INFO: task syz.3.260:8075 blocked for more than 143 seconds. Not tainted 6.12.0-rc1-syzkaller-g3eddb108abe3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.260 state:D stack:0 pid:8075 tgid:8073 ppid:7119 flags:0x00000001 Call trace: __switch_to+0x420/0x6dc arch/arm64/kernel/process.c:603 context_switch kernel/sched/core.c:5315 [inline] __schedule+0x14bc/0x2718 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6767 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6824 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 genl_lock net/netlink/genetlink.c:35 [inline] genl_op_lock net/netlink/genetlink.c:60 [inline] genl_rcv_msg+0x10c/0xbb0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2550 genl_rcv+0x38/0x50 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x7a4/0xa8c net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] __sys_sendto+0x374/0x4f4 net/socket.c:2209 __do_sys_sendto net/socket.c:2221 [inline] __se_sys_sendto net/socket.c:2217 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2217 __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:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz.3.260:8076 blocked for more than 143 seconds. Not tainted 6.12.0-rc1-syzkaller-g3eddb108abe3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.260 state:D stack:0 pid:8076 tgid:8073 ppid:7119 flags:0x00000001 Call trace: __switch_to+0x420/0x6dc arch/arm64/kernel/process.c:603 context_switch kernel/sched/core.c:5315 [inline] __schedule+0x14bc/0x2718 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6767 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6824 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684 __mutex_lock kernel/locking/mutex.c:752 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804 genl_lock net/netlink/genetlink.c:35 [inline] genl_op_lock net/netlink/genetlink.c:60 [inline] genl_rcv_msg+0x10c/0xbb0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2550 genl_rcv+0x38/0x50 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x7a4/0xa8c net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg net/socket.c:744 [inline] __sys_sendto+0x374/0x4f4 net/socket.c:2209 __do_sys_sendto net/socket.c:2221 [inline] __se_sys_sendto net/socket.c:2217 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2217 __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:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by init/1: 6 locks held by kworker/u8:0/11: #0: ffff0000c1891948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff800097897c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 #2: ffff8000926e36d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0x9b4 net/core/net_namespace.c:580 #3: ffff0000eb8ca0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] #3: ffff0000eb8ca0e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline] #3: ffff0000eb8ca0e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x114/0x418 net/devlink/core.c:506 #4: ffff0000eb8c9250 (&devlink->lock_key#6){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline] #4: ffff0000eb8c9250 (&devlink->lock_key#6){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline] #4: ffff0000eb8c9250 (&devlink->lock_key#6){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x124/0x418 net/devlink/core.c:506 #5: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by kworker/u8:1/13: #0: ffff0000d15b4148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff8000978b7c20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 #2: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 7 locks held by kworker/1:1/27: 1 lock held by khungtaskd/31: #0: ffff80008f9bf5e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 3 locks held by kworker/u8:7/2083: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff8000a0b87c20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 #2: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by kworker/u8:8/2141: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203 #1: ffff8000a0d27c20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203 #2: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by klogd/6025: 2 locks held by getty/6178: #0: ffff0000d7c420a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b7eb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 2 locks held by kworker/1:3/6421: 1 lock held by syz.2.254/8020: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz.1.257/8038: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz.0.258/8049: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 3 locks held by syz.3.260/8074: #0: ffff800092750f90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1218 #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x10c/0xbb0 net/netlink/genetlink.c:1209 #2: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by syz.3.260/8075: #0: ffff800092750f90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1218 #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x10c/0xbb0 net/netlink/genetlink.c:1209 2 locks held by syz.3.260/8076: #0: ffff800092750f90 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1218 #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffff800092750e48 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x10c/0xbb0 net/netlink/genetlink.c:1209 1 lock held by syz-executor/8082: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8085: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 2 locks held by syz-executor/8090: #0: ffff8000926e36d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x290/0x4ac net/core/net_namespace.c:490 #1: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 2 locks held by syz-executor/8093: #0: ffff8000926e36d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x290/0x4ac net/core/net_namespace.c:490 #1: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79 1 lock held by syz-executor/8096: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8112: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8113: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8123: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8126: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8129: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8133: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8136: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8141: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8146: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 1 lock held by syz-executor/8148: #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffff8000926efbe8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6643 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