INFO: task syz.0.65:6839 blocked for more than 143 seconds. Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.65 state:D stack:0 pid:6839 tgid:6818 ppid:6417 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_nested+0xc0/0xcc kernel/locking/rwsem.c:1694 inode_lock_nested include/linux/fs.h:853 [inline] lock_rename fs/namei.c:3215 [inline] do_renameat2+0x4ec/0xe40 fs/namei.c:5159 __do_sys_renameat2 fs/namei.c:5258 [inline] __se_sys_renameat2 fs/namei.c:5255 [inline] __arm64_sys_renameat2+0xd8/0xf4 fs/namei.c:5255 __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: 4 locks held by kworker/u8:0/11: #0: ffff0000c1899948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff800097a77c20 (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 locks held by kworker/u8:1/13: #0: ffff0000c20f6948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff800097a97c20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6a4/0x15cc kernel/workqueue.c:3210 #2: ffff0000f890c0e0 (&type->s_umount_key#96){++++}-{4:4}, at: super_trylock_shared+0x28/0xe4 fs/super.c:562 #3: ffff0000f1490b00 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1d4/0x4f8 fs/jfs/inode.c:102 1 lock held by khungtaskd/31: #0: ffff80008fb83160 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 3 locks held by kworker/u8:6/1547: #0: ffff0000d2b91948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff80009f627c20 ((work_completion)(&(&ifa->dad_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 1 lock held by dhcpcd/6085: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by getty/6179: #0: ffff0000cb8fd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009ba1b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:8/6627: 4 locks held by syz.0.65/6819: 2 locks held by syz.0.65/6839: #0: ffff0000f890c420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:516 #1: ffff0000f1490eb0 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:853 [inline] #1: ffff0000f1490eb0 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3215 [inline] #1: ffff0000f1490eb0 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: do_renameat2+0x4ec/0xe40 fs/namei.c:5159 2 locks held by syz.4.80/6895: #0: ffff0000f890c0e0 (&type->s_umount_key#96){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff0000f890c0e0 (&type->s_umount_key#96){++++}-{4:4}, at: super_lock+0x244/0x33c fs/super.c:120 #1: ffff0000c9f1e7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:387 [inline] #1: ffff0000c9f1e7d0 (&bdi->wb_switch_rwsem){+.+.}-{4:4}, at: sync_inodes_sb+0x208/0x9ac fs/fs-writeback.c:2819 3 locks held by kworker/u8:9/6996: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x60c/0x15cc kernel/workqueue.c:3210 #1: ffff80009e667c20 ((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 3 locks held by syz-executor/7895: #0: ffff800092931a90 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1218 #1: ffff800092931948 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800092931948 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800092931948 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0x10c/0xbb0 net/netlink/genetlink.c:1209 #2: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by syz.1.227/8306: #0: ffff800092931a90 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1218 #1: ffff0000ffafa6c8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0xf8/0x720 net/netlink/af_netlink.c:2396 #2: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz.2.229/8332: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz.3.225/8349: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6928 1 lock held by syz.6.231/8357: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6928 1 lock held by syz-executor/8370: #0: ffff8000928cfca8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 =============================================