protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 INFO: task syz-executor3:18033 blocked for more than 140 seconds. kobject: 'kvm' (00000000ea08ce32): kobject_uevent_env Not tainted 5.0.0-rc5 #60 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'kvm' (00000000ea08ce32): fill_kobj_path: path = '/devices/virtual/misc/kvm' syz-executor3 D28704 18033 8173 0x00000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 kobject: 'loop5' (0000000079bf341e): kobject_uevent_env schedule+0x92/0x180 kernel/sched/core.c:3529 d_wait_lookup fs/dcache.c:2436 [inline] d_alloc_parallel+0x11cc/0x1bc0 fs/dcache.c:2518 kobject: 'loop5' (0000000079bf341e): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (0000000079bf341e): kobject_uevent_env kobject: 'loop5' (0000000079bf341e): fill_kobj_path: path = '/devices/virtual/block/loop5' lookup_open+0x52a/0x1b10 fs/namei.c:3147 do_last fs/namei.c:3324 [inline] path_openat+0x1e95/0x4690 fs/namei.c:3534 kobject: 'kvm' (00000000ea08ce32): kobject_uevent_env do_filp_open+0x1a1/0x280 fs/namei.c:3564 kobject: 'kvm' (00000000ea08ce32): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop1' (0000000084bd0efc): kobject_uevent_env kobject: 'loop1' (0000000084bd0efc): fill_kobj_path: path = '/devices/virtual/block/loop1' do_sys_open+0x3fe/0x5d0 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb1750dec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000340 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb1750df6d4 R13: 00000000004f4b3f R14: 00000000004d6fb0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1040: #0: 000000008b536cf5 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389 1 lock held by udevd/3867: 1 lock held by rsyslogd/7981: #0: 0000000064620948 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795 2 locks held by getty/8125: #0: 00000000c279a2b1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d3aed617 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8126: #0: 0000000054c7891c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000028c89225 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8127: #0: 00000000df7e9904 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000036195f6c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8128: #0: 000000004496cf60 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000054ce9ae8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8129: #0: 00000000a27c8dfa (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000073a03440 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8130: #0: 0000000031f5c0e4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000007ccedfaa (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/8131: #0: 00000000ebb193c7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a6725058 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by syz-executor3/18015: #0: 000000003a6925ac (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 000000003a6925ac (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3323 [inline] #0: 000000003a6925ac (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1e79/0x4690 fs/namei.c:3534 #1: 00000000b277ca91 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:364 1 lock held by syz-executor3/18033: #0: 000000003a6925ac (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 000000003a6925ac (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3323 [inline] #0: 000000003a6925ac (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1e79/0x4690 fs/namei.c:3534 2 locks held by syz-executor3/18841: #0: 0000000095ec15b7 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 0000000095ec15b7 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3323 [inline] #0: 0000000095ec15b7 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1e79/0x4690 fs/namei.c:3534 #1: 0000000044b31246 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:364 1 lock held by syz-executor1/18971: #0: 00000000895df63d (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000895df63d (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 2 locks held by syz-executor3/20399: #0: 0000000070b220bb (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 0000000070b220bb (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3323 [inline] #0: 0000000070b220bb (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1e79/0x4690 fs/namei.c:3534 #1: 0000000039e40cb0 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:364 2 locks held by syz-executor3/20494: #0: 00000000a1fce16d (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 00000000a1fce16d (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3323 [inline] #0: 00000000a1fce16d (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1e79/0x4690 fs/namei.c:3534 #1: 000000008e9923c9 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:364 1 lock held by syz-executor5/21804: #0: 00000000b44e4687 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000b44e4687 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/21829: #0: 0000000089753185 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000089753185 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/21848: #0: 000000003feeaaa2 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000003feeaaa2 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/21870: #0: 00000000c3d41689 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000c3d41689 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/21885: #0: 000000008ebf25a2 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000008ebf25a2 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/21904: #0: 00000000bef9c1c8 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000bef9c1c8 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/21926: #0: 00000000c937894d (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000c937894d (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor3/21980: #0: 000000002a103331 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000002a103331 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/21988: #0: 00000000f1ae262b (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000f1ae262b (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor5/22021: #0: 00000000b21a5dc6 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000b21a5dc6 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor5/22043: #0: 0000000087800e8d (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000087800e8d (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22113: #0: 000000004d9d82e4 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000004d9d82e4 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22291: #0: 00000000b49f30d8 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000b49f30d8 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22325: #0: 00000000775ac63e (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000775ac63e (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor3/22348: #0: 00000000ff6e1854 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000ff6e1854 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22367: #0: 000000009e9afb79 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000009e9afb79 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22386: #0: 0000000088c51713 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000088c51713 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor5/22412: #0: 00000000a7b6432b (&rp->fetch_lock){+.+.}, at: mon_bin_fetch+0x37/0x340 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor1/22414: #0: 00000000309c5a5b (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000309c5a5b (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22429: #0: 0000000067a53790 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000067a53790 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22471: #0: 000000003bf6378d (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000003bf6378d (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22486: #0: 00000000b49073bb (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000b49073bb (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22529: #0: 0000000039ada502 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000039ada502 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22552: #0: 000000002ceb499a (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000002ceb499a (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor5/22610: #0: 00000000a569c03d (&rp->fetch_lock){+.+.}, at: mon_bin_fetch+0x37/0x340 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor5/22711: #0: 000000003e71b717 (&rp->fetch_lock){+.+.}, at: mon_bin_fetch+0x37/0x340 drivers/usb/mon/mon_bin.c:909 1 lock held by syz-executor4/22742: #0: 000000007d19cc16 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000007d19cc16 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22790: #0: 00000000bf83a888 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000bf83a888 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22802: #0: 000000005df04b35 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000005df04b35 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22813: #0: 00000000f80ff290 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000f80ff290 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22821: #0: 000000001d0c5792 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000001d0c5792 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22845: #0: 0000000003970451 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000003970451 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/22881: #0: 0000000055d8982d (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000055d8982d (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/23446: #0: 0000000052e20151 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000052e20151 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/23463: #0: 00000000bd9a6a91 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000bd9a6a91 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/23651: #0: 00000000695bcfd6 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000695bcfd6 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/23672: #0: 000000003d99de22 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 000000003d99de22 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/23728: #0: 0000000058c9fbc6 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000058c9fbc6 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/23754: #0: 0000000041eb1422 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 0000000041eb1422 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 1 lock held by syz-executor4/23787: #0: 00000000ec6333c1 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000ec6333c1 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 2 locks held by syz-executor4/24475: #0: 00000000d57a126a (&mousedev->mutex#2){+.+.}, at: mousedev_close_device+0x22/0xd0 drivers/input/mousedev.c:444 #1: 00000000805689dc (&dev->mutex#2){+.+.}, at: input_close_device+0x48/0x170 drivers/input/input.c:658 1 lock held by syz-executor2/24479: #0: 000000004c045ffd (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] #0: 000000004c045ffd (&sb->s_type->i_mutex_key#11){+.+.}, at: __sock_release+0x89/0x250 net/socket.c:578 2 locks held by syz-executor5/24506: #0: 000000008cc6d556 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x810 fs/block_dev.c:1814 #1: 00000000c5ab2759 (loop_ctl_mutex){+.+.}, at: __loop_clr_fd+0x88/0xc90 drivers/block/loop.c:1046 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc5 #60 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:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3867 Comm: udevd Not tainted 5.0.0-rc5 #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_hardirqs_off_caller+0xf/0x220 kernel/trace/trace_preemptirq.c:61 Code: 00 e9 68 ff ff ff 4c 89 e7 e8 ed 95 31 00 e9 32 ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 49 89 fc <53> 48 83 ec 08 e8 57 9a fa ff 65 8b 1d a0 3b 8d 7e 31 ff 89 de e8 RSP: 0018:ffff888095a7fed0 EFLAGS: 00000046 RAX: 00000000000000e8 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00007ffdc2702200 RDI: ffffffff87200072 RBP: ffff888095a7fef0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87200072 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fecfff067a0(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc243f0fe0 CR3: 0000000095a15000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_off_thunk+0x1a/0x1c entry_SYSCALL_64_after_hwframe+0x3e/0xbe RIP: 0033:0x7fecff61a943 Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 RSP: 002b:00007ffdc2702108 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007fecff61a943 RDX: 0000000000000008 RSI: 00007ffdc2702200 RDI: 000000000000000a RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 000000000219a370 R15: 0000000002185030