INFO: task syz.4.126:7212 blocked for more than 145 seconds. Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.126 state:D stack:0 pid:7212 tgid:7206 ppid:6421 flags:0x00000001 Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1744/0x27f0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6848 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6905 rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1578 filemap_invalidate_lock include/linux/fs.h:863 [inline] blkdev_fallocate+0x1a8/0x3c8 block/fops.c:813 vfs_fallocate+0x484/0x5c0 fs/open.c:327 madvise_remove mm/madvise.c:1020 [inline] madvise_vma_behavior mm/madvise.c:1255 [inline] madvise_walk_vmas mm/madvise.c:1497 [inline] do_madvise+0x1db8/0x383c mm/madvise.c:1684 __do_sys_madvise mm/madvise.c:1700 [inline] __se_sys_madvise mm/madvise.c:1698 [inline] __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1698 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffff80008fb83160 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 4 locks held by kworker/u8:2/38: 3 locks held by kworker/u8:3/45: #0: ffff0000d16ef948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff800099107c20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by kworker/u8:5/511: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff80009ca97c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by dhcpcd/6087: #0: ffff8000928b5368 (vlan_ioctl_mutex){+.+.}-{4:4}, at: sock_ioctl+0x574/0x838 net/socket.c:1290 #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by getty/6177: #0: ffff0000d247c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b9ee2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 5 locks held by kworker/u8:11/7082: #0: ffff0000c1899948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff8000a28b7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff8000928c3910 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x13c/0xa34 net/core/net_namespace.c:602 #3: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 #4: ffff80008fb886b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #4: ffff80008fb886b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x354/0x674 kernel/rcu/tree_exp.h:976 1 lock held by syz.4.126/7210: 2 locks held by syz.4.126/7211: 1 lock held by syz.4.126/7212: #0: ffff0000c1543750 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:863 [inline] #0: ffff0000c1543750 (mapping.invalidate_lock#2){++++}-{4:4}, at: blkdev_fallocate+0x1a8/0x3c8 block/fops.c:813 1 lock held by syz-executor/7338: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by syz-executor/7396: #0: ffff80008f9a1628 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:157 #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xb30/0x1adc net/core/rtnetlink.c:4011 1 lock held by syz-executor/7405: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xb30/0x1adc net/core/rtnetlink.c:4011 2 locks held by syz-executor/7418: #0: ffff80008f9bea28 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:157 #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xb30/0x1adc net/core/rtnetlink.c:4011 2 locks held by syz-executor/7422: #0: ffff8000918344e0 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:157 #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #1: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xb30/0x1adc net/core/rtnetlink.c:4011 1 lock held by syz-executor/7456: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xb30/0x1adc net/core/rtnetlink.c:4011 1 lock held by syz-executor/7479: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz-executor/7486: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz-executor/7491: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz-executor/7495: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 =============================================