platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 netlink: 44 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 44 bytes leftover after parsing attributes in process `syz-executor.0'. INFO: task syz-executor.5:4943 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28072 4943 32148 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 __flush_work+0x4bb/0x8b0 kernel/workqueue.c:2926 __cancel_work_timer+0x412/0x590 kernel/workqueue.c:3013 p9_conn_destroy net/9p/trans_fd.c:904 [inline] p9_fd_close+0x305/0x520 net/9p/trans_fd.c:934 p9_client_create+0x901/0x12e0 net/9p/client.c:1084 v9fs_session_init+0x1dd/0x1770 fs/9p/v9fs.c:421 v9fs_mount+0x73/0x910 fs/9p/vfs_super.c:135 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd23cd6d639 Code: Bad RIP value. RSP: 002b:00007fd23b29e168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd23ce8e120 RCX: 00007fd23cd6d639 RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 00007fd23cdc8ae9 R08: 0000000020000180 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 R13: 00007ffff270950f R14: 00007fd23b29e300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:3/160: netlink: 44 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. #0: 00000000442b7f60 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 netlink: 44 bytes leftover after parsing attributes in process `syz-executor.0'. platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 #1: 00000000f0c597cf (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000003d802208 (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. 1 lock held by khungtaskd/1570: #0: 000000009332e93f (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 1 lock held by in:imklog/7805: #0: 000000001d553a48 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 audit: type=1400 audit(1668520889.951:495): apparmor="DENIED" operation="stack" info="label not found" error=-2 profile="unconfined" name=FC1E783E8BC8DC834AC4653EBD7DF8FFE7B63B36DBE40D40BFE216D134D497E29D0AFC66FCFA8A2E93806739BBEB7A3697787A681932F075084B7A5ABD3B4635AAD90404FC8618BE1F4027DE305CD2BF022819A5950DE55BDCC3BC7EB3AA53C01C4652F4DCB5E955417F3B5B1839073A1AB355B1F4EDDDB6931D65D91EE0610A9FAD219B2DE09F8C89E8C2A5545153C07756F83F33D82A51AD1C51A39428E012D1494148B2F2B8DE6D9ACEE39459E064E6436827291C85B4C3BAFE311FD56053027A6C4A34B89CC932DE6E756479A113D5018118487F8D1AC427FC237D52CFC9CC3BF8AF514A7838459CAA7BA53A08CA9E446DD4E5BE5B1D pid=11375 comm="syz-executor.5" 2 locks held by kworker/1:3/30273: #0: 00000000b296d6dd ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000009f51d04a ((work_completion)(&m->wq)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 2 locks held by syz-executor.4/11371: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4681 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 RSP: 0018:ffff8880a1ba7a28 EFLAGS: 00000246 RAX: ffff8880a1b982c0 RBX: dffffc0000000000 RCX: 1ffff11014374f67 RDX: 0000000000000000 RSI: ffffffff816c3aba RDI: ffffffff886fb768 RBP: ffff8880a1ba7b00 R08: 0000000000000000 R09: 000000007fff0000 R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff886fb460 R13: ffffed1014374f62 R14: ffffc90001a93050 R15: 0000000000000061 FS: 00007fa45737c8c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa454197000 CR3: 00000000a180f000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ___bpf_prog_run+0x41a/0x4e80 kernel/bpf/core.c:1389