protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 INFO: task syz-executor.4:9775 blocked for more than 140 seconds. Not tainted 4.14.158-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D30000 9775 31191 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 __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_nested+0x57/0x90 kernel/locking/rwsem.c:174 inode_lock_nested include/linux/fs.h:753 [inline] filename_create+0x141/0x430 fs/namei.c:3671 user_path_create fs/namei.c:3729 [inline] SYSC_mkdirat fs/namei.c:3861 [inline] SyS_mkdirat fs/namei.c:3853 [inline] SYSC_mkdir fs/namei.c:3880 [inline] SyS_mkdir+0x92/0x200 fs/namei.c:3878 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a909 RSP: 002b:00007fe421e99c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045a909 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe421e9a6d4 R13: 00000000004c02fa R14: 00000000004de870 R15: 00000000ffffffff INFO: task syz-executor.4:9776 blocked for more than 140 seconds. Not tainted 4.14.158-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29416 9776 31191 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 __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] SYSC_chdir fs/open.c:459 [inline] SyS_chdir+0x86/0x190 fs/open.c:453 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a909 RSP: 002b:00007fe421e78c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045a909 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe421e796d4 R13: 00000000004c0363 R14: 00000000004d4bb0 R15: 00000000ffffffff INFO: task syz-executor.4:9777 blocked for more than 140 seconds. Not tainted 4.14.158-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29344 9777 31191 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 __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] do_last fs/namei.c:3330 [inline] path_openat+0x191c/0x3f70 fs/namei.c:3566 do_filp_open+0x18e/0x250 fs/namei.c:3600 do_sys_open+0x2c5/0x430 fs/open.c:1084 SYSC_openat fs/open.c:1111 [inline] SyS_openat+0x30/0x40 fs/open.c:1105 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a909 RSP: 002b:00007fe421e57c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a909 RDX: 0000000000007a05 RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001700 R11: 0000000000000246 R12: 00007fe421e586d4 R13: 00000000004c7fb3 R14: 00000000004df0e0 R15: 00000000ffffffff INFO: task syz-executor.4:9778 blocked for more than 140 seconds. Not tainted 4.14.158-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29328 9778 31191 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 __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 include/linux/namei.h:62 [inline] do_mount+0x12b/0x27d0 fs/namespace.c:2819 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: 0033:0x45a909 RSP: 002b:00007fe421e36c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a909 RDX: 0000000020000100 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000075c1c0 R08: 0000000020000340 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe421e376d4 R13: 00000000004c7cb8 R14: 00000000004deb40 R15: 00000000ffffffff INFO: task syz-executor.4:9785 blocked for more than 140 seconds. Not tainted 4.14.158-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29344 9785 31191 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 __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 include/linux/namei.h:62 [inline] do_mount+0x12b/0x27d0 fs/namespace.c:2819 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: 0033:0x45a909 RSP: 002b:00007fe421e15c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a909 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000000 RBP: 000000000075c268 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe421e166d4 R13: 00000000004c7d3a R14: 00000000004dec30 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1045: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544 3 locks held by rsyslogd/6933: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xab/0xd0 fs/file.c:769 #1: (&rq->lock){-.-.}, at: [] rq_lock kernel/sched/sched.h:1741 [inline] #1: (&rq->lock){-.-.}, at: [] __schedule+0x1da/0x1cd0 kernel/sched/core.c:3321 #2: (rcu_read_lock){....}, at: [] cpuacct_charge+0x82/0x360 kernel/sched/cpuacct.c:355 2 locks held by getty/7055: #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/7056: #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/7057: #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/7058: #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/7059: #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/7060: #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/7061: #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 1 lock held by syz-executor.4/9725: #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 2 locks held by syz-executor.4/9775: #0: (sb_writers#20){.+.+}, at: [] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#20){.+.+}, at: [] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#20/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:753 [inline] #1: (&sb->s_type->i_mutex_key#20/1){+.+.}, at: [] filename_create+0x141/0x430 fs/namei.c:3671 1 lock held by syz-executor.4/9776: #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 2 locks held by syz-executor.4/9777: #0: (sb_writers#20){.+.+}, at: [] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#20){.+.+}, at: [] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#20){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #1: (&sb->s_type->i_mutex_key#20){++++}, at: [] do_last fs/namei.c:3330 [inline] #1: (&sb->s_type->i_mutex_key#20){++++}, at: [] path_openat+0x191c/0x3f70 fs/namei.c:3566 1 lock held by syz-executor.4/9778: #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 1 lock held by syz-executor.4/9785: #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&sb->s_type->i_mutex_key#20){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1045 Comm: khungtaskd Not tainted 4.14.158-syzkaller #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+0x142/0x197 lib/dump_stack.c:58 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 0xffffffff866554ae