[11420] 0 11420 18211 18174 41 4 0 0 syz-executor.4 [11446] 0 11446 18178 13263 32 3 0 0 syz-executor.2 [11495] 0 11495 18178 13263 32 3 0 0 syz-executor.2 [11499] 0 11499 18211 15335 36 4 0 0 syz-executor.4 [11500] 0 11500 18211 18145 41 4 0 0 syz-executor.2 INFO: task syz-executor.5:14976 blocked for more than 140 seconds. [11528] 0 11528 18211 18175 41 4 0 0 syz-executor.4 Not tainted 4.14.131+ #13 [11555] 0 11555 18178 13263 32 3 0 0 syz-executor.2 [11558] 0 11558 18211 18144 41 4 0 0 syz-executor.2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11604] 0 11604 18178 13263 32 3 0 0 syz-executor.2 [11609] 0 11609 18244 15336 36 4 0 0 syz-executor.4 [11684] 0 11684 18178 13263 32 3 0 0 syz-executor.2 [11693] 0 11693 18244 15336 36 4 0 0 syz-executor.4 [11733] 0 11733 18244 15336 36 4 0 0 syz-executor.4 [11751] 0 11751 18178 13263 32 3 0 0 syz-executor.2 [11771] 0 11771 18211 18175 41 4 0 0 syz-executor.4 [11797] 0 11797 18211 18174 41 4 0 0 syz-executor.4 [11799] 0 11799 18178 13263 32 3 0 0 syz-executor.2 [11833] 0 11833 18244 15336 36 4 0 0 syz-executor.4 syz-executor.5 D [11835] 0 11835 18145 8747 26 4 0 0 syz-executor.0 [11847] 0 11847 18211 8751 27 4 0 0 syz-executor.0 [11857] 0 11857 18178 13263 32 3 0 0 syz-executor.2 30400 14976 3732 0x00000004 [11891] 0 11891 18244 8995 26 4 0 0 syz-executor.4 [11902] 0 11902 18178 13263 32 3 0 0 syz-executor.2 [11962] 0 11962 18178 13263 32 3 0 0 syz-executor.2 [11965] 0 11965 18211 18145 41 4 0 0 syz-executor.2 [12006] 0 12006 18244 15336 36 4 0 0 syz-executor.4 [12011] 0 12011 18178 13263 32 3 0 0 syz-executor.2 [12050] 0 12050 18247 15336 36 4 0 0 syz-executor.4 [12054] 0 12054 18178 13263 32 3 0 0 syz-executor.2 Call Trace: [12057] 0 12057 18178 18143 41 4 0 0 syz-executor.2 [12089] 0 12089 18211 9022 26 4 0 0 syz-executor.4 [12098] 0 12098 18178 13263 32 3 0 0 syz-executor.2 [12105] 0 12105 18178 13263 32 3 0 0 syz-executor.2 [12145] 0 12145 18178 13263 32 3 0 0 syz-executor.2 [12201] 0 12201 18178 13263 32 3 0 0 syz-executor.2 schedule+0x92/0x1c0 kernel/sched/core.c:3498 __lock_sock+0x12b/0x220 net/core/sock.c:2238 [12258] 0 12258 18244 15336 36 4 0 0 syz-executor.4 [12276] 0 12276 18178 13263 32 3 0 0 syz-executor.2 [12282] 0 12282 18178 15777 38 4 0 0 syz-executor.2 [12283] 0 12283 18244 15337 37 4 0 0 syz-executor.4 [12303] 0 12303 18145 8744 25 3 0 0 syz-executor.3 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 [12304] 0 12304 18145 8744 25 3 0 0 syz-executor.3 [12312] 0 12312 18178 18143 41 4 0 0 syz-executor.4 [12344] 0 12344 18178 13263 32 3 0 0 syz-executor.2 [12349] 0 12349 18211 18144 41 4 0 0 syz-executor.2 [12397] 0 12397 18178 13263 32 3 0 0 syz-executor.2 [12418] 0 12418 18178 8747 24 3 0 0 syz-executor.4 [12419] 0 12419 18178 8747 24 3 0 0 syz-executor.4 [12443] 0 12443 18178 13263 33 3 0 0 syz-executor.3 [12450] 0 12450 18178 18143 42 4 0 0 syz-executor.3 [12464] 0 12464 18178 13263 32 3 0 0 syz-executor.2 Showing all locks held in the system: [12497] 0 12497 18178 13263 33 3 0 0 syz-executor.3 2 locks held by kworker/u4:0/5: [12505] 0 12505 18178 18143 42 4 0 0 syz-executor.3 [12519] 0 12519 18244 15336 36 4 0 0 syz-executor.4 #0: ("events_unbound"){+.+.}, at: [<000000004b69fb8e>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105 #1: [12528] 0 12528 18178 13263 33 3 0 0 syz-executor.3 ((&sub_info->work) [12541] 0 12541 18178 13263 32 3 0 0 syz-executor.2 ){+.+.} [12595] 0 12595 18178 13263 32 3 0 0 syz-executor.2 , at: [<00000000bff9efb1>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109 [12642] 0 12642 18244 15336 36 4 0 0 syz-executor.4 1 lock held by khungtaskd/23: [12660] 0 12660 18178 13263 32 3 0 0 syz-executor.2 #0: (tasklist_lock){.+.?