INFO: task syz-executor.2:3157 blocked for more than 143 seconds. Not tainted 5.11.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28984 pid: 3157 ppid: 8582 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] vfs_setxattr+0x117/0x320 fs/xattr.c:290 setxattr+0x1ff/0x290 fs/xattr.c:553 path_setxattr+0x170/0x190 fs/xattr.c:572 __do_sys_setxattr fs/xattr.c:587 [inline] __se_sys_setxattr fs/xattr.c:583 [inline] __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:583 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f7f61241188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000020000000 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 0000000000a9fb1f R14: 00007f7f61241300 R15: 0000000000022000 INFO: task syz-executor.2:3158 blocked for more than 143 seconds. Not tainted 5.11.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27808 pid: 3158 ppid: 8582 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] lock_mount+0x8a/0x2e0 fs/namespace.c:2198 do_new_mount_fc fs/namespace.c:2824 [inline] do_new_mount fs/namespace.c:2883 [inline] path_mount+0x1787/0x20c0 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount fs/namespace.c:3409 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f7f61220188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002100 RSI: 00000000200020c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 0000000000a9fb1f R14: 00007f7f61220300 R15: 0000000000022000 INFO: task syz-executor.2:3188 blocked for more than 144 seconds. Not tainted 5.11.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28944 pid: 3188 ppid: 8582 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] vfs_setxattr+0x117/0x320 fs/xattr.c:290 setxattr+0x1ff/0x290 fs/xattr.c:553 path_setxattr+0x170/0x190 fs/xattr.c:572 __do_sys_setxattr fs/xattr.c:587 [inline] __se_sys_setxattr fs/xattr.c:583 [inline] __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:583 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f7f611bd188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 000000000056c2a8 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000020000000 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c2a8 R13: 0000000000a9fb1f R14: 00007f7f611bd300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:5/253: #0: ffff8880b9c34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1320 [inline] #0: ffff8880b9c34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4995 #1: ffffc9000120fda8 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250 1 lock held by khungtaskd/1652: #0: ffffffff8bd73da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 2 locks held by systemd-journal/4885: #0: ffff8880b9c34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1320 [inline] #0: ffff8880b9c34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4995 #1: ffff8880b9c20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 1 lock held by in:imklog/8160: #0: ffff8880158f1c70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 2 locks held by agetty/8163: #0: ffff88801c6be098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc900011cc2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x21d/0x1aa0 drivers/tty/n_tty.c:2155 2 locks held by agetty/8179: #0: ffff888021ddd098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc900011f82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x21d/0x1aa0 drivers/tty/n_tty.c:2155 2 locks held by syz-executor.2/3142: 2 locks held by syz-executor.2/3157: #0: ffff888067840460 (sb_writers#14){.+.+}-{0:0}, at: path_setxattr+0xb5/0x190 fs/xattr.c:570 #1: ffff88806c4de690 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff88806c4de690 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x117/0x320 fs/xattr.c:290 1 lock held by syz-executor.2/3158: #0: ffff88806c4de690 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88806c4de690 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 2 locks held by syz-executor.2/3188: #0: ffff888067840460 (sb_writers#14){.+.+}-{0:0}, at: path_setxattr+0xb5/0x190 fs/xattr.c:570 #1: ffff88806c4de690 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff88806c4de690 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x117/0x320 fs/xattr.c:290 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1652 Comm: khungtaskd Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd43/0xfa0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 31766 Comm: kworker/u4:10 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:mark_lock+0x2/0x1720 kernel/locking/lockdep.c:4372 Code: 0f 1f 84 00 00 00 00 00 be 00 00 01 00 48 c7 c7 80 04 1f 8f e8 5f 89 64 02 48 98 c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 <41> 56 41 55 41 54 41 89 d4 48 ba 00 00 00 00 00 fc ff df 55 53 48 RSP: 0018:ffffc900021efb88 EFLAGS: 00000002 RAX: 0000000000000004 RBX: 0000000000000000 RCX: ffffffff81585217 RDX: 0000000000000006 RSI: ffff88802bd0c108 RDI: ffff88802bd0b780 RBP: 0000000000000006 R08: 0000000000000000 R09: ffffffff8f866877 R10: fffffbfff1f0cd0e R11: 0000000000000000 R12: ffff88802bd0b780 R13: dffffc0000000000 R14: ffff88802bd0c108 R15: ffffffff889bdb50 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4d52e55000 CR3: 0000000021fdc000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4012 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4038 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4098 [inline] lockdep_hardirqs_on_prepare+0x28b/0x400 kernel/locking/lockdep.c:4050 trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 __local_bh_enable_ip+0xa0/0x110 kernel/softirq.c:201 spin_unlock_bh include/linux/spinlock.h:399 [inline] batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:467 batadv_nc_worker+0x868/0xe50 net/batman-adv/network-coding.c:718 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296