INFO: task syz.0.17:6602 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:28696 pid:6602 tgid:6600 ppid:6174 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x17fc/0x5660 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x164/0x360 kernel/sched/core.c:7283 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7340 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x6bc/0x14f0 kernel/locking/mutex.c:820 blk_debugfs_lock_nomemsave block/blk.h:758 [inline] blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 sg_ioctl_common drivers/scsi/sg.c:1124 [inline] sg_ioctl+0x45b/0x2200 drivers/scsi/sg.c:1158 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10a/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fdec459cdd9 RSP: 002b:00007fdec53da028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdec4816090 RCX: 00007fdec459cdd9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003 RBP: 00007fdec4632d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdec4816128 R14: 00007fdec4816090 R15: 00007ffc3bf2c758 INFO: task syz.0.17:6602 is blocked on a mutex likely owned by task syz.0.17:6601. task:syz.0.17 state:R running task stack:25672 pid:6601 tgid:6600 ppid:6174 task_flags:0x480040 flags:0x00080003 Call Trace: INFO: task syz.2.19:6605 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:26960 pid:6605 tgid:6604 ppid:6183 task_flags:0x480040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x17fc/0x5660 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x164/0x360 kernel/sched/core.c:7283 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7340 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x6bc/0x14f0 kernel/locking/mutex.c:820 blk_debugfs_lock_nomemsave block/blk.h:758 [inline] blk_debugfs_lock block/blk.h:770 [inline] blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 sg_ioctl_common drivers/scsi/sg.c:1116 [inline] sg_ioctl+0xa93/0x2200 drivers/scsi/sg.c:1158 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10a/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fe65339cdd9 RSP: 002b:00007fe6541ac028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe653615fa0 RCX: 00007fe65339cdd9 RDX: 0000200000000040 RSI: 00000000c0481273 RDI: 0000000000000003 RBP: 00007fe653432d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe653616038 R14: 00007fe653615fa0 R15: 00007ffe80d0bc98 INFO: task syz.2.19:6605 is blocked on a mutex likely owned by task syz.0.17:6601. task:syz.0.17 state:R running task stack:25672 pid:6601 tgid:6600 ppid:6174 task_flags:0x480040 flags:0x00080003 Call Trace: INFO: task syz.2.19:6609 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:28696 pid:6609 tgid:6604 ppid:6183 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x17fc/0x5660 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x164/0x360 kernel/sched/core.c:7283 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7340 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x6bc/0x14f0 kernel/locking/mutex.c:820 blk_debugfs_lock_nomemsave block/blk.h:758 [inline] blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 sg_ioctl_common drivers/scsi/sg.c:1124 [inline] sg_ioctl+0x45b/0x2200 drivers/scsi/sg.c:1158 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10a/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fe65339cdd9 RSP: 002b:00007fe65418b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe653616090 RCX: 00007fe65339cdd9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003 RBP: 00007fe653432d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe653616128 R14: 00007fe653616090 R15: 00007ffe80d0bc98 INFO: task syz.2.19:6609 is blocked on a mutex likely owned by task syz.0.17:6601. task:syz.0.17 state:R running task stack:25672 pid:6601 tgid:6600 ppid:6174 task_flags:0x480040 flags:0x00080003 Call Trace: Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e140b00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e140b00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e140b00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 2 locks held by getty/5283: #0: ffff8880307c20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900032262e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5e6/0x1a40 drivers/tty/n_tty.c:2211 3 locks held by syz.0.17/6601: 1 lock held by syz.0.17/6602: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.2.19/6605: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.2.19/6609: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.5.22/6846: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.5.22/6849: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.6.23/6900: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.6.23/6902: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.9.26/6908: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.9.26/6909: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.8.25/6911: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.8.25/6912: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.7.24/6914: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.7.24/6915: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.4.27/7239: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.4.27/7240: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.1.28/7278: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.1.28/7281: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.3.31/7294: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.3.31/7295: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.0.29/7297: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.0.29/7300: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.2.30/7299: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.2.30/7301: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.5.32/7396: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.5.32/7397: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.6.33/7481: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.6.33/7483: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.7.34/7498: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.7.34/7501: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.8.35/7515: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.8.35/7516: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.9.36/7518: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.9.36/7519: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.4.37/7563: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.4.37/7564: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.1.38/7682: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.1.38/7683: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.3.39/7696: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.3.39/7699: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.0.40/7712: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.0.40/7713: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.2.41/7716: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.2.41/7718: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.5.42/7760: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.5.42/7761: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.6.43/7911: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.6.43/7914: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.7.44/7963: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.7.44/7964: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.9.46/7972: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.9.46/7973: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.8.45/7975: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.8.45/7976: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.4.47/7978: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:770 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x2d5/0x670 kernel/trace/blktrace.c:788 1 lock held by syz.4.47/7979: #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:758 [inline] #0: ffff888026c4ade8 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x20/0x40 kernel/trace/blktrace.c:561 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x2e0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0x1852/0x18b0 kernel/hung_task.c:561 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x510/0xb60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6602 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1106 [inline] RIP: 0010:debug_check_no_obj_freed+0x1d9/0x550 lib/debugobjects.c:1146 Code: 00 00 48 ba 00 00 00 00 00 fc ff df ff c3 48 8b 04 24 48 89 c5 48 85 c0 0f 84 44 03 00 00 49 89 ee 49 c1 ee 03 41 80 3c 16 00 <74> 12 48 89 ef e8 2d 9f 7c fd 48 ba 00 00 00 00 00 fc ff df 48 8b RSP: 0018:ffffc90003a1fb18 EFLAGS: 00000046 RAX: ffff888050bf5d58 RBX: 0000000000000005 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90003a1fa80 RBP: ffff888050bf5d58 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000743f50 R12: ffffc90090399000 R13: ffffc900103e9000 R14: 1ffff1100a17ebab R15: ffff8880593c61e8 FS: 00007fdec53da6c0(0000) GS:ffff888126033000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6f42090ed0 CR3: 0000000072c54000 CR4: 00000000003526f0 Call Trace: remove_vm_area+0x1d3/0x300 mm/vmalloc.c:3330 vunmap+0x51/0xa0 mm/vmalloc.c:3498 relay_destroy_buf+0x6a/0x3a0 kernel/relay.c:197 relay_remove_buf kernel/relay.c:219 [inline] kref_put include/linux/kref.h:65 [inline] relay_close_buf kernel/relay.c:434 [inline] relay_close+0x3c7/0x620 kernel/relay.c:663 blk_trace_free+0x3c/0x110 kernel/trace/blktrace.c:471 blk_trace_cleanup kernel/trace/blktrace.c:539 [inline] __blk_trace_remove+0x22c/0x2c0 kernel/trace/blktrace.c:552 blk_trace_remove+0x28/0x40 kernel/trace/blktrace.c:562 sg_ioctl_common drivers/scsi/sg.c:1124 [inline] sg_ioctl+0x45b/0x2200 drivers/scsi/sg.c:1158 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10a/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fdec459cdd9 Code: Unable to access opcode bytes at 0x7fdec459cdaf. RSP: 002b:00007fdec53da028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdec4816090 RCX: 00007fdec459cdd9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003 RBP: 00007fdec4632d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdec4816128 R14: 00007fdec4816090 R15: 00007ffc3bf2c758