[27107] 0 27107 17667 8464 25 4 0 0 syz-executor5 [27131] 0 27131 17634 12723 31 3 0 1000 syz-executor4 [27180] 0 27180 17634 12723 31 3 0 1000 syz-executor4 [27182] 0 27182 17601 8236 25 3 0 0 syz-executor5 INFO: task syz-executor5:10939 blocked for more than 140 seconds. Not tainted 4.14.91+ #3 [27186] 0 27186 17667 8240 31 3 0 0 syz-executor5 [27229] 0 27229 17634 12723 31 3 0 1000 syz-executor4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [27247] 0 27247 17601 8456 25 4 0 0 syz-executor2 [27274] 0 27274 17634 12723 31 3 0 1000 syz-executor4 [27300] 0 27300 17667 8460 25 4 0 0 syz-executor2 [27304] 0 27304 17667 8460 25 4 0 0 syz-executor2 syz-executor5 D29888 10939 1851 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3490 __lock_sock+0x12b/0x220 net/core/sock.c:2237 [27330] 0 27330 17634 12723 31 3 0 1000 syz-executor4 lock_sock_nested+0xe1/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x395/0x2830 net/packet/af_packet.c:3671 [27379] 0 27379 17634 12723 31 3 0 1000 syz-executor4 [27425] 0 27425 17634 12723 31 3 0 1000 syz-executor4 [27496] 0 27496 17634 12723 31 3 0 1000 syz-executor4 [27534] 0 27534 17601 8454 24 3 0 0 syz-executor1 [27538] 0 27538 17634 8456 24 3 0 0 syz-executor1 [27541] 0 27541 17634 12723 31 3 0 1000 syz-executor4 [27543] 0 27543 17634 8462 26 4 0 0 syz-executor5 [27583] 0 27583 17634 12723 31 3 0 1000 syz-executor4 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1761: #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 2 locks held by udevd/10942: #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:6178 ============================================= [27635] 0 27635 17634 12723 31 3 0 1000 syz-executor4 [27690] 0 27690 17634 12723 31 3 0 1000 syz-executor4 [27734] 0 27734 17667 8476 25 4 0 0 syz-executor1 [27740] 0 27740 17667 8476 25 4 0 0 syz-executor1 [27755] 0 27755 17634 12723 31 3 0 1000 syz-executor4 [27810] 0 27810 17601 8233 25 3 0 0 syz-executor2 [27815] 0 27815 17634 12723 31 3 0 1000 syz-executor4 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.91+ #3 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: 32 Comm: kswapd0 Not tainted 4.14.91+ #3 task: ffff8881da2f2f00 task.stack: ffff8881d9958000 RIP: 0010:__lock_acquire+0x184/0x3fa0 kernel/locking/lockdep.c:3392 RSP: 0000:ffff8881d995f770 EFLAGS: 00000016 RAX: ffffffff8457e9c0 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1103870a39c RSI: 0000000000000000 RDI: ffff8881c3851ce0 RBP: ffff8881d995f930 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8881c3851cd8 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881da2f2f00 FS: 0000000000000000(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe20733a9c2 CR3: 0000000112c26004 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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 spin_lock include/linux/spinlock.h:317 [inline] __list_lru_count_one mm/list_lru.c:171 [inline] list_lru_count_one+0x7f/0x1d0 mm/list_lru.c:182 list_lru_shrink_count include/linux/list_lru.h:117 [inline] super_cache_count+0x188/0x2b0 fs/super.c:144 do_shrink_slab mm/vmscan.c:328 [inline] shrink_slab.part.0+0x251/0xa40 mm/vmscan.c:504 shrink_slab mm/vmscan.c:468 [inline] shrink_node+0x8b5/0xbf0 mm/vmscan.c:2667 kswapd_shrink_node mm/vmscan.c:3298 [inline] balance_pgdat mm/vmscan.c:3404 [inline] kswapd+0x94d/0x14e0 mm/vmscan.c:3623 kthread+0x310/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Code: 89 44 24 70 89 4c 24 78 e8 0a 9d ff ff 8b 4c 24 78 48 85 c0 44 8b 44 24 70 44 8b 4c 24 68 0f 84 5e 07 00 00 f0 ff 80 38 01 00 00 <49> 8d b7 28 08 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 74 24 [27820] 0 27820 17733 9301 25 3 0 0 syz-executor2