SELinux: unrecognized netlink message: protocol=0 nlmsg_type=53274 sclass=netlink_route_socket pig=16905 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=53274 sclass=netlink_route_socket pig=16912 comm=syz-executor7 INFO: task syz-executor2:16887 blocked for more than 120 seconds. Not tainted 4.16.0-rc5+ #262 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D20112 16887 4242 0x20020004 Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x8fb/0x1ec0 kernel/sched/core.c:3440 schedule+0xf5/0x430 kernel/sched/core.c:3499 io_schedule+0x1c/0x70 kernel/sched/core.c:5115 __blkdev_direct_IO_simple+0x7bd/0xf50 fs/block_dev.c:241 blkdev_direct_IO+0xccb/0x1060 fs/block_dev.c:428 generic_file_read_iter+0x4cc/0x28e0 mm/filemap.c:2343 blkdev_read_iter+0x105/0x170 fs/block_dev.c:1928 call_read_iter include/linux/fs.h:1775 [inline] generic_file_splice_read+0x3f9/0x7b0 fs/splice.c:307 do_splice_to+0x10a/0x160 fs/splice.c:880 splice_direct_to_actor+0x242/0x820 fs/splice.c:952 do_splice_direct+0x29b/0x3c0 fs/splice.c:1061 do_sendfile+0x5c9/0xe80 fs/read_write.c:1413 C_SYSC_sendfile fs/read_write.c:1489 [inline] compat_SyS_sendfile+0xea/0x1a0 fs/read_write.c:1478 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fbcc99 RSP: 002b:00000000f77b809c EFLAGS: 00000286 ORIG_RAX: 00000000000000bb RAX: ffffffffffffffda RBX: 0000000000000015 RCX: 0000000000000015 RDX: 00000000200000c0 RSI: 0000000000004200 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by khungtaskd/799: #0: (rcu_read_lock){....}, at: [<000000001722c90f>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<000000001722c90f>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<00000000e5980787>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470 1 lock held by rsyslogd/4035: #0: (&f->f_pos_lock){+.+.}, at: [<0000000015a765e7>] __fdget_pos+0x12b/0x190 fs/file.c:765 2 locks held by getty/4157: #0: (&tty->ldisc_sem){++++}, at: [<0000000041816228>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b023a411>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4158: #0: (&tty->ldisc_sem){++++}, at: [<0000000041816228>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b023a411>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4159: #0: (&tty->ldisc_sem){++++}, at: [<0000000041816228>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b023a411>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4161: #0: (&tty->ldisc_sem){++++}, at: [<0000000041816228>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b023a411>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4162: #0: (&tty->ldisc_sem){++++}, at: [<0000000041816228>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b023a411>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4163: #0: (&tty->ldisc_sem){++++}, at: [<0000000041816228>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b023a411>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4164: #0: (&tty->ldisc_sem){++++}, at: [<0000000041816228>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000b023a411>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 799 Comm: khungtaskd Not tainted 4.16.0-rc5+ #262 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x123/0x180 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0x90c/0xd60 kernel/hung_task.c:249 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4035 Comm: rsyslogd Not tainted 4.16.0-rc5+ #262 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_release+0x496/0xa40 kernel/locking/lockdep.c:3941 RSP: 0018:ffff8801c88b7588 EFLAGS: 00000802 RAX: dffffc0000000000 RBX: ffff8801c8bb2340 RCX: 1ffff10039176575 RDX: 1ffff10039176576 RSI: 0000000000000004 RDI: ffff8801c8bb2bb4 RBP: ffff8801c88b76b8 R08: 0000000000000000 R09: 1ffff10039116eba R10: ffff8801c88b7598 R11: 0000000000000003 R12: c7f2d6cc23299f89 R13: ffff8801c8bb2340 R14: ffff8801c88b75d0 R15: 1ffff10039116eb6 FS: 00007fbece0dc700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001cc2b2006 CR4: 00000000001606f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_release include/linux/rcupdate.h:249 [inline] rcu_read_unlock include/linux/rcupdate.h:686 [inline] avc_reclaim_node security/selinux/avc.c:538 [inline] avc_alloc_node+0x36f/0x4d0 security/selinux/avc.c:557 avc_insert security/selinux/avc.c:668 [inline] avc_compute_av+0x22a/0x710 security/selinux/avc.c:974 avc_has_perm_noaudit security/selinux/avc.c:1110 [inline] avc_has_perm+0x4be/0x680 security/selinux/avc.c:1144 selinux_syslog+0x239/0x2a0 security/selinux/hooks.c:2293 security_syslog+0x6d/0xa0 security/security.c:299 check_syslog_permissions+0x59/0x100 kernel/printk/printk.c:682 do_syslog+0x82/0xb80 kernel/printk/printk.c:1439 kmsg_read+0x74/0xa0 fs/proc/kmsg.c:40 proc_reg_read+0xe8/0x160 fs/proc/inode.c:218 __vfs_read+0xef/0xa00 fs/read_write.c:411 vfs_read+0x11e/0x350 fs/read_write.c:447 SYSC_read fs/read_write.c:573 [inline] SyS_read+0xef/0x220 fs/read_write.c:566 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7fbed0b3c1fd RSP: 002b:00007fbece0dbe30 EFLAGS: 00000293 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00000000019cb4b0 RCX: 00007fbed0b3c1fd RDX: 0000000000000fff RSI: 00007fbecf9105a0 RDI: 0000000000000004 RBP: 0000000000000000 R08: 00000000019b6260 R09: 0000000004000001 R10: 0000000000000001 R11: 0000000000000293 R12: 000000000065e420 R13: 00007fbece0dc9c0 R14: 00007fbed1181040 R15: 0000000000000003 Code: 85 f9 02 00 00 4d 89 f1 48 b8 00 00 00 00 00 fc ff df 49 c1 e9 03 41 c6 04 01 f8 65 48 8b 1c 25 c0 ed 01 00 48 8d bb 74 08 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02