INFO: task kworker/0:3:5090 blocked for more than 143 seconds. Not tainted 6.8.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:24016 pid:5090 tgid:5090 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 linkwatch_event+0xe/0x60 net/core/link_watch.c:281 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x915/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2f1/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 INFO: task kworker/0:2:30605 blocked for more than 144 seconds. Not tainted 6.8.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:23376 pid:30605 tgid:30605 ppid:2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x915/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2f1/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 INFO: task syz-executor.0:1040 blocked for more than 144 seconds. Not tainted 6.8.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:20984 pid:1040 tgid:1040 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f7a0367fa9c RSP: 002b:00007fff4a6c1a90 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f7a042d4620 RCX: 00007f7a0367fa9c RDX: 0000000000000028 RSI: 00007f7a042d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff4a6c1ae4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f7a042d4670 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 6 locks held by kworker/u4:2/42: #0: ffff888015ec1d38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888015ec1d38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90000b2fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90000b2fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffff88802f13ab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1769 [inline] #2: ffff88802f13ab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1bd/0x3e0 fs/ext4/inode.c:2767 #3: ffff88802f13c950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x203c/0x22a0 fs/jbd2/transaction.c:463 #4: ffff888056cabe88 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x988/0x1d20 fs/ext4/inode.c:616 #5: ffff8880b943c958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 4 locks held by kworker/u4:5/1086: #0: ffff88802e3b0538 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff88802e3b0538 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90004557d20 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90004557d20 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffff88802f13c950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x203c/0x22a0 fs/jbd2/transaction.c:463 #3: ffff88803cfb7088 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x988/0x1d20 fs/ext4/inode.c:616 2 locks held by getty/4820: #0: ffff888029dfe0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 3 locks held by kworker/0:3/5090: #0: ffff888014c74938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c74938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90004567d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90004567d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281 3 locks held by kworker/0:4/5091: #0: ffff888029187d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888029187d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90004577d20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90004577d20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4686 3 locks held by kworker/0:0/29508: #0: ffff888014c75d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c75d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90016457d20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90016457d20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x91/0xe50 net/wireless/reg.c:2479 4 locks held by kworker/1:0/29692: #0: ffff8880b953c958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #1: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988 #2: ffff8880b9529898 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999 #3: ffffffff946cdc30 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x16d/0x510 lib/debugobjects.c:708 4 locks held by kworker/u4:6/29821: #0: ffff888015ea0938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888015ea0938 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90004bafd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90004bafd20 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f369810 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf5/0xb90 net/core/net_namespace.c:580 #3: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe8/0x9d0 net/core/dev.c:11605 2 locks held by kworker/u4:8/30005: 2 locks held by kworker/0:1/30573: #0: ffff888014c76538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c76538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90014537d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90014537d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 3 locks held by kworker/0:2/30605: #0: ffff888014c74938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c74938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc900151d7d20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc900151d7d20 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 3 locks held by kworker/1:1/31287: #0: ffff888029187d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888029187d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc900034cfd20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc900034cfd20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4686 4 locks held by syz-executor.1/583: 1 lock held by syz-executor.0/1040: #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 2 locks held by syz-executor.3/1132: #0: ffffffff8f369810 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c7/0x7b0 net/core/net_namespace.c:491 #1: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:421 1 lock held by syz-executor.0/1693: #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.3/1763: #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 3 locks held by syz-executor.4/1940: #0: ffff88802f138420 (sb_writers#4){.+.+}-{0:0}, at: do_coredump+0x1b78/0x2b50 fs/coredump.c:763 #1: ffff888038a46800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888038a46800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x97/0x350 fs/ext4/file.c:294 #2: ffff88802f1380e0 (&type->s_umount_key#31){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2717 3 locks held by syz-executor.4/1955: #0: ffff88802f138420 (sb_writers#4){.+.