(unnamed net_device) (uninitialized): Unable to set down delay as MII monitoring is disabled INFO: task syz-executor.0:22003 blocked for more than 140 seconds. Not tainted 4.19.84 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29304 22003 16870 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write_nested+0x57/0x90 kernel/locking/rwsem.c:194 inode_lock_nested include/linux/fs.h:782 [inline] filename_create+0x17c/0x4f0 fs/namei.c:3635 user_path_create fs/namei.c:3693 [inline] do_mknodat fs/namei.c:3754 [inline] do_mknodat+0x1a4/0x480 fs/namei.c:3742 __do_sys_mknod fs/namei.c:3794 [inline] __se_sys_mknod fs/namei.c:3792 [inline] __x64_sys_mknod+0x7b/0xb0 fs/namei.c:3792 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a669 Code: 1e b0 f3 44 0f 6f 64 1e c0 f3 44 0f 6f 6c 1e d0 f3 44 0f 6f 74 1e e0 f3 44 0f 6f 7c 1e f0 f3 0f 7f 07 f3 0f 7f 4f 10 f3 0f 7f <57> 20 f3 0f 7f 5f 30 f3 0f 7f 67 40 f3 0f 7f 6f 50 f3 0f 7f 77 60 RSP: 002b:00007fe06a3d2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669 RDX: 0000000000000000 RSI: 0000000000002000 RDI: 00000000200004c0 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe06a3d36d4 R13: 00000000004c7073 R14: 00000000004dc7c0 R15: 00000000ffffffff INFO: task syz-executor.0:22283 blocked for more than 140 seconds. Not tainted 4.19.84 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27944 22283 16870 0x00000004 Call Trace: context_switch kernel/sched/core.c:2826 [inline] __schedule+0x866/0x1dc0 kernel/sched/core.c:3515 schedule+0x92/0x1c0 kernel/sched/core.c:3559 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:747 [inline] lock_mount+0x8c/0x2e0 fs/namespace.c:2039 do_add_mount+0x27/0x380 fs/namespace.c:2416 do_new_mount fs/namespace.c:2483 [inline] do_mount+0x160a/0x2bc0 fs/namespace.c:2799 ksys_mount+0xdb/0x150 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a669 Code: Bad RIP value. RSP: 002b:00007fe06a3b1c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a669 RDX: 0000000020000300 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 000000000075c070 R08: 00000000200005c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe06a3b26d4 R13: 00000000004c7178 R14: 00000000004dc9a0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1039: #0: 000000007c692ba5 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4438 1 lock held by rsyslogd/7386: #0: 000000003af107da (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:767 2 locks held by getty/7508: #0: 0000000095977e16 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000c32fd0bb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7509: #0: 000000006a48bd57 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000c403b7e6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7510: #0: 000000009bb4b660 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000c44acabd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7511: #0: 00000000651e249b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 00000000d9827e10 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7512: #0: 00000000e3ee97ff (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000004661d2a5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7513: #0: 00000000db6c78d5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000002c4e8b3f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by getty/7514: #0: 00000000b0d6e17f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:362 #1: 000000003ff2ee39 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 2 locks held by syz-executor.0/21924: #0: 00000000576459a8 (sb_writers#22){.+.+}, at: sb_start_write include/linux/fs.h:1578 [inline] #0: 00000000576459a8 (sb_writers#22){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 000000004cfa7b6e (&sb->s_type->i_mutex_key#28/1){+.+.}, at: inode_lock_nested include/linux/fs.h:782 [inline] #1: 000000004cfa7b6e (&sb->s_type->i_mutex_key#28/1){+.+.}, at: filename_create+0x17c/0x4f0 fs/namei.c:3635 2 locks held by syz-executor.0/22003: #0: 00000000576459a8 (sb_writers#22){.+.+}, at: sb_start_write include/linux/fs.h:1578 [inline] #0: 00000000576459a8 (sb_writers#22){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 000000004cfa7b6e (&sb->s_type->i_mutex_key#28/1){+.+.}, at: inode_lock_nested include/linux/fs.h:782 [inline] #1: 000000004cfa7b6e (&sb->s_type->i_mutex_key#28/1){+.+.}, at: filename_create+0x17c/0x4f0 fs/namei.c:3635 1 lock held by syz-executor.0/22283: #0: 000000004cfa7b6e (&sb->s_type->i_mutex_key#29){+.+.}, at: inode_lock include/linux/fs.h:747 [inline] #0: 000000004cfa7b6e (&sb->s_type->i_mutex_key#29){+.+.}, at: lock_mount+0x8c/0x2e0 fs/namespace.c:2039 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 4.19.84 #0 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+0x197/0x210 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x354/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60