[31649] 0 31649 18212 8975 27 4 0 0 syz-executor5 [31652] 0 31652 18113 8744 26 3 0 0 syz-executor1 [31659] 0 31659 18212 8975 27 4 0 0 syz-executor5 [31695] 0 31695 18113 8968 27 4 0 0 syz-executor1 [31705] 0 31705 18113 8744 26 3 0 0 syz-executor1 INFO: task syz-executor0:9777 blocked for more than 140 seconds. Not tainted 4.14.94+ #10 [31730] 0 31730 18113 8969 27 4 0 0 syz-executor1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [31732] 0 31732 18113 8969 26 4 0 0 syz-executor5 syz-executor0 D30528 9777 1827 0x00000004 [31734] 0 31734 18113 8744 26 3 0 0 syz-executor1 Call Trace: [31743] 0 31743 18113 8969 27 4 0 0 syz-executor1 schedule+0x92/0x1c0 kernel/sched/core.c:3490 [31754] 0 31754 18113 8744 26 3 0 0 syz-executor1 [31758] 0 31758 18113 8968 26 4 0 0 syz-executor4 __lock_sock+0x12b/0x220 net/core/sock.c:2237 [31773] 0 31773 18113 8744 26 3 0 0 syz-executor1 [31778] 0 31778 18146 8971 27 4 0 0 syz-executor5 [31786] 0 31786 18146 8971 27 4 0 0 syz-executor5 [31788] 0 31788 18113 8969 27 4 0 0 syz-executor1 [31790] 0 31790 18113 8744 26 3 0 0 syz-executor1 [31800] 0 31800 18113 8969 27 4 0 0 syz-executor1 [31802] 0 31802 18113 8744 26 3 0 0 syz-executor1 lock_sock_nested+0xe1/0x100 net/core/sock.c:2761 lock_sock include/net/sock.h:1456 [inline] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3675 [31809] 0 31809 18146 8971 27 4 0 0 syz-executor5 [31815] 0 31815 18113 8744 26 3 0 0 syz-executor1 [31835] 0 31835 18113 8969 27 4 0 0 syz-executor1 [31837] 0 31837 18113 8969 26 4 0 0 syz-executor5 [31865] 0 31865 18113 8970 26 4 0 0 syz-executor4 [31884] 0 31884 18146 8971 27 4 0 0 syz-executor5 [31890] 0 31890 18113 8968 27 4 0 0 syz-executor1 [31891] 0 31891 18113 8970 26 4 0 0 syz-executor4 [31894] 0 31894 18113 8744 26 3 0 0 syz-executor1 [31911] 0 31911 18113 8969 27 4 0 0 syz-executor1 [31915] 0 31915 18113 8744 26 3 0 0 syz-executor1 [31929] 0 31929 18113 8969 27 4 0 0 syz-executor1 [31939] 0 31939 18113 8744 26 3 0 0 syz-executor1 Showing all locks held in the system: 2 locks held by init/1: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6184 1 lock held by khungtaskd/23: [31961] 0 31961 18212 8975 27 4 0 0 syz-executor5 #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by rs:main Q:Reg/1618: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 [31965] 0 31965 18113 8744 26 3 0 0 syz-executor1 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6184 2 locks held by rsyslogd/1620: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6184 2 locks held by getty/1748: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-executor2/10052: [32020] 0 32020 18146 8971 27 4 0 0 syz-executor5 #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1592 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x364/0x1520 fs/ext4/inode.c:250 5 locks held by kworker/u4:8/6150: #0: ("writeback"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 #2: (&type->s_umount_key#34){++++}, at: [] trylock_super+0x1b/0xe0 fs/super.c:402 #3: (&sbi->s_journal_flag_rwsem){.+.+}, at: [] do_writepages+0xe5/0x280 mm/page-writeback.c:2341 #4: (&ei->i_data_sem){++++}, at: [] ext4_map_blocks+0x728/0x1580 fs/ext4/inode.c:629 1 lock held by syz-executor0/9775: #0: (sk_lock-AF_PACKET){+.+.}, at: [] lock_sock include/net/sock.h:1456 [inline] #0: (sk_lock-AF_PACKET){+.+.}, at: [] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3675 2 locks held by init/9817: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x271/0xb80 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6184 ============================================= [32022] 0 32022 18113 8969 27 4 0 0 syz-executor1 [32038] 0 32038 18146 8972 27 4 0 0 syz-executor5 [32107] 0 32107 18113 8969 26 4 0 0 syz-executor5 [32114] 0 32114 18113 8744 26 3 0 0 syz-executor1 [32120] 0 32120 18179 8974 26 4 0 1000 syz-executor0 [32134] 0 32134 18113 8744 26 3 0 0 syz-executor1 [32135] 0 32135 18146 8971 27 4 0 0 syz-executor5 [32149] 0 32149 18113 8969 27 4 0 0 syz-executor1 [32152] 0 32152 18113 8744 26 3 0 0 syz-executor1 [32165] 0 32165 18113 8744 26 3 0 0 syz-executor1 [32184] 0 32184 18113 8969 27 4 0 0 syz-executor1 [32187] 0 32187 18113 8744 26 3 0 0 syz-executor1 NMI backtrace for cpu 0 [32203] 0 32203 18113 8744 26 3 0 0 syz-executor1 [32209] 0 32209 18113 8969 26 4 0 0 syz-executor5 [32211] 0 32211 18113 8744 26 3 0 0 syz-executor1 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.94+ #10 [32228] 0 32228 18113 8969 27 4 0 0 syz-executor1 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 [32229] 0 32229 18113 8744 26 3 0 0 syz-executor1 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 [32254] 0 32254 18146 8971 27 4 0 0 syz-executor5 [32257] 0 32257 18146 8748 25 3 0 0 syz-executor3 [32261] 0 32261 18113 8969 27 4 0 0 syz-executor1 Sending NMI from CPU 0 to CPUs 1: [32267] 0 32267 18113 8744 26 3 0 0 syz-executor1 NMI backtrace for cpu 1 CPU: 1 PID: 9816 Comm: init Not tainted 4.14.94+ #10 task: ffff88815ccdc680 task.stack: ffff88807ec70000 RIP: 0010:check_preemption_disabled+0x0/0x1f0 lib/smp_processor_id.c:13 RSP: 0000:ffff8881dbb07b10 EFLAGS: 00000006 RAX: ffff88815ccdc680 RBX: 000000000001e560 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff8d74ffc0 RDI: ffffffff8d750000 RBP: ffffffff8dcbef80 R08: 0000000000000000 R09: 00000000000a2025 R10: ffff88815ccdcfc8 R11: 0000000000000001 R12: 0000000000007035 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881dbb2a218 FS: 00007f76385527a0(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7637beefe0 CR3: 000000006fd02005 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: cpuacct_charge+0x155/0x350 kernel/sched/cpuacct.c:361 enqueue_entity kernel/sched/fair.c:3960 [inline] enqueue_task_fair+0xef8/0x66e0 kernel/sched/fair.c:5248 Code: ff 4c 89 e7 e8 42 ec 99 ff e9 17 f3 ff ff e8 d8 eb 99 ff e9 eb f2 ff ff e8 3e c7 54 ff 48 8b 3c 24 e8 a5 eb 99 ff e9 c6 f7 ff ff <41> 57 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 e8 fb fc 77 ff