audit: type=1400 audit(1566384397.722:1055): avc: denied { read } for pid=977 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1566384397.972:1056): avc: denied { read } for pid=986 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1566384398.272:1057): avc: denied { create } for pid=1007 comm="syz-executor.0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 INFO: task init:29225 blocked for more than 140 seconds. Not tainted 4.9.189+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29136 29225 1 0x00000000 0000000000000087 ffff8801a3bb4740 ffff8801d1794780 ffff8801db621000 ffff8801d141df00 ffff8801db621018 ffff8801c552f758 ffffffff82818d1e ffff88010000000d 1ffff10038aa5ed4 00ffe8ffffc149f0 ffff8801db6218f0 Call Trace: [<00000000fa4f7a24>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<00000000f03fa2df>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<000000005ee413c4>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<000000005ee413c4>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<00000000067d7210>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] [<00000000067d7210>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 [<00000000f5d3d49d>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<00000000a28df522>] do_dentry_open+0x422/0xd20 fs/open.c:791 [<0000000045543c79>] vfs_open+0x105/0x230 fs/open.c:904 [<00000000436185c9>] do_last fs/namei.c:3457 [inline] [<00000000436185c9>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<000000002b02759a>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<0000000000b1e38e>] do_sys_open+0x2f0/0x610 fs/open.c:1097 [<000000003d3f6877>] SYSC_open fs/open.c:1115 [inline] [<000000003d3f6877>] SyS_open+0x2d/0x40 fs/open.c:1110 [<0000000020f41cfb>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000cb88d896>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<00000000eb93aba0>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<00000000eb93aba0>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000017c6403>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1899: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000bf8564cf>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2026: #0: (&tty->ldisc_sem){++++++}, at: [<0000000058550757>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000adb2678a>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 2 locks held by kworker/u4:5/2142: #0: ("events_unbound"){.+.+.+}, at: [<000000006295693d>] process_one_work+0x790/0x1600 kernel/workqueue.c:2107 #1: ((&sub_info->work)){+.+.+.}, at: [<000000003685f94a>] process_one_work+0x7ce/0x1600 kernel/workqueue.c:2111 1 lock held by init/29225: #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/29241: #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/29243: #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/29249: #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<00000000067d7210>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.189+ #3 ffff8801d98d7cc8 ffffffff81b65c01 0000000000000001 0000000000000000 0000000000000001 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b70e9c 0000000000000001 0000000000000000 0000000000000001 Call Trace: [<000000000c4ae50e>] __dump_stack lib/dump_stack.c:15 [inline] [<000000000c4ae50e>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000007adde1fa>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000800eaae3>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000dc1b8f20>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<000000002e769879>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<000000002e769879>] check_hung_task kernel/hung_task.c:126 [inline] [<000000002e769879>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<000000002e769879>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<00000000f0160c64>] kthread+0x278/0x310 kernel/kthread.c:211 [<000000001573be82>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 25258 Comm: syz-executor.3 Not tainted 4.9.189+ #3 task: 00000000724fe70f task.stack: 000000008f89d9b8 RIP: 0010:[] c [<000000001209cdc7>] perf_trace_lock_acquire+0x9d/0x530 include/trace/events/lock.h:12 RSP: 0018:ffff8801a1dff658 EFLAGS: 00000046 RAX: 1ffffffff061864c RBX: ffff8801d1459448 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff830d5a20 RDI: ffffffff830c3260 RBP: ffff8801a1dff748 R08: 0000000000000002 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81204b70 R12: ffffffff830c31e0 R13: ffffffff830d5a20 R14: ffff8801a1dff720 R15: 0000000000000002 FS: 0000000000de6940(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000075c000 CR3: 00000001d7e9b000 CR4: 00000000001606b0 DR0: 0001000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: ffffffff84245368c 0000000000000022c 1ffff100343bfecfc 00000002ffc149f0c 0000000000000000c ffffffff82e2bde8c ffffffff81204b70c 1ffff100343bfed4c ffffe8ffffc149f0c 0000000041b58ab3c ffffffff82e2bde8c ffffffff81204b70c Call Trace: [<0000000080316b26>] trace_lock_acquire include/trace/events/lock.h:12 [inline] [<0000000080316b26>] lock_acquire+0x29a/0x3d0 kernel/locking/lockdep.c:3755 [<00000000a09c942d>] rcu_lock_acquire include/linux/rcupdate.h:491 [inline] [<00000000a09c942d>] rcu_read_lock include/linux/rcupdate.h:873 [inline] [<00000000a09c942d>] avc_reclaim_node security/selinux/avc.c:529 [inline] [<00000000a09c942d>] avc_alloc_node security/selinux/avc.c:559 [inline] [<00000000a09c942d>] avc_alloc_node+0x1a2/0x3c0 security/selinux/avc.c:547 [<00000000dad8aaa5>] avc_insert security/selinux/avc.c:670 [inline] [<00000000dad8aaa5>] avc_compute_av+0x182/0x610 security/selinux/avc.c:976 [<00000000eb6c6c3c>] avc_has_perm_noaudit+0x2a8/0x300 security/selinux/avc.c:1112 [<00000000fabf8ebe>] cred_has_capability+0x138/0x2a0 security/selinux/hooks.c:1688 [<00000000cbe7abe1>] selinux_capable+0x36/0x40 security/selinux/hooks.c:2200 [<000000004249bb71>] security_capable+0x88/0xc0 security/security.c:189 [<0000000055b54be5>] ns_capable_common+0x73/0x160 kernel/capability.c:373 [<00000000161d3ad8>] ns_capable+0x23/0x30 kernel/capability.c:395 [<0000000009259009>] do_ipt_get_ctl+0xfc/0xa10 net/ipv4/netfilter/ip_tables.c:1712 [<0000000064f76988>] nf_sockopt net/netfilter/nf_sockopt.c:103 [inline] [<0000000064f76988>] nf_getsockopt+0x70/0xd0 net/netfilter/nf_sockopt.c:121 [<0000000040f61c24>] ip_getsockopt net/ipv4/ip_sockglue.c:1555 [inline] [<0000000040f61c24>] ip_getsockopt+0x133/0x180 net/ipv4/ip_sockglue.c:1540 [<0000000071d3c816>] tcp_getsockopt net/ipv4/tcp.c:3107 [inline] [<0000000071d3c816>] tcp_getsockopt+0x8a/0xe0 net/ipv4/tcp.c:3101 [<0000000028968ccd>] sock_common_getsockopt+0x9a/0xe0 net/core/sock.c:2669 [<00000000b6419c89>] SYSC_getsockopt net/socket.c:1817 [inline] [<00000000b6419c89>] SyS_getsockopt+0x143/0x220 net/socket.c:1799 [<0000000020f41cfb>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000cb88d896>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: cf1 cf1 cf1 cc7 c40 c04 cf1 cf1 c04 cf2 cc7 c40 c08 c00 cf3 cf3 cf3 c65 c48 c8b c04 c25 c28 c00 c00 c00 c48 c89 c45 cd0 c31 cc0 c48 c89 cf8 c48 cc1 ce8 c03 c80 c3c c10 c00 c<0f> c85 c75 c03 c00 c00 c49 c8d c45 c18 c4d c8b cbc c24 c80 c00 c00 c00 c48 c89 cc2 c