INFO: task syz-executor5:5887 blocked for more than 140 seconds. Not tainted 4.19.0-rc6+ #41 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D25496 5887 20551 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:738 [inline] vfs_setxattr+0x96/0x100 fs/xattr.c:218 setxattr+0x2ea/0x450 fs/xattr.c:450 path_setxattr+0x1e3/0x230 fs/xattr.c:469 __do_sys_lsetxattr fs/xattr.c:491 [inline] __se_sys_lsetxattr fs/xattr.c:487 [inline] __x64_sys_lsetxattr+0xc1/0x150 fs/xattr.c:487 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: Bad RIP value. RSP: 002b:00007f618d81ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579 RDX: 0000000020000600 RSI: 0000000020000480 RDI: 0000000020000340 RBP: 000000000072bfa0 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 00007f618d81f6d4 R13: 00000000004c2722 R14: 00000000004d3900 R15: 00000000ffffffff INFO: task syz-executor5:5918 blocked for more than 140 seconds. Not tainted 4.19.0-rc6+ #41 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D24504 5918 20551 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:738 [inline] do_last fs/namei.c:3321 [inline] path_openat+0x15c7/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 ksys_open include/linux/syscalls.h:1276 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: Bad RIP value. RSP: 002b:00007f618d7fdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f618d7fe6d4 R13: 00000000004bdb43 R14: 00000000004cc688 R15: 00000000ffffffff INFO: task syz-executor5:5919 blocked for more than 140 seconds. Not tainted 4.19.0-rc6+ #41 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D25880 5919 20551 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write_nested+0xa9/0x130 kernel/locking/rwsem.c:194 inode_lock_nested include/linux/fs.h:773 [inline] filename_create+0x1b2/0x5b0 fs/namei.c:3635 user_path_create fs/namei.c:3693 [inline] do_mkdirat+0xda/0x310 fs/namei.c:3832 __do_sys_mkdir fs/namei.c:3856 [inline] __se_sys_mkdir fs/namei.c:3854 [inline] __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3854 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: Bad RIP value. RSP: 002b:00007f618d7dcc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000143 RDI: 0000000020000bc0 RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f618d7dd6d4 R13: 00000000004bcf61 R14: 00000000004d3ae0 R15: 00000000ffffffff INFO: task syz-executor5:5921 blocked for more than 140 seconds. Not tainted 4.19.0-rc6+ #41 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D23768 5921 20551 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:738 [inline] lock_mount+0x8c/0x2e0 fs/namespace.c:2027 do_add_mount+0x27/0x370 fs/namespace.c:2404 do_new_mount fs/namespace.c:2471 [inline] do_mount+0x19cd/0x31f0 fs/namespace.c:2787 ksys_mount+0x12d/0x140 fs/namespace.c:3003 __do_sys_mount fs/namespace.c:3017 [inline] __se_sys_mount fs/namespace.c:3014 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3014 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: Bad RIP value. RSP: 002b:00007f618d7bbc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579 RDX: 00000000200008c0 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000072c180 R08: 0000000020000440 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f618d7bc6d4 R13: 00000000004c28b5 R14: 00000000004d3c90 R15: 00000000ffffffff INFO: task syz-executor5:5922 blocked for more than 140 seconds. Not tainted 4.19.0-rc6+ #41 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D25496 5922 20551 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:738 [inline] vfs_setxattr+0x96/0x100 fs/xattr.c:218 setxattr+0x2ea/0x450 fs/xattr.c:450 path_setxattr+0x1e3/0x230 fs/xattr.c:469 __do_sys_lsetxattr fs/xattr.c:491 [inline] __se_sys_lsetxattr fs/xattr.c:487 [inline] __x64_sys_lsetxattr+0xc1/0x150 fs/xattr.c:487 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 Code: Bad RIP value. RSP: 002b:00007f618d79ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579 RDX: 0000000020000600 RSI: 0000000020000480 RDI: 0000000020000340 RBP: 000000000072c220 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 00007f618d79b6d4 R13: 00000000004c2722 R14: 00000000004d3900 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/982: #0: 0000000051083123 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435 1 lock held by rsyslogd/5269: #0: 0000000000cd9bc5 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/5359: #0: 0000000015f32179 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000033195ea3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5360: #0: 00000000fd1142db (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000109b8bc0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5361: #0: 000000004bbe3986 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000028a7ed14 