audit: type=1400 audit(1561539902.623:36): avc: denied { map } for pid=7032 comm="syz-executor358" path="/root/syz-executor358861599" dev="sda1" ino=1426 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 syz-executor358:7033 blocked for more than 140 seconds. Not tainted 4.14.130 #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor358 D27664 7033 7030 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 request_wait_answer+0x33e/0x650 fs/fuse/dev.c:478 __fuse_request_send+0x10d/0x1b0 fs/fuse/dev.c:498 fuse_request_send+0x63/0x70 fs/fuse/dev.c:511 fuse_simple_request+0x2c4/0x650 fs/fuse/dev.c:569 fuse_lookup_name+0x248/0x610 fs/fuse/dir.c:323 fuse_lookup+0xdd/0x380 fs/fuse/dir.c:361 lookup_slow+0x226/0x440 fs/namei.c:1695 walk_component+0x698/0x1d00 fs/namei.c:1824 lookup_last fs/namei.c:2292 [inline] path_lookupat.isra.0+0x1bb/0x7b0 fs/namei.c:2342 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:3058 [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: 0033:0x445b99 RSP: 002b:00007f4970a28db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 00000000006dac28 RCX: 0000000000445b99 RDX: 0000000000000031 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac2c R13: 00007ffec93c4faf R14: 00007f4970a299c0 R15: 20c49ba5e353f7cf INFO: task syz-executor358:7034 blocked for more than 140 seconds. Not tainted 4.14.130 #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor358 D29360 7034 7030 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 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] lock_mount+0x8c/0x2c0 fs/namespace.c:2119 do_add_mount+0x27/0x350 fs/namespace.c:2496 do_new_mount fs/namespace.c:2563 [inline] do_mount+0x1307/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445b99 RSP: 002b:00007f4970a07db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000445b99 RDX: 0000000020000000 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 00000000006dac3c R13: 00007ffec93c4faf R14: 00007f4970a089c0 R15: 20c49ba5e353f7cf INFO: task syz-executor358:7035 blocked for more than 140 seconds. Not tainted 4.14.130 #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor358 D28904 7035 7030 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 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] fuse_reverse_inval_entry+0x97/0x600 fs/fuse/dir.c:962 fuse_notify_delete fs/fuse/dev.c:1562 [inline] fuse_notify fs/fuse/dev.c:1796 [inline] fuse_dev_do_write+0xb3d/0x2120 fs/fuse/dev.c:1871 fuse_dev_write+0x12e/0x1b0 fs/fuse/dev.c:1955 call_write_iter include/linux/fs.h:1777 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x4a7/0x6b0 fs/read_write.c:482 vfs_write+0x198/0x500 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xfd/0x230 fs/read_write.c:582 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445b99 RSP: 002b:00007f49709e6db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000006dac48 RCX: 0000000000445b99 RDX: 000000000000002e RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000006dac40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac4c R13: 00007ffec93c4faf R14: 00007f49709e79c0 R15: 20c49ba5e353f7cf INFO: task syz-executor358:7037 blocked for more than 140 seconds. Not tainted 4.14.130 #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor358 D28496 7037 7030 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 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:718 [inline] lock_mount+0x8c/0x2c0 fs/namespace.c:2119 do_add_mount+0x27/0x350 fs/namespace.c:2496 do_new_mount fs/namespace.c:2563 [inline] do_mount+0x1307/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445b99 RSP: 002b:00007f49709a4db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dac68 RCX: 0000000000445b99 RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 00000000006dac60 R08: 0000000020000400 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac6c R13: 00007ffec93c4faf R14: 00007f49709a59c0 R15: 20c49ba5e353f7cf INFO: task syz-executor358:7038 blocked for more than 140 seconds. Not tainted 4.14.130 #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor358 D29184 7038 7030 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 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x49/0xb0 kernel/locking/rwsem.c:26 inode_lock_shared include/linux/fs.h:728 [inline] lookup_slow+0x138/0x440 fs/namei.c:1673 walk_component+0x698/0x1d00 fs/namei.c:1824 lookup_last fs/namei.c:2292 [inline] path_lookupat.isra.0+0x1bb/0x7b0 fs/namei.c:2342 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:3058 [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: 0033:0x445b99 RSP: 002b:00007f4970983db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 00000000006dac78 RCX: 0000000000445b99 RDX: 0000000000000031 RSI: 0000000000000000 RDI: 0000000020000580 RBP: 00000000006dac70 R08: 00007f4970984700 R09: 0000000000000000 R10: 00007f4970984700 R11: 0000000000000246 R12: 00000000006dac7c R13: 00007ffec93c4faf R14: 00007f49709849c0 R15: 20c49ba5e353f7cf Showing all locks held in the system: 1 lock held by khungtaskd/1008: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541 2 locks held by getty/7007: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7008: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7009: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7010: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7011: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7012: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7013: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by syz-executor358/7033: #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 syz-executor358/7034: #0: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#6){++++}, at: [] lock_mount+0x8c/0x2c0 fs/namespace.c:2119 2 locks held by syz-executor358/7035: #0: (&fc->killsb){.+.+}, at: [] fuse_notify_delete fs/fuse/dev.c:1559 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_notify fs/fuse/dev.c:1796 [inline] #0: (&fc->killsb){.+.+}, at: [] fuse_dev_do_write+0x1b59/0x2120 fs/fuse/dev.c:1871 #1: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #1: (&type->i_mutex_dir_key#6){++++}, at: [] fuse_reverse_inval_entry+0x97/0x600 fs/fuse/dir.c:962 1 lock held by syz-executor358/7037: #0: (&type->i_mutex_dir_key#6){++++}, at: [] inode_lock include/linux/fs.h:718 [inline] #0: (&type->i_mutex_dir_key#6){++++}, at: [] lock_mount+0x8c/0x2c0 fs/namespace.c:2119 1 lock held by syz-executor358/7038: #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 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1008 Comm: khungtaskd Not tainted 4.14.130 #24 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+0x138/0x19c 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 0xffffffff861a673e