[....] Starting enhanced syslogd: rsyslogd[ 17.087112] audit: type=1400 audit(1517446725.698:5): avc: denied { syslog } for pid=4012 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 22.732739] audit: type=1400 audit(1517446731.344:6): avc: denied { map } for pid=4152 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 '10.128.0.18' (ECDSA) to the list of known hosts. [ 29.001564] audit: type=1400 audit(1517446737.613:7): avc: denied { map } for pid=4166 comm="syzkaller201544" path="/root/syzkaller201544460" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz6.router_solicitations = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 30.890711] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.545731] ================================================================== [ 34.553136] BUG: KASAN: use-after-free in perf_trace_lock_acquire+0x5b7/0x980 [ 34.560397] Read of size 8 at addr ffff8801c07de138 by task syzkaller201544/6125 [ 34.567916] [ 34.569535] CPU: 1 PID: 6125 Comm: syzkaller201544 Not tainted 4.15.0+ #198 [ 34.576619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.585959] Call Trace: [ 34.588537] dump_stack+0x194/0x257 [ 34.592152] ? arch_local_irq_restore+0x53/0x53 [ 34.596797] ? show_regs_print_info+0x18/0x18 [ 34.601270] ? perf_trace_lock_acquire+0x5b7/0x980 [ 34.606173] print_address_description+0x73/0x250 [ 34.610988] ? perf_trace_lock_acquire+0x5b7/0x980 [ 34.615890] kasan_report+0x25b/0x340 [ 34.619661] __asan_report_load8_noabort+0x14/0x20 [ 34.624564] perf_trace_lock_acquire+0x5b7/0x980 [ 34.629291] ? lock_release+0xa40/0xa40 [ 34.633245] ? usleep_range+0x190/0x190 [ 34.637198] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 34.643055] ? perf_trace_lock+0x900/0x900 [ 34.647262] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.651731] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.656719] ? trace_hardirqs_on+0xd/0x10 [ 34.660836] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.665300] ? wait_for_completion+0xe0/0x770 [ 34.669766] ? wait_for_completion_interruptible+0x7e0/0x7e0 [ 34.675534] ? __lockdep_init_map+0xe4/0x650 [ 34.679920] ? llist_add_batch+0xf3/0x180 [ 34.684050] ? find_last_bit+0xd0/0xd0 [ 34.687917] lock_acquire+0x394/0x580 [ 34.691700] ? remove_wait_queue+0x81/0x350 [ 34.696011] ? lock_release+0xa40/0xa40 [ 34.699974] ? vhost_work_queue+0xc0/0xc0 [ 34.704106] ? vhost_poll_stop+0x90/0x90 [ 34.708146] ? wait_for_completion+0x770/0x770 [ 34.712702] _raw_spin_lock_irqsave+0x96/0xc0 [ 34.717171] ? remove_wait_queue+0x81/0x350 [ 34.721466] remove_wait_queue+0x81/0x350 [ 34.725590] ? add_wait_queue+0x290/0x290 [ 34.729718] ? vhost_poll_flush+0x3f/0x60 [ 34.733840] ? vhost_net_flush+0x209/0x2a0 [ 34.738049] vhost_dev_stop+0x15c/0x2a0 [ 34.742000] ? vhost_net_compat_ioctl+0x30/0x30 [ 34.746648] vhost_net_release+0x6e/0x190 [ 34.750768] __fput+0x327/0x7e0 [ 34.754023] ? fput+0x140/0x140 [ 34.757284] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 34.763148] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.767617] ____fput+0x15/0x20 [ 34.770868] task_work_run+0x199/0x270 [ 34.774729] ? task_work_cancel+0x210/0x210 [ 34.779032] ? _raw_spin_unlock+0x22/0x30 [ 34.783164] ? switch_task_namespaces+0x87/0xc0 [ 34.787817] do_exit+0x9bb/0x1ad0 [ 34.791243] ? find_held_lock+0x35/0x1d0 [ 34.795280] ? mm_update_next_owner+0x930/0x930 [ 34.799928] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 