Bearer rejected, not supported in standalone mode Bearer rejected, not supported in standalone mode INFO: task syz-executor.2:24907 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.2 D30112 24907 7085 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: 0033:0x45a849 RSP: 002b:00007f25be9aec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045a849 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25be9af6d4 R13: 00000000004c0244 R14: 00000000004de7f0 R15: 00000000ffffffff INFO: task syz-executor.2:24908 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.2 D29520 24908 7085 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: 0033:0x45a849 RSP: 002b:00007f25be98dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045a849 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25be98e6d4 R13: 00000000004c02ad R14: 00000000004d4b30 R15: 00000000ffffffff INFO: task syz-executor.2:24909 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.2 D29344 24909 7085 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: 0033:0x45a849 RSP: 002b:00007f25be96cc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a849 RDX: 0000000020000100 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 000000000075c118 R08: 0000000020000340 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25be96d6d4 R13: 00000000004c7c02 R14: 00000000004deac0 R15: 00000000ffffffff INFO: task syz-executor.2:24912 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.2 D30096 24912 7085 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_symlinkat fs/namei.c:4173 [inline] SyS_symlinkat fs/namei.c:4160 [inline] SYSC_symlink fs/namei.c:4193 [inline] SyS_symlink+0xc4/0x210 fs/namei.c:4191 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a849 RSP: 002b:00007f25be94bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045a849 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000020001000 RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f25be94c6d4 R13: 00000000004caa3d R14: 00000000004e3dd0 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 2 locks held by getty/7036: #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/7037: #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/7038: #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/7039: #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/7040: #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/7041: #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/7042: #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-executor.2/24867: #0: (sb_writers#18){.+.+}, at: [] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#18){.+.+}, at: [] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#25/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:753 [inline] #1: (&sb->s_type->i_mutex_key#25/1){+.+.}, at: [] filename_create+0x141/0x430 fs/namei.c:3671 2 locks held by syz-executor.2/24907: #0: (sb_writers#18){.+.+}, at: [] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#18){.+.+}, at: [] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#25/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:753 [inline] #1: (&sb->s_type->i_mutex_key#25/1){+.+.}, at: [] filename_create+0x141/0x430 fs/namei.c:3671 1 lock held by syz-executor.2/24908: #0: (&sb->s_type->i_mutex_key#26){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&sb->s_type->i_mutex_key#26){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 1 lock held by syz-executor.2/24909: #0: (&sb->s_type->i_mutex_key#26){++++}, at: [] inode_lock_shared include/linux/fs.h:728 [inline] #0: (&sb->s_type->i_mutex_key#26){++++}, at: [] lookup_slow+0x138/0x440 fs/namei.c:1673 2 locks held by syz-executor.2/24912: #0: (sb_writers#18){.+.+}, at: [] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#18){.+.+}, at: [] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#25/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:753 [inline] #1: (&sb->s_type->i_mutex_key#25/1){+.+.}, at: [] filename_create+0x141/0x430 fs/namei.c:3671 ============================================= NMI backtrace for cpu 0 CPU: 0 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 31 Comm: kworker/u4:2 Not tainted 4.14.158-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker task: ffff8880a9f82100 task.stack: ffff8880a9f88000 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_release+0x44d/0x940 kernel/locking/lockdep.c:4016 RSP: 0018:ffff8880a9f8fbd0 EFLAGS: 00000282 RAX: 1ffffffff0fe2d29 RBX: 1ffff110153f1f80 RCX: 1ffff110153f052e RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 0000000000000282 RBP: ffff8880a9f8fc68 R08: ffff8880a9f82100 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8880a9f82100 R12: ffff8880a9f82100 R13: ffffffff864c8a0b R14: 0000000000000003 R15: ffff8880a9f8fc40 FS: 0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c423f44c98 CR3: 000000008e66f000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:685 [inline] batadv_nc_process_nc_paths.part.0+0x222/0x340 net/batman-adv/network-coding.c:707 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:687 [inline] batadv_nc_worker+0x4bb/0x6d0 net/batman-adv/network-coding.c:735 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 24 7c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 36 03 00 00 48 83 3d e7 cb a8 06 00 0f 84 bf 01 00 00 48 8b 7d 88 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00