device ifb0 entered promiscuous mode INFO: task rs:main Q:Reg:4382 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. rs:main Q:Reg D17768 4382 1 0x00000000 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_complete_transaction+0x188/0x1f0 fs/jbd2/journal.c:781 ext4_sync_file+0x11f6/0x1490 fs/ext4/fsync.c:154 vfs_fsync_range+0x140/0x220 fs/sync.c:197 generic_write_sync include/linux/fs.h:2710 [inline] ext4_file_write_iter+0x6a3/0x1430 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1795 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6c6/0x9f0 fs/read_write.c:487 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f091221719d Code: Bad RIP value. RSP: 002b:00007f09107b8000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000056 RCX: 00007f091221719d RDX: 0000000000000056 RSI: 00000000006b7a90 RDI: 0000000000000005 RBP: 00000000006b7a90 R08: 00000000006b7a90 R09: 2065636976656420 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f09107b8480 R14: 0000000000000001 R15: 00000000006b7890 INFO: task syz-executor2:4522 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D21224 4522 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1770 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_unlink+0x84a/0x11f0 fs/ext4/namei.c:3046 vfs_unlink+0x2db/0x510 fs/namei.c:4010 do_unlinkat+0x6cc/0xa30 fs/namei.c:4073 __do_sys_unlink fs/namei.c:4120 [inline] __se_sys_unlink fs/namei.c:4118 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4118 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455877 Code: 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 <40> 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 RSP: 002b:00007ffcfef51e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455877 RDX: 0000000000ea099b RSI: 00007ffcfef51eb0 RDI: 00007ffcfef51eb0 RBP: 00007ffcfef53bc0 R08: 0000000000000000 R09: 000000000000000f R10: 000000000000000a R11: 0000000000000206 R12: 0000000000ea0940 R13: 0000000000000000 R14: 000000000000021c R15: 000000000001dc39 INFO: task syz-executor4:10179 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D26296 10179 4527 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1770 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_symlink+0x8ab/0x1170 fs/ext4/namei.c:3166 vfs_symlink+0x37a/0x5d0 fs/namei.c:4137 do_symlinkat+0x242/0x2d0 fs/namei.c:4164 __do_sys_symlink fs/namei.c:4183 [inline] __se_sys_symlink fs/namei.c:4181 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4181 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455857 Code: c1 0f 84 74 fd ff ff c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac <24> 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 RSP: 002b:00007fff55579328 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000051 RCX: 0000000000455857 RDX: 0000000000000000 RSI: 00000000004bafe2 RDI: 00007fff5557a020 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000002065940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380 INFO: task syz-executor3:10180 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D26296 10180 4524 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1770 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_symlink+0x8ab/0x1170 fs/ext4/namei.c:3166 vfs_symlink+0x37a/0x5d0 fs/namei.c:4137 do_symlinkat+0x242/0x2d0 fs/namei.c:4164 __do_sys_symlink fs/namei.c:4183 [inline] __se_sys_symlink fs/namei.c:4181 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4181 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455857 Code: c1 0f 84 74 fd ff ff c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac <24> 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 RSP: 002b:00007ffc70ad3c48 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000057 RCX: 0000000000455857 RDX: 0000000000000000 RSI: 00000000004bafe2 RDI: 00007ffc70ad4940 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000001d01940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380 INFO: task syz-executor5:10181 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D26296 10181 4525 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1770 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_symlink+0x8ab/0x1170 fs/ext4/namei.c:3166 vfs_symlink+0x37a/0x5d0 fs/namei.c:4137 do_symlinkat+0x242/0x2d0 fs/namei.c:4164 __do_sys_symlink fs/namei.c:4183 [inline] __se_sys_symlink fs/namei.c:4181 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4181 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455857 Code: c1 0f 84 74 fd ff ff c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac <24> 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 RSP: 002b:00007ffc5b9917e8 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 000000000000005b RCX: 0000000000455857 RDX: 0000000000000000 RSI: 00000000004bafe2 RDI: 00007ffc5b9924e0 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000cde940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380 INFO: task syz-executor1:10182 