INFO: task syz-executor.0:16060 blocked for more than 143 seconds. Not tainted 5.2.0-rc6-next-20190628 #25 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28160 16060 9097 0x80000000 Call Trace: context_switch kernel/sched/core.c:3252 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3878 schedule+0xa8/0x270 kernel/sched/core.c:3942 rwsem_down_read_slowpath+0x4cc/0xf90 kernel/locking/rwsem.c:1079 __down_read kernel/locking/rwsem.c:1304 [inline] down_read+0x1f4/0x3f0 kernel/locking/rwsem.c:1447 exit_mm kernel/exit.c:513 [inline] do_exit+0x47b/0x2ea0 kernel/exit.c:864 do_group_exit+0x135/0x360 kernel/exit.c:981 __do_sys_exit_group kernel/exit.c:992 [inline] __se_sys_exit_group kernel/exit.c:990 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:990 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: Bad RIP value. RSP: 002b:00007ffe035b3408 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000459519 RDX: 0000000000413201 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffe035b3460 R10: 0000000000760b28 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe035b3460 R14: 0000000000000000 R15: 00007ffe035b3470 INFO: task syz-executor.0:16061 blocked for more than 143 seconds. Not tainted 5.2.0-rc6-next-20190628 #25 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D25624 16061 9097 0x80004000 Call Trace: context_switch kernel/sched/core.c:3252 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3878 schedule+0xa8/0x270 kernel/sched/core.c:3942 rwsem_down_read_slowpath+0x4cc/0xf90 kernel/locking/rwsem.c:1079 __down_read kernel/locking/rwsem.c:1304 [inline] down_read+0x1f4/0x3f0 kernel/locking/rwsem.c:1447 exit_mm kernel/exit.c:513 [inline] do_exit+0x47b/0x2ea0 kernel/exit.c:864 do_group_exit+0x135/0x360 kernel/exit.c:981 get_signal+0x47c/0x2500 kernel/signal.c:2728 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x251/0x2d0 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5a9/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: Bad RIP value. RSP: 002b:00007f6f42358cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c R13: 00007ffe035b31ff R14: 00007f6f423599c0 R15: 000000000075bf2c INFO: task syz-executor.0:16066 blocked for more than 144 seconds. Not tainted 5.2.0-rc6-next-20190628 #25 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28712 16066 9097 0x80004000 Call Trace: context_switch kernel/sched/core.c:3252 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3878 schedule+0xa8/0x270 kernel/sched/core.c:3942 rwsem_down_read_slowpath+0x4cc/0xf90 kernel/locking/rwsem.c:1079 __down_read kernel/locking/rwsem.c:1304 [inline] down_read+0x1f4/0x3f0 kernel/locking/rwsem.c:1447 exit_mm kernel/exit.c:513 [inline] do_exit+0x47b/0x2ea0 kernel/exit.c:864 do_group_exit+0x135/0x360 kernel/exit.c:981 get_signal+0x47c/0x2500 kernel/signal.c:2728 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x251/0x2d0 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x5a9/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: Bad RIP value. RSP: 002b:00007f6f42337cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4 R13: 00007ffe035b31ff R14: 00007f6f423389c0 R15: 000000000075bfd4 INFO: task syz-executor.0:16098 can't die for more than 144 seconds. syz-executor.0 R running task 26728 16098 9097 0x00004006 Call Trace: Showing all locks held in the system: 1 lock held by khungtaskd/1046: #0: 00000000c9557da8 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5257 1 lock held by rsyslogd/8969: #0: 00000000810036ce (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/9059: #0: 0000000011ff8805 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000179d990e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9060: #0: 000000009a49330d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f95e4eae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9061: #0: 00000000e4096382 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a184f202 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9062: #0: 000000008298942b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000002850dad5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9063: #0: 00000000217e259e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000bf563ee5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9064: #0: 00000000d78e9dea (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000095cdd59 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9065: #0: 000000006547dfe2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000053f130b1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.0/16060: #0: 0000000044706d7b (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:513 [inline] #0: 0000000044706d7b (&mm->mmap_sem#2){++++}, at: do_exit+0x47b/0x2ea0 kernel/exit.c:864 1 lock held by syz-executor.0/16061: #0: 0000000044706d7b (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:513 [inline] #0: 0000000044706d7b (&mm->mmap_sem#2){++++}, at: do_exit+0x47b/0x2ea0 kernel/exit.c:864 1 lock held by syz-executor.0/16066: #0: 0000000044706d7b (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:513 [inline] #0: 0000000044706d7b (&mm->mmap_sem#2){++++}, at: do_exit+0x47b/0x2ea0 kernel/exit.c:864 1 lock held by syz-executor.0/16098: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1046 Comm: khungtaskd Not tainted 5.2.0-rc6-next-20190628 #25 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+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b 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+0xc54/0x1320 kernel/hung_task.c:333 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:353 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16098 Comm: syz-executor.0 Not tainted 5.2.0-rc6-next-20190628 #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:isolate_migratepages mm/compaction.c:1832 [inline] RIP: 0010:compact_zone+0x144a/0x38d0 mm/compaction.c:2158 Code: ff ff ff e8 b8 a6 ff ff 31 ff 48 89 c3 48 89 c6 48 89 85 70 ff ff ff e8 74 9f d7 ff 48 85 db 0f 84 09 fb ff ff e8 c6 9d d7 ff <48> 8b 85 58 ff ff ff 48 c1 e8 03 42 80 3c 28 00 0f 85 c5 1f 00 00 RSP: 0018:ffff8880775f74c8 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 0000000000057c20 RCX: ffffc900061f3000 RDX: 0000000000040000 RSI: ffffffff819abf7a RDI: 0000000000000007 RBP: ffff8880775f7660 R08: ffff88808ce923c0 R09: ffffed1015d26c7c R10: ffffed1015d26c7b R11: ffff8880ae9363db R12: ffffea00015f0000 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880775f76c0 FS: 00007f6f42317700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000028875000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: compact_zone_order+0x1af/0x2a0 mm/compaction.c:2308 try_to_compact_pages+0x281/0xb70 mm/compaction.c:2360 __alloc_pages_direct_compact+0x154/0x460 mm/page_alloc.c:3898 __alloc_pages_slowpath+0x9b3/0x2520 mm/page_alloc.c:4533 __alloc_pages_nodemask+0x62e/0x8f0 mm/page_alloc.c:4741 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] alloc_pages_vma+0x3c5/0x560 mm/mempolicy.c:2144 new_page+0x325/0x440 mm/mempolicy.c:1193 unmap_and_move mm/migrate.c:1179 [inline] migrate_pages+0x358/0x2e20 mm/migrate.c:1430 do_mbind mm/mempolicy.c:1309 [inline] kernel_mbind+0xb20/0xe00 mm/mempolicy.c:1429 __do_sys_mbind mm/mempolicy.c:1436 [inline] __se_sys_mbind mm/mempolicy.c:1432 [inline] __x64_sys_mbind+0xe1/0x1a0 mm/mempolicy.c:1432 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 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:00007f6f42316c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000c00000 RDI: 0000000020012000 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000010000000002 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6f423176d4 R13: 00000000004c5794 R14: 00000000004d9d70 R15: 00000000ffffffff