34.805096] ? lock_downgrade+0x980/0x980 [ 34.809219] ? __unqueue_futex+0x1c0/0x290 [ 34.813422] ? lock_release+0xa40/0xa40 [ 34.817366] ? fault_in_user_writeable+0x90/0x90 [ 34.822093] ? do_raw_spin_trylock+0x190/0x190 [ 34.826650] ? futex_wake+0x680/0x680 [ 34.830425] ? perf_trace_lock_acquire+0xe3/0x980 [ 34.835238] ? futex_wait+0x6a9/0x9a0 [ 34.839014] ? perf_trace_lock+0x900/0x900 [ 34.843229] ? check_noncircular+0x20/0x20 [ 34.847451] ? perf_event_sync_stat+0x5b0/0x5b0 [ 34.852113] ? __perf_event_task_sched_in+0x200/0xc20 [ 34.857296] ? memset+0x31/0x40 [ 34.860568] ? find_held_lock+0x35/0x1d0 [ 34.864617] ? get_signal+0x7a9/0x16d0 [ 34.868477] ? lock_downgrade+0x980/0x980 [ 34.872598] do_group_exit+0x149/0x400 [ 34.876466] ? do_raw_spin_trylock+0x190/0x190 [ 34.881025] ? SyS_exit+0x30/0x30 [ 34.884457] ? _raw_spin_unlock_irq+0x27/0x70 [ 34.888927] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.893917] get_signal+0x73a/0x16d0 [ 34.897604] ? ptrace_notify+0x130/0x130 [ 34.901639] ? __schedule+0x8f3/0x2060 [ 34.905497] ? __sched_text_start+0x8/0x8 [ 34.909614] ? vhost_net_ioctl+0x2af/0x1910 [ 34.913910] do_signal+0x90/0x1eb0 [ 34.917420] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 34.923278] ? rcu_note_context_switch+0x710/0x710 [ 34.928177] ? setup_sigcontext+0x7d0/0x7d0 [ 34.932470] ? __might_sleep+0x95/0x190 [ 34.936417] ? schedule+0xf5/0x430 [ 34.939932] ? __schedule+0x2060/0x2060 [ 34.943886] ? exit_to_usermode_loop+0x8c/0x310 [ 34.948530] exit_to_usermode_loop+0x214/0x310 [ 34.953092] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 34.958604] ? lock_downgrade+0x980/0x980 [ 34.962726] ? do_fast_syscall_32+0x156/0xf9d [ 34.967205] do_fast_syscall_32+0xbfd/0xf9d [ 34.971509] ? do_raw_spin_trylock+0x190/0x190 [ 34.976072] ? do_int80_syscall_32+0x9d0/0x9d0 [ 34.980639] ? syscall_return_slowpath+0x2ad/0x550 [ 34.985539] ? prepare_exit_to_usermode+0x340/0x340 [ 34.990532] ? sysret32_from_system_call+0x5/0x3b [ 34.995348] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.000165] entry_SYSENTER_compat+0x54/0x63 [ 35.004546] RIP: 0023:0xf7f19c79 [ 35.007881] RSP: 002b:00000000f7eb212c EFLAGS: 00000292 ORIG_RAX: 00000000000000f0 [ 35.015558] RAX: fffffffffffffe00 RBX: 0000000008100f94 RCX: 0000000000000000 [ 35.022800] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000008100f94 [ 35.030044] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 35.037296] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.044543] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.051789] [ 35.053387] Allocated by task 6098: [ 35.056987] save_stack+0x43/0xd0 [ 35.060416] kasan_kmalloc+0xad/0xe0 [ 35.064113] kmem_cache_alloc_trace+0x136/0x750 [ 35.068767] eventfd_file_create.part.3+0x96/0x250 [ 35.073667] SyS_eventfd+0x2c/0x80 [ 35.077181] do_fast_syscall_32+0x3ee/0xf9d [ 35.081472] entry_SYSENTER_compat+0x54/0x63 [ 35.085849] [ 35.087444] Freed by task 6125: [ 35.090694] save_stack+0x43/0xd0 [ 35.094120] kasan_slab_free+0x71/0xc0 [ 35.097978] kfree+0xd6/0x260 [ 35.101056] eventfd_ctx_put+0x26/0x30 [ 35.104918] eventfd_release+0x52/0x60 [ 35.108787] __fput+0x327/0x7e0 [ 35.112045] ____fput+0x15/0x20 [ 35.115297] task_work_run+0x199/0x270 [ 35.119157] do_exit+0x9bb/0x1ad0 [ 35.122587] do_group_exit+0x149/0x400 [ 35.126444] get_signal+0x73a/0x16d0 [ 35.130135] do_signal+0x90/0x1eb0 [ 35.133644] exit_to_usermode_loop+0x214/0x310 [ 