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D26296 10182 4521 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1770 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_symlink+0x8ab/0x1170 fs/ext4/namei.c:3166 vfs_symlink+0x37a/0x5d0 fs/namei.c:4137 do_symlinkat+0x242/0x2d0 fs/namei.c:4164 __do_sys_symlink fs/namei.c:4183 [inline] __se_sys_symlink fs/namei.c:4181 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4181 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455857 Code: c1 0f 84 74 fd ff ff c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac <24> 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 RSP: 002b:00007ffcdff67c68 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000058 RCX: 0000000000455857 RDX: 0000000000000000 RSI: 00000000004bafe2 RDI: 00007ffcdff68960 RBP: 0000000000000013 R08: 0000000000000000 R09: 00000000013b0940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380 INFO: task syz-executor7:10183 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D26296 10183 4523 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1770 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_symlink+0x8ab/0x1170 fs/ext4/namei.c:3166 vfs_symlink+0x37a/0x5d0 fs/namei.c:4137 do_symlinkat+0x242/0x2d0 fs/namei.c:4164 __do_sys_symlink fs/namei.c:4183 [inline] __se_sys_symlink fs/namei.c:4181 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4181 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455857 Code: c1 0f 84 74 fd ff ff c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac <24> 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 RSP: 002b:00007ffecffefbb8 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000060 RCX: 0000000000455857 RDX: 0000000000000000 RSI: 00000000004bafe2 RDI: 00007ffecfff08b0 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000001283940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380 INFO: task syz-executor0:10184 blocked for more than 120 seconds. Not tainted 4.18.0-rc1+ #110 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D26296 10184 4520 0x00000004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3504 schedule+0xfb/0x450 kernel/sched/core.c:3548 jbd2_log_wait_commit+0x329/0x4b0 fs/jbd2/journal.c:726 jbd2_journal_stop+0xb54/0x15c0 fs/jbd2/transaction.c:1770 __ext4_journal_stop+0xde/0x1f0 fs/ext4/ext4_jbd2.c:103 ext4_symlink+0x8ab/0x1170 fs/ext4/namei.c:3166 vfs_symlink+0x37a/0x5d0 fs/namei.c:4137 do_symlinkat+0x242/0x2d0 fs/namei.c:4164 __do_sys_symlink fs/namei.c:4183 [inline] __se_sys_symlink fs/namei.c:4181 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4181 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455857 Code: c1 0f 84 74 fd ff ff c6 84 24 60 01 00 00 00 48 8b ac 24 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 8b ac <24> 38 01 00 00 48 81 c4 40 01 00 00 c3 c6 84 24 60 01 00 00 00 48 RSP: 002b:00007ffe03484c28 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000053 RCX: 0000000000455857 RDX: 0000000000000000 RSI: 00000000004bafe2 RDI: 00007ffe03485920 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000b3d940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000013 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000001380 Showing all locks held in the system: 1 lock held by khungtaskd/899: #0: 000000002f382cdc (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4461 2 locks held by rs:main Q:Reg/4382: #0: 0000000022009760 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 #1: 0000000060c19123 (sb_writers#6){.+.+}, at: file_start_write include/linux/fs.h:2739 [inline] #1: 0000000060c19123 (sb_writers#6){.+.+}, at: vfs_write+0x452/0x560 fs/read_write.c:548 1 lock held by rsyslogd/4384: 2 locks held by getty/4475: #0: 00000000afbd94e0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000009ecff205 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2131 2 locks held by getty/4476: #0: 00000000e94d80d0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000054cdfb5f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2131 2 locks held by getty/4477: #0: 0000000001be9091 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000001b1d5bd5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2131 2 locks held by getty/4478: #0: 0000000074afcedc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000ce6e1538 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2131 2 locks held by getty/4479: #0: 000000003ac9d4eb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000b5e33c2a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2131 2 locks held by getty/4480: #0: 000000003fa6b007 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000808d37d2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2131 2 locks held by getty/4481: #0: 00000000b019803d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000063de2d2e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2131 3 locks held by syz-executor2/4522: #0: 0000000060c19123 (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 0000000060c19123 (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 0000000082e24c49 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 0000000082e24c49 (&type->i_mutex_dir_key/1){+.