[18057] 0 18057 18211 8998 26 4 0 0 syz-executor.2 [18073] 0 18073 18211 13326 32 3 0 0 syz-executor.4 [18088] 0 18088 18261 13343 33 3 0 0 syz-executor.4 [18129] 0 18129 18211 8993 26 4 0 0 syz-executor.2 INFO: task syz-executor.5:12707 blocked for more than 140 seconds. Not tainted 4.14.131+ #13 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [18135] 0 18135 18211 13326 32 3 0 0 syz-executor.4 syz-executor.5 D29728 12707 1865 0x00000004 Call Trace: [18140] 0 18140 18308 13390 33 3 0 0 syz-executor.4 [18194] 0 18194 18178 13294 32 3 0 0 syz-executor.4 [18200] 0 18200 18178 8999 26 4 0 0 syz-executor.2 schedule+0x92/0x1c0 kernel/sched/core.c:3498 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [18215] 0 18215 18209 13292 32 3 0 0 syz-executor.4 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 lock_sock include/net/sock.h:1462 [inline] packet_setsockopt+0x33b/0x2720 net/packet/af_packet.c:3867 [18247] 0 18247 18211 13326 32 3 0 0 syz-executor.4 [18248] 0 18248 18178 8972 26 4 0 1000 syz-executor.5 [18280] 0 18280 18275 13390 33 3 0 0 syz-executor.4 [18332] 0 18332 18211 13326 32 3 0 0 syz-executor.4 [18355] 0 18355 18275 13357 33 3 0 0 syz-executor.4 INFO: task syz-executor.5:12711 blocked for more than 140 seconds. [18376] 0 18376 18211 13326 32 3 0 0 syz-executor.4 Not tainted 4.14.131+ #13 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [18378] 0 18378 18275 13357 33 3 0 0 syz-executor.4 [18420] 0 18420 18211 13326 32 3 0 0 syz-executor.4 syz-executor.5 D29872 12711 1865 0x00000004 Call Trace: [18441] 0 18441 18242 13357 33 3 0 0 syz-executor.4 schedule+0x92/0x1c0 kernel/sched/core.c:3498 [18444] 0 18444 18201 8974 27 4 0 0 syz-executor.1 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [18504] 0 18504 18211 13326 32 3 0 0 syz-executor.4 [18529] 0 18529 18275 13390 33 3 0 0 syz-executor.4 lock_sock_nested+0xe1/0x100 net/core/sock.c:2762 lock_sock include/net/sock.h:1462 [inline] packet_setsockopt+0x33b/0x2720 net/packet/af_packet.c:3867 [18573] 0 18573 18178 13294 32 3 0 0 syz-executor.4 [18611] 0 18611 18242 13358 33 3 0 0 syz-executor.4 [18657] 0 18657 18211 8973 26 4 0 0 syz-executor.1 [18662] 0 18662 18211 13326 32 3 0 0 syz-executor.4 [18671] 0 18671 18275 13357 33 3 0 0 syz-executor.4 [18672] 0 18672 18211 8973 26 4 0 0 syz-executor.1 Showing all locks held in the system: 1 lock held by init/1: #0: (&ei->i_mmap_sem){++++}, at: [<000000009f744cc0>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by kworker/u4:0/5: #0: ("events_unbound"){+.+.}, at: [<000000001c427f7c>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105 #1: ((&sub_info->work)){+.+.}, at: [<00000000515999b5>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.?}, at: [<00000000ef121d31>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 1 lock held by rs:main Q:Reg/1634: #0: (&ei->i_mmap_sem){++++}, at: [<000000009f744cc0>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 1 lock held by rsyslogd/1636: #0: (&ei->i_mmap_sem){++++}, at: [<000000009f744cc0>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by getty/1764: #0: (&tty->ldisc_sem){++++}, at: [<0000000032b9dbc3>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<0000000027410b24>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 2 locks held by kworker/u4:28/5578: #0: ("events_unbound"){+.+.}, at: [<000000001c427f7c>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105 #1: ((&sub_info->work)){+.+.}, at: [<00000000515999b5>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109 2 locks held by kworker/u4:11/335: #0: ("events_unbound"){+.+.}, at: [<000000001c427f7c>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105 #1: ((&sub_info->work)){+.+.}, at: [<00000000515999b5>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109 3 locks held by kworker/1:2/490: #0: ("%s"("ipv6_addrconf")){+.+.}, at: [<000000001c427f7c>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105 #1: ((addr_chk_work).work){+.+.}, at: [<00000000515999b5>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109 #2: (rtnl_mutex){+.+.}, at: [<00000000f38649d2>] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4431 1 lock held by syz-executor.3/12098: #0: (&sig->cred_guard_mutex){+.+.