audit: type=1400 audit(1571683562.516:36): avc: denied { map } for pid=6832 comm="syz-executor275" path="/root/syz-executor275971265" dev="sda1" ino=2233 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 INFO: task init:1 blocked for more than 140 seconds. Not tainted 4.14.150 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D25168 1 0 0x00000000 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 d_wait_lookup fs/dcache.c:2479 [inline] d_alloc_parallel+0xf77/0x1800 fs/dcache.c:2561 lookup_slow+0x188/0x440 fs/namei.c:1678 walk_component+0x698/0x1d00 fs/namei.c:1824 link_path_walk+0x81f/0x10a0 fs/namei.c:2153 path_lookupat.isra.0+0xcb/0x7b0 fs/namei.c:2341 filename_lookup+0x18e/0x380 fs/namei.c:2376 user_path_at_empty+0x43/0x50 fs/namei.c:2630 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xcd/0x160 fs/stat.c:185 vfs_stat include/linux/fs.h:3060 [inline] SYSC_newstat+0x95/0x100 fs/stat.c:337 SyS_newstat+0x1e/0x30 fs/stat.c:333 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7fa47a700c65 RSP: 002b:00007ffe5eb395a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 00007ffe5eb397e0 RCX: 00007fa47a700c65 RDX: 00007ffe5eb397e0 RSI: 00007ffe5eb397e0 RDI: 0000000000407545 RBP: 0000000000000000 R08: 0000000001d2ab60 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00007ffe5eb39ce0 R14: 0000000000000000 R15: 0000000000000000 INFO: task cron:6730 blocked for more than 140 seconds. Not tainted 4.14.150 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. cron D25968 6730 1 0x00000000 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 fuse_lock_inode+0xbc/0xf0 fs/fuse/inode.c:365 fuse_lookup+0x7a/0x380 fs/fuse/dir.c:360 lookup_slow+0x226/0x440 fs/namei.c:1695 walk_component+0x698/0x1d00 fs/namei.c:1824 link_path_walk+0x81f/0x10a0 fs/namei.c:2153 path_lookupat.isra.0+0xcb/0x7b0 fs/namei.c:2341 filename_lookup+0x18e/0x380 fs/namei.c:2376 user_path_at_empty+0x43/0x50 fs/namei.c:2630 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0xcd/0x160 fs/stat.c:185 vfs_stat include/linux/fs.h:3060 [inline] SYSC_newstat+0x95/0x100 fs/stat.c:337 SyS_newstat+0x1e/0x30 fs/stat.c:333 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f09fe6c7c65 RSP: 002b:00007ffd25dbb598 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 00007f09fe745aa4 RCX: 00007f09fe6c7c65 RDX: 00007ffd25dbb5e0 RSI: 00007ffd25dbb5e0 RDI: 00007f09fe745aa4 RBP: 00007ffd25dbb6e0 R08: 0000000001eab710 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 000000000000002f R15: 0000000000000000 INFO: task syz-executor275:6832 blocked for more than 140 seconds. Not tainted 4.14.150 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor275 D28144 6832 6830 0x00000000 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 fuse_lock_inode+0xbc/0xf0 fs/fuse/inode.c:365 fuse_lookup+0x7a/0x380 fs/fuse/dir.c:360 lookup_slow+0x226/0x440 fs/namei.c:1695 walk_component+0x698/0x1d00 fs/namei.c:1824 link_path_walk+0x81f/0x10a0 fs/namei.c:2153 path_openat+0x189/0x3f70 fs/namei.c:3565 do_filp_open+0x18e/0x250 fs/namei.c:3600 do_sys_open+0x2c5/0x430 fs/open.c:1084 SYSC_open fs/open.c:1102 [inline] SyS_open+0x2d/0x40 fs/open.c:1097 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x444c90 RSP: 002b:00007ffc7a0b4ec0 EFLAGS: 00000206 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444c90 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004ae8f6 RBP: 0000000000001ab4 R08: 0000000000001ab0 R09: 0000000000c76880 R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffc7a0b50f0 R13: 00000000004075c0 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor275:6836 blocked for more than 140 seconds. Not tainted 4.14.150 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor275 D28480 6836 6832 0x00000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 fuse_lock_inode+0xbc/0xf0 fs/fuse/inode.c:365 fuse_lookup+0x7a/0x380 fs/fuse/dir.c:360 lookup_slow+0x226/0x440 fs/namei.c:1695 walk_component+0x698/0x1d00 fs/namei.c:1824 link_path_walk+0x81f/0x10a0 fs/namei.c:2153 path_openat+0x189/0x3f70 fs/namei.c:3565 do_filp_open+0x18e/0x250 fs/namei.c:3600 do_sys_open+0x2c5/0x430 fs/open.c:1084 SYSC_open fs/open.c:1102 [inline] SyS_open+0x2d/0x40 fs/open.c:1097 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x405800 RSP: 002b:00007ffc7a0b4bc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffc7a0b4bf4 RCX: 0000000000405800 RDX: 00007ffc7a0b4bfa RSI: 0000000000080001 RDI: 00000000004ae914 RBP: 00007ffc7a0b4bf0 R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000407530 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by init/1: #0: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#6){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 1 lock held by khungtaskd/1016: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544 2 locks held by udevd/3536: #0: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#6){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0xbc/0xf0 fs/fuse/inode.c:365 1 lock held by rsyslogd/6685: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xab/0xd0 fs/file.c:769 2 locks held by cron/6730: #0: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#6){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0xbc/0xf0 fs/fuse/inode.c:365 2 locks held by getty/6808: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6809: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6810: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6811: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6812: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6813: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6814: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by syz-executor275/6832: #0: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#6){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0xbc/0xf0 fs/fuse/inode.c:365 2 locks held by syz-executor275/6836: #0: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&type->i_mutex_dir_key#6){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 #1: (&fi->mutex){+.+.}, at: [] fuse_lock_inode+0xbc/0xf0 fs/fuse/inode.c:365 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1016 Comm: khungtaskd Not tainted 4.14.150 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 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:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5e7/0xb90 kernel/hung_task.c:274 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff861c3a9e