35.138194] do_fast_syscall_32+0xbfd/0xf9d [ 35.142484] entry_SYSENTER_compat+0x54/0x63 [ 35.146857] [ 35.148458] The buggy address belongs to the object at ffff8801c07de100 [ 35.148458] which belongs to the cache kmalloc-96 of size 96 [ 35.160910] The buggy address is located 56 bytes inside of [ 35.160910] 96-byte region [ffff8801c07de100, ffff8801c07de160) [ 35.172586] The buggy address belongs to the page: [ 35.177494] page:ffffea000701f780 count:1 mapcount:0 mapping:ffff8801c07de000 index:0x0 [ 35.185609] flags: 0x2fffc0000000100(slab) [ 35.189827] raw: 02fffc0000000100 ffff8801c07de000 0000000000000000 0000000100000020 [ 35.197686] raw: ffffea00073a3620 ffffea0006cb4760 ffff8801db0004c0 0000000000000000 [ 35.205545] page dumped because: kasan: bad access detected [ 35.211222] [ 35.212818] Memory state around the buggy address: [ 35.217716] ffff8801c07de000: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.225047] ffff8801c07de080: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.232376] >ffff8801c07de100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.239704] ^ [ 35.244871] ffff8801c07de180: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.252204] ffff8801c07de200: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.259538] ================================================================== [ 35.266873] Disabling lock debugging due to kernel taint [ 35.272291] Kernel panic - not syncing: panic_on_warn set ... [ 35.272291] [ 35.279631] CPU: 1 PID: 6125 Comm: syzkaller201544 Tainted: G B 4.15.0+ #198 [ 35.288001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.297332] Call Trace: [ 35.299899] dump_stack+0x194/0x257 [ 35.303508] ? arch_local_irq_restore+0x53/0x53 [ 35.308147] ? kasan_end_report+0x32/0x50 [ 35.312269] ? lock_downgrade+0x980/0x980 [ 35.316388] ? vsnprintf+0x1ed/0x1900 [ 35.320159] ? perf_trace_lock_acquire+0x4e0/0x980 [ 35.325062] panic+0x1e4/0x41c [ 35.328226] ? refcount_error_report+0x214/0x214 [ 35.332952] ? add_taint+0x40/0x50 [ 35.336469] ? add_taint+0x1c/0x50 [ 35.339991] ? perf_trace_lock_acquire+0x5b7/0x980 [ 35.344898] kasan_end_report+0x50/0x50 [ 35.348847] kasan_report+0x144/0x340 [ 35.352618] __asan_report_load8_noabort+0x14/0x20 [ 35.357518] perf_trace_lock_acquire+0x5b7/0x980 [ 35.362244] ? lock_release+0xa40/0xa40 [ 35.366193] ? usleep_range+0x190/0x190 [ 35.370143] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 35.376010] ? perf_trace_lock+0x900/0x900 [ 35.380230] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.384699] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.389686] ? trace_hardirqs_on+0xd/0x10 [ 35.393815] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.398282] ? wait_for_completion+0xe0/0x770 [ 35.402760] ? wait_for_completion_interruptible+0x7e0/0x7e0 [ 35.408531] ? __lockdep_init_map+0xe4/0x650 [ 35.412910] ? llist_add_batch+0xf3/0x180 [ 35.417038] ? find_last_bit+0xd0/0xd0 [ 35.420903] lock_acquire+0x394/0x580 [ 35.424675] ? remove_wait_queue+0x81/0x350 [ 35.428968] ? lock_release+0xa40/0xa40 [ 35.432925] ? vhost_work_queue+0xc0/0xc0 [ 35.437042] ? vhost_poll_stop+0x90/0x90 [ 35.441079] ? wait_for_completion+0x770/0x770 [ 35.445634] _raw_spin_lock_irqsave+0x96/0xc0 [ 35.450103] ? remove_wait_queue+0x81/0x350 [ 35.454396] remove_wait_queue+0x81/0x350 [ 35.458519] ? add_wait_queue+0x290/0x290 [ 35.462638] ? vhost_poll_flush+0x3f/0x60 [ 35.466755] ? vhost_net_flush+0x209/0x2a0 [ 35.470962] vhost_dev_stop+0x15c/0x2a0 [ 35.474925] ? vhost_net_compat_ioctl+0x30/0x30 [ 35.479569] vhost_net_release+0x6e/0x190 [ 35.483696] __fput+0x327/0x7e0 [ 35.486948] ? fput+0x140/0x140 [ 35.490198] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 35.496060] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.500536] ____fput+0x15/0x20 [ 35.503786] task_work_run+0x199/0x270 [ 35.507647] ? task_work_cancel+0x210/0x210 [ 35.511946] ? _raw_spin_unlock+0x22/0x30 [ 35.516063] ? switch_task_namespaces+0x87/0xc0 [ 35.520702] do_exit+0x9bb/0x1ad0 [ 35.524128] ? find_held_lock+0x35/0x1d0 [ 35.528160] ? mm_update_next_owner+0x930/0x930 [ 35.532807] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 35.537967] ? lock_downgrade+0x980/0x980 [ 35.542088] ? __unqueue_futex+0x1c0/0x290 [ 35.546293] ? lock_release+0xa40/0xa40 [ 35.550249] ? fault_in_user_writeable+0x90/0x90 [ 35.554990] ? do_raw_spin_trylock+0x190/0x190 [ 35.559558] ? futex_wake+0x680/0x680 [ 35.563333] ? perf_trace_lock_acquire+0xe3/0x980 [ 35.568143] ? futex_wait+0x6a9/0x9a0 [ 35.571913] ? perf_trace_lock+0x900/0x900 [ 35.576122] ? check_noncircular+0x20/0x20 [ 35.580330] ? perf_event_sync_stat+0x5b0/0x5b0 [ 35.584974] ? __perf_event_task_sched_in+0x200/0xc20 [ 35.590147] ? memset+0x31/0x40 [ 35.593409] ? find_held_lock+0x35/0x1d0 [ 35.597444] ? get_signal+0x7a9/0x16d0 [ 35.601303] ? lock_downgrade+0x980/0x980 [ 35.605433] do_group_exit+0x149/0x400 [ 35.609303] ? do_raw_spin_trylock+0x190/0x190 [ 35.613855] ? SyS_exit+0x30/0x30 [ 35.617284] ? _raw_spin_unlock_irq+0x27/0x70 [ 35.621762] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.626757] get_signal+0x73a/0x16d0 [ 35.630453] ? ptrace_notify+0x130/0x130 [ 35.634501] ? __schedule+0x8f3/0x2060 [ 35.638369] ? __sched_text_start+0x8/0x8 [ 35.642492] ? vhost_net_ioctl+0x2af/0x1910 [ 35.646789] do_signal+0x90/0x1eb0 [ 35.650304] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 35.656163] ? rcu_note_context_switch+0x710/0x710 [ 35.661065] ? setup_sigcontext+0x7d0/0x7d0 [ 35.665357] ? __might_sleep+0x95/0x190 [ 35.669303] ? schedule+0xf5/0x430 [ 35.672814] ? __schedule+0x2060/0x2060 [ 35.676764] ? exit_to_usermode_loop+0x8c/0x310 [ 35.681413] exit_to_usermode_loop+0x214/0x310 [ 35.685984] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 35.691493] ? lock_downgrade+0x980/0x980 [ 35.695611] ? do_fast_syscall_32+0x156/0xf9d [ 35.700081] do_fast_syscall_32+0xbfd/0xf9d [ 35.704374] ? do_raw_spin_trylock+0x190/0x190 [ 35.708926] ? do_int80_syscall_32+0x9d0/0x9d0 [ 35.713482] ? syscall_return_slowpath+0x2ad/0x550 [ 35.718384] ? prepare_exit_to_usermode+0x340/0x340 [ 35.723373] ? sysret32_from_system_call+0x5/0x3b [ 35.728198] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.733017] entry_SYSENTER_compat+0x54/0x63 [ 35.737400] RIP: 0023:0xf7f19c79 [ 35.740741] RSP: 002b:00000000f7eb212c EFLAGS: 00000292 ORIG_RAX: 00000000000000f0 [ 35.748427] RAX: fffffffffffffe00 RBX: 0000000008100f94 RCX: 0000000000000000 [ 35.755668] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000008100f94 [ 35.762909] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 35.770152] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.777402] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.785088] Dumping ftrace buffer: [ 35.788603] (ftrace buffer empty) [ 35.792283] Kernel Offset: disabled [ 35.795877] Rebooting in 86400 seconds..