[26338] 0 26338 18145 8714 25 3 0 0 syz-executor.3 [26345] 0 26345 18178 8716 25 3 0 0 syz-executor.3 [26458] 0 26458 18145 8714 25 3 0 0 syz-executor.3 INFO: task udevd:31180 blocked for more than 140 seconds. Not tainted 4.14.138+ #32 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D27968 31180 190 0x00000000 [26466] 0 26466 18178 8716 25 3 0 0 syz-executor.3 Call Trace: [27809] 0 27809 18178 8747 26 4 0 0 syz-executor.3 [28001] 0 28001 18145 8745 26 4 0 0 syz-executor.3 [28991] 0 28991 18145 8745 26 4 0 0 syz-executor.3 schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 [29369] 0 29369 18178 8748 26 4 0 0 syz-executor.3 [29936] 0 29936 18178 8748 26 4 0 0 syz-executor.3 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [29938] 0 29938 18178 8748 26 4 0 0 syz-executor.3 [16912] 0 16912 18244 8751 26 4 0 0 syz-executor.3 [17096] 0 17096 18145 8715 25 3 0 0 syz-executor.3 kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 do_inode_permission fs/namei.c:386 [inline] __inode_permission2+0x22c/0x2c0 fs/namei.c:428 inode_permission2+0x2d/0x100 fs/namei.c:485 [17104] 0 17104 18244 8723 25 3 0 0 syz-executor.3 [17295] 0 17295 18244 8755 26 4 0 0 syz-executor.3 may_lookup fs/namei.c:1731 [inline] link_path_walk+0x8a6/0x1110 fs/namei.c:2111 path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2356 [17299] 0 17299 18145 8717 25 3 0 0 syz-executor.3 [17304] 0 17304 18244 8755 26 4 0 0 syz-executor.3 [17590] 0 17590 18145 8745 26 4 0 0 syz-executor.3 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 [17731] 0 17731 18145 8712 24 3 0 0 syz-executor.3 [17768] 0 17768 18178 8716 25 3 0 0 syz-executor.3 SYSC_readlinkat fs/stat.c:394 [inline] SyS_readlinkat+0xbe/0x2b0 fs/stat.c:382 [17788] 0 17788 18145 8712 24 3 0 0 syz-executor.3 [18534] 0 18534 18211 8749 33 4 0 0 syz-executor.3 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 [18633] 0 18633 18211 8749 26 4 0 0 syz-executor.3 [20190] 0 20190 18145 8713 25 3 0 0 syz-executor.3 RIP: 0033:0x7efc94f76577 RSP: 002b:00007ffd1b58cd68 EFLAGS: 00000246 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 000000000221f030 RCX: 00007efc94f76577 RDX: 0000000000000400 RSI: 00007ffd1b58cd70 RDI: 00007ffd1b58d250 [20234] 0 20234 18211 8719 26 3 0 0 syz-executor.3 RBP: 0000000002237af0 R08: 0000000002237af0 R09: 7665642f7379732f [20995] 0 20995 18178 8719 25 3 0 0 syz-executor.3 R10: 7269762f73656369 R11: 0000000000000246 R12: 00007ffd1b58d250 [21030] 0 21030 18145 8714 25 3 0 0 syz-executor.3 R13: 0000000000000400 R14: 000000000221f030 R15: 000000000000000b INFO: task udevd:19146 blocked for more than 140 seconds. [21116] 0 21116 18211 8719 26 3 0 0 syz-executor.3 Not tainted 4.14.138+ #32 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [21405] 0 21405 18244 8754 26 4 0 0 syz-executor.3 udevd D26128 19146 190 0x00000000 Call Trace: [21452] 0 21452 18277 8756 26 4 0 0 syz-executor.3 [22361] 0 22361 18145 8714 25 3 0 0 syz-executor.3 [22371] 0 22371 18211 8718 25 3 0 0 syz-executor.3 [23561] 0 23561 18145 8746 26 4 0 0 syz-executor.3 schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 [23755] 0 23755 18145 8714 25 3 0 0 syz-executor.3 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [23761] 0 23761 18178 8716 25 3 0 0 syz-executor.3 [23827] 0 23827 18691 8749 26 4 0 0 syz-executor.3 [24501] 0 24501 18244 8752 26 4 0 0 syz-executor.3 kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 [30590] 0 30590 18178 13261 32 3 0 0 syz-executor.3 do_inode_permission fs/namei.c:386 [inline] __inode_permission2+0x22c/0x2c0 fs/namei.c:428 inode_permission2+0x2d/0x100 fs/namei.c:485 may_lookup fs/namei.c:1731 [inline] link_path_walk+0x8a6/0x1110 fs/namei.c:2111 [30595] 0 30595 18209 13292 32 3 0 0 syz-executor.3 path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2356 [31180] 0 31180 5417 218 14 3 0 -1000 udevd [31221] 0 31221 5417 217 14 3 0 -1000 udevd [ 1601] 0 1601 18113 15 23 3 0 0 syz-executor.0 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 [ 1602] 0 1602 18112 8732 24 4 0 0 syz-executor.0 [ 5615] 0 5615 18145 8715 26 3 0 0 syz-executor.3 [ 5627] 0 5627 18178 8718 26 3 0 0 syz-executor.3 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xe1/0x180 fs/stat.c:185 vfs_stat include/linux/fs.h:3085 [inline] SYSC_newstat fs/stat.c:337 [inline] SyS_newstat+0x96/0x110 fs/stat.c:333 [ 5763] 0 5763 18145 8714 25 3 0 0 syz-executor.3 [ 5764] 0 5764 18211 8752 26 4 0 0 syz-executor.3 [ 5771] 0 5771 18178 8718 25 3 0 0 syz-executor.3 [ 5947] 0 5947 18211 8750 26 4 0 0 syz-executor.3 [ 6185] 0 6185 18402 8746 26 4 0 0 syz-executor.3 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 7178] 0 7178 18178 8749 26 4 0 0 syz-executor.3 RIP: 0033:0x7efc94f74c65 [ 7353] 0 7353 18178 8748 33 4 0 0 syz-executor.3 RSP: 002b:00007ffd1b589138 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 000000000226a7d8 RCX: 00007efc94f74c65 RDX: 