Hello, syzbot found the following issue on: HEAD commit: b1bc554e009e Merge tag 'media/v6.11-1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14478ba5980000 kernel config: https://syzkaller.appspot.com/x/.config?x=2899dbd4b1c2b65c dashboard link: https://syzkaller.appspot.com/bug?extid=50499e163bfa302dfe7b compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c44f53981874/disk-b1bc554e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/04c685d98327/vmlinux-b1bc554e.xz kernel image: https://storage.googleapis.com/syzbot-assets/3627aa754881/bzImage-b1bc554e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+50499e163bfa302dfe7b@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task kworker/0:7:5185 blocked for more than 143 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:7 state:D stack:24512 pid:5185 tgid:5185 ppid:2 flags:0x00004000 Workqueue: events rfkill_global_led_trigger_worker Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 rfkill_global_led_trigger_worker+0x1b/0x160 net/rfkill/core.c:182 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 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 </TASK> INFO: task syz.0.1037:9686 blocked for more than 143 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.1037 state:D stack:29056 pid:9686 tgid:9664 ppid:8495 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 rfkill_unregister+0xde/0x2c0 net/rfkill/core.c:1149 nfc_unregister_device+0x94/0x330 net/nfc/core.c:1167 virtual_ncidev_close+0x51/0xb0 drivers/nfc/virtual_ncidev.c:172 __fput+0x408/0xbb0 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:222 get_signal+0x1ca/0x2770 kernel/signal.c:2689 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+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe7da775b59 RSP: 002b:00007fe7db4aa048 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffff2 RBX: 00007fe7da904398 RCX: 00007fe7da775b59 RDX: 0000000000000064 RSI: 0000000020000680 RDI: 0000000000000003 RBP: 00007fe7da7e4e5d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fe7da904398 R15: 00007ffc498102f8 </TASK> INFO: task syz.0.1037:9688 blocked for more than 143 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.1037 state:D stack:27760 pid:9688 tgid:9664 ppid:8495 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 device_lock include/linux/device.h:1009 [inline] nfc_deactivate_target+0x3c/0x350 net/nfc/core.c:449 nfc_genl_activate_target+0x1e4/0x290 net/nfc/netlink.c:899 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x544/0x830 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0xab5/0xc90 net/socket.c:2597 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2651 __sys_sendmsg+0x117/0x1f0 net/socket.c:2680 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: 0033:0x7fe7da775b59 RSP: 002b:00007fe7db489048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe7da904470 RCX: 00007fe7da775b59 RDX: 0000000000000000 RSI: 0000000020000780 RDI: 0000000000000005 RBP: 00007fe7da7e4e5d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fe7da904470 R15: 00007ffc498102f8 </TASK> INFO: task syz.1.1041:9685 blocked for more than 144 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.1041 state:D stack:28160 pid:9685 tgid:9681 ppid:9019 flags:0x00000004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:35 [inline] genl_op_lock net/netlink/genetlink.c:60 [inline] genl_op_lock net/netlink/genetlink.c:57 [inline] genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x544/0x830 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2212 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: 0033:0x7f3c051778ec RSP: 002b:00007f3c05f1eea0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f3c05f1efb0 RCX: 00007f3c051778ec RDX: 0000000000000028 RSI: 00007f3c05f1f000 RDI: 000000000000000a RBP: 0000000000000000 R08: 00007f3c05f1eef4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000a R13: 00007f3c05f1ef48 R14: 00007f3c05f1f000 R15: 0000000000000000 </TASK> INFO: task syz.4.1047:9706 blocked for more than 144 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.1047 state:D stack:28672 pid:9706 tgid:9705 ppid:8498 flags:0x00000004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:35 [inline] genl_op_lock net/netlink/genetlink.c:60 [inline] genl_op_lock net/netlink/genetlink.c:57 [inline] genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x544/0x830 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2212 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: 0033:0x7f4722d778ec RSP: 002b:00007f4723bd6ed0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4723bd6fd0 RCX: 00007f4722d778ec RDX: 000000000000001c RSI: 00007f4723bd7020 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00007f4723bd6f24 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000004 R13: 00007f4723bd6f78 R14: 00007f4723bd7020 R15: 0000000000000000 </TASK> INFO: task syz.3.1051:9717 blocked for more than 144 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.1051 state:D stack:27296 pid:9717 