[ 50.160277][ T26] audit: type=1800 audit(1555138769.353:30): pid=7933 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 54.555828][ T26] kauditd_printk_skb: 4 callbacks suppressed [ 54.555843][ T26] audit: type=1400 audit(1555138773.783:35): avc: denied { map } for pid=8109 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.153' (ECDSA) to the list of known hosts. [ 61.099451][ T26] audit: type=1400 audit(1555138780.323:36): avc: denied { map } for pid=8121 comm="syz-executor969" path="/root/syz-executor969096914" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 61.139010][ T8122] IPVS: ftp: loaded support on port[0] = 21 [ 61.199102][ T8122] chnl_net:caif_netlink_parms(): no params data found [ 61.232854][ T8122] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.240650][ T8122] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.248361][ T8122] device bridge_slave_0 entered promiscuous mode [ 61.257201][ T8122] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.264373][ T8122] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.272097][ T8122] device bridge_slave_1 entered promiscuous mode [ 61.288721][ T8122] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 61.298926][ T8122] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 61.316832][ T8122] team0: Port device team_slave_0 added [ 61.324208][ T8122] team0: Port device team_slave_1 added [ 61.391651][ T8122] device hsr_slave_0 entered promiscuous mode [ 61.440400][ T8122] device hsr_slave_1 entered promiscuous mode [ 61.517730][ T8122] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.524980][ T8122] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.532900][ T8122] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.540038][ T8122] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.576187][ T8122] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.587368][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.597561][ T22] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.605880][ T22] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.614052][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 61.626459][ T8122] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.636451][ T2813] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.645150][ T2813] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.652237][ T2813] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.670660][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.679041][ T22] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.686151][ T22] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.694851][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.703649][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.712485][ T8125] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.725644][ T8122] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 61.736568][ T8122] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 61.757857][ T8122] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 61.765488][ T8125] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 61.774305][ T8125] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.782977][ T8125] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 208.719947][ T1039] INFO: task syz-executor969:8122 blocked for more than 143 seconds. [ 208.728647][ T1039] Not tainted 5.1.0-rc4+ #65 [ 208.736009][ T1039] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 208.745496][ T1039] syz-executor969 D23920 8122 8121 0x00000000 [ 208.753598][ T1039] Call Trace: [ 208.757087][ T1039] __schedule+0x817/0x1cc0 [ 208.766574][ T1039] ? __sched_text_start+0x8/0x8 [ 208.773230][ T1039] ? rwsem_down_read_failed+0x1db/0x420 [ 208.778810][ T1039] ? _raw_spin_unlock_irq+0x28/0x90 [ 208.784574][ T1039] ? lockdep_hardirqs_on+0x418/0x5d0 [ 208.791450][ T1039] schedule+0x92/0x180 [ 208.795742][ T1039] rwsem_down_read_failed+0x213/0x420 [ 208.802661][ T1039] ? __rwsem_down_read_failed_common.part.0+0x80/0x80 [ 208.809557][ T1039] ? mark_held_locks+0xf0/0xf0 [ 208.815825][ T1039] call_rwsem_down_read_failed+0x18/0x30 [ 208.822023][ T1039] down_read+0x49/0x90 [ 208.826137][ T1039] ? __do_page_fault+0x9e9/0xda0 [ 208.833381][ T1039] __do_page_fault+0x9e9/0xda0 [ 208.838281][ T1039] ? trace_hardirqs_off_caller+0x65/0x220 [ 208.844867][ T1039] do_page_fault+0x71/0x581 [ 208.849404][ T1039] ? page_fault+0x8/0x30 [ 208.855177][ T1039] page_fault+0x1e/0x30 [ 208.859362][ T1039] RIP: 0033:0x4ad510 [ 208.863766][ T1039] Code: Bad RIP value. [ 208.867936][ T1039] RSP: 002b:00007ffeca29cf48 EFLAGS: 00010202 [ 208.875481][ T1039] RAX: 00000000004ad510 RBX: 0000000000000001 RCX: 00000000006e27b0 [ 208.885194][ T1039] RDX: 00000000004088d0 RSI: 0000000000000001 RDI: 00000000004cedf0 [ 208.894810][ T1039] RBP: 00007ffeca29cf50 R08: 00000000006dbfb0 R09: 00000000006dbfb0 [ 208.903283][ T1039] R10: 00007ffeca29cfd0 R11: 0000000000000000 R12: 0000000000000001 [ 208.912717][ T1039] R13: 00000000006e27a0 R14: 000000000000002d R15: 0000000000000006 [ 208.921864][ T1039] [ 208.921864][ T1039] Showing all locks held in the system: [ 208.929639][ T1039] 1 lock held by khungtaskd/1039: [ 208.936189][ T1039] #0: 0000000002a816fb (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 208.946250][ T1039] 1 lock held by rsyslogd/7971: [ 208.952638][ T1039] #0: 0000000087322ba9 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 208.962784][ T1039] 2 locks held by getty/8093: [ 208.967480][ T1039] #0: 0000000015ef38c7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 208.978314][ T1039] #1: 000000004fe72512 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 208.988451][ T1039] 2 locks held by getty/8094: [ 208.994613][ T1039] #0: 000000003efce27c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 209.004668][ T1039] #1: 000000002f94ed0f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 209.016235][ T1039] 2 locks held by getty/8095: [ 209.021435][ T1039] #0: 0000000002926a81 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 209.032026][ T1039] #1: 00000000c7c48c76 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 209.042260][ T1039] 2 locks held by getty/8096: [ 209.047127][ T1039] #0: 0000000087fa386a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 209.057557][ T1039] #1: 00000000100107b6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 209.067632][ T1039] 2 locks held by getty/8097: [ 209.073743][ T1039] #0: 00000000c7a879bb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 209.083364][ T1039] #1: 000000002802b64a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 209.095322][ T1039] 2 locks held by getty/8098: [ 209.100515][ T1039] #0: 0000000098f38e6a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 209.109488][ T1039] #1: 00000000b317aac2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 209.120588][ T1039] 2 locks held by getty/8099: [ 209.125477][ T1039] #0: 0000000086d314db (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 209.135253][ T1039] #1: 0000000067ae6b54 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 209.146358][ T1039] 1 lock held by syz-executor969/8122: [ 209.152283][ T1039] #0: 00000000b0e46ea1 (&mm->mmap_sem){++++}, at: __do_page_fault+0x9e9/0xda0 [ 209.162784][ T1039] 2 locks held by syz-executor969/8128: [ 209.168379][ T1039] [ 209.171193][ T1039] ============================================= [ 209.171193][ T1039] [ 209.179636][ T1039] NMI backtrace for cpu 0 [ 209.184115][ T1039] CPU: 0 PID: 1039 Comm: khungtaskd Not tainted 5.1.0-rc4+ #65 [ 209.191754][ T1039] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 209.202002][ T1039] Call Trace: [ 209.205350][ T1039] dump_stack+0x172/0x1f0 [ 209.209704][ T1039] nmi_cpu_backtrace.cold+0x63/0xa4 [ 209.214931][ T1039] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 209.220587][ T1039] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 209.226600][ T1039] arch_trigger_cpumask_backtrace+0x14/0x20 [ 209.232510][ T1039] watchdog+0x9b7/0xec0 [ 209.237566][ T1039] kthread+0x357/0x430 [ 209.241653][ T1039] ? reset_hung_task_detector+0x30/0x30 [ 209.247318][ T1039] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 209.253771][ T1039] ret_from_fork+0x3a/0x50 [ 209.258361][ T1039] Sending NMI from CPU 0 to CPUs 1: [ 209.264303][ C1] NMI backtrace for cpu 1 [ 209.264310][ C1] CPU: 1 PID: 8128 Comm: syz-executor969 Not tainted 5.1.0-rc4+ #65 [ 209.264316][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 209.264320][ C1] RIP: 0010:match_held_lock+0x1a/0x500 [ 209.264332][ C1] Code: 0b ff ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 89 fb <48> 83 c7 10 48 89 fa 48 83 ec 08 48 c1 ea 03 80 3c 02 00 0f 85 ec [ 209.264336][ C1] RSP: 0018:ffff888082fef808 EFLAGS: 00000002 [ 209.264344][ C1] RAX: dffffc0000000000 RBX: ffff8880916f4bc0 