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5362: #0: 000000007ddd16a7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000d580efe1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5363: #0: 00000000ea26df82 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000018fb7d6e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5364: #0: 000000009cbf28e9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000006f1c904 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5365: #0: 000000005d2d280f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000721296dd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor5/5884: #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: inode_lock include/linux/fs.h:738 [inline] #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: do_last fs/namei.c:3321 [inline] #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: path_openat+0x15c7/0x5160 fs/namei.c:3534 2 locks held by syz-executor5/5887: #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: inode_lock include/linux/fs.h:738 [inline] #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:218 2 locks held by syz-executor5/5918: #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: inode_lock include/linux/fs.h:738 [inline] #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: do_last fs/namei.c:3321 [inline] #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: path_openat+0x15c7/0x5160 fs/namei.c:3534 2 locks held by syz-executor5/5919: #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#22/1){+.+.}, at: inode_lock_nested include/linux/fs.h:773 [inline] #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#22/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3635 1 lock held by syz-executor5/5921: #0: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: inode_lock include/linux/fs.h:738 [inline] #0: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: lock_mount+0x8c/0x2e0 fs/namespace.c:2027 2 locks held by syz-executor5/5922: #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 00000000e409ce8c (sb_writers#16){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: inode_lock include/linux/fs.h:738 [inline] #1: 0000000048ca8dc2 (&sb->s_type->i_mutex_key#23){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:218 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 982 Comm: khungtaskd Not tainted 4.19.0-rc6+ #41 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+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed 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:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.478 msecs NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc6+ #41 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:update_cfs_rq_load_avg kernel/sched/fair.c:3348 [inline] RIP: 0010:update_blocked_averages+0xb7f/0x1e00 kernel/sched/fair.c:7285 Code: 34 3a 48 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f 85 cb 0c 00 00 8b b3 c8 0a 00 00 4c 89 ea 48 89 c7 e8 11 7b 06 00 <4c> 89 ef e8 79 b1 ff ff 4d 8d 85 90 01 00 00 4c 89 c0 48 c1 e8 03 RSP: 0018:ffff8801dae07388 EFLAGS: 00000002 RAX: 0000000000000001 RBX: ffff8801dae2cb40 RCX: 1ffff1003b5c5996 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8801dae2ccb0 RBP: ffff8801dae077a8 R08: 0000000000000001 R09: 0000000000000007 R10: 00000000fa83b2da R11: ffff8801dae2cc98 R12: ffff8801dae07780 R13: ffff8801dae2cc00 R14: ffff8801dae2cca0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045754f CR3: 00000001bcb95000 CR4: 00000000001406f0 Call Trace: _nohz_idle_balance+0x5ba/0x7a0 kernel/sched/fair.c:9271 nohz_idle_balance kernel/sched/fair.c:9324 [inline] run_rebalance_domains+0x2ec/0x500 kernel/sched/fair.c:9507 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 scheduler_ipi+0x55a/0xad0 kernel/sched/core.c:1780 smp_reschedule_interrupt+0x109/0x650 arch/x86/kernel/smp.c:278 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:888 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57 Code: e9 2c ff ff ff 48 89 c7 48 89 45 d8 e8 13 28 12 fa 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 02 28 12 fa eb 82 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 RSP: 0018:ffffffff89207bb8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: 1ffffffff1240f7b RCX: 0000000000000000 RDX: 1ffffffff1263e44 RSI: 0000000000000001 RDI: ffffffff8931f220 RBP: ffffffff89207bb8 R08: ffffffff89276e40 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89207c78 R13: ffffffff89f3c0e0 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xbf/0x490 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3db/0x5b0 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 rest_init+0xe2/0xe5 init/main.c:442 start_kernel+0x8f4/0x92f init/main.c:739 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243