tgid:9716 ppid:8081 flags:0x00004004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 nfc_register_device+0x11f/0x3c0 net/nfc/core.c:1132 nci_register_device+0x7f4/0xb80 net/nfc/nci/core.c:1266 virtual_ncidev_open+0x147/0x220 drivers/nfc/virtual_ncidev.c:157 misc_open+0x3da/0x4c0 drivers/char/misc.c:165 chrdev_open+0x26d/0x6f0 fs/char_dev.c:414 do_dentry_open+0x91f/0x15f0 fs/open.c:959 vfs_open+0x82/0x3f0 fs/open.c:1089 do_open fs/namei.c:3727 [inline] path_openat+0x2141/0x2d20 fs/namei.c:3886 do_filp_open+0x1dc/0x430 fs/namei.c:3913 do_sys_openat2+0x17a/0x1e0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1442 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: 0033:0x7f97a3975b59 RSP: 002b:00007f97a4836048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f97a3b03f60 RCX: 00007f97a3975b59 RDX: 0000000000000002 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f97a39e4e5d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f97a3b03f60 R15: 00007fffba983848 </TASK> INFO: task syz.3.1051:9721 blocked for more than 145 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.1051 state:D stack:28672 pid:9721 tgid:9716 ppid:8081 flags:0x00000004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:35 [inline] genl_op_lock net/netlink/genetlink.c:60 [inline] genl_op_lock net/netlink/genetlink.c:57 [inline] genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x544/0x830 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2212 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: 0033:0x7f97a39778ec RSP: 002b:00007f97a4813ed0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f97a4813fd0 RCX: 00007f97a39778ec RDX: 000000000000001c RSI: 00007f97a4814020 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007f97a4813f24 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005 R13: 00007f97a4813f78 R14: 00007f97a4814020 R15: 0000000000000000 </TASK> INFO: task syz.2.1052:9726 blocked for more than 145 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.1052 state:D stack:28784 pid:9726 tgid:9725 ppid:8496 flags:0x00000004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 misc_open+0x59/0x4c0 drivers/char/misc.c:129 chrdev_open+0x26d/0x6f0 fs/char_dev.c:414 do_dentry_open+0x91f/0x15f0 fs/open.c:959 vfs_open+0x82/0x3f0 fs/open.c:1089 do_open fs/namei.c:3727 [inline] path_openat+0x2141/0x2d20 fs/namei.c:3886 do_filp_open+0x1dc/0x430 fs/namei.c:3913 do_sys_openat2+0x17a/0x1e0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1442 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: 0033:0x7fc716b75b59 RSP: 002b:00007fc71795c048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fc716d03f60 RCX: 00007fc716b75b59 RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007fc716be4e5d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fc716d03f60 R15: 00007fffbe046538 </TASK> INFO: task syz.2.1052:9727 blocked for more than 145 seconds. Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.1052 state:D stack:28784 pid:9727 tgid:9725 ppid:8496 flags:0x00000004 Call Trace: <TASK> context_switch kernel/sched/core.c:5188 [inline] __schedule+0xe37/0x5490 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 misc_open+0x59/0x4c0 drivers/char/misc.c:129 chrdev_open+0x26d/0x6f0 fs/char_dev.c:414 do_dentry_open+0x91f/0x15f0 fs/open.c:959 vfs_open+0x82/0x3f0 fs/open.c:1089 do_open fs/namei.c:3727 [inline] path_openat+0x2141/0x2d20 fs/namei.c:3886 do_filp_open+0x1dc/0x430 fs/namei.c:3913 do_sys_openat2+0x17a/0x1e0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1442 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: 0033:0x7fc716b75b59 RSP: 002b:00007fc71793b048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fc716d04038 RCX: 00007fc716b75b59 RDX: 0000000000000002 RSI: 0000000020000300 RDI: ffffffffffffff9c RBP: 00007fc716be4e5d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fc716d04038 R15: 00007fffbe046538 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8dbb15e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:327 [inline] #0: ffffffff8dbb15e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:839 [inline] #0: ffffffff8dbb15e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613 2 locks held by getty/4844: #0: ffff88802ea020a0 (&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:2211 4 locks held by kworker/0:4/5141: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc900034cfd80 ((rfkill_op_work).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffffffff8fbe2aa8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_epo+0x55/0x1d0 net/rfkill/core.c:462 #3: ffff888022cb7100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #3: ffff888022cb7100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down+0x2d/0x2e0 net/nfc/core.c:143 3 locks held by kworker/0:7/5185: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90003c5fd80 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffffffff8fbe2aa8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x1b/0x160 net/rfkill/core.c:182 2 locks held by syz.0.1037/9686: #0: ffff888022cb7100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #0: ffff888022cb7100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x60/0x330 net/nfc/core.c:1165 #1: ffffffff8fbe2aa8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xde/0x2c0 net/rfkill/core.c:1149 3 locks held by syz.0.1037/9688: #0: ffffffff8f7f6ab0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:57 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 #2: ffff888022cb7100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #2: ffff888022cb7100 (&dev->mutex){....