INFO: task syz-executor.4:10280 blocked for more than 143 seconds. Not tainted 6.10.0-rc2-syzkaller-00097-g2df0193e62cf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28032 pid:10280 tgid:10254 ppid:6732 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wext_ioctl_dispatch net/wireless/wext-core.c:1015 [inline] wext_ioctl_dispatch net/wireless/wext-core.c:1004 [inline] wext_handle_ioctl+0x21b/0x2c0 net/wireless/wext-core.c:1077 sock_ioctl+0x3ac/0x6c0 net/socket.c:1275 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f772a27cf69 RSP: 002b:00007f772b01f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f772a3b4120 RCX: 00007f772a27cf69 RDX: 0000000020000000 RSI: 0000000000008b18 RDI: 0000000000000007 RBP: 00007f772a2da6fe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f772a3b4120 R15: 00007ffc6f68f668 Showing all locks held in the system: 3 locks held by kworker/0:1/9: #0: ffff888015481948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc900000e7d80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7d/0x10e0 net/wireless/reg.c:2478 1 lock held by khungtaskd/30: #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8dbb1920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 2 locks held by getty/4843: #0: ffff88802b9950a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 2 locks held by syz-fuzzer/5079: 3 locks held by kworker/1:6/5238: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc9000338fd80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 4 locks held by kworker/u8:10/5809: #0: ffff8880162d3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc9000378fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f736350 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594 #3: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1b/0x230 drivers/net/wireguard/device.c:414 1 lock held by syz-executor.1/9799: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x250 drivers/net/tun.c:3500 3 locks held by kworker/u8:13/10019: #0: ffff88802af01148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc9000329fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733 1 lock held by syz-executor.4/10280: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: wext_ioctl_dispatch net/wireless/wext-core.c:1015 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: wext_ioctl_dispatch net/wireless/wext-core.c:1004 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: wext_handle_ioctl+0x21b/0x2c0 net/wireless/wext-core.c:1077 2 locks held by syz-executor.1/10259: 1 lock held by syz-executor.0/10310: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x4fc/0x4770 drivers/net/tun.c:3110 2 locks held by syz-executor.0/10311: #0: ffffffff8f721de8 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x4a8/0x6c0 net/socket.c:1303 #1: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0xcf/0xa80 net/8021q/vlan.c:553 1 lock held by syz-executor.2/10316: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.4/10379: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.1/10385: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.2/10410: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/10412: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 3 locks held by syz-executor.3/10429: #0: ffffffff8f7e9790 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f7e9848 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f7e9848 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f7e9848 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:57 [inline] #1: ffffffff8f7e9848 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 #2: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: team_nl_options_set_doit+0xa1/0xe20 drivers/net/team/team_core.c:2529 1 lock held by syz-executor.3/10436: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.4/10441: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.1/10443: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.2/10447: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/10449: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.3/10452: #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f74b5e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc2-syzkaller-00097-g2df0193e62cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf86/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5079 Comm: syz-fuzzer Not tainted 6.10.0-rc2-syzkaller-00097-g2df0193e62cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x20 kernel/kcov.c:304 Code: bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 2a fe ff ff 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc9000305f1e0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc9000305f2b0 RCX: ffffffff813cd4b6 RDX: 1ffff9200060be56 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc9000305fe00 R08: 0000000000000001 R09: 0000000000000004 R10: 0000000000000002 R11: 0000000000000001 R12: ffffc9000305f2b8 R13: ffffc9000305f2c0 R14: ffffc90003058000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f04baee5000 CR3: 000000004919c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_stack arch/x86/include/asm/stacktrace.h:60 [inline] stack_access_ok+0x96/0x270 arch/x86/kernel/unwind_orc.c:393 deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline] unwind_next_frame+0xd9b/0x23a0 arch/x86/kernel/unwind_orc.c:585 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 save_stack+0x162/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x8d/0x400 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0x991/0x1310 mm/page_alloc.c:2614 folios_put_refs+0x487/0x6d0 mm/swap.c:1024 free_pages_and_swap_cache+0x36d/0x510 mm/swap_state.c:329 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu mm/mmu_gather.c:373 [inline] tlb_finish_mmu+0x168/0x7b0 mm/mmu_gather.c:465 exit_mmap+0x3d1/0xb20 mm/mmap.c:3354 __mmput+0x12a/0x4d0 kernel/fork.c:1346 mmput+0x62/0x70 kernel/fork.c:1368 exit_mm kernel/exit.c:565 [inline] do_exit+0x9b7/0x2ba0 kernel/exit.c:861 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023 get_signal+0x2616/0x2710 kernel/signal.c:2909 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x473523 Code: Unable to access opcode bytes at 0x4734f9. RSP: 002b:000000c00008fe58 EFLAGS: 00000286 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000473523 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000c00005a948 RBP: 000000c00008fea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000444fa0 R13: 000000c000f927a4 R14: 000000c000007040 R15: 0000000000000037