[13490] 0 13490 18178 8971 26 4 0 0 syz-executor.4 [13731] 0 13731 18145 8747 25 3 0 0 syz-executor.2 [13736] 0 13736 18244 8753 25 3 0 0 syz-executor.2 INFO: task blkid:26166 blocked for more than 140 seconds. [13831] 0 13831 18178 8976 26 4 0 0 syz-executor.1 Not tainted 4.14.135+ #26 [13927] 0 13927 18267 8980 27 4 0 0 syz-executor.1 [14004] 0 14004 18211 8974 27 4 0 0 syz-executor.0 [14043] 0 14043 18211 8975 26 4 0 0 syz-executor.1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D27752 26166 26151 0x00000000 Call Trace: [14141] 0 14141 18178 8994 27 4 0 0 syz-executor.5 [14251] 0 14251 18178 8973 26 4 0 0 syz-executor.1 [14263] 0 14263 18145 8746 25 3 0 0 syz-executor.1 [14603] 0 14603 18178 8970 33 4 0 0 syz-executor.4 [14667] 0 14667 18277 8979 26 4 0 0 syz-executor.1 [14690] 0 14690 18145 8762 26 3 0 0 syz-executor.1 [14693] 0 14693 18195 8750 26 3 0 0 syz-executor.1 [14699] 0 14699 18261 8979 27 4 0 0 /selinux/status schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 kernfs_dop_revalidate+0x8d/0x370 fs/kernfs/dir.c:570 d_revalidate fs/namei.c:799 [inline] lookup_fast+0x927/0xea0 fs/namei.c:1658 walk_component+0xd3/0xbf0 fs/namei.c:1835 [14717] 0 14717 18244 8979 27 4 0 0 syz-executor.0 [14743] 0 14743 18244 8979 27 4 0 0 syz-executor.0 [15034] 0 15034 18244 8996 27 4 0 0 syz-executor.5 [15040] 0 15040 18244 8996 27 4 0 0 syz-executor.5 [15175] 0 15175 18145 8746 25 3 0 0 syz-executor.1 [15253] 0 15253 18211 8750 28 3 0 0 syz-executor.1 link_path_walk+0x84a/0x1110 fs/namei.c:2168 path_openat+0x178/0x2be0 fs/namei.c:3596 [15257] 0 15257 18211 8750 32 3 0 0 syz-executor.1 [15310] 0 15310 18178 8973 26 4 0 0 syz-executor.1 do_filp_open+0x1a1/0x280 fs/namei.c:3631 do_sys_open+0x2ca/0x590 fs/open.c:1096 [15312] 0 15312 18178 8749 25 3 0 0 syz-executor.1 [15337] 0 15337 18211 8976 27 4 0 0 syz-executor.1 [15431] 0 15431 18244 8975 26 4 0 0 syz-executor.2 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 INFO: task blkid:26167 blocked for more than 140 seconds. Not tainted 4.14.135+ #26 [15515] 0 15515 18178 8970 26 4 0 0 syz-executor.4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D27776 26167 26154 0x00000000 Call Trace: [15520] 0 15520 18178 8970 26 4 0 0 syz-executor.4 schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [15771] 0 15771 18244 8996 27 4 0 0 syz-executor.5 [15774] 0 15774 18244 8996 27 4 0 0 syz-executor.5 [16051] 0 16051 18145 8968 26 4 0 0 syz-executor.4 [16062] 0 16062 18178 8750 25 3 0 0 syz-executor.1 [16079] 0 16079 18244 8754 25 3 0 0 syz-executor.1 kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 [16126] 0 16126 18142 8747 25 3 0 0 syz-executor.1 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 path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2356 [16134] 0 16134 18175 8756 26 3 0 0 syz-executor.1 [16211] 0 16211 18244 9012 27 4 0 0 syz-executor.5 [16227] 0 16227 18211 8993 26 4 0 0 syz-executor.3 [16253] 0 16253 18211 8993 26 4 0 0 syz-executor.3 [16310] 0 16310 18145 8746 25 3 0 0 syz-executor.1 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 [16316] 0 16316 18145 8968 26 4 0 0 syz-executor.4 SYSC_readlinkat fs/stat.c:394 [inline] SyS_readlinkat+0xbe/0x2b0 fs/stat.c:382 [16321] 0 16321 18178 8749 25 3 0 0 syz-executor.1 [16322] 0 16322 18178 8749 25 3 0 0 syz-executor.1 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 [16325] 0 16325 18244 8977 26 4 0 0 syz-executor.1 [16326] 0 16326 18244 8753 25 3 0 0 syz-executor.1 [16345] 0 16345 18178 8793 26 3 0 0 syz-executor.2 INFO: task udevd:26177 blocked for more than 140 seconds. Not tainted 4.14.135+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [16365] 