00007ffd1b5891b0 RSI: 00007ffd1b5891b0 RDI: 00007ffd1b589640 RBP: 0000000002254980 R08: 00007ffd1b589a40 R09: 00007ffd1b589670 R10: 6f6c622f6c617574 R11: 0000000000000246 R12: 0000000002257a00 R13: 0000000000625500 R14: 000000000221f030 R15: 0000000002257a00 [ 8535] 0 8535 18211 8752 27 4 0 0 syz-executor.3 [ 8606] 0 8606 18211 8752 27 4 0 0 syz-executor.3 INFO: task blkid:19157 blocked for more than 140 seconds. Not tainted 4.14.138+ #32 [ 8684] 0 8684 18145 8749 26 4 0 0 syz-executor.3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D27888 19157 19142 0x00000000 [ 9986] 0 9986 18145 8712 25 3 0 0 syz-executor.0 Call Trace: [ 9992] 0 9992 18178 8714 25 3 0 0 syz-executor.0 [10021] 0 10021 18211 8750 26 4 0 0 syz-executor.0 [10114] 0 10114 18113 15 23 3 0 0 syz-executor.2 [10122] 0 10122 18112 8732 24 4 0 0 syz-executor.2 schedule+0x92/0x1c0 kernel/sched/core.c:3498 [10629] 0 10629 18145 8712 25 3 0 0 syz-executor.0 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 [11579] 0 11579 18211 8749 26 4 0 0 syz-executor.0 [11703] 0 11703 18145 8716 26 3 0 0 syz-executor.3 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [11709] 0 11709 18211 8720 26 3 0 0 syz-executor.3 kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 [11968] 0 11968 18145 8714 25 3 0 0 syz-executor.3 do_inode_permission fs/namei.c:386 [inline] __inode_permission2+0x22c/0x2c0 fs/namei.c:428 [11972] 0 11972 18211 8719 25 3 0 0 syz-executor.3 inode_permission2+0x2d/0x100 fs/namei.c:485 may_lookup fs/namei.c:1731 [inline] link_path_walk+0x8a6/0x1110 fs/namei.c:2111 path_openat+0x178/0x2be0 fs/namei.c:3596 [12215] 0 12215 18178 8710 25 3 0 1000 syz-executor.2 [12235] 0 12235 18211 8718 30 3 0 1000 syz-executor.2 do_filp_open+0x1a1/0x280 fs/namei.c:3631 [12698] 0 12698 18113 16 23 3 0 0 syz-executor.5 [12699] 0 12699 18112 8714 24 4 0 0 syz-executor.5 [13776] 0 13776 18145 8715 25 3 0 0 syz-executor.3 [13827] 0 13827 34629 8729 27 3 0 0 syz-executor.3 do_sys_open+0x2ca/0x590 fs/open.c:1096 [13839] 0 13839 18145 8714 25 3 0 0 syz-executor.3 [13841] 0 13841 18178 8716 25 3 0 0 syz-executor.3 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 [13879] 0 13879 18145 8703 24 3 0 0 syz-executor.0 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f4be1490120 RSP: 002b:00007fffa8268b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [13880] 0 13880 18145 8712 25 3 0 0 syz-executor.0 RAX: ffffffffffffffda RBX: 00007fffa8269b60 RCX: 00007f4be1490120 RDX: 00007fffa8268b36 RSI: 0000000000000000 RDI: 00007fffa8268b20 [14169] 0 14169 18145 8743 26 4 0 1000 syz-executor.5 [14614] 0 14614 18178 8742 26 4 0 1000 syz-executor.2 [14785] 0 14785 18211 8749 25 4 0 0 syz-executor.3 RBP: 0000000000110300 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffa826abd8 [14839] 0 14839 18211 8749 25 4 0 0 syz-executor.3 [15219] 0 15219 18244 8752 26 4 0 0 syz-executor.3 R13: 0000000000000000 R14: 00007f4be1971820 R15: 00007f4be17672a2 Showing all locks held in the system: 1 lock held by init/1: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<00000000662ab4c2>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 1 lock held by udevd/190: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by rsyslogd/1629: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 2 locks held by getty/1756: #0: (&tty->ldisc_sem){++++}, at: [<000000004f045571>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000002a3ad898>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-fuzzer/1776: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by syz-fuzzer/1779: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by syz-fuzzer/1782: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by syz-executor.3/16737: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/31180: #0: (kernfs_mutex){+.+.}, at: [<00000000f0a901be>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 1 lock held by syz-executor.5/12699: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18767: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18783: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18784: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18790: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18794: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18795: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18796: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18798: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18800: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18802: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18803: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18804: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18806: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18807: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18810: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18812: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18815: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18816: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18819: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18821: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18822: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18823: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18824: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18826: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18827: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18828: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18829: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18830: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18835: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18837: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18842: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18845: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18846: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18847: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18848: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18852: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18853: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18854: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18855: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18856: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18857: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18858: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18861: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18875: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18881: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18882: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18883: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18884: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18885: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18886: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18887: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18888: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18889: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18891: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18892: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18895: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18896: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18901: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18902: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18903: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18904: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18905: [15270] 0 15270 18244 8752 26 4 0 0 syz-executor.3 #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18906: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18907: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18908: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18909: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18910: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18911: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18912: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18913: [15997] 0 15997 18178 8745 33 4 0 0 syz-executor.5 #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18914: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18915: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18916: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18917: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 [16280] 0 16280 18178 8749 26 4 0 0 syz-executor.3 1 lock held by blkid/18918: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18919: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18922: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18923: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18924: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18925: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18926: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18928: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18929: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18930: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 [16295] 0 16295 18113 15 23 3 0 0 syz-executor.1 1 lock held by udevd/18931: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18932: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18934: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18937: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18938: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18939: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18940: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18941: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18942: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18946: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18949: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18950: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 [16296] 0 16296 18112 8731 24 4 0 0 syz-executor.1 1 lock held by udevd/18951: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18952: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18953: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18954: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18955: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18956: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18957: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18958: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18959: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18960: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18961: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18962: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18963: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18965: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18967: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 [16668] 0 16668 18310 8752 27 4 0 0 syz-executor.2 1 lock held by blkid/18968: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18969: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18970: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18971: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18972: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18975: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18978: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18988: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18989: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18990: [16921] 0 16921 18145 8716 25 3 0 0 syz-executor.0 #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/18991: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/18992: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18993: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/18994: #0: (&ei->i_mmap_sem){++++}, at: [<00000000f246da5b>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/18996: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 [16928] 0 16928 18211 8720 25 3 0 0 syz-executor.0 1 lock held by blkid/18997: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/19009: #0: (&mm->mmap_sem){++++}, at: [<000000004cc8fc77>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/19146: #0: (kernfs_mutex){+.+.}, at: [<00000000f0a901be>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 1 lock held by blkid/19157: #0: (kernfs_mutex){+.+.}, at: [<00000000f0a901be>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.138+ #32 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x629/0xbe0 kernel/hung_task.c:274 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 18990 Comm: blkid Not tainted 4.14.138+ #32 task: 000000001cf0835b task.stack: 0000000038087cb1 RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:perf_trace_lock_acquire+0xcb/0x4e0 include/trace/events/lock.h:13 RSP: 0000:ffff8881a8bd72a0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 1ffffffff1e447d6 RSI: ffffffff8f223e98 RDI: ffffffff8eec0c60 RBP: ffff8881a8bd7380 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff8cbf5790 R11: ffffffff8f22ce8b R12: ffffffff8eec0be0 R13: ffffffff8f223e98 R14: ffff8881a8bd7358 R15: 0000000000000000 FS: 00007f827e759740(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efc94ff2aa1 CR3: 0000000192bfc006 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x279/0x360 kernel/locking/lockdep.c:3990 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x36/0x40 kernel/locking/spinlock.c:168 spin_lock_irq include/linux/spinlock.h:342 [inline] shrink_inactive_list+0x417/0x1130 mm/vmscan.c:1829 shrink_list mm/vmscan.c:2179 [inline] shrink_node_memcg+0x5ad/0x1470 mm/vmscan.c:2444 shrink_node+0x2f3/0xc30 mm/vmscan.c:2636 shrink_zones mm/vmscan.c:2818 [inline] do_try_to_free_pages+0x350/0xd80 mm/vmscan.c:2876 try_to_free_pages+0x27c/0x710 mm/vmscan.c:3082 __perform_reclaim mm/page_alloc.c:3602 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3624 [inline] __alloc_pages_slowpath mm/page_alloc.c:4011 [inline] __alloc_pages_nodemask+0xaee/0x2370 mm/page_alloc.c:4220 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] alloc_zeroed_user_highpage_movable include/linux/highmem.h:184 [inline] do_anonymous_page mm/memory.c:3133 [inline] handle_pte_fault mm/memory.c:3987 [inline] __handle_mm_fault+0x1116/0x2700 mm/memory.c:4113 handle_mm_fault+0x2f1/0x6da mm/memory.c:4150 __do_page_fault+0x477/0xbb0 arch/x86/mm/fault.c:1423 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1122 RIP: 07ff:0x1052320 RSP: 7bf95f10:0000000001051eb0 EFLAGS: 00000001 Code: 03 00 00 49 8d 45 18 4d 8b bc 24 80 00 00 00 48 89 c2 48 89 85 38 ff ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 48 03 00 00 49 8b 7d 18 48 85 ff 0f 84 d6 02 00 00 e8 bd