INFO: task syz-executor.1:9915 can't die for more than 143 seconds. syz-executor.1 R running task 22624 9915 8708 0x00004006 Call Trace: Showing all locks held in the system: 1 lock held by khungtaskd/1045: #0: 00000000000cfc34 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5262 1 lock held by rsyslogd/8577: #0: 00000000c9598b6e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/8667: #0: 000000008cd3b8d3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001bece10b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8668: #0: 000000002ce473c6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000003bed9a97 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8669: #0: 00000000e1d146ff (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000881fb2e9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8670: #0: 00000000f8555a1d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000935ca039 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8671: #0: 0000000081734f6a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000050b1c228 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8672: #0: 00000000fa67e7b5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000009cf85fed (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8673: #0: 00000000c35328a7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000015999b3c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.1/9915: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1045 Comm: khungtaskd Not tainted 5.2.0-rc3-next-20190607 #11 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:249 [inline] watchdog+0xb88/0x12b0 kernel/hung_task.c:333 kthread+0x354/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.570 msecs NMI backtrace for cpu 0 CPU: 0 PID: 9915 Comm: syz-executor.1 Not tainted 5.2.0-rc3-next-20190607 #11 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:194 [inline] RIP: 0010:trace_hrtimer_expire_entry include/trace/events/timer.h:232 [inline] RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1388 [inline] RIP: 0010:__hrtimer_run_queues+0x8dc/0xdd0 kernel/time/hrtimer.c:1451 Code: 1a 69 0f 00 e8 96 f1 9e ff e9 06 f9 ff ff e8 0b 69 0f 00 65 ff 05 cc 88 a0 7e 48 c7 c0 e8 8c 9d 89 48 c1 e8 03 42 80 3c 38 00 <0f> 85 a3 04 00 00 48 8b 05 0f 18 3c 08 e8 d2 39 fc ff 31 ff 89 c3 RSP: 0018:ffff8880ae809368 EFLAGS: 00000046 RAX: 1ffffffff133b19d RBX: 0000000000000001 RCX: ffffffff81616f12 RDX: 0000000000010100 RSI: ffffffff816174b5 RDI: 0000000000000001 RBP: ffff8880ae809458 R08: ffff88805c026180 R09: ffffed1015d04da1 R10: ffffed1015d04da0 R11: ffff8880ae826d03 R12: ffff8880ae826d80 R13: 000001b9aa846017 R14: ffff8880524b4518 R15: dffffc0000000000 FS: 00007f810ee8e700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000a2cdb000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1066 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:43 [inline] RIP: 0010:update_stack_state+0x1c1/0x5f0 arch/x86/kernel/unwind_frame.c:239 Code: 00 4c 89 e8 48 c1 e8 03 42 0f b6 0c 38 4c 89 e8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 3d 03 00 00 41 8b 45 00 85 c0 74 8f <41> 80 3c 24 00 0f 85 5b 03 00 00 49 8d 7d 10 49 8b 4d 08 48 89 fe RSP: 0018:ffff8880ae809608 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: ffff8880ae809720 RCX: 1ffff11015d012ed RDX: ffff8880ae809738 RSI: ffff8880ae809720 RDI: ffff8880ae809768 RBP: ffff8880ae8096d0 R08: ffff88805c026180 R09: ffff8880ae809730 R10: ffffed1015d012f1 R11: ffff8880ae80978f R12: ffffed1015d012e7 R13: ffff8880ae809730 R14: 1ffff11015d012c9 R15: dffffc0000000000 __unwind_start+0x189/0x3d0 arch/x86/kernel/unwind_frame.c:424 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5e/0xf0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123 save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:489 