0 16365 18211 9678 27 3 0 0 syz-executor.2 udevd D25696 26177 190 0x00000000 [16382] 0 16382 18145 8746 26 3 0 0 syz-executor.0 Call Trace: [16388] 0 16388 18178 8751 26 3 0 0 syz-executor.0 [16399] 0 16399 18178 8972 26 4 0 0 syz-executor.1 [16426] 0 16426 18211 8974 26 4 0 0 syz-executor.1 [16435] 0 16435 18211 8995 26 4 0 0 syz-executor.3 [16480] 0 16480 18145 8989 26 4 0 0 syz-executor.3 [16622] 0 16622 18277 8980 27 4 0 0 syz-executor.4 schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [16653] 0 16653 18145 8737 24 3 0 0 syz-executor.1 [16655] 0 16655 18145 8746 25 3 0 0 syz-executor.1 [16684] 0 16684 18244 8976 26 4 0 0 syz-executor.1 [16752] 0 16752 18178 8748 25 3 0 0 syz-executor.2 [16758] 0 16758 18211 8750 25 3 0 0 syz-executor.2 [16821] 0 16821 18145 8970 27 4 0 0 syz-executor.0 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 [17261] 0 17261 18178 8972 26 4 0 0 syz-executor.2 [17386] 0 17386 18145 8746 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 [17434] 0 17434 18211 8974 27 4 0 0 syz-executor.0 [17829] 0 17829 18145 8747 25 3 0 0 syz-executor.4 [17843] 0 17843 18244 8754 26 3 0 0 syz-executor.4 [17934] 0 17934 18145 8746 25 3 0 0 syz-executor.4 path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2356 [17936] 0 17936 18211 8994 26 4 0 0 syz-executor.3 [17954] 0 17954 18178 8991 26 4 0 0 syz-executor.3 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 [17977] 0 17977 18211 8975 27 4 0 0 syz-executor.1 [17995] 0 17995 18211 8975 27 4 0 0 syz-executor.1 SYSC_readlinkat fs/stat.c:394 [inline] SyS_readlinkat+0xbe/0x2b0 fs/stat.c:382 [18142] 0 18142 18178 8973 27 4 0 0 syz-executor.0 [18192] 0 18192 18145 8745 25 3 0 0 syz-executor.4 [18195] 0 18195 18211 8974 27 4 0 0 syz-executor.0 [18252] 0 18252 18343 8983 26 4 0 0 syz-executor.2 [18304] 0 18304 18211 8975 26 4 0 0 syz-executor.1 [18330] 0 18330 18244 8975 26 4 0 0 syz-executor.2 [18335] 0 18335 18178 8748 25 3 0 0 syz-executor.1 [18470] 0 18470 18145 8992 27 4 0 0 syz-executor.5 [18480] 0 18480 18178 8972 26 4 0 0 syz-executor.1 [18487] 0 18487 18178 8972 26 4 0 0 syz-executor.1 [18514] 0 18514 18178 13262 33 3 0 0 syz-executor.5 [18539] 0 18539 18209 13322 33 3 0 0 syz-executor.5 [18553] 0 18553 18376 8989 26 4 0 0 syz-executor.1 [18593] 0 18593 18178 8974 26 4 0 0 syz-executor.2 [18639] 0 18639 34662 9018 28 4 0 0 syz-executor.1 [18671] 0 18671 34662 9018 28 4 0 0 syz-executor.1 [18732] 0 18732 18178 8971 26 4 0 0 syz-executor.2 [18827] 0 18827 18178 8981 26 4 0 0 syz-executor.4 [18864] 0 18864 18310 8979 26 4 0 0 syz-executor.2 [18909] 0 18909 18178 8971 26 4 0 0 syz-executor.2 [18915] 0 18915 18244 8976 27 4 0 0 syz-executor.0 [18951] 0 18951 18244 8976 27 4 0 0 syz-executor.0 [19202] 0 19202 18178 8749 25 3 0 0 syz-executor.3 [19206] 0 19206 18211 8751 25 3 0 0 syz-executor.3 [19213] 0 19213 18178 8749 25 3 0 0 syz-executor.1 [19219] 0 19219 18211 8751 25 3 0 0 syz-executor.1 [19351] 0 19351 18145 8967 25 4 0 0 syz-executor.4 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 [19418] 0 19418 18178 8970 27 4 0 0 syz-executor.0 [19528] 0 19528 18178 8990 26 4 0 0 syz-executor.3 INFO: task udevd:26178 blocked for more than 140 seconds. [19609] 0 19609 18178 8971 26 4 0 0 syz-executor.2 Not tainted 4.14.135+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D26272 26178 190 0x00000000 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 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 may_lookup fs/namei.c:1731 [inline] link_path_walk+0x8a6/0x1110 fs/namei.c:2111 [19684] 0 19684 18244 8977 26 4 0 0 syz-executor.2 [19701] 