ 62.020776][ T1154] ? ext4_es_lookup_extent+0x41d/0xd10 [ 62.026238][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 62.031078][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 62.036280][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.041819][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.047829][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 62.053305][ T1154] ext4_writepages+0x1a83/0x33c0 [ 62.058289][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.064016][ T1154] ? __lock_acquire+0x2224/0x48b0 [ 62.069072][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.074711][ T1154] ? do_writepages+0xf3/0x2a0 [ 62.079382][ T1154] do_writepages+0xf3/0x2a0 [ 62.083883][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 62.089543][ T1154] ? do_raw_spin_lock+0x120/0x2d0 [ 62.094577][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 62.099776][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 62.104634][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 62.110353][ T1154] ? collapse_file+0x35a2/0x4330 [ 62.115284][ T1154] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 62.121353][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 62.126595][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 62.132569][ T1154] collapse_file+0x35ac/0x4330 [ 62.137356][ T1154] ? collapse_huge_page+0x4350/0x4350 [ 62.142786][ T1154] ? khugepaged+0x2506/0x3fc0 [ 62.147468][ T1154] ? xas_find+0x31a/0x880 [ 62.151864][ T1154] ? check_preemption_disabled+0x38/0x220 [ 62.157984][ T1154] khugepaged+0x3041/0x3fc0 [ 62.162503][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 62.168122][ T1154] ? lock_downgrade+0x840/0x840 [ 62.172959][ T1154] ? finish_wait+0x260/0x260 [ 62.177586][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 62.183407][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 62.189395][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 62.194648][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 62.200292][ T1154] kthread+0x3b5/0x4a0 [ 62.204369][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.210101][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.215824][ T1154] ret_from_fork+0x1f/0x30 [ 62.275488][ T1154] BUG: using smp_processor_id() in preemptible [00000000] code: khugepaged/1154 [ 62.284621][ T1154] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.290514][ T1154] CPU: 1 PID: 1154 Comm: khugepaged Not tainted 5.7.0-next-20200610-syzkaller #0 [ 62.299620][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.309701][ T1154] Call Trace: [ 62.313015][ T1154] dump_stack+0x18f/0x20d [ 62.317350][ T1154] check_preemption_disabled+0x20d/0x220 [ 62.322979][ T1154] ext4_mb_new_blocks+0xa4d/0x3b70 [ 62.328097][ T1154] ? ext4_ext_search_right+0x2ca/0xb20 [ 62.333640][ T1154] ? ext4_ext_next_allocated_block+0x221/0x2d0 [ 62.339792][ T1154] ext4_ext_map_blocks+0x201b/0x33e0 [ 62.345100][ T1154] ? ext4_ext_release+0x10/0x10 [ 62.349966][ T1154] ? down_write_killable+0x170/0x170 [ 62.355257][ T1154] ? ext4_es_lookup_extent+0x41d/0xd10 [ 62.360726][ T1154] ext4_map_blocks+0x4cb/0x1640 [ 62.365585][ T1154] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 62.370808][ T1154] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 62.376349][ T1154] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.382328][ T1154] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 62.387782][ T1154] ext4_writepages+0x1a83/0x33c0 [ 62.393158][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.398788][ T1154] ? __lock_acquire+0x2224/0x48b0 [ 62.403844][ T1154] ? __ext4_mark_inode_dirty+0x940/0x940 [ 62.409475][ T1154] ? do_writepages+0xf3/0x2a0 [ 62.414168][ T1154] do_writepages+0xf3/0x2a0 [ 62.418673][ T1154] ? page_writeback_cpu_online+0x10/0x10 [ 62.424316][ T1154] ? do_raw_spin_lock+0x120/0x2d0 [ 62.429346][ T1154] ? do_raw_spin_unlock+0x171/0x260 [ 62.434544][ T1154] ? _raw_spin_unlock+0x24/0x40 [ 62.439396][ T1154] __filemap_fdatawrite_range+0x2aa/0x390 [ 62.445113][ T1154] ? collapse_file+0x35a2/0x4330 [ 62.450044][ T1154] ? delete_from_page_cache_batch+0xeb0/0xeb0 [ 62.456148][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 62.461358][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 62.467369][ T1154] collapse_file+0x35ac/0x4330 [ 62.472149][ T1154] ? collapse_huge_page+0x4350/0x4350 [ 62.477514][ T1154] ? khugepaged+0x2506/0x3fc0 [ 62.482302][ T1154] ? xas_find+0x31a/0x880 [ 62.486657][ T1154] ? check_preemption_disabled+0x38/0x220 [ 62.493001][ T1154] khugepaged+0x3041/0x3fc0 [ 62.497529][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 62.503160][ T1154] ? lock_downgrade+0x840/0x840 [ 62.508023][ T1154] ? finish_wait+0x260/0x260 [ 62.512625][ T1154] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 62.518432][ T1154] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 62.524419][ T1154] ? __kthread_parkme+0x13f/0x1e0 [ 62.529442][ T1154] ? collapse_pte_mapped_thp+0xbf0/0xbf0 [ 62.535073][ T1154] kthread+0x3b5/0x4a0 [ 62.539138][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.544850][ T1154] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.551528][ T1154] ret_from_fork+0x1f/0x30 [ 62.632725][ T26] tipc: TX() has been purged, node left! executing program [ 63.154024][ T26] ================================================================== [ 63.162265][ T26] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 63.170161][ T26] Write of size 1 at addr ffff8880920f11e4 by task kworker/u4:2/26 [ 63.178040][ T26] [ 63.180372][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Not tainted 5.7.0-next-20200610-syzkaller #0 [ 63.189466][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.199520][ T26] Workqueue: netns cleanup_net [ 63.204288][ T26] Call Trace: [ 63.207606][ T26] dump_stack+0x18f/0x20d [ 63.211970][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.217514][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.223053][ T26] ? afs_put_call+0xa40/0xa40 [ 63.227729][ T26] print_address_description.constprop.0.cold+0xd3/0x413 [ 63.234756][ T26] ? vprintk_func+0x97/0x1a6 [ 63.240392][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.245933][ T26] kasan_report.cold+0x1f/0x37 [ 63.250709][ T26] ? rcu_read_lock_held_common+0x71/0xa0 [ 63.256339][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.261885][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 63.267254][ T26] ? afs_close_socket+0x320/0x320 [ 63.272276][ T26] ? afs_put_call+0xa40/0xa40 [ 63.276970][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 63.282136][ T26] ? afs_put_call+0xa40/0xa40 [ 63.286870][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 63.293288][ T26] rxrpc_call_completed+0xca/0xf0 [ 63.298312][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 63.303686][ T26] ? lock_sock_nested+0x94/0x110 [ 63.308621][ T26] rxrpc_listen+0x147/0x360 [ 63.313131][ T26] afs_close_socket+0x95/0x320 [ 63.317889][ T26] ? afs_purge_servers+0x16d/0x300 [ 63.323002][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 63.328462][ T26] ? init_wait_var_entry+0x200/0x200 [ 63.333747][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 63.339377][ T26] ? check_preemption_disabled+0x38/0x220 [ 63.345099][ T26] afs_net_exit+0x1bc/0x310 [ 63.349606][ T26] ? afs_net_init+0xe30/0xe30 [ 63.354280][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 63.359395][ T26] cleanup_net+0x511/0xa50 [ 63.363812][ T26] ? unregister_pernet_device+0x70/0x70 [ 63.369449][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.375435][ T26] process_one_work+0x965/0x1690 [ 63.380378][ T26] ? lock_release+0x800/0x800 [ 63.385053][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 63.390426][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 63.395493][ T26] worker_thread+0x96/0xe10 [ 63.400006][ T26] ? process_one_work+0x1690/0x1690 [ 63.405232][ T26] kthread+0x3b5/0x4a0 [ 63.409298][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.415016][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.420755][ T26] ret_from_fork+0x1f/0x30 [ 63.425180][ T26] [ 63.427501][ T26] Allocated by task 6817: [ 63.431827][ T26] save_stack+0x1b/0x40 [ 63.436688][ T26] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 63.442312][ T26] kmem_cache_alloc_trace+0x153/0x7d0 [ 63.447680][ T26] afs_alloc_call+0x55/0x630 [ 63.452266][ T26] afs_charge_preallocation+0xe9/0x2d0 [ 63.457715][ T26] afs_open_socket+0x292/0x360 [ 63.462479][ T26] afs_net_init+0xa6c/0xe30 [ 63.466981][ T26] ops_init+0xaf/0x420 [ 63.471103][ T26] setup_net+0x2de/0x860 [ 63.475367][ T26] copy_net_ns+0x293/0x590 [ 63.479787][ T26] create_new_namespaces+0x3fb/0xb30 [ 63.485100][ T26] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 63.490836][ T26] ksys_unshare+0x43d/0x8e0 [ 63.495341][ T26] __x64_sys_unshare+0x2d/0x40 [ 63.500100][ T26] do_syscall_64+0x60/0xe0 [ 63.504524][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.510409][ T26] [ 63.512737][ T26] Freed by task 26: [ 63.516546][ T26] save_stack+0x1b/0x40 [ 63.520697][ T26] __kasan_slab_free+0xf7/0x140 [ 63.525545][ T26] kfree+0x109/0x2b0 [ 63.529437][ T26] afs_put_call+0x585/0xa40 [ 63.533946][ T26] rxrpc_discard_prealloc+0x764/0xab0 [ 63.539316][ T26] rxrpc_listen+0x147/0x360 [ 63.543821][ T26] afs_close_socket+0x95/0x320 [ 63.548584][ T26] afs_net_exit+0x1bc/0x310 [ 63.553092][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 63.558213][ T26] cleanup_net+0x511/0xa50 [ 63.562636][ T26] process_one_work+0x965/0x1690 [ 63.567576][ T26] worker_thread+0x96/0xe10 [ 63.572089][ T26] kthread+0x3b5/0x4a0 [ 63.576166][ T26] ret_from_fork+0x1f/0x30 [ 63.580580][ T26] [ 63.582910][ T26] The buggy address belongs to the object at ffff8880920f1000 [ 63.582910][ T26] which belongs to the cache kmalloc-1k of size 1024 [ 63.596965][ T26] The buggy address is located 484 bytes inside of [ 63.596965][ T26] 1024-byte region [ffff8880920f1000, ffff8880920f1400) [ 63.610320][ T26] The buggy address belongs to the page: [ 63.615952][ T26] page:ffffea0002483c40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 63.625587][ T26] flags: 0xfffe0000000200(slab) [ 63.630440][ T26] raw: 00fffe0000000200 ffffea00027d3248 ffffea0002497388 ffff8880aa000c40 [ 63.639009][ T26] raw: 0000000000000000 ffff8880920f1000 0000000100000002 0000000000000000 [ 63.647589][ T26] page dumped because: kasan: bad access detected [ 63.653978][ T26] [ 63.656283][ T26] Memory state around the buggy address: [ 63.661893][ T26] ffff8880920f1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.670056][ T26] ffff8880920f1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.678125][ T26] >ffff8880920f1180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.686348][ T26] ^ [ 63.693560][ T26] ffff8880920f1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.701625][ T26] ffff8880920f1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.709925][ T26] ================================================================== [ 63.717990][ T26] Disabling lock debugging due to kernel taint [ 63.724184][ T26] Kernel panic - not syncing: panic_on_warn set ... [ 63.730771][ T26] CPU: 0 PID: 26 Comm: kworker/u4:2 Tainted: G B 5.7.0-next-20200610-syzkaller #0 [ 63.741259][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.751319][ T26] Workqueue: netns cleanup_net [ 63.756081][ T26] Call Trace: [ 63.759454][ T26] dump_stack+0x18f/0x20d [ 63.763762][ T26] ? afs_wake_up_async_call+0x5c0/0x770 [ 63.769283][ T26] ? afs_put_call+0xa40/0xa40 [ 63.774113][ T26] panic+0x2e3/0x75c [ 63.777988][ T26] ? __warn_printk+0xf3/0xf3 [ 63.782552][ T26] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 63.788717][ T26] ? trace_hardirqs_on+0x55/0x220 [ 63.793742][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.799266][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.804787][ T26] ? afs_put_call+0xa40/0xa40 [ 63.809452][ T26] end_report+0x4d/0x53 [ 63.813702][ T26] kasan_report.cold+0xd/0x37 [ 63.818528][ T26] ? rcu_read_lock_held_common+0x71/0xa0 [ 63.824145][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.829696][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 63.835059][ T26] ? afs_close_socket+0x320/0x320 [ 63.840077][ T26] ? afs_put_call+0xa40/0xa40 [ 63.844734][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 63.849825][ T26] ? afs_put_call+0xa40/0xa40 [ 63.854480][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 63.860869][ T26] rxrpc_call_completed+0xca/0xf0 [ 63.865869][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 63.871217][ T26] ? lock_sock_nested+0x94/0x110 [ 63.876129][ T26] rxrpc_listen+0x147/0x360 [ 63.880636][ T26] afs_close_socket+0x95/0x320 [ 63.885395][ T26] ? afs_purge_servers+0x16d/0x300 [ 63.890487][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 63.895944][ T26] ? init_wait_var_entry+0x200/0x200 [ 63.901242][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 63.906872][ T26] ? check_preemption_disabled+0x38/0x220 [ 63.912574][ T26] afs_net_exit+0x1bc/0x310 [ 63.917427][ T26] ? afs_net_init+0xe30/0xe30 [ 63.922080][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 63.927166][ T26] cleanup_net+0x511/0xa50 [ 63.931569][ T26] ? unregister_pernet_device+0x70/0x70 [ 63.937102][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.943081][ T26] process_one_work+0x965/0x1690 [ 63.948014][ T26] ? lock_release+0x800/0x800 [ 63.952736][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 63.958302][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 63.963233][ T26] worker_thread+0x96/0xe10 [ 63.967754][ T26] ? process_one_work+0x1690/0x1690 [ 63.972941][ T26] kthread+0x3b5/0x4a0 [ 63.977007][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.982707][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.988429][ T26] ret_from_fork+0x1f/0x30 [ 63.994368][ T26] Kernel Offset: disabled [ 63.998700][ T26] Rebooting in 86400 seconds..