INFO: task syz.9.26:5809 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.9.26 state:D stack:27888 pid: 5809 ppid: 5634 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11c3/0x4350 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xdf5/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 blkdev_ioctl+0x150/0x6f0 block/ioctl.c:593 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe65d9e7e79 RSP: 002b:00007fe65d04b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe65dc52fa0 RCX: 00007fe65d9e7e79 RDX: 0000200000000380 RSI: 00000000c0481273 RDI: 0000000000000004 RBP: 00007fe65da7aee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe65dc53038 R14: 00007fe65dc52fa0 R15: 00007ffecf4fc328 INFO: task syz.9.26:5812 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.9.26 state:D stack:28784 pid: 5812 ppid: 5634 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11c3/0x4350 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xdf5/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 blkdev_common_ioctl+0x1056/0x1ed0 block/ioctl.c:532 blkdev_ioctl+0x28f/0x6f0 block/ioctl.c:598 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe65d9e7e79 RSP: 002b:00007fe65d02a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe65dc53090 RCX: 00007fe65d9e7e79 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004 RBP: 00007fe65da7aee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe65dc53128 R14: 00007fe65dc53090 R15: 00007ffecf4fc328 INFO: task syz.1.27:5963 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.27 state:D stack:27888 pid: 5963 ppid: 5857 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11c3/0x4350 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xdf5/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 blkdev_ioctl+0x150/0x6f0 block/ioctl.c:593 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7faa1ebfbe79 RSP: 002b:00007faa1e25f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007faa1ee66fa0 RCX: 00007faa1ebfbe79 RDX: 0000200000000380 RSI: 00000000c0481273 RDI: 0000000000000004 RBP: 00007faa1ec8eee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa1ee67038 R14: 00007faa1ee66fa0 R15: 00007ffd2cd23fc8 INFO: task syz.1.27:5966 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.27 state:D stack:28784 pid: 5966 ppid: 5857 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11c3/0x4350 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xdf5/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 blkdev_common_ioctl+0x1056/0x1ed0 block/ioctl.c:532 blkdev_ioctl+0x28f/0x6f0 block/ioctl.c:598 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7faa1ebfbe79 RSP: 002b:00007faa1e23e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007faa1ee67090 RCX: 00007faa1ebfbe79 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004 RBP: 00007faa1ec8eee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa1ee67128 R14: 00007faa1ee67090 R15: 00007ffd2cd23fc8 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/3941: #0: ffff88814c8f3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x594/0x1a50 drivers/tty/n_tty.c:2158 3 locks held by kworker/1:5/4213: #0: ffff88814c3f5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1 #1: ffffc9000300fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285 #2: ffffffff8d44d548 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x1530 net/ipv6/addrconf.c:4120 3 locks held by kworker/u4:5/4263: 3 locks held by kworker/0:6/4323: #0: ffff88814c3f5138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1 #1: ffffc900032afd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285 #2: ffffffff8d44d548 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x1530 net/ipv6/addrconf.c:4120 3 locks held by kworker/u4:7/5733: #0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1 #1: ffffc900034efd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285 #2: ffffffff8d44d548 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251 2 locks held by syz.8.25/5807: 1 lock held by syz.9.26/5809: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.9.26/5812: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.1.27/5963: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.1.27/5966: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.29/6401: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.29/6402: #0: ffff8880214c4d48 (&q->debugfs_mutex ){+.+.}-{3:3} , at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.30/6404: #0: ffff8880214c4d48 ( &q->debugfs_mutex ){+.+.}-{3:3} , at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.30/6405: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.0.28/6407: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.0.28/6408: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.31/6410: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.31/6411: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.5.32/6423: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.5.32/6424: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.6.33/6486: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3} , at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.6.33/6489: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.8.35/6527: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.8.35/6530: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.7.34/6529: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.7.34/6531: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.9.36/6533: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.9.36/6534: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.1.37/6536: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.1.37/6537: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.38/6552: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.38/6553: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.40/6613: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.40/6615: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.0.39/6614: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3} , at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.0.39/6616: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.41/6633: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.41/6634: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.5.42/6637: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.5.42/6638: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.6.43/6651: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.6.43/6652: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.8.45/6723: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.8.45/6724: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.7.44/6726: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.7.44/6727: #0: ffff8880214c4d48 ( &q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.1.46/6748: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.1.46/6749: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.9.47/6751: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.9.47/6752: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.48/6754: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.48/6755: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 3 locks held by syz-executor/6785: 1 lock held by syz-executor/6793: #0: ffffffff8d44d548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d44d548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695 1 lock held by syz.3.50/6801: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.50/6802: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.0.49/6811: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.0.49/6812: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.51/6848: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.51/6849: #0: ffff8880214c4d48 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0x144/0x5a0 kernel/trace/blktrace.c:735 1 lock held by syz-executor/6851: #0: ffffffff8d44d548 (rtnl_mutex ){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] ){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x79f/0xf10 net/core/rtnetlink.c:5695 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xe1b/0xe60 kernel/hung_task.c:369 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5807 Comm: syz.8.25 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:preempt_latency_start kernel/sched/core.c:5492 [inline] RIP: 0010:preempt_count_add+0xb5/0x190 kernel/sched/core.c:5515 Code: 0b 00 85 c0 74 09 31 db 31 ff e8 c6 c2 0b 00 65 4c 8b 35 1e 17 b0 7e 49 81 c6 e8 14 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 21 f0 6b 00 49 89 1e 5b 41 5e 41 5f c3 89 fb e8 RSP: 0018:ffffc9000339f430 EFLAGS: 00000246 RAX: 1ffff110042c6dc5 RBX: ffffffff81351ed7 RCX: ffffffff962f7f00 RDX: dffffc0000000000 RSI: ffffffff817f6099 RDI: ffffffff81351ed7 RBP: 1ffff92000673ea4 R08: ffffc9000339f5b0 R09: 0000000000000006 R10: dffffc0000000000 R11: fffff52000673ea9 R12: ffffffff817f6099 R13: ffffc9000339f9e0 R14: ffff888021636e28 R15: dffffc0000000000 FS: 00007fe0bba3d6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f396a434000 CR3: 000000017fc72000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x97/0x1cf0 arch/x86/kernel/unwind_orc.c:433 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122 save_stack+0x121/0x230 mm/page_owner.c:119 __reset_page_owner+0x51/0x180 mm/page_owner.c:140 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396 relay_destroy_buf+0x115/0x3b0 kernel/relay.c:204 relay_remove_buf kernel/relay.c:224 [inline] kref_put include/linux/kref.h:65 [inline] relay_close_buf kernel/relay.c:433 [inline] relay_close+0x3a7/0x6d0 kernel/relay.c:769 blk_trace_free+0x3c/0x110 kernel/trace/blktrace.c:315 blk_trace_cleanup kernel/trace/blktrace.c:351 [inline] __blk_trace_remove+0xda/0x170 kernel/trace/blktrace.c:365 blk_trace_ioctl+0x279/0x5a0 kernel/trace/blktrace.c:755 blkdev_common_ioctl+0x1056/0x1ed0 block/ioctl.c:532 blkdev_ioctl+0x28f/0x6f0 block/ioctl.c:598 block_ioctl+0xac/0xf0 block/fops.c:496 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fe0bc3fae79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe0bba3d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe0bc666090 RCX: 00007fe0bc3fae79 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004 RBP: 00007fe0bc48dee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe0bc666128 R14: 00007fe0bc666090 R15: 00007fffd9627218