0 19701 18244 8976 26 4 0 0 syz-executor.1 [19757] 0 19757 18211 8972 26 4 0 0 syz-executor.4 [19837] 0 19837 18211 8993 27 4 0 0 syz-executor.5 [19840] 0 19840 18178 8990 26 4 0 0 syz-executor.3 [19854] 0 19854 18178 8749 25 3 0 0 syz-executor.3 [19857] 0 19857 18244 8755 25 3 0 0 syz-executor.3 path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2356 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 SYSC_readlinkat fs/stat.c:394 [inline] SyS_readlinkat+0xbe/0x2b0 fs/stat.c:382 [19895] 0 19895 18244 8974 27 4 0 0 syz-executor.4 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 INFO: task udevd:26180 blocked for more than 140 seconds. [19952] 0 19952 18145 8736 24 3 0 0 syz-executor.2 Not tainted 4.14.135+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D28296 26180 190 0x00000000 [19967] 0 19967 18178 8748 25 3 0 0 syz-executor.2 [20015] 0 20015 18178 9004 26 4 0 0 syz-executor.3 [20034] 0 20034 18244 9009 27 4 0 0 syz-executor.3 Call Trace: [20041] 0 20041 34629 9018 28 4 0 0 syz-executor.1 [20048] 0 20048 18244 8994 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 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [20055] 0 20055 18145 8747 26 3 0 0 syz-executor.5 kernfs_iop_getattr+0x85/0xd0 fs/kernfs/inode.c:209 vfs_getattr_nosec+0x107/0x170 fs/stat.c:79 vfs_getattr+0x3f/0x60 fs/stat.c:116 vfs_statx+0x100/0x180 fs/stat.c:189 [20061] 0 20061 18178 8753 26 3 0 0 syz-executor.5 [20069] 0 20069 18178 8748 26 3 0 0 syz-executor.0 [20076] 0 20076 34629 9018 28 4 0 0 syz-executor.1 [20078] 0 20078 18211 8750 26 3 0 0 syz-executor.0 vfs_stat include/linux/fs.h:3085 [inline] SYSC_newstat fs/stat.c:337 [inline] SyS_newstat+0x96/0x110 fs/stat.c:333 [20080] 0 20080 18244 8994 26 4 0 0 syz-executor.3 [20194] 0 20194 18211 8976 26 4 0 0 syz-executor.1 [20261] 0 20261 18211 8973 26 4 0 0 syz-executor.2 [20328] 0 20328 18145 8746 26 3 0 0 syz-executor.0 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 [20330] 0 20330 18211 8975 27 4 0 0 syz-executor.0 [20331] 0 20331 18178 8749 26 3 0 0 syz-executor.0 [20332] 0 20332 18178 8749 26 3 0 0 syz-executor.0 INFO: task udevd:26181 blocked for more than 140 seconds. Not tainted 4.14.135+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D25600 26181 190 0x00000000 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [20358] 0 20358 18178 8989 26 4 0 0 syz-executor.3 [20410] 0 20410 18178 8971 26 4 0 0 syz-executor.2 [20435] 0 20435 18211 8976 26 4 0 0 syz-executor.1 [20506] 0 20506 18244 8978 26 4 0 0 syz-executor.2 [20510] 0 20510 18178 8750 26 3 0 0 syz-executor.5 [20513] 0 20513 18244 9003 27 4 0 0 syz-executor.5 [20515] 0 20515 18211 8752 26 3 0 0 syz-executor.5 [20522] 0 20522 18244 8752 26 3 0 0 syz-executor.5 [20602] 0 20602 18178 8999 26 4 0 0 syz-executor.3 [20608] 0 20608 18178 8999 26 4 0 0 syz-executor.3 [20616] 0 20616 18178 8974 26 4 0 0 syz-executor.4 [20632] 0 20632 18178 8748 25 3 0 0 syz-executor.1 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 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 [20633] 0 20633 18178 8748 25 3 0 0 syz-executor.1 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 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 [20635] 0 20635 18178 8748 25 3 0 0 syz-executor.1 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 INFO: task udevd:26186 blocked for more than 140 seconds. [20636] 0 20636 18211 8750 25 3 0 0 syz-executor.1 Not tainted 4.14.135+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [20720] 0 20720 18211 8975 26 4 0 0 syz-executor.1 udevd D28072 26186 190 0x00000000 [20738] 0 20738 18145 8994 27 4 0 0 syz-executor.5 