}-{3:3}, at: nfc_deactivate_target+0x3c/0x350 net/nfc/core.c:449 2 locks held by syz.1.1041/9685: #0: ffffffff8f7f6ab0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:57 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 2 locks held by syz.4.1047/9706: #0: ffffffff8f7f6ab0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:57 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 3 locks held by syz.3.1051/9717: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 #1: ffff8880620e9100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #1: ffff8880620e9100 (&dev->mutex){....}-{3:3}, at: nfc_register_device+0x9a/0x3c0 net/nfc/core.c:1128 #2: ffffffff8fbe2aa8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x3a/0xb40 net/rfkill/core.c:1075 2 locks held by syz.3.1051/9721: #0: ffffffff8f7f6ab0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:57 [inline] #1: ffffffff8f7f6b68 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x580/0x800 net/netlink/genetlink.c:1209 1 lock held by syz.2.1052/9726: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz.2.1052/9727: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9732: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9734: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9737: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9738: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9740: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9743: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9745: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9748: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9749: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9751: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9753: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9755: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9758: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9759: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 1 lock held by syz-executor/9761: #0: ffffffff8e7dcfa8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x59/0x4c0 drivers/char/misc.c:129 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 31 Comm: khungtaskd Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: <TASK> __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 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5177 Comm: kworker/0:6 Not tainted 6.10.0-syzkaller-05505-gb1bc554e009e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: events nsim_dev_trap_report_work RIP: 0010:__lock_acquire+0x2b0/0x3b30 kernel/locking/lockdep.c:5071 Code: 00 e0 44 09 f8 66 41 89 46 20 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 fd 2a 00 00 48 8b 84 24 30 01 00 00 49 89 46 08 <49> 8d 46 10 48 89 c2 48 89 44 24 58 48 b8 00 00 00 00 00 fc ff df RSP: 0018:ffffc900035af2f0 EFLAGS: 00000046 RAX: ffffffff81de7ed3 RBX: 0000000000000001 RCX: 0000000000000002 RDX: 1ffff11005304171 RSI: 0000000000000027 RDI: ffff888029820b88 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000014 R11: dffffc0000000000 R12: ffff88813fffa810 R13: 0000000000000000 R14: ffff888029820b80 R15: 0000000000000027 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c79a0986f8 CR3: 000000000d97a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <TASK> lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5718 seqcount_lockdep_reader_access include/linux/seqlock.h:72 [inline] read_seqbegin include/linux/seqlock.h:772 [inline] zone_span_seqbegin include/linux/memory_hotplug.h:151 [inline] page_outside_zone_boundaries mm/page_alloc.c:434 [inline] bad_range+0x252/0x440 mm/page_alloc.c:453 rmqueue mm/page_alloc.c:3030 [inline] get_page_from_freelist+0x1333/0x2e50 mm/page_alloc.c:3422 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4683 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2265 allocate_slab mm/slub.c:2428 [inline] new_slab+0x84/0x260 mm/slub.c:2481 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3990 [inline] __do_kmalloc_node mm/slub.c:4122 [inline] kmalloc_node_track_caller_noprof+0x355/0x430 mm/slub.c:4143 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:605 __alloc_skb+0x164/0x380 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x2a4/0xc80 drivers/net/netdevsim/dev.c:850 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf20 kernel/workqueue.c:3390 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 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
