[ OK ] Reached target Timers. Starting Permit User Sessions... Starting System Logging Service... [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. [ 52.455366][ T4790] systemd-udevd (4790) used greatest stack depth: 21824 bytes left [ 52.479232][ T4828] systemd-udevd (4828) used greatest stack depth: 21792 bytes left [ 53.037697][ T6710] scp (6710) used greatest stack depth: 21072 bytes left [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Upda[ 54.686301][ T6726] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6726 te UTMP about Sy[ 54.695843][ T6726] caller is ext4_mb_new_blocks+0xa4d/0x3b70 stem Runlevel Ch[ 54.703216][ T6726] CPU: 0 PID: 6726 Comm: systemd-rfkill Not tainted 5.7.0-next-20200611-syzkaller #0 [ 54.713941][ T6726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.724000][ T6726] Call Trace: anges. [ 54.727295][ T6726] dump_stack+0x18f/0x20d [ 54.732311][ T6726] check_preemption_disabled+0x20d/0x220 [ 54.738182][ T6726] ext4_mb_new_blocks+0xa4d/0x3b70 [ 54.743314][ T6726] ? ext4_ext_search_right+0x2ca/0xb20 [ 54.748800][ T6726] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 54.754541][ T6726] ext4_ext_map_blocks+0x201b/0x33e0 [ 54.759830][ T6726] ? ext4_ext_release+0x10/0x10 [ 54.764686][ T6726] ? down_write_killable+0x170/0x170 [ 54.769948][ T6726] ? ext4_es_lookup_extent+0x41d/0xd10 [ 54.775387][ T6726] ext4_map_blocks+0x4cb/0x1640 [ 54.780242][ T6726] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 54.785432][ T6726] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 54.790971][ T6726] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 54.796925][ T6726] ? prandom_u32_state+0xe/0x170 [ 54.801840][ T6726] ? __brelse+0x84/0xa0 [ 54.805972][ T6726] ? __ext4_new_inode+0x144/0x55e0 [ 54.811063][ T6726] ext4_getblk+0xad/0x520 [ 54.815388][ T6726] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 54.821107][ T6726] ? ext4_free_inode+0x1700/0x1700 [ 54.826199][ T6726] ext4_bread+0x7c/0x380 [ 54.830416][ T6726] ? ext4_getblk+0x520/0x520 [ 54.834992][ T6726] ? dquot_get_next_dqblk+0x180/0x180 [ 54.840360][ T6726] ext4_append+0x153/0x360 [ 54.844880][ T6726] ext4_mkdir+0x5e0/0xdf0 [ 54.849197][ T6726] ? ext4_rmdir+0xde0/0xde0 [ 54.853710][ T6726] ? security_inode_permission+0xc4/0xf0 [ 54.859331][ T6726] vfs_mkdir+0x419/0x690 [ 54.863574][ T6726] do_mkdirat+0x21e/0x280 [ 54.867883][ T6726] ? __ia32_sys_mknod+0xb0/0xb0 [ 54.872715][ T6726] ? do_syscall_64+0x1c/0xe0 [ 54.877283][ T6726] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.883256][ T6726] do_syscall_64+0x60/0xe0 [ 54.887650][ T6726] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.893518][ T6726] RIP: 0033:0x7f82f0d3b687 [ 54.897930][ T6726] Code: Bad RIP value. [ 54.901969][ T6726] RSP: 002b:00007ffc067067b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 54.910366][ T6726] RAX: ffffffffffffffda RBX: 00005569a7ce0985 RCX: 00007f82f0d3b687 [ 54.918426][ T6726] RDX: 00007ffc06706680 RSI: 00000000000001ed RDI: 00005569a7ce0985 [ 54.926373][ T6726] RBP: 00007f82f0d3b680 R08: 0000000000000100 R09: 0000000000000000 [ 54.934331][ T6726] R10: 00005569a7ce0980 R11: 0000000000000246 R12: 00000000000001ed [ 54.942301][ T6726] R13: 00007ffc06706940 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 58.190354][ T4139] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:6/4139 [ 58.199592][ T4139] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.205619][ T4139] CPU: 0 PID: 4139 Comm: kworker/u4:6 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 58.214914][ T4139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.224978][ T4139] Workqueue: writeback wb_workfn (flush-8:0) [ 58.230934][ T4139] Call Trace: [ 58.234212][ T4139] dump_stack+0x18f/0x20d [ 58.238545][ T4139] check_preemption_disabled+0x20d/0x220 [ 58.244177][ T4139] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.249264][ T4139] ? ext4_find_extent+0x81a/0xad0 [ 58.254280][ T4139] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.259716][ T4139] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.265421][ T4139] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.270690][ T4139] ? ext4_ext_release+0x10/0x10 [ 58.275531][ T4139] ? down_write_killable+0x170/0x170 [ 58.280811][ T4139] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.286272][ T4139] ext4_map_blocks+0x4cb/0x1640 [ 58.291104][ T4139] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.296313][ T4139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.301843][ T4139] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.307814][ T4139] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.313275][ T4139] ext4_writepages+0x1a83/0x33c0 [ 58.318201][ T4139] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.323813][ T4139] ? __lock_acquire+0x2224/0x48b0 [ 58.328832][ T4139] ? ext4_da_get_block_prep+0x1120/0x1120 [ 58.334529][ T4139] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.340488][ T4139] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.346097][ T4139] ? do_writepages+0xf3/0x2a0 [ 58.350750][ T4139] do_writepages+0xf3/0x2a0 [ 58.355233][ T4139] ? page_writeback_cpu_online+0x10/0x10 [ 58.360853][ T4139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.366394][ T4139] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.372366][ T4139] ? lock_downgrade+0x840/0x840 [ 58.377216][ T4139] __writeback_single_inode+0x12a/0x13d0 [ 58.382839][ T4139] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.388803][ T4139] writeback_sb_inodes+0x541/0xe40 [ 58.393915][ T4139] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.399804][ T4139] __writeback_inodes_wb+0xc6/0x280 [ 58.404984][ T4139] wb_writeback+0x8c9/0xd40 [ 58.409464][ T4139] ? find_held_lock+0x2d/0x110 [ 58.414231][ T4139] ? writeback_inodes_wb.constprop.0+0x1d0/0x1d0 [ 58.420596][ T4139] ? cpumask_next+0x3c/0x40 [ 58.425098][ T4139] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.430281][ T4139] wb_workfn+0xab5/0x1090 [ 58.434596][ T4139] ? inode_wait_for_writeback+0x30/0x30 [ 58.440125][ T4139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.445646][ T4139] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.451695][ T4139] process_one_work+0x965/0x1690 [ 58.456628][ T4139] ? lock_release+0x800/0x800 [ 58.461294][ T4139] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.466646][ T4139] ? rwlock_bug.part.0+0x90/0x90 [ 58.471582][ T4139] worker_thread+0x96/0xe10 [ 58.476068][ T4139] ? process_one_work+0x1690/0x1690 [ 58.481246][ T4139] kthread+0x3b5/0x4a0 [ 58.485317][ T4139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.491011][ T4139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.496708][ T4139] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.143' (ECDSA) to the list of known hosts. 2020/06/11 04:12:28 fuzzer started 2020/06/11 04:12:28 connecting to host at 10.128.0.26:42335 2020/06/11 04:12:28 checking machine... 2020/06/11 04:12:28 checking revisions... 2020/06/11 04:12:28 testing simple program... [ 59.794997][ T6808] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6808 [ 59.804077][ T6808] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.810065][ T6808] CPU: 0 PID: 6808 Comm: syz-fuzzer Not tainted 5.7.0-next-20200611-syzkaller #0 [ 59.819170][ T6808] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.829211][ T6808] Call Trace: [ 59.832499][ T6808] dump_stack+0x18f/0x20d [ 59.836829][ T6808] check_preemption_disabled+0x20d/0x220 [ 59.842455][ T6808] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.847548][ T6808] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.852982][ T6808] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.858681][ T6808] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.863948][ T6808] ? ext4_ext_release+0x10/0x10 [ 59.868784][ T6808] ? down_write_killable+0x170/0x170 [ 59.874052][ T6808] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.879515][ T6808] ext4_map_blocks+0x4cb/0x1640 [ 59.884359][ T6808] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.889542][ T6808] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.895074][ T6808] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.901050][ T6808] ? prandom_u32_state+0xe/0x170 [ 59.905982][ T6808] ? __brelse+0x84/0xa0 [ 59.910116][ T6808] ? __ext4_new_inode+0x144/0x55e0 [ 59.915222][ T6808] ext4_getblk+0xad/0x520 [ 59.919538][ T6808] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.925263][ T6808] ? ext4_free_inode+0x1700/0x1700 [ 59.930368][ T6808] ext4_bread+0x7c/0x380 [ 59.934591][ T6808] ? ext4_getblk+0x520/0x520 [ 59.939189][ T6808] ? dquot_get_next_dqblk+0x180/0x180 [ 59.944555][ T6808] ext4_append+0x153/0x360 [ 59.948957][ T6808] ext4_mkdir+0x5e0/0xdf0 [ 59.953277][ T6808] ? ext4_rmdir+0xde0/0xde0 [ 59.957783][ T6808] ? security_inode_permission+0xc4/0xf0 [ 59.963399][ T6808] vfs_mkdir+0x419/0x690 [ 59.967640][ T6808] do_mkdirat+0x21e/0x280 [ 59.971971][ T6808] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.976808][ T6808] ? do_syscall_64+0x1c/0xe0 [ 59.981395][ T6808] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.987361][ T6808] do_syscall_64+0x60/0xe0 [ 59.991758][ T6808] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.997624][ T6808] RIP: 0033:0x4b02a0 [ 60.001491][ T6808] Code: Bad RIP value. [ 60.005530][ T6808] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 60.013913][ T6808] RAX: ffffffffffffffda RBX: 000000c00002e500 RCX: 00000000004b02a0 [ 60.021883][ T6808] RDX: 00000000000001c0 RSI: 000000c00009cca0 RDI: ffffffffffffff9c [ 60.029835][ T6808] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 [ 60.037795][ T6808] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 60.045758][ T6808] R13: 0000000000000066 R14: 0000000000000065 R15: 0000000000000100 [ 60.090130][ T6817] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6817 [ 60.099588][ T6817] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.105495][ T6817] CPU: 0 PID: 6817 Comm: syz-executor.0 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 60.114946][ T6817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.125002][ T6817] Call Trace: [ 60.128291][ T6817] dump_stack+0x18f/0x20d [ 60.132607][ T6817] check_preemption_disabled+0x20d/0x220 [ 60.138231][ T6817] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.143329][ T6817] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.148769][ T6817] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.154485][ T6817] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.159781][ T6817] ? ext4_ext_release+0x10/0x10 [ 60.164629][ T6817] ? down_write_killable+0x170/0x170 [ 60.169893][ T6817] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.175339][ T6817] ext4_map_blocks+0x4cb/0x1640 [ 60.180324][ T6817] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.185499][ T6817] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.191045][ T6817] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.197011][ T6817] ? prandom_u32_state+0xe/0x170 [ 60.201928][ T6817] ? __brelse+0x84/0xa0 [ 60.206076][ T6817] ? __ext4_new_inode+0x144/0x55e0 [ 60.211164][ T6817] ext4_getblk+0xad/0x520 [ 60.215471][ T6817] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.221183][ T6817] ? ext4_free_inode+0x1700/0x1700 [ 60.226674][ T6817] ext4_bread+0x7c/0x380 [ 60.230897][ T6817] ? ext4_getblk+0x520/0x520 [ 60.235467][ T6817] ? dquot_get_next_dqblk+0x180/0x180 [ 60.240833][ T6817] ext4_append+0x153/0x360 [ 60.245243][ T6817] ext4_mkdir+0x5e0/0xdf0 [ 60.249553][ T6817] ? ext4_rmdir+0xde0/0xde0 [ 60.254115][ T6817] ? security_inode_permission+0xc4/0xf0 [ 60.259738][ T6817] vfs_mkdir+0x419/0x690 [ 60.263973][ T6817] do_mkdirat+0x21e/0x280 [ 60.268288][ T6817] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.273128][ T6817] ? do_syscall_64+0x1c/0xe0 [ 60.277696][ T6817] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.283671][ T6817] do_syscall_64+0x60/0xe0 [ 60.288065][ T6817] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.293935][ T6817] RIP: 0033:0x45bee7 [ 60.297800][ T6817] Code: Bad RIP value. [ 60.301867][ T6817] RSP: 002b:00007ffe7fd97fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.310252][ T6817] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.318198][ T6817] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffe7fd98190 [ 60.326146][ T6817] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000036c0 [ 60.334115][ T6817] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.342079][ T6817] R13: 00007ffe7fd98190 R14: 8421084210842109 R15: 00007ffe7fd9819c [ 60.424709][ T6818] IPVS: ftp: loaded support on port[0] = 21 [ 60.460594][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 60.470139][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.476017][ T6818] CPU: 1 PID: 6818 Comm: syz-executor.0 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 60.485447][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.495492][ T6818] Call Trace: [ 60.498779][ T6818] dump_stack+0x18f/0x20d [ 60.503097][ T6818] check_preemption_disabled+0x20d/0x220 [ 60.508707][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.513802][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.519237][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.524954][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.530241][ T6818] ? ext4_ext_release+0x10/0x10 [ 60.535097][ T6818] ? down_write_killable+0x170/0x170 [ 60.540359][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.545799][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 60.550630][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.555824][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.561364][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.567317][ T6818] ? prandom_u32_state+0xe/0x170 [ 60.572234][ T6818] ? __brelse+0x84/0xa0 [ 60.576380][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 60.581485][ T6818] ext4_getblk+0xad/0x520 [ 60.585791][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.591510][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 60.596622][ T6818] ext4_bread+0x7c/0x380 [ 60.600855][ T6818] ? ext4_getblk+0x520/0x520 [ 60.605425][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 60.610778][ T6818] ext4_append+0x153/0x360 [ 60.615275][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 60.619603][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 60.624130][ T6818] ? security_inode_permission+0xc4/0xf0 [ 60.629756][ T6818] vfs_mkdir+0x419/0x690 [ 60.633989][ T6818] do_mkdirat+0x21e/0x280 [ 60.638303][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.643150][ T6818] ? do_syscall_64+0x1c/0xe0 [ 60.647735][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.653709][ T6818] do_syscall_64+0x60/0xe0 [ 60.658114][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.664024][ T6818] RIP: 0033:0x45bee7 [ 60.667907][ T6818] Code: Bad RIP value. [ 60.671955][ T6818] RSP: 002b:00007ffe7fd97ea8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.680349][ T6818] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 60.688394][ T6818] RDX: 00007ffe7fd97ef3 RSI: 00000000000001ff RDI: 00007ffe7fd97ef0 [ 60.696343][ T6818] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 60.704331][ T6818] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185d0 [ 60.712288][ T6818] R13: 00007ffe7fd97ee0 R14: 0000000000000000 R15: 00007ffe7fd97ef0 [ 60.770494][ T6818] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6818 [ 60.780004][ T6818] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.785911][ T6818] CPU: 0 PID: 6818 Comm: syz-executor.0 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 60.795365][ T6818] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.805427][ T6818] Call Trace: [ 60.808725][ T6818] dump_stack+0x18f/0x20d [ 60.813071][ T6818] check_preemption_disabled+0x20d/0x220 [ 60.818717][ T6818] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.823876][ T6818] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.829450][ T6818] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.835194][ T6818] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.840487][ T6818] ? ext4_ext_release+0x10/0x10 [ 60.845332][ T6818] ? down_write_killable+0x170/0x170 [ 60.850594][ T6818] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.856039][ T6818] ext4_map_blocks+0x4cb/0x1640 [ 60.860878][ T6818] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.866052][ T6818] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.871578][ T6818] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.877532][ T6818] ? prandom_u32_state+0xe/0x170 [ 60.882461][ T6818] ? __brelse+0x84/0xa0 [ 60.886607][ T6818] ? __ext4_new_inode+0x144/0x55e0 [ 60.891729][ T6818] ext4_getblk+0xad/0x520 [ 60.896075][ T6818] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.901784][ T6818] ? ext4_free_inode+0x1700/0x1700 [ 60.906874][ T6818] ext4_bread+0x7c/0x380 [ 60.911094][ T6818] ? ext4_getblk+0x520/0x520 [ 60.915660][ T6818] ? dquot_get_next_dqblk+0x180/0x180 [ 60.921029][ T6818] ext4_append+0x153/0x360 [ 60.925426][ T6818] ext4_mkdir+0x5e0/0xdf0 [ 60.929736][ T6818] ? ext4_rmdir+0xde0/0xde0 [ 60.934312][ T6818] ? security_inode_permission+0xc4/0xf0 [ 60.939927][ T6818] vfs_mkdir+0x419/0x690 [ 60.944152][ T6818] do_mkdirat+0x21e/0x280 [ 60.948459][ T6818] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.953302][ T6818] ? do_syscall_64+0x1c/0xe0 [ 60.957881][ T6818] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.963843][ T6818] do_syscall_64+0x60/0xe0 [ 60.968237][ T6818] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.974117][ T6818] RIP: 0033:0x45bee7 [ 60.977981][ T6818] Code: Bad RIP value. [ 60.982030][ T6818] RSP: 002b:00007ffe7fd97ea8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.990434][ T6818] RAX: ffffffffffffffda RBX: 000000000000ed5a RCX: 000000000045bee7 [ 60.998383][ T6818] RDX: 00007ffe7fd97ef3 RSI: 00000000000001ff RDI: 00007ffe7fd97ef0 [ 61.006505][ T6818] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/11 04:12:29 building call list... [ 61.014458][ T6818] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 61.022439][ T6818] R13: 00007ffe7fd97ee0 R14: 000000000000ed4a R15: 00007ffe7fd97ef0 [ 61.279495][ T4139] tipc: TX() has been purged, node left! [ 61.791603][ T4139] ================================================================== [ 61.799822][ T4139] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 61.807824][ T4139] Write of size 1 at addr ffff88809e91e9e4 by task kworker/u4:6/4139 [ 61.815873][ T4139] [ 61.818203][ T4139] CPU: 0 PID: 4139 Comm: kworker/u4:6 Not tainted 5.7.0-next-20200611-syzkaller #0 [ 61.827470][ T4139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.837530][ T4139] Workqueue: netns cleanup_net [ 61.842281][ T4139] Call Trace: [ 61.845571][ T4139] dump_stack+0x18f/0x20d [ 61.849902][ T4139] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.855440][ T4139] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.860979][ T4139] ? afs_put_call+0xa40/0xa40 [ 61.865652][ T4139] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.872678][ T4139] ? vprintk_func+0x97/0x1a6 [ 61.877268][ T4139] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.882844][ T4139] kasan_report.cold+0x1f/0x37 [ 61.887607][ T4139] ? rcu_read_lock_held_common+0x71/0xa0 [ 61.893236][ T4139] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.898803][ T4139] afs_wake_up_async_call+0x6aa/0x770 [ 61.904171][ T4139] ? afs_close_socket+0x320/0x320 [ 61.909192][ T4139] ? afs_put_call+0xa40/0xa40 [ 61.913866][ T4139] rxrpc_notify_socket+0x1db/0x5d0 [ 61.919151][ T4139] ? afs_put_call+0xa40/0xa40 [ 61.923822][ T4139] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.930237][ T4139] rxrpc_call_completed+0xca/0xf0 [ 61.935259][ T4139] rxrpc_discard_prealloc+0x781/0xab0 [ 61.940631][ T4139] ? lock_sock_nested+0x94/0x110 [ 61.945583][ T4139] rxrpc_listen+0x147/0x360 [ 61.950090][ T4139] afs_close_socket+0x95/0x320 [ 61.954847][ T4139] ? afs_purge_servers+0x16d/0x300 [ 61.959956][ T4139] ? afs_rx_discard_new_call+0x50/0x50 [ 61.965416][ T4139] ? init_wait_var_entry+0x200/0x200 [ 61.970699][ T4139] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.976360][ T4139] ? check_preemption_disabled+0x38/0x220 [ 61.982080][ T4139] afs_net_exit+0x1bc/0x310 [ 61.986611][ T4139] ? afs_net_init+0xe30/0xe30 [ 61.991284][ T4139] ops_exit_list.isra.0+0xa8/0x150 [ 61.996408][ T4139] cleanup_net+0x511/0xa50 [ 62.000874][ T4139] ? unregister_pernet_device+0x70/0x70 [ 62.006445][ T4139] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.012467][ T4139] process_one_work+0x965/0x1690 [ 62.017432][ T4139] ? lock_release+0x800/0x800 [ 62.022107][ T4139] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.027482][ T4139] ? rwlock_bug.part.0+0x90/0x90 [ 62.032430][ T4139] worker_thread+0x96/0xe10 [ 62.036944][ T4139] ? process_one_work+0x1690/0x1690 [ 62.042141][ T4139] kthread+0x3b5/0x4a0 [ 62.046206][ T4139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.051931][ T4139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.057668][ T4139] ret_from_fork+0x1f/0x30 [ 62.062095][ T4139] [ 62.064422][ T4139] Allocated by task 6818: [ 62.068743][ T4139] save_stack+0x1b/0x40 [ 62.072879][ T4139] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 62.078492][ T4139] kmem_cache_alloc_trace+0x153/0x7d0 [ 62.083849][ T4139] afs_alloc_call+0x55/0x630 [ 62.088436][ T4139] afs_charge_preallocation+0xe9/0x2d0 [ 62.093892][ T4139] afs_open_socket+0x292/0x360 [ 62.098643][ T4139] afs_net_init+0xa6c/0xe30 [ 62.103128][ T4139] ops_init+0xaf/0x420 [ 62.107186][ T4139] setup_net+0x2de/0x860 [ 62.111429][ T4139] copy_net_ns+0x293/0x590 [ 62.115836][ T4139] create_new_namespaces+0x3fb/0xb30 [ 62.121123][ T4139] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 62.126749][ T4139] ksys_unshare+0x43d/0x8e0 [ 62.131246][ T4139] __x64_sys_unshare+0x2d/0x40 [ 62.136037][ T4139] do_syscall_64+0x60/0xe0 [ 62.140567][ T4139] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.146445][ T4139] [ 62.148765][ T4139] Freed by task 4139: [ 62.152747][ T4139] save_stack+0x1b/0x40 [ 62.156897][ T4139] __kasan_slab_free+0xf7/0x140 [ 62.161760][ T4139] kfree+0x109/0x2b0 [ 62.165650][ T4139] afs_put_call+0x585/0xa40 [ 62.170152][ T4139] rxrpc_discard_prealloc+0x764/0xab0 [ 62.175516][ T4139] rxrpc_listen+0x147/0x360 [ 62.180013][ T4139] afs_close_socket+0x95/0x320 [ 62.184771][ T4139] afs_net_exit+0x1bc/0x310 [ 62.189268][ T4139] ops_exit_list.isra.0+0xa8/0x150 [ 62.194369][ T4139] cleanup_net+0x511/0xa50 [ 62.198780][ T4139] process_one_work+0x965/0x1690 [ 62.203713][ T4139] worker_thread+0x96/0xe10 [ 62.208238][ T4139] kthread+0x3b5/0x4a0 [ 62.212300][ T4139] ret_from_fork+0x1f/0x30 [ 62.216702][ T4139] [ 62.219025][ T4139] The buggy address belongs to the object at ffff88809e91e800 [ 62.219025][ T4139] which belongs to the cache kmalloc-1k of size 1024 [ 62.233071][ T4139] The buggy address is located 484 bytes inside of [ 62.233071][ T4139] 1024-byte region [ffff88809e91e800, ffff88809e91ec00) [ 62.246426][ T4139] The buggy address belongs to the page: [ 62.252053][ T4139] page:ffffea00027a4780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 62.261148][ T4139] flags: 