Call Trace: [20759] 0 20759 18211 8975 27 4 0 0 syz-executor.2 [20796] 0 20796 18178 8992 26 4 0 0 syz-executor.3 [21185] 0 21185 18178 8972 26 4 0 0 syz-executor.1 [21214] 0 21214 18178 8738 24 3 0 0 syz-executor.2 schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [21217] 0 21217 18178 8747 25 3 0 0 syz-executor.2 [21272] 0 21272 18145 8987 26 4 0 0 syz-executor.3 [21302] 0 21302 18178 8975 28 4 0 0 syz-executor.0 kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 [21341] 0 21341 18145 8971 26 4 0 0 syz-executor.1 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 [21434] 0 21434 18145 8747 25 3 0 0 syz-executor.1 [21438] 0 21438 18211 8751 25 3 0 0 syz-executor.1 [21440] 0 21440 18211 8975 26 4 0 0 syz-executor.1 path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2356 [21520] 0 21520 18178 8749 25 3 0 0 syz-executor.4 [21545] 0 21545 18343 10518 30 4 0 0 syz-executor.2 [21560] 0 21560 18178 8972 26 4 0 0 syz-executor.1 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 [21594] 0 21594 18211 8974 26 4 0 0 syz-executor.1 SYSC_readlinkat fs/stat.c:394 [inline] SyS_readlinkat+0xbe/0x2b0 fs/stat.c:382 [21611] 0 21611 18178 8972 26 4 0 0 syz-executor.1 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 [21622] 0 21622 18145 8990 28 4 0 0 syz-executor.3 [21741] 0 21741 18178 8975 26 4 0 0 syz-executor.1 [21771] 0 21771 18145 8736 24 3 0 0 syz-executor.2 INFO: task udevd:26188 blocked for more than 140 seconds. [21864] 0 21864 18244 8976 26 4 0 0 syz-executor.2 Not tainted 4.14.135+ #26 [21873] 0 21873 18145 8970 26 4 0 0 syz-executor.4 [21896] 0 21896 18145 8745 25 3 0 0 syz-executor.2 [21983] 0 21983 18145 8988 26 4 0 0 syz-executor.3 [21997] 0 21997 18178 8748 26 3 0 0 syz-executor.0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D26976 26188 190 0x00000000 Call Trace: [21998] 0 21998 18244 8976 27 4 0 0 syz-executor.0 schedule+0x92/0x1c0 kernel/sched/core.c:3498 [21999] 0 21999 18178 8748 26 3 0 0 syz-executor.0 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 [22003] 0 22003 18244 8752 26 3 0 0 syz-executor.0 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893 [22005] 0 22005 18244 8752 26 3 0 0 syz-executor.0 [22144] 0 22144 18244 8976 27 4 0 0 syz-executor.0 kernfs_dop_revalidate+0x8d/0x370 fs/kernfs/dir.c:570 d_revalidate fs/namei.c:799 [inline] lookup_fast+0x927/0xea0 fs/namei.c:1658 [22146] 0 22146 18145 8747 25 3 0 0 syz-executor.4 walk_component+0xd3/0xbf0 fs/namei.c:1835 [22147] 0 22147 18211 8975 26 4 0 0 syz-executor.4 [22239] 0 22239 18277 8998 26 4 0 0 syz-executor.3 [22261] 0 22261 18277 8998 26 4 0 0 syz-executor.3 link_path_walk+0x84a/0x1110 fs/namei.c:2168 [22462] 0 22462 18145 8746 25 3 0 0 syz-executor.3 [22466] 0 22466 18244 9000 26 4 0 0 syz-executor.3 path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2356 [22467] 0 22467 18178 8748 25 3 0 0 syz-executor.3 [22470] 0 22470 18211 8750 25 3 0 0 syz-executor.3 filename_lookup+0x1a1/0x3b0 fs/namei.c:2391 [22475] 0 22475 18244 8752 25 3 0 0 syz-executor.3 [22724] 0 22724 18178 11809 31 4 0 0 syz-executor.4 [22831] 0 22831 18145 8988 26 4 0 0 syz-executor.3 SYSC_readlinkat fs/stat.c:394 [inline] SyS_readlinkat+0xbe/0x2b0 fs/stat.c:382 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.?}, at: [<00000000dd936af1>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 3 locks held by udevd/190: #0: (&dup_mmap_sem){.+.+}, at: [<00000000f4f5b6b9>] dup_mmap kernel/fork.c:609 [inline] #0: (&dup_mmap_sem){.+.+}, at: [<00000000f4f5b6b9>] dup_mm kernel/fork.c:1211 [inline] #0: (&dup_mmap_sem){.+.+}, at: [<00000000f4f5b6b9>] copy_mm kernel/fork.c:1266 [inline] #0: (&dup_mmap_sem){.