}, at: [<00000000787b7500>] prepare_bprm_creds+0x51/0x110 fs/exec.c:1389 1 lock held by modprobe/12712: #0: (&ei->i_mmap_sem){++++}, at: [<000000009f744cc0>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 ============================================= [18681] 0 18681 18145 8969 26 4 0 0 syz-executor.1 [18700] 0 18700 18178 8974 26 4 0 0 syz-executor.1 [18726] 0 18726 18211 13326 32 3 0 0 syz-executor.4 [18755] 0 18755 18275 13357 33 3 0 0 syz-executor.4 [18794] 0 18794 18145 8736 24 3 0 0 syz-executor.2 [18806] 0 18806 18211 13326 32 3 0 0 syz-executor.4 [18810] 0 18810 18178 8747 25 3 0 0 syz-executor.2 [18840] 0 18840 18275 13390 33 3 0 0 syz-executor.4 [18866] 0 18866 18211 13326 32 3 0 0 syz-executor.4 [18872] 0 18872 18277 13392 33 3 0 0 syz-executor.4 [18948] 0 18948 18211 13326 32 3 0 0 syz-executor.4 [19027] 0 19027 18275 13357 33 3 0 0 syz-executor.4 [19082] 0 19082 18178 8972 26 4 0 1000 syz-executor.5 [19169] 0 19169 18211 13326 32 3 0 0 syz-executor.4 [19189] 0 19189 18275 13390 33 3 0 0 syz-executor.4 [19231] 0 19231 18211 13326 32 3 0 0 syz-executor.4 [19236] 0 19236 18275 13390 33 3 0 0 syz-executor.4 [19290] 0 19290 18211 13326 32 3 0 0 syz-executor.4 [19312] 0 19312 18275 13357 33 3 0 0 syz-executor.4 [19358] 0 19358 18211 13326 32 3 0 0 syz-executor.4 [19399] 0 19399 18275 13390 33 3 0 0 syz-executor.4 [19435] 0 19435 18211 13326 32 3 0 0 syz-executor.4 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.131+ #13 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 12579 Comm: syz-executor.1 Not tainted 4.14.131+ #13 task: 0000000040ec68e1 task.stack: 0000000010381f95 RIP: 0010:mark_lock+0x32/0xfa0 kernel/locking/lockdep.c:3157 RSP: 0000:ffff888059396a28 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000003 RDX: 1ffff1103a684cca RSI: ffff8881d3426630 RDI: ffff8881d3425e00 RBP: ffff8881d3426630 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008 R13: ffff8881d3426650 R14: ffff8881d3425e00 R15: 0000000000000003 FS: 00007fb6132be700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe937de5a20 CR3: 0000000136426006 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: mark_held_locks+0xa6/0xf0 kernel/locking/lockdep.c:2850 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2871 [inline] trace_hardirqs_on_caller+0x25b/0x540 kernel/locking/lockdep.c:2926 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x54/0x70 kernel/locking/spinlock.c:192 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] __remove_mapping+0x422/0x560 mm/vmscan.c:768 shrink_page_list+0x1870/0x32b0 mm/vmscan.c:1321 shrink_inactive_list+0x39a/0x1170 mm/vmscan.c:1826 shrink_list mm/vmscan.c:2179 [inline] shrink_node_memcg+0x622/0x1350 mm/vmscan.c:2444 shrink_node+0x2fa/0xbf0 mm/vmscan.c:2636 shrink_zones mm/vmscan.c:2818 [inline] do_try_to_free_pages+0x350/0xd80 mm/vmscan.c:2876 try_to_free_pages+0x20a/0x6c0 mm/vmscan.c:3082 __perform_reclaim mm/page_alloc.c:3601 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3623 [inline] __alloc_pages_slowpath mm/page_alloc.c:4010 [inline] __alloc_pages_nodemask+0xac8/0x22e0 mm/page_alloc.c:4219 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] pagecache_get_page+0x246/0x790 mm/filemap.c:1494 find_or_create_page include/linux/pagemap.h:327 [inline] ext4_mb_load_buddy_gfp+0x966/0x1210 fs/ext4/mballoc.c:1170 ext4_free_blocks+0x78f/0x2290 fs/ext4/mballoc.c:4891 ext4_remove_blocks fs/ext4/extents.c:2586 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2742 [inline] ext4_ext_remove_space+0x2022/0x3800 fs/ext4/extents.c:2975 ext4_ext_truncate+0x19b/0x1e0 fs/ext4/extents.c:4669 ext4_truncate+0x9e2/0x11e0 fs/ext4/inode.c:4459 ext4_evict_inode+0x6d9/0x1540 fs/ext4/inode.c:289 evict+0x2cb/0x5f0 fs/inode.c:554 iput_final fs/inode.c:1516 [inline] iput fs/inode.c:1543 [inline] iput+0x36f/0x8d0 fs/inode.c:1528 dentry_unlink_inode+0x25f/0x320 fs/dcache.c:387 __dentry_kill+0x325/0x560 fs/dcache.c:591 dentry_kill fs/dcache.c:632 [inline] dput.part.0+0x4b5/0x710 fs/dcache.c:847 dput+0x1b/0x30 fs/dcache.c:811 path_put+0x2d/0x60 fs/namei.c:516 free_fs_struct+0x1e/0x60 fs/fs_struct.c:91 exit_fs+0xdc/0x110 fs/fs_struct.c:109 do_exit+0x8e0/0x2960 kernel/exit.c:870 Code: fc ff df 41 57 89 d1 41 89 d7 41 56 49 89 fe 41 55 4c 8d 6e 20 4c 89 ea 41 54 41 bc 01 00 00 00 55 48 c1 ea 03 41 d3 e4 48 89 f5 <53> 48 83 ec 18 0f b6 04 02 84 c0 74 08 3c 01 0f 8e 4c 07 00 00 [19440] 0 19440 18275 13357 33 3 0 0 syz-executor.4