INFO: task syz.2.19:6056 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.19 state:D stack:25248 pid:6056 tgid:6055 ppid:5947 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x14bc/0x5000 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0x165/0x360 kernel/sched/core.c:6960 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017 __mutex_lock_common kernel/locking/mutex.c:692 [inline] __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:776 relay_open+0x3b8/0x920 kernel/relay.c:517 blk_trace_setup_prepare+0x425/0x5a0 kernel/trace/blktrace.c:716 blk_trace_setup+0x244/0x3d0 kernel/trace/blktrace.c:789 blk_trace_ioctl+0x2f9/0x6e0 kernel/trace/blktrace.c:935 blkdev_ioctl+0x4a2/0x710 block/ioctl.c:780 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+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fea2af8f749 RSP: 002b:00007fea2bf0d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fea2b1e5fa0 RCX: 00007fea2af8f749 RDX: 0000200000000240 RSI: 00000000c0481273 RDI: 0000000000000003 RBP: 00007fea2b013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fea2b1e6038 R14: 00007fea2b1e5fa0 R15: 00007ffde1a3bc48 INFO: task syz.4.21:6058 blocked for more than 145 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.21 state:D stack:26184 pid:6058 tgid:6057 ppid:5957 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x14bc/0x5000 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0x165/0x360 kernel/sched/core.c:6960 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017 __mutex_lock_common kernel/locking/mutex.c:692 [inline] __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:776 relay_open+0x3b8/0x920 kernel/relay.c:517 blk_trace_setup_prepare+0x425/0x5a0 kernel/trace/blktrace.c:716 blk_trace_setup+0x244/0x3d0 kernel/trace/blktrace.c:789 blk_trace_ioctl+0x2f9/0x6e0 kernel/trace/blktrace.c:935 blkdev_ioctl+0x4a2/0x710 block/ioctl.c:780 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+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f046d78f749 RSP: 002b:00007f046e673038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f046d9e5fa0 RCX: 00007f046d78f749 RDX: 0000200000000240 RSI: 00000000c0481273 RDI: 0000000000000003 RBP: 00007f046d813f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f046d9e6038 R14: 00007f046d9e5fa0 R15: 00007fffac8419a8 INFO: task syz.3.20:6060 blocked for more than 146 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.20 state:D stack:26776 pid:6060 tgid:6059 ppid:5954 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x14bc/0x5000 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0x165/0x360 kernel/sched/core.c:6960 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017 __mutex_lock_common kernel/locking/mutex.c:692 [inline] __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:776 relay_open+0x3b8/0x920 kernel/relay.c:517 blk_trace_setup_prepare+0x425/0x5a0 kernel/trace/blktrace.c:716 blk_trace_setup+0x244/0x3d0 kernel/trace/blktrace.c:789 blk_trace_ioctl+0x2f9/0x6e0 kernel/trace/blktrace.c:935 blkdev_ioctl+0x4a2/0x710 block/ioctl.c:780 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+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f92ec78f749 RSP: 002b:00007f92ed544038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f92ec9e5fa0 RCX: 00007f92ec78f749 RDX: 0000200000000240 RSI: 00000000c0481273 RDI: 0000000000000003 RBP: 00007f92ec813f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f92ec9e6038 R14: 00007f92ec9e5fa0 R15: 00007fffaeee7358 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8df419e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8df419e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff8df419e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 3 locks held by kworker/u8:7/1150: #0: ffff88814c8c7948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x841/0x15a0 kernel/workqueue.c:3236 #1: ffffc90003ddfb80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x868/0x15a0 kernel/workqueue.c:3237 #2: ffffffff8f310348 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #2: ffffffff8f310348 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x112/0x14b0 net/ipv6/addrconf.c:4194 2 locks held by klogd/5190: 3 locks held by udevd/5201: 2 locks held by dhcpcd/5495: 2 locks held by getty/5585: #0: ffff88814c2ba0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x449/0x1460 drivers/tty/n_tty.c:2211 3 locks held by syz-execprog/5825: #0: ffff88807d8b9bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:410 [inline] ffff88807d8b9bc0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/mmap_lock.c:390 [inline] ffff88807d8b9bc0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x300 mm/mmap_lock.c:450 #1: ffff88807ec85280 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1092 [inline] #1: ffff88807ec85280 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0x8ff/0x1290 mm/filemap.c:3556 #2: ffffffff8e04f820 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4374 [inline] #2: ffffffff8e04f820 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim+0xb8/0x300 mm/page_alloc.c:4399 6 locks held by syz-execprog/5826: 1 lock held by syz-execprog/5827: #0: ffff88807ec85280 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1092 [inline] #0: ffff88807ec85280 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0x8ff/0x1290 mm/filemap.c:3556 2 locks held by syz-executor/5834: 3 locks held by syz.1.18/6054: 2 locks held by syz.2.19/6056: #0: ffff88814173d520 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.4.21/6058: #0: ffff888140b91bf0 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.3.20/6060: #0: ffff888140b908e0 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.6.23/6210: #0: ffff888140b94210 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.5.22/6211: #0: ffff888140b92f00 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.9.26/6214: #0: ffff888140b97b40 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.7.24/6216: #0: ffff888140b95520 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.8.25/6218: #0: ffff888140b96830 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 2 locks held by syz.0.27/6323: #0: ffff88814173af00 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 #1: ffffffff8df98a48 (relay_channels_mutex){+.+.}-{4:4}, at: relay_open+0x3b8/0x920 kernel/relay.c:517 1 lock held by syz.2.29/6335: #0: ffff88814173d520 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 1 lock held by syz.1.28/6340: #0: ffff88814173c210 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 1 lock held by syz.3.30/6342: #0: ffff888140b908e0 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 1 lock held by syz.4.31/6344: #0: ffff888140b91bf0 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 1 lock held by syz.6.32/6466: #0: ffff888140b94210 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 1 lock held by syz.9.34/6490: #0: ffff888140b97b40 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788 1 lock held by syz.5.33/6494: #0: ffff888140b92f00 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0x21c/0x3d0 kernel/trace/blktrace.c:788