+.+}, at: [<00000000f4f5b6b9>] copy_process.part.0+0x1fd6/0x68b0 kernel/fork.c:1789 #1: (&mm->mmap_sem){++++}, at: [<00000000d4266cac>] dup_mmap kernel/fork.c:610 [inline] #1: (&mm->mmap_sem){++++}, at: [<00000000d4266cac>] dup_mm kernel/fork.c:1211 [inline] #1: (&mm->mmap_sem){++++}, at: [<00000000d4266cac>] copy_mm kernel/fork.c:1266 [inline] #1: (&mm->mmap_sem){++++}, at: [<00000000d4266cac>] copy_process.part.0+0x1ff2/0x68b0 kernel/fork.c:1789 #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000b71f412f>] dup_mmap kernel/fork.c:619 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000b71f412f>] dup_mm kernel/fork.c:1211 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000b71f412f>] copy_mm kernel/fork.c:1266 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000b71f412f>] copy_process.part.0+0x203a/0x68b0 kernel/fork.c:1789 1 lock held by rsyslogd/1630: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by cron/1673: #0: (&ei->i_mmap_sem){++++}, at: [<0000000045873517>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 2 locks held by getty/1759: #0: (&tty->ldisc_sem){++++}, at: [<000000000aeb5305>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<0000000028fead91>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-fuzzer/1781: #0: (&ei->i_mmap_sem){++++}, at: [<0000000045873517>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by syz-fuzzer/1791: #0: (&ei->i_mmap_sem){++++}, at: [<0000000045873517>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/3038: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/25935: #0: ( [22853] 0 22853 18177 8993 26 4 0 0 syz-executor.3 &mm->mmap_sem [22868] 0 22868 18211 8975 26 4 0 0 syz-executor.1 ){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/25954: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/25969: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/25971: #0: (&ei->i_mmap_sem){++++}, at: [<0000000045873517>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 [23096] 0 23096 18178 13293 32 3 0 0 syz-executor.4 1 lock held by blkid/25975: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/25977: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/25981: [23108] 0 23108 18178 11757 30 3 0 0 syz-executor.4 #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/25978: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/25982: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/25983: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/25984: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26030: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26033: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26034: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/26035: [23131] 0 23131 18145 8747 25 3 0 0 syz-executor.1 #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26036: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26037: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26038: [23134] 0 23134 18211 8751 25 3 0 0 syz-executor.1 #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/26039: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26040: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/26045: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/26166: #0: (kernfs_mutex){+.+.}, at: [<000000005664d0eb>] kernfs_dop_revalidate+0x8d/0x370 fs/kernfs/dir.c:570 1 lock held by blkid/26167: #0: (kernfs_mutex){+.+.