+.}, at: do_unlinkat+0x3d8/0xa30 fs/namei.c:4059 #2: 00000000caaee147 (&sb->s_type->i_mutex_key#12){++++}, at: inode_lock include/linux/fs.h:715 [inline] #2: 00000000caaee147 (&sb->s_type->i_mutex_key#12){++++}, at: vfs_unlink+0xd1/0x510 fs/namei.c:4001 1 lock held by syz-executor6/10177: 2 locks held by syz-executor4/10179: #0: 0000000060c19123 (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 0000000060c19123 (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000a5acd8da (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 00000000a5acd8da (&type->i_mutex_dir_key/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3645 2 locks held by syz-executor3/10180: #0: 0000000060c19123 (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 0000000060c19123 (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 000000002e3e4efd (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 000000002e3e4efd (&type->i_mutex_dir_key/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3645 2 locks held by syz-executor5/10181: #0: 0000000060c19123 (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 0000000060c19123 (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 0000000033b8dc98 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 0000000033b8dc98 (&type->i_mutex_dir_key/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3645 2 locks held by syz-executor1/10182: #0: 0000000060c19123 (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 0000000060c19123 (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000494f27aa (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 00000000494f27aa (&type->i_mutex_dir_key/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3645 2 locks held by syz-executor7/10183: #0: 0000000060c19123 (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 0000000060c19123 (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 0000000024935440 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 0000000024935440 (&type->i_mutex_dir_key/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3645 2 locks held by syz-executor0/10184: #0: 0000000060c19123 (sb_writers#6){.+.+}, at: sb_start_write include/linux/fs.h:1554 [inline] #0: 0000000060c19123 (sb_writers#6){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 0000000037e4bbf3 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:750 [inline] #1: 0000000037e4bbf3 (&type->i_mutex_dir_key/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3645 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 899 Comm: khungtaskd Not tainted 4.18.0-rc1+ #110 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+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x151/0x192 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:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x9c4/0xf80 kernel/hung_task.c:252 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10177 Comm: syz-executor6 Not tainted 4.18.0-rc1+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_is_held_type+0x197/0x210 kernel/locking/lockdep.c:3967 Code: 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 63 48 83 3d e4 8c 93 07 00 74 30 48 89 df 57 9d 0f 1f 44 00 00 48 83 c4 08 44 89 e8 <5b> 41 5c 41 5d 5d c3 48 83 c4 08 41 bd 01 00 00 00 5b 44 89 e8 41 RSP: 0018:ffff8801c3217420 EFLAGS: 00000092 RAX: 0000000000000001 RBX: 0000000000000082 RCX: 1ffffffff11e35fd RDX: 1ffffffff11e35fd RSI: 0000000000000000 RDI: 0000000000000082 RBP: ffff8801c3217438 R08: ffffed003b5c5939 R09: ffffed003b5c5938 R10: ffffed003b5c5938 R11: ffff8801dae2c9c3 R12: ffff8801cafb2240 R13: 0000000000000001 R14: 000000000002c9c0 R15: ffff8801dae2c9c0 FS: 00007f17dada2700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e224000 CR3: 00000001d794c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:344 [inline] update_rq_clock+0x134/0x180 kernel/sched/core.c:197 __schedule+0x2df/0x1ed0 kernel/sched/core.c:3447 schedule+0xfb/0x450 kernel/sched/core.c:3548 tun_ring_recv drivers/net/tun.c:2175 [inline] tun_do_read+0x1bd7/0x2630 drivers/net/tun.c:2202 tun_chr_read_iter+0xe5/0x1e0 drivers/net/tun.c:2234 call_read_iter include/linux/fs.h:1789 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x6d8/0xa80 fs/read_write.c:418 vfs_read+0x17f/0x3d0 fs/read_write.c:452 ksys_pread64+0x181/0x1b0 fs/read_write.c:626 __do_sys_pread64 fs/read_write.c:636 [inline] __se_sys_pread64 fs/read_write.c:633 [inline] __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b29 Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f17dada1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f17dada26d4 RCX: 0000000000455b29 RDX: 00000000000002ae RSI: 0000000020000240 RDI: 0000000000000014 RBP: 000000000072bf50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004c075a R14: 00000000004d0150 R15: 0000000000000001