INFO: task syz.5.21:6787 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.5.21 state:D stack:29000 pid:6787 tgid:6785 ppid:6759 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5298 [inline] __schedule+0xfee/0x6120 kernel/sched/core.c:6911 __schedule_loop kernel/sched/core.c:6993 [inline] schedule+0xdd/0x390 kernel/sched/core.c:7008 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7065 __mutex_lock_common kernel/locking/mutex.c:692 [inline] __mutex_lock+0xc9a/0x1b90 kernel/locking/mutex.c:776 blk_debugfs_lock_nomemsave block/blk.h:740 [inline] blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 sg_ioctl_common drivers/scsi/sg.c:1124 [inline] sg_ioctl+0x22d/0x2730 drivers/scsi/sg.c:1158 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faa993978f9 RSP: 002b:00007faa9a166028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007faa995c6080 RCX: 00007faa993978f9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000003 RBP: 00007faa994291bc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007faa995c6080 R15: 00007ffc53feee78 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e7e7920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #0: ffffffff8e7e7920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #0: ffffffff8e7e7920 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3d/0x184 kernel/locking/lockdep.c:6775 2 locks held by kswapd0/78: 2 locks held by getty/5563: #0: ffff8880343100a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x419/0x1500 drivers/tty/n_tty.c:2211 2 locks held by syz.5.21/6786: 1 lock held by syz.5.21/6787: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.8.24/6891: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.8.24/6892: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.6.22/6894: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.6.22/6895: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.7.23/6897: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.7.23/6898: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.9.25/6900: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.9.25/6901: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.2.26/7027: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.2.26/7030: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.4.29/7192: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.4.29/7193: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.3.30/7203: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.3.30/7204: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.1.28/7206: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.1.28/7207: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.0.27/7209: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.0.27/7210: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.5.31/7238: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.5.31/7239: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.6.32/7341: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.6.32/7342: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.7.33/7363: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.7.33/7365: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.9.34/7376: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.9.34/7377: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.8.35/7379: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.8.35/7380: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.2.36/7382: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.2.36/7383: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.4.37/7455: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.4.37/7456: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.3.38/7484: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.3.38/7485: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.0.39/7501: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.0.39/7502: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.1.40/7504: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.1.40/7505: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.5.41/7507: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.5.41/7508: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.6.42/7581: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.6.42/7582: #0: ffff88802953b888 (&q->debugfs_mutex ){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] ){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.7.43/7626: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.7.43/7628: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.9.44/7641: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.9.44/7642: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.8.45/7646: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.8.45/7648: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.2.46/7651: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.2.46/7652: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.4.47/7681: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.4.47/7682: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.3.48/7748: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.3.48/7750: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.0.49/7766: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.0.49/7767: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.5.51/7775: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.5.51/7776: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.1.50/7778: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.1.50/7779: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 1 lock held by syz.6.52/7806: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock block/blk.h:752 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x1f2/0x440 kernel/trace/blktrace.c:788 1 lock held by syz.6.52/7807: #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_debugfs_lock_nomemsave block/blk.h:740 [inline] #0: ffff88802953b888 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:561 3 locks held by syz-executor/7809: #0: ffffffff8f984668 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:187 [inline] #0: ffffffff8f984668 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:294 [inline] #0: ffffffff8f984668 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x113/0x2c0 net/core/rtnetlink.c:574 #1: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #1: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #1: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8bb/0x2380 net/core/rtnetlink.c:4093 #2: ffffffff8e7f3478 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x27f/0x3c0 kernel/rcu/tree_exp.h:311 1 lock held by syz-executor/7820: #0: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x30c/0x18b0 net/ipv4/devinet.c:978 1 lock held by syz-executor/7824: #0: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x30c/0x18b0 net/ipv4/devinet.c:978 1 lock held by syz-executor/7825: #0: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff906145e8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x30c/0x18b0 net/ipv4/devinet.c:978 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x12d/0x151 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1d7/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x141/0x190 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline] watchdog+0xd25/0x1050 kernel/hung_task.c:515 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x754/0xd80 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: 78 Comm: kswapd0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:__sanitizer_cov_trace_pc+0x2a/0x70 kernel/kcov.c:235 Code: f3 0f 1e fa 65 8b 05 85 78 05 12 48 8b 34 24 65 48 8b 15 61 78 05 12 a9 00 01 ff 00 74 1b f6 c4 01 74 07 a9 00 00 ff 00 74 05 11 74 8b 09 8b 82 a4 16 00 00 85 c0 74 f1 8b 82 80 16 00 00 83 RSP: 0018:ffffc9000215ed40 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000029 RCX: 00000000000003c0 RDX: ffff88801dbcc980 RSI: ffffffff850009dd RDI: ffff88807392d440 RBP: 0000000000000052 R08: 0000000000000001 R09: 00000000000003a7 R10: 0000000000000000 R11: ffff888073920042 R12: 0000000000000000 R13: ffff88807392d740 R14: dffffc0000000000 R15: ffff888073920000 FS: 0000000000000000(0000) GS:ffff888124439000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd17ebe25e0 CR3: 0000000029bf0000 CR4: 00000000003526f0 Call Trace: INIT_HLIST_NODE include/linux/list.h:948 [inline] hlist_del_init include/linux/list.h:1021 [inline] hash_del include/linux/hashtable.h:107 [inline] update_hashtables lib/842/842_compress.c:434 [inline] sw842_compress+0xfdd/0x4450 lib/842/842_compress.c:552 crypto_scomp_decompress include/crypto/internal/scompress.h:79 [inline] scomp_acomp_comp_decomp+0x732/0xc40 crypto/scompress.c:254 crypto_acomp_compress+0x14c/0x520 crypto/acompress.c:289 zswap_compress mm/zswap.c:885 [inline] zswap_store_page mm/zswap.c:1422 [inline] zswap_store+0xeda/0x29d0 mm/zswap.c:1533 swap_writeout+0x49d/0x12b0 mm/page_io.c:275 writeout mm/vmscan.c:652 [inline] pageout mm/vmscan.c:699 [inline] shrink_folio_list+0x5c4a/0x6000 mm/vmscan.c:1425 evict_folios+0x7fa/0x1e90 mm/vmscan.c:4718 try_to_shrink_lruvec+0x57e/0x990 mm/vmscan.c:4881 shrink_one+0x307/0x7f0 mm/vmscan.c:4926 shrink_many mm/vmscan.c:4989 [inline] lru_gen_shrink_node mm/vmscan.c:5067 [inline] shrink_node+0x26a2/0x3e20 mm/vmscan.c:6047 kswapd_shrink_node mm/vmscan.c:6894 [inline] balance_pgdat+0xbb7/0x1ca0 mm/vmscan.c:7070 kswapd+0x556/0xba0 mm/vmscan.c:7343 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245