+}-{0:0}, at: do_coredump+0x1b78/0x2b50 fs/coredump.c:763 #1: ffff888081fa2c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888081fa2c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x97/0x350 fs/ext4/file.c:294 #2: ffff88802f1380e0 (&type->s_umount_key#31){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2717 2 locks held by syz-executor.4/1981: #0: ffff88802f138420 (sb_writers#4){.+.+}-{0:0}, at: do_coredump+0x1b78/0x2b50 fs/coredump.c:763 #1: ffff888081f3c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888081f3c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x97/0x350 fs/ext4/file.c:294 3 locks held by syz-executor.4/1998: #0: ffff88802f138420 (sb_writers#4){.+.+}-{0:0}, at: do_coredump+0x1b78/0x2b50 fs/coredump.c:763 #1: ffff888081f3a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888081f3a200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x97/0x350 fs/ext4/file.c:294 #2: ffff88802f1380e0 (&type->s_umount_key#31){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2717 1 lock held by syz-executor.2/2008: #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3506 3 locks held by syz-executor.4/2057: #0: ffff88802f138420 (sb_writers#4){.+.+}-{0:0}, at: do_coredump+0x1b78/0x2b50 fs/coredump.c:763 #1: ffff888056d7d400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888056d7d400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x97/0x350 fs/ext4/file.c:294 #2: ffff88802f1380e0 (&type->s_umount_key#31){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2717 2 locks held by syz-executor.4/2122: 3 locks held by syz-executor.4/2140: #0: ffff88802f138420 (sb_writers#4){.+.+}-{0:0}, at: do_coredump+0x1b78/0x2b50 fs/coredump.c:763 #1: ffff88804ecaac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88804ecaac00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0x97/0x350 fs/ext4/file.c:294 #2: ffff88802f1380e0 (&type->s_umount_key#31){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2717 1 lock held by syz-executor.0/2152: #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.4/2154: 4 locks held by syz-executor.4/2171: 1 lock held by syz-executor.3/2215: #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.2/2280: #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f375d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.1/2287: 1 lock held by syz-executor.4/2293: 2 locks held by syz-executor.1/2319: 2 locks held by syz-executor.1/2341: 2 locks held by syz-executor.4/2354: 2 locks held by syz-executor.5/2358: 2 locks held by syz-executor.1/2367: 4 locks held by syz-executor.4/2365: 2 locks held by syz-executor.5/2372: 2 locks held by syz-executor.4/2375: 2 locks held by syz-executor.1/2381: 1 lock held by syz-executor.5/2390: 4 locks held by syz-executor.4/2391: 2 locks held by syz-executor.1/2394: 2 locks held by syz-executor.5/2402: 2 locks held by syz-executor.4/2405: 2 locks held by syz-executor.1/2406: 2 locks held by syz-executor.5/2413: 2 locks held by syz-executor.4/2418: 2 locks held by syz-executor.1/2419: 2 locks held by syz-executor.5/2432: 2 locks held by syz-executor.4/2433: 2 locks held by syz-executor.1/2434: 2 locks held by syz-executor.1/2448: #0: ffff88802e1e14a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock include/linux/mmap_lock.h:108 [inline] #0: ffff88802e1e14a0 (&mm->mmap_lock){++++}-{3:3}, at: exit_mmap+0x30f/0xd40 mm/mmap.c:3287 #1: ffff88807214fa08 (&anon_vma->rwsem){++++}-{3:3}, at: lock_anon_vma_root mm/rmap.c:251 [inline] #1: ffff88807214fa08 (&anon_vma->rwsem){++++}-{3:3}, at: unlink_anon_vmas+0xd5/0x5f0 mm/rmap.c:409 1 lock held by syz-executor.5/2456: 2 locks held by syz-executor.4/2469: 2 locks held by syz-executor.5/2470: 2 locks held by dhcpcd/2480: #0: ffff888072f26130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff888072f26130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3202 #1: ffffffff8e136578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #1: ffffffff8e136578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995 2 locks held by dhcpcd/2483: #0: ffff88802b78e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff88802b78e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3202 #1: ffffffff8e136578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #1: ffffffff8e136578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995 1 lock held by dhcpcd/2484: #0: ffff88802bfa4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff88802bfa4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3202 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2f1/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 610 Comm: syz-executor.4 Not tainted 6.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:rb_link_node include/linux/rbtree.h:65 [inline] RIP: 0010:rb_add_cached include/linux/rbtree.h:182 [inline] RIP: 0010:timerqueue_add+0x1b5/0x290 lib/timerqueue.c:40 Code: 8b 4c 24 18 80 3c 01 00 48 8b 5c 24 10 74 08 48 89 df e8 1e 57 95 f6 48 89 2b 48 8d 7b 08 ba 10 00 00 00 31 f6 e8 eb 58 95 f6 <48> b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 74 08 4c 89 ff e8 RSP: 0018:ffffc90004bffaf0 EFLAGS: 00000046 RAX: ffffc90004bffd68 RBX: ffffc90004bffd60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90004bffd78 RBP: ffff8880b952c310 R08: ffffc90004bffd77 R09: 0000000000000000 R10: ffffc90004bffd68 R11: fffff5200097ffaf R12: 0000000000000001 R13: 1ffff110172a5864 R14: 0000000000000010 R15: ffff8880b952c320 FS: 0000555555a38480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30229000 CR3: 000000002f310000 CR4: 0000000000350ef0 Call Trace: enqueue_hrtimer+0x1a2/0x3a0 kernel/time/hrtimer.c:1095 __hrtimer_start_range_ns kernel/time/hrtimer.c:1262 [inline] hrtimer_start_range_ns+0xaa0/0xc60 kernel/time/hrtimer.c:1302 hrtimer_start_expires include/linux/hrtimer.h:394 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1969 [inline] do_nanosleep+0x157/0x600 kernel/time/hrtimer.c:2045 hrtimer_nanosleep+0x226/0x470 kernel/time/hrtimer.c:2101 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline] __se_sys_clock_nanosleep+0x32c/0x3c0 kernel/time/posix-timers.c:1373 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fc96a0a91b5 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8 RSP: 002b:00007ffcfdbfd920 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 0000000000000148 RCX: 00007fc96a0a91b5 RDX: 00007ffcfdbfd960 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffcfdbfd9ec R08: 0000000000000000 R09: 00007ffcfdc120b0 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 000000000011e39e R14: 000000000011e39e R15: 0000000000000000