RCX: ffff8880916f4bc0 [ 209.264350][ C1] RDX: 1ffff110122de977 RSI: ffffffff889a5940 RDI: ffff8880916f4bc0 [ 209.264355][ C1] RBP: ffff888082fef830 R08: ffffffff81876d69 R09: ffffed10130fd1ff [ 209.264360][ C1] R10: ffff888082fefa98 R11: ffff8880987e8ff7 R12: ffffed10122de977 [ 209.264365][ C1] R13: ffff8880916f4bc0 R14: ffffffff889a5940 R15: 0000000000000000 [ 209.264371][ C1] FS: 00007fb2094fd700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 209.264375][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 209.264381][ C1] CR2: ffffffffff600400 CR3: 000000009f2b1000 CR4: 00000000001406e0 [ 209.264386][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 209.264391][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 209.264394][ C1] Call Trace: [ 209.264398][ C1] lock_is_held_type+0x1b8/0x320 [ 209.264401][ C1] ? perf_mmap+0x749/0x1800 [ 209.264405][ C1] ___might_sleep+0x201/0x280 [ 209.264408][ C1] ? perf_mmap+0x749/0x1800 [ 209.264412][ C1] __might_sleep+0x95/0x190 [ 209.264415][ C1] __mutex_lock+0xc8/0x1310 [ 209.264419][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 209.264422][ C1] ? perf_mmap+0x749/0x1800 [ 209.264426][ C1] ? lock_downgrade+0x880/0x880 [ 209.264430][ C1] ? mutex_trylock+0x1e0/0x1e0 [ 209.264433][ C1] ? kasan_check_write+0x14/0x20 [ 209.264437][ C1] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 209.264441][ C1] ? retint_kernel+0x2d/0x2d [ 209.264445][ C1] ? wait_for_completion+0x440/0x440 [ 209.264448][ C1] mutex_lock_nested+0x16/0x20 [ 209.264452][ C1] ? mutex_lock_nested+0x16/0x20 [ 209.264455][ C1] perf_mmap+0x749/0x1800 [ 209.264459][ C1] ? perf_release+0x50/0x50 [ 209.264462][ C1] ? memset+0x32/0x40 [ 209.264465][ C1] mmap_region+0xc3a/0x1770 [ 209.264469][ C1] ? __x64_sys_brk+0x760/0x760 [ 209.264473][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 209.264477][ C1] ? get_unmapped_area+0x295/0x3b0 [ 209.264480][ C1] do_mmap+0x8e2/0x1080 [ 209.264484][ C1] vm_mmap_pgoff+0x1c5/0x230 [ 209.264488][ C1] ? vma_is_stack_for_current+0xd0/0xd0 [ 209.264491][ C1] ? ksys_dup3+0x3e0/0x3e0 [ 209.264495][ C1] ksys_mmap_pgoff+0x4aa/0x630 [ 209.264499][ C1] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 209.264503][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 209.264507][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 209.264510][ C1] ? do_syscall_64+0x26/0x610 [ 209.264514][ C1] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 209.264518][ C1] __x64_sys_mmap+0xe9/0x1b0 [ 209.264521][ C1] do_syscall_64+0x103/0x610 [ 209.264525][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 209.264529][ C1] RIP: 0033:0x447739 [ 209.264540][ C1] Code: e8 8c 19 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 209.264543][ C1] RSP: 002b:00007fb2094fcda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 209.264553][ C1] RAX: ffffffffffffffda RBX: 00000000006ddc58 RCX: 0000000000447739 [ 209.264558][ C1] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 [ 209.264564][ C1] RBP: 00000000006ddc50 R08: 0000000000000003 R09: 0000000000000000 [ 209.264569][ C1] R10: 0000000000001011 R11: 0000000000000246 R12: 00000000006ddc5c [ 209.264574][ C1] R13: 00007ffeca29cf2f R14: 00007fb2094fd9c0 R15: 0000000000000005 [ 209.268844][ T1039] Kernel panic - not syncing: hung_task: blocked tasks [ 209.659727][ T1039] CPU: 0 PID: 1039 Comm: khungtaskd Not tainted 5.1.0-rc4+ #65 [ 209.667290][ T1039] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 209.677469][ T1039] Call Trace: [ 209.680786][ T1039] dump_stack+0x172/0x1f0 [ 209.685150][ T1039] panic+0x2cb/0x65c [ 209.689156][ T1039] ? __warn_printk+0xf3/0xf3 [ 209.693795][ T1039] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 209.699466][ T1039] ? ___preempt_schedule+0x16/0x18 [ 209.704604][ T1039] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 209.710784][ T1039] ? nmi_trigger_cpumask_backtrace+0x1fa/0x236 [ 209.716964][ T1039] ? nmi_trigger_cpumask_backtrace+0x204/0x236 [ 209.723245][ T1039] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 209.729515][ T1039] watchdog+0x9c8/0xec0 [ 209.733705][ T1039] kthread+0x357/0x430 [ 209.737808][ T1039] ? reset_hung_task_detector+0x30/0x30 [ 209.743382][ T1039] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 209.749665][ T1039] ret_from_fork+0x3a/0x50 [ 209.755792][ T1039] Kernel Offset: disabled [ 209.760244][ T1039] Rebooting in 86400 seconds..