INFO: task syz-executor.1:27370 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27120 27370 7147 0x80004006 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 ip_set_net_exit+0x194/0x5b0 net/netfilter/ipset/ip_set_core.c:2402 ops_exit_list.isra.0+0xa8/0x150 net/core/net_namespace.c:186 setup_net+0x50c/0x860 net/core/net_namespace.c:364 copy_net_ns+0x293/0x590 net/core/net_namespace.c:482 create_new_namespaces+0x3fb/0xb30 kernel/nsproxy.c:108 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:229 ksys_unshare+0x43d/0x8e0 kernel/fork.c:2960 __do_sys_unshare kernel/fork.c:3028 [inline] __se_sys_unshare kernel/fork.c:3026 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3026 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c889 Code: Bad RIP value. RSP: 002b:00007fb415a42c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fb415a436d4 RCX: 000000000045c889 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000c42 R14: 00000000004ce6b8 R15: 000000000076bf0c INFO: task syz-executor.1:27371 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27584 27371 7147 0x80004006 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4163 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4222 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x7ab/0x13c0 kernel/locking/mutex.c:1103 ip_set_net_exit+0x194/0x5b0 net/netfilter/ipset/ip_set_core.c:2402 ops_exit_list.isra.0+0xa8/0x150 net/core/net_namespace.c:186 setup_net+0x50c/0x860 net/core/net_namespace.c:364 copy_net_ns+0x293/0x590 net/core/net_namespace.c:482 create_new_namespaces+0x3fb/0xb30 kernel/nsproxy.c:108 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:229 ksys_unshare+0x43d/0x8e0 kernel/fork.c:2960 __do_sys_unshare kernel/fork.c:3028 [inline] __se_sys_unshare kernel/fork.c:3026 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3026 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c889 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb415a21c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fb415a226d4 RCX: 000000000045c889 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000c42 R14: 00000000004ce6b8 R15: 000000000076bfac Showing all locks held in the system: 1 lock held by khungtaskd/1138: #0: ffffffff899bed00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 1 lock held by in:imklog/6709: #0: ffff88809d86be30 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 6 locks held by kworker/u4:8/14255: 2 locks held by syz-executor.1/27370: #0: ffffffff8a5764b0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x270/0x590 net/core/net_namespace.c:478 #1: ffffffff8d200298 (&table[i].mutex){+.+.}-{3:3}, at: ip_set_net_exit+0x194/0x5b0 net/netfilter/ipset/ip_set_core.c:2402 2 locks held by syz-executor.1/27371: #0: ffffffff8a5764b0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x270/0x590 net/core/net_namespace.c:478 #1: ffffffff8d200298 (&table[i].mutex){+.+.}-{3:3}, at: ip_set_net_exit+0x194/0x5b0 net/netfilter/ipset/ip_set_core.c:2402 1 lock held by syz-executor.0/27399: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1138 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 59 Comm: kworker/u4:2 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_tt_purge RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:lock_acquire+0x1b3/0x8f0 kernel/locking/lockdep.c:4933 Code: 08 00 00 00 48 89 d0 48 89 54 24 10 48 c1 f8 06 48 8d 3c c5 c0 45 89 8a e8 5a 49 57 00 48 8b 54 24 10 48 0f a3 15 7d bf 2f 09 <0f> 82 01 02 00 00 4c 8b 0c 24 41 89 d8 6a 00 44 89 f2 6a 00 4c 89 RSP: 0018:ffffc90000e57b18 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81598636 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8a8945c0 RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff15128b9 R10: ffffffff8a8945c7 R11: fffffbfff15128b8 R12: 0000000000000000 R13: ffff888063dc2458 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ba2c7b000 CR3: 00000000a6acf000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:358 [inline] batadv_tt_local_purge+0x104/0x360 net/batman-adv/translation-table.c:1444 batadv_tt_purge+0x2b/0xa30 net/batman-adv/translation-table.c:3801 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352