Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 32.999313] kauditd_printk_skb: 9 callbacks suppressed [ 32.999324] audit: type=1800 audit(1543150627.576:33): pid=6051 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 33.027706] audit: type=1800 audit(1543150627.576:34): pid=6051 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.479361] audit: type=1400 audit(1543150632.056:35): avc: denied { map } for pid=6227 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 '10.128.0.44' (ECDSA) to the list of known hosts. [ 44.088938] audit: type=1400 audit(1543150638.666:36): avc: denied { map } for pid=6240 comm="syz-executor408" path="/root/syz-executor408993878" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 44.092866] ================================================================== executing program [ 44.115602] audit: type=1400 audit(1543150638.666:37): avc: denied { map_create } for pid=6240 comm="syz-executor408" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 44.122700] BUG: KASAN: slab-out-of-bounds in queue_stack_map_push_elem+0x185/0x290 [ 44.145411] audit: type=1400 audit(1543150638.666:38): avc: denied { map_read map_write } for pid=6240 comm="syz-executor408" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 44.153098] Write of size 262146 at addr ffff8881bc0023c8 by task syz-executor408/6240 [ 44.153102] [ 44.153117] CPU: 1 PID: 6240 Comm: syz-executor408 Not tainted 4.20.0-rc3+ #128 [ 44.153128] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.202945] Call Trace: [ 44.205530] dump_stack+0x244/0x39d [ 44.209142] ? dump_stack_print_info.cold.1+0x20/0x20 [ 44.214312] ? printk+0xa7/0xcf [ 44.217584] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 44.222326] print_address_description.cold.7+0x9/0x1ff [ 44.227672] kasan_report.cold.8+0x242/0x309 [ 44.232063] ? queue_stack_map_push_elem+0x185/0x290 [ 44.237254] check_memory_region+0x13e/0x1b0 [ 44.241646] memcpy+0x37/0x50 [ 44.244737] queue_stack_map_push_elem+0x185/0x290 [ 44.249649] ? queue_map_pop_elem+0x30/0x30 [ 44.253955] map_update_elem+0x605/0xf60 [ 44.258000] __x64_sys_bpf+0x32d/0x520 [ 44.261870] ? bpf_prog_get+0x20/0x20 [ 44.265665] do_syscall_64+0x1b9/0x820 [ 44.269533] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.274877] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.279786] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.284611] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.289612] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.294609] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.299615] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.304441] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.309610] RIP: 0033:0x4400e9 [ 44.312788] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 44.331700] RSP: 002b:00007fffb6c23a38 EFLAGS: 00000213 ORIG_RAX: 0000000000000141 [ 44.339388] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 44.346669] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002 [ 44.353922] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 44.361173] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970 [ 44.368426] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 44.375686] [ 44.377297] Allocated by task 6240: [ 44.380912] save_stack+0x43/0xd0 [ 44.384347] kasan_kmalloc+0xc7/0xe0 [ 44.388052] __kmalloc_node+0x50/0x70 [ 44.391834] bpf_map_area_alloc+0x3f/0x90 [ 44.395965] queue_stack_map_alloc+0x192/0x290 [ 44.400529] map_create+0x3bd/0x1110 [ 44.404220] __x64_sys_bpf+0x303/0x520 [ 44.408090] do_syscall_64+0x1b9/0x820 [ 44.411959] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.417123] [ 44.418732] Freed by task 3770: [ 44.421998] save_stack+0x43/0xd0 [ 44.425440] __kasan_slab_free+0x102/0x150 [ 44.429669] kasan_slab_free+0xe/0x10 [ 44.433451] kfree+0xcf/0x230 [ 44.436536] kernfs_fop_release+0x12b/0x1a0 [ 44.440837] __fput+0x385/0xa30 [ 44.444096] ____fput+0x15/0x20 [ 44.447361] task_work_run+0x1e8/0x2a0 [ 44.451230] exit_to_usermode_loop+0x318/0x380 [ 44.455794] do_syscall_64+0x6be/0x820 [ 44.459763] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.464930] [ 44.466540] The buggy address belongs to the object at ffff8881bc002280 [ 44.466540] which belongs to the cache kmalloc-512 of size 512 [ 44.479177] The buggy address is located 328 bytes inside of [ 44.479177] 512-byte region [ffff8881bc002280, ffff8881bc002480) [ 44.491028] The buggy address belongs to the page: [ 44.495938] page:ffffea0006f00080 count:1 mapcount:0 mapping:ffff8881da800940 index:0x0 [ 44.504094] flags: 0x2fffc0000000200(slab) [ 44.508312] raw: 02fffc0000000200 ffffea0006f0a748 ffffea0006e65a08 ffff8881da800940 [ 44.516174] raw: 0000000000000000 ffff8881bc002000 0000000100000006 0000000000000000 [ 44.524032] page dumped because: kasan: bad access detected [ 44.529716] [ 44.531319] Memory state around the buggy address: [ 44.536227] ffff8881bc002300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.543569] ffff8881bc002380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.550907] >ffff8881bc002400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.558242] ^ [ 44.561587] ffff8881bc002480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.568940] ffff8881bc002500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.576278] ================================================================== [ 44.583612] Disabling lock debugging due to kernel taint [ 44.589040] Kernel panic - not syncing: panic_on_warn set ... [ 44.594905] CPU: 1 PID: 6240 Comm: syz-executor408 Tainted: G B 4.20.0-rc3+ #128 [ 44.603718] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.613047] Call Trace: [ 44.615621] dump_stack+0x244/0x39d [ 44.619234] ? dump_stack_print_info.cold.1+0x20/0x20 [ 44.624408] panic+0x2ad/0x55c [ 44.627583] ? add_taint.cold.5+0x16/0x16 [ 44.631724] ? add_taint.cold.5+0x5/0x16 [ 44.635768] ? trace_hardirqs_off+0xaf/0x310 [ 44.640174] kasan_end_report+0x47/0x4f [ 44.644125] kasan_report.cold.8+0x76/0x309 [ 44.648429] ? queue_stack_map_push_elem+0x185/0x290 [ 44.653515] check_memory_region+0x13e/0x1b0 [ 44.657906] memcpy+0x37/0x50 [ 44.660998] queue_stack_map_push_elem+0x185/0x290 [ 44.665908] ? queue_map_pop_elem+0x30/0x30 [ 44.670209] map_update_elem+0x605/0xf60 [ 44.674249] __x64_sys_bpf+0x32d/0x520 [ 44.678118] ? bpf_prog_get+0x20/0x20 [ 44.681905] do_syscall_64+0x1b9/0x820 [ 44.685775] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.691119] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.696029] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.700870] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.705874] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.710874] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.715871] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.720696] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.725865] RIP: 0033:0x4400e9 [ 44.729039] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 44.747921] RSP: 002b:00007fffb6c23a38 EFLAGS: 00000213 ORIG_RAX: 0000000000000141 [ 44.755628] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9 [ 44.762876] RDX: 0000000000000020 RSI: 0000000020000040 RDI: 0000000000000002 [ 44.770124] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 44.777372] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401970 [ 44.784618] R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000 [ 44.793280] Kernel Offset: disabled [ 44.796901] Rebooting in 86400 seconds..