0xfffe0000000200(slab) [ 62.265998][ T4139] raw: 00fffe0000000200 ffffea0002a4afc8 ffffea00027daf48 ffff8880aa000c40 [ 62.274579][ T4139] raw: 0000000000000000 ffff88809e91e000 0000000100000002 0000000000000000 [ 62.283148][ T4139] page dumped because: kasan: bad access detected [ 62.289547][ T4139] [ 62.291868][ T4139] Memory state around the buggy address: [ 62.297493][ T4139] ffff88809e91e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.305550][ T4139] ffff88809e91e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.313641][ T4139] >ffff88809e91e980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.321695][ T4139] ^ [ 62.328881][ T4139] ffff88809e91ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.336937][ T4139] ffff88809e91ea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.344985][ T4139] ================================================================== [ 62.353037][ T4139] Disabling lock debugging due to kernel taint [ 62.359236][ T4139] Kernel panic - not syncing: panic_on_warn set ... [ 62.365815][ T4139] CPU: 0 PID: 4139 Comm: kworker/u4:6 Tainted: G B 5.7.0-next-20200611-syzkaller #0 [ 62.376468][ T4139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.386624][ T4139] Workqueue: netns cleanup_net [ 62.391370][ T4139] Call Trace: [ 62.394656][ T4139] dump_stack+0x18f/0x20d [ 62.398982][ T4139] ? afs_wake_up_async_call+0x660/0x770 [ 62.404518][ T4139] ? afs_put_call+0xa40/0xa40 [ 62.409197][ T4139] panic+0x2e3/0x75c [ 62.413082][ T4139] ? __warn_printk+0xf3/0xf3 [ 62.417661][ T4139] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 62.423807][ T4139] ? trace_hardirqs_on+0x55/0x220 [ 62.428835][ T4139] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.434368][ T4139] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.439901][ T4139] ? afs_put_call+0xa40/0xa40 [ 62.444571][ T4139] end_report+0x4d/0x53 [ 62.448734][ T4139] kasan_report.cold+0xd/0x37 [ 62.453502][ T4139] ? rcu_read_lock_held_common+0x71/0xa0 [ 62.459128][ T4139] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.464695][ T4139] afs_wake_up_async_call+0x6aa/0x770 [ 62.470058][ T4139] ? afs_close_socket+0x320/0x320 [ 62.475094][ T4139] ? afs_put_call+0xa40/0xa40 [ 62.479762][ T4139] rxrpc_notify_socket+0x1db/0x5d0 [ 62.484885][ T4139] ? afs_put_call+0xa40/0xa40 [ 62.489550][ T4139] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.495955][ T4139] rxrpc_call_completed+0xca/0xf0 [ 62.500971][ T4139] rxrpc_discard_prealloc+0x781/0xab0 [ 62.506342][ T4139] ? lock_sock_nested+0x94/0x110 [ 62.511270][ T4139] rxrpc_listen+0x147/0x360 [ 62.515766][ T4139] afs_close_socket+0x95/0x320 [ 62.520518][ T4139] ? afs_purge_servers+0x16d/0x300 [ 62.525617][ T4139] ? afs_rx_discard_new_call+0x50/0x50 [ 62.531066][ T4139] ? init_wait_var_entry+0x200/0x200 [ 62.536342][ T4139] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.541964][ T4139] ? check_preemption_disabled+0x38/0x220 [ 62.547672][ T4139] afs_net_exit+0x1bc/0x310 [ 62.552189][ T4139] ? afs_net_init+0xe30/0xe30 [ 62.556858][ T4139] ops_exit_list.isra.0+0xa8/0x150 [ 62.561959][ T4139] cleanup_net+0x511/0xa50 [ 62.566368][ T4139] ? unregister_pernet_device+0x70/0x70 [ 62.571906][ T4139] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.577880][ T4139] process_one_work+0x965/0x1690 [ 62.582843][ T4139] ? lock_release+0x800/0x800 [ 62.587511][ T4139] ? pwq_dec_nr_in_flight+0x310/0x310 executing program [ 62.592890][ T4139] ? rwlock_bug.part.0+0x90/0x90 [ 62.597844][ T4139] worker_thread+0x96/0xe10 [ 62.602349][ T4139] ? process_one_work+0x1690/0x1690 [ 62.607542][ T4139] kthread+0x3b5/0x4a0 [ 62.611611][ T4139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.617332][ T4139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.623053][ T4139] ret_from_fork+0x1f/0x30 [ 62.628759][ T4139] Kernel Offset: disabled [ 62.633078][ T4139] Rebooting in 86400 seconds..