}, at: [<000000005f445f4d>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 1 lock held by udevd/26168: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by udevd/26170: [23170] 0 23170 18178 8972 26 4 0 0 syz-executor.4 #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/26171: #0: (&ei->i_mmap_sem){++++}, at: [<0000000045873517>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/26172: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/26174: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by blkid/26175: #0: (&mm->mmap_sem){++++}, at: [<000000001951196b>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 [23171] 0 23171 18178 8972 26 4 0 0 syz-executor.4 1 lock held by udevd/26176: #0: (&ei->i_mmap_sem){++++}, at: [<0000000045873517>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by udevd/26177: #0: (kernfs_mutex){+.+.}, at: [<000000005f445f4d>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 1 lock held by udevd/26178: #0: (kernfs_mutex){+.+.}, at: [<000000005f445f4d>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 1 lock held by udevd/26180: #0: (kernfs_mutex){+.+.}, at: [<0000000052cdcda2>] kernfs_iop_getattr+0x85/0xd0 fs/kernfs/inode.c:209 1 lock held by udevd/26181: #0: (kernfs_mutex){+.+.}, at: [<000000005f445f4d>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 1 lock held by blkid/26182: #0: (&ei->i_mmap_sem){++++}, at: [<0000000045873517>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 1 lock held by blkid/26184: #0: (&mm->mmap_sem){++++}, at: [<00000000ba651771>] setup_arg_pages+0x255/0x710 fs/exec.c:734 1 lock held by blkid/26185: #0: (&mm->mmap_sem){++++}, at: [<00000000ba651771>] setup_arg_pages+0x255/0x710 fs/exec.c:734 [23190] 0 23190 18211 8992 26 4 0 0 syz-executor.3 1 lock held by udevd/26186: #0: (kernfs_mutex){+.+.}, at: [<000000005f445f4d>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301 1 lock held by udevd/26188: #0: (kernfs_mutex){+.+.}, at: [<000000005664d0eb>] kernfs_dop_revalidate+0x8d/0x370 fs/kernfs/dir.c:570 1 lock held by udevd/26189: #0: (&sig->cred_guard_mutex){+.+.}, at: [<000000003fb3dd20>] prepare_bprm_creds+0x51/0x110 fs/exec.c:1389 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.135+ #26 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 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 26111 Comm: blkid Not tainted 4.14.135+ #26 task: 00000000ca107cfd task.stack: 0000000029bf46fc RIP: 0010:__lock_acquire+0x5d2/0x4320 kernel/locking/lockdep.c:3448 RSP: 0000:ffff88814fc97330 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 0000000000000002 RCX: 1ffff11034dfb114 RDX: 0000000000000008 RSI: ffff8881a6fd8880 RDI: ffff8881a6fd8000 RBP: ffff88814fc97500 R08: 0000000000000001 R09: 0000000000000002 R10: ffff8881a6fd8880 R11: 0000000000000236 R12: ffff8881a6fd88a2 R13: 0000000000040236 R14: ffff8881a6fd8000 R15: 0000000000000000 FS: 00007fad0042e740(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc4fea26000 CR3: 000000016e0a8004 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x12b/0x360 kernel/locking/lockdep.c:3991 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] __list_lru_count_one mm/list_lru.c:167 [inline] list_lru_count_one+0x7f/0x1d0 mm/list_lru.c:178 list_lru_shrink_count include/linux/list_lru.h:118 [inline] super_cache_count+0x133/0x2b0 fs/super.c:143 do_shrink_slab mm/vmscan.c:329 [inline] shrink_slab.part.0+0x255/0xae0 mm/vmscan.c:505 shrink_slab mm/vmscan.c:469 [inline] shrink_node+0x895/0xc30 mm/vmscan.c:2671 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:1120 RIP: 07ff:0xa6b320 RSP: ff552f10:0000000000a6aeb0 EFLAGS: 00000001 Code: c0 44 8b 4c 24 68 44 8b 5c 24 60 0f 84 e9 03 00 00 4c 89 d6 ba 08 00 00 00 4c 89 f7 44 89 5c 24 60 44 89 4c 24 68 4c 89 54 24 70 29 e4 ff ff 4c 8b 54 24 70 85 c0 44 8b 4c 24 68 44 8b 5c 24