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497 slab_post_alloc_hook mm/slab.h:444 [inline] slab_alloc mm/slab.c:3320 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3482 skb_clone+0x154/0x3d0 net/core/skbuff.c:1347 frame_get_tagged_skb net/hsr/hsr_forward.c:187 [inline] hsr_forward_do net/hsr/hsr_forward.c:273 [inline] hsr_forward_skb+0x1149/0x1d30 net/hsr/hsr_forward.c:361 send_hsr_supervision_frame+0x8bf/0xf20 net/hsr/hsr_device.c:307 hsr_announce+0x12f/0x3b0 net/hsr/hsr_device.c:335 call_timer_fn+0x193/0x720 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x66f/0x1740 kernel/time/timer.c:1698 __do_softirq+0x25c/0x94c kernel/softirq.c:293 invoke_softirq kernel/softirq.c:374 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:414 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1068 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:__sanitizer_cov_trace_pc+0x2b/0x50 kernel/kcov.c:105 Code: 48 89 e5 48 8b 75 08 65 48 8b 04 25 c0 fd 01 00 65 8b 15 b0 1f 91 7e 81 e2 00 01 1f 00 75 2b 8b 90 f0 12 00 00 83 fa 02 75 20 <48> 8b 88 f8 12 00 00 8b 80 f4 12 00 00 48 8b 11 48 83 c2 01 48 39 RSP: 0018:ffff88805f8bf2b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88805c026180 RBX: 0000000000035e40 RCX: 1ffffffff1342976 RDX: 0000000000000002 RSI: ffffffff833640f0 RDI: ffff88805c026a0c RBP: ffff88805f8bf2b8 R08: 0000000000000000 R09: ffffffff89a14bb0 R10: ffff88805c026a10 R11: ffff88805c026180 R12: ffffea0005b10080 R13: ffffea0005b10080 R14: 0000000000112cc0 R15: ffff8880a972b400 check_preemption_disabled lib/smp_processor_id.c:14 [inline] debug_smp_processor_id+0x10/0x2b0 lib/smp_processor_id.c:57 rcu_dynticks_curr_cpu_in_eqs+0x17/0xb0 kernel/rcu/tree.c:290 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:872 rcu_read_lock+0x43/0x70 include/linux/rcupdate.h:594 get_mem_cgroup_from_mm+0x1e/0x2b0 mm/memcontrol.c:922 mem_cgroup_try_charge+0x238/0x5e0 mm/memcontrol.c:6071 __add_to_page_cache_locked+0x425/0xe70 mm/filemap.c:839 add_to_page_cache_lru+0x1cb/0x760 mm/filemap.c:916 mpage_readpages+0x344/0x630 fs/mpage.c:399 blkdev_readpages+0x2d/0x40 fs/block_dev.c:632 read_pages+0x108/0x540 mm/readahead.c:126 __do_page_cache_readahead+0x4c6/0x5c0 mm/readahead.c:212 ra_submit mm/internal.h:62 [inline] do_sync_mmap_readahead mm/filemap.c:2416 [inline] filemap_fault+0x141a/0x2850 mm/filemap.c:2502 __do_fault+0x111/0x4d0 mm/memory.c:3122 do_read_fault mm/memory.c:3532 [inline] do_fault mm/memory.c:3661 [inline] handle_pte_fault mm/memory.c:3892 [inline] __handle_mm_fault+0x2c67/0x3eb0 mm/memory.c:4016 handle_mm_fault+0x3b7/0xa90 mm/memory.c:4053 do_user_addr_fault arch/x86/mm/fault.c:1455 [inline] __do_page_fault+0x5ef/0xda0 arch/x86/mm/fault.c:1521 do_page_fault+0x71/0x57d arch/x86/mm/fault.c:1552 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1156 RIP: 0010:__get_user_8+0x21/0x2b arch/x86/lib/getuser.S:95 Code: 1f 00 c3 66 0f 1f 44 00 00 48 83 c0 07 72 25 65 48 8b 14 25 c0 fd 01 00 48 3b 82 18 14 00 00 73 13 48 19 d2 48 21 d0 0f 1f 00 <48> 8b 50 f9 31 c0 0f 1f 00 c3 31 d2 48 c7 c0 f2 ff ff ff 0f 1f 00 RSP: 0018:ffff88805f8bfee8 EFLAGS: 00010206 RAX: 0000000020000047 RBX: 0000000000000101 RCX: ffffc90007ff6000 RDX: ffffffffffffffff RSI: ffffffff819a30f3 RDI: 0000000000000286 RBP: ffff88805f8bff10 R08: ffff88805c026180 R09: 0000000000000001 R10: ffff88805c026a10 R11: ffff88805c026180 R12: ffff88805f8bff58 R13: ffffffff88d27b00 R14: 0000000020000040 R15: 0000000000000000 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f810ee8dc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000ce RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000459279 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000101 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f810ee8e6d4 R13: 00000000004c05d4 R14: 00000000004d2f70 R15: 00000000ffffffff