INFO: task syz-executor.2:21230 blocked for more than 143 seconds. Not tainted 5.2.0-rc5-next-20190618 #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28200 21230 8945 0x80000000 Call Trace: context_switch kernel/sched/core.c:2818 [inline] __schedule+0x7c5/0x1560 kernel/sched/core.c:3444 schedule+0xa8/0x260 kernel/sched/core.c:3508 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:495 [inline] rwsem_down_read_failed+0x213/0x460 kernel/locking/rwsem-xadd.c:515 __down_read kernel/locking/rwsem.h:178 [inline] down_read+0xa5/0x1e0 kernel/locking/rwsem.c:26 exit_mm kernel/exit.c:513 [inline] do_exit+0x443/0x2fa0 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/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4592c9 Code: Bad RIP value. RSP: 002b:00007ffd45da7938 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00000000004592c9 RDX: 0000000000412fb1 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffd45da7990 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd45da7990 R14: 0000000000000000 R15: 00007ffd45da79a0 INFO: task syz-executor.2:21233 blocked for more than 143 seconds. Not tainted 5.2.0-rc5-next-20190618 #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27368 21233 8945 0x80004000 Call Trace: context_switch kernel/sched/core.c:2818 [inline] __schedule+0x7c5/0x1560 kernel/sched/core.c:3444 schedule+0xa8/0x260 kernel/sched/core.c:3508 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:495 [inline] rwsem_down_read_failed+0x213/0x460 kernel/locking/rwsem-xadd.c:515 __down_read kernel/locking/rwsem.h:178 [inline] down_read+0xa5/0x1e0 kernel/locking/rwsem.c:26 exit_mm kernel/exit.c:513 [inline] do_exit+0x443/0x2fa0 kernel/exit.c:864 do_group_exit+0x135/0x360 kernel/exit.c:981 get_signal+0x463/0x2490 kernel/signal.c:2728 do_signal+0x87/0x1990 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4592c9 Code: Bad RIP value. RSP: 002b:00007fa1d724bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: 0000000020145000 RBX: 0000000000000006 RCX: 00000000004592c9 RDX: 0000000001000002 RSI: 0000000000001000 RDI: 0000000020145000 RBP: 000000000075bf20 R08: ffffffffffffffff R09: 0000000000000000 R10: 0800000000008031 R11: 0000000000000246 R12: 00007fa1d724c6d4 R13: 00000000004c55cf R14: 00000000004d9998 R15: 00000000ffffffff INFO: task syz-executor.2:21238 can't die for more than 144 seconds. syz-executor.2 R running task 27208 21238 8945 0x00004006 Call Trace: context_switch kernel/sched/core.c:2821 [inline] __schedule+0x7cd/0x1560 kernel/sched/core.c:3444 Showing all locks held in the system: 1 lock held by khungtaskd/1045: #0: 0000000072af71b6 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5262 1 lock held by rsyslogd/8810: #0: 0000000043482bcc (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/8900: #0: 000000009dd51c01 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000217b6085 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8901: #0: 00000000bf4c72c9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000040c93d05 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8902: #0: 0000000041e06009 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001b227075 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8903: #0: 000000008b49db72 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ae6c9a33 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8904: #0: 000000003c315a2f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000761c21ce (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8905: #0: 0000000004a056b9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000747a5d6d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/8906: #0: 000000006e3879b9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e8145d9b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/21230: #0: 0000000047e15fba (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:513 [inline] #0: 0000000047e15fba (&mm->mmap_sem#2){++++}, at: do_exit+0x443/0x2fa0 kernel/exit.c:864 1 lock held by syz-executor.2/21233: #0: 0000000047e15fba (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:513 [inline] #0: 0000000047e15fba (&mm->mmap_sem#2){++++}, at: do_exit+0x443/0x2fa0 kernel/exit.c:864 1 lock held by syz-executor.2/21238: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1045 Comm: khungtaskd Not tainted 5.2.0-rc5-next-20190618 #17 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: NMI backtrace for cpu 0 CPU: 0 PID: 21238 Comm: syz-executor.2 Not tainted 5.2.0-rc5-next-20190618 #17 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x50 kernel/kcov.c:107 Code: 65 8b 15 20 fe 90 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 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 RSP: 0018:ffff88806e0874b8 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 0000000000000004 RCX: ffffc9000a41c000 RDX: 000000000003ffff RSI: ffffffff8198987a RDI: 0000000000000001 RBP: ffff88806e0874b8 R08: ffff8880a0c02540 R09: ffffed1015d06c70 R10: ffffed1015d06c6f R11: ffff8880ae83637b R12: 0000000000000004 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88806e0876c0 FS: 00007fa1d722b700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000096eac000 CR4: 00000000001426f0 Call Trace: trace_mm_compaction_finished include/trace/events/compaction.h:226 [inline] compact_finished mm/compaction.c:1941 [inline] compact_zone+0x273a/0x3820 mm/compaction.c:2140 compact_zone_order+0x1af/0x2a0 mm/compaction.c:2308 try_to_compact_pages+0x268/0xaf0 mm/compaction.c:2360 __alloc_pages_direct_compact+0x154/0x460 mm/page_alloc.c:3846 __alloc_pages_slowpath+0x50e/0x2900 mm/page_alloc.c:4413 __alloc_pages_nodemask+0x600/0x8d0 mm/page_alloc.c:4693 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] alloc_pages_vma+0x39a/0x540 mm/mempolicy.c:2088 new_page+0x2d5/0x3d0 mm/mempolicy.c:1145 unmap_and_move mm/migrate.c:1179 [inline] migrate_pages+0x47f/0x2ae0 mm/migrate.c:1430 do_mbind mm/mempolicy.c:1256 [inline] kernel_mbind+0xaf1/0xd90 mm/mempolicy.c:1373 __do_sys_mbind mm/mempolicy.c:1380 [inline] __se_sys_mbind mm/mempolicy.c:1376 [inline] __x64_sys_mbind+0xe1/0x1a0 mm/mempolicy.c:1376 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4592c9 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:00007fa1d722ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004592c9 RDX: 0000000000000000 RSI: 0000000000c00000 RDI: 0000000020012000 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000010000000002 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa1d722b6d4 R13: 00000000004c5541 R14: 00000000004d9830 R15: 00000000ffffffff