}, at: [<000000006f56a616>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 1 lock held by rs:main Q:Reg/1629: [12719] 0 12719 18178 13263 32 3 0 0 syz-executor.2 #0: [12722] 0 12722 18211 18144 41 4 0 0 syz-executor.2 [12771] 0 12771 18178 13263 32 3 0 0 syz-executor.2 (&ei->i_mmap_sem){++++}, at: [<00000000125a51b3>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 1 lock held by rsyslogd/1631: [12843] 0 12843 18178 13263 32 3 0 0 syz-executor.2 #0: (&ei->i_mmap_sem){++++}, at: [<00000000125a51b3>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 1 lock held by cron/1682: #0: (&ei->i_mmap_sem){++++}, at: [<00000000125a51b3>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by getty/1759: #0: [12846] 0 12846 18178 18143 41 4 0 0 syz-executor.2 (&tty->ldisc_sem){++++}, at: [<000000008037c3f8>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: [12880] 0 12880 18178 10393 27 3 0 0 syz-executor.4 ( [12905] 0 12905 18178 13263 32 3 0 0 syz-executor.2 &ldata->atomic_read_lock){+.+.}, at: [<000000007ce0c9cf>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-fuzzer/1784: #0: (&ei->i_mmap_sem){++++}, at: [<00000000125a51b3>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 1 lock held by syz-fuzzer/1785: #0: (&ei->i_mmap_sem){++++} [12915] 0 12915 18211 18144 41 4 0 0 syz-executor.2 , at: [<00000000125a51b3>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 1 lock held by syz-fuzzer/1798: #0: [12944] 0 12944 18244 8977 26 4 0 0 syz-executor.5 ( [12961] 0 12961 18244 15336 36 4 0 0 syz-executor.4 &ei->i_mmap_sem){++++}, at: [<00000000125a51b3>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 2 locks held by kworker/u4:7/1580: [12964] 0 12964 18178 13263 32 3 0 0 syz-executor.2 #0: [12977] 0 12977 18211 18144 41 4 0 0 syz-executor.2 ("events_unbound"){+.+.}, at: [<000000004b69fb8e>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105 #1: [13003] 0 13003 18178 13263 32 3 0 0 syz-executor.2 ( [13016] 0 13016 18178 15275 37 4 0 0 syz-executor.2 (&sub_info->work)){+.+.}, at: [<00000000bff9efb1>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109 1 lock held by syz-executor.5/14968: [13017] 0 13017 18211 18174 41 4 0 0 syz-executor.4 #0: [13018] 0 13018 18211 18174 41 4 0 0 syz-executor.4 ( [13066] 0 13066 18244 15336 36 4 0 0 syz-executor.4 sk_lock-AF_PACKET){+.+.}, at: [<00000000dd0dd9fd>] lock_sock include/net/sock.h:1462 [inline] sk_lock-AF_PACKET){+.+.}, at: [<00000000dd0dd9fd>] packet_setsockopt+0xe19/0x2720 net/packet/af_packet.c:3679 1 lock held by modprobe/14973: #0: (&ei->i_mmap_sem){++++}, at: [<00000000125a51b3>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6178 ============================================= NMI backtrace for cpu 1 [13069] 0 13069 18178 13263 32 3 0 0 syz-executor.2 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.131+ #13 [13121] 0 13121 18178 13263 32 3 0 0 syz-executor.2 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 [13125] 0 13125 18211 18144 41 4 0 0 syz-executor.2 [13145] 0 13145 18178 8989 26 5 0 0 syz-executor.0 Sending NMI from CPU 1 to CPUs 0: [13183] 0 13183 18178 13263 32 3 0 0 syz-executor.2 NMI backtrace for cpu 0 CPU: 0 PID: 1 Comm: init Not tainted 4.14.131+ #13 task: 000000004d39ae3d task.stack: 00000000cff775f2 RIP: 0010:hlock_class kernel/locking/lockdep.c:148 [inline] RIP: 0010:mark_lock+0x4b/0xfa0 kernel/locking/lockdep.c:3164 RSP: 0000:ffff8881da9df3a0 EFLAGS: 00000046 RAX: 0000000000000007 RBX: ffff8881da9d091a RCX: 0000000000000008 RDX: 1ffff1103b53a123 RSI: ffff8881da9d08f8 RDI: ffff8881da9d0000 RBP: ffff8881da9d08f8 R08: 0000000000000001 R09: 00000000000c0007 R10: ffff8881da9d08f8 R11: 1ffff1103b53a11e R12: 0000000000000100 R13: ffff8881da9d0918 R14: ffff8881da9d0000 R15: 0000000000000008 FS: 00007fea1fb967a0(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff6c3406d80 CR3: 00000001d5bf0003 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __lock_acquire+0x56a/0x3fa0 kernel/locking/lockdep.c:3448 lock_acquire+0x10f/0x380 kernel/locking/lockdep.c:3991 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 console_lock_spinning_enable kernel/printk/printk.c:1577 [inline] console_unlock+0x2b9/0xc60 kernel/printk/printk.c:2388 vprintk_emit+0x128/0x330 kernel/printk/printk.c:1917 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0xba/0xed kernel/printk/printk.c:1990 dump_tasks mm/oom_kill.c:396 [inline] dump_header+0x6d8/0x775 mm/oom_kill.c:428 oom_kill_process.cold+0x10/0xc4d mm/oom_kill.c:861 Code: 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 0f b7 45 20 <66> a9 ff 1f 74 7d 48 ba 00 00 00 00 00 fc ff df 4c 89 e9 48 c1