[ 48.853722] audit: type=1800 audit(1585336739.747:31): pid=7904 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 52.213463] kauditd_printk_skb: 3 callbacks suppressed [ 52.213476] audit: type=1400 audit(1585336743.167:35): avc: denied { map } for pid=8079 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 '10.128.0.185' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 948.465948] audit: type=1400 audit(1585337639.427:36): avc: denied { map } for pid=8091 comm="syz-executor639" path="/root/syz-executor639122904" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 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 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 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 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 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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 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 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 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 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 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 executing program executing program executing program executing program executing program [ 1060.579270] ================================================================== [ 1060.586897] BUG: KASAN: use-after-free in hci_sock_bind+0x521/0x1000 [ 1060.593404] Write of size 4 at addr ffff8880a01422e0 by task syz-executor639/8329 [ 1060.601054] [ 1060.602697] CPU: 0 PID: 8329 Comm: syz-executor639 Not tainted 4.19.113-syzkaller #0 [ 1060.610586] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1060.619951] Call Trace: [ 1060.622619] dump_stack+0x188/0x20d executing program executing program executing program executing program executing program [ 1060.626271] ? hci_sock_bind+0x521/0x1000 [ 1060.630441] print_address_description.cold+0x7c/0x212 [ 1060.635738] ? hci_sock_bind+0x521/0x1000 [ 1060.639903] kasan_report.cold+0x88/0x2b9 [ 1060.644078] hci_sock_bind+0x521/0x1000 [ 1060.648075] ? hci_sock_ioctl+0x760/0x760 [ 1060.652304] __sys_bind+0x20e/0x250 [ 1060.655982] ? __ia32_sys_socketpair+0xf0/0xf0 [ 1060.660607] ? __x64_sys_futex+0x37c/0x4f0 [ 1060.665067] ? __x64_sys_futex+0x386/0x4f0 [ 1060.669664] ? do_futex+0x1b80/0x1b80 [ 1060.673489] ? __ia32_sys_read+0xb0/0xb0 executing program executing program [ 1060.677570] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1060.682349] ? trace_hardirqs_off_caller+0x55/0x210 [ 1060.687521] __x64_sys_bind+0x6f/0xb0 [ 1060.691345] ? lockdep_hardirqs_on+0x40b/0x5d0 [ 1060.696383] do_syscall_64+0xf9/0x620 [ 1060.700297] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1060.705504] RIP: 0033:0x4467e9 [ 1060.708712] Code: e8 0c e8 ff ff 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 executing program executing program executing program executing program [ 1060.727854] RSP: 002b:00007f9c63c08db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 [ 1060.735707] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004467e9 [ 1060.742996] RDX: 0000000000000006 RSI: 0000000020000080 RDI: 0000000000000004 [ 1060.750284] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 1060.757568] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 1060.764850] R13: 00007ffcd6b2faaf R14: 00007f9c63c099c0 R15: 000000000000002d [ 1060.772144] [ 1060.773817] Allocated by task 8333: [ 1060.777458] kasan_kmalloc+0xbf/0xe0 [ 1060.781192] kmem_cache_alloc_trace+0x14d/0x7a0 [ 1060.785929] hci_alloc_dev+0x3e/0x1cf0 [ 1060.789912] __vhci_create_device+0x100/0x580 [ 1060.794423] vhci_write+0x2c5/0x460 [ 1060.798061] __vfs_write+0x512/0x760 [ 1060.801788] vfs_write+0x206/0x550 [ 1060.805336] ksys_write+0x12b/0x2a0 [ 1060.808991] do_syscall_64+0xf9/0x620 [ 1060.812805] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1060.817995] [ 1060.819634] Freed by task 8327: [ 1060.822927] __kasan_slab_free+0xf7/0x140 [ 1060.827083] kfree+0xce/0x220 [ 1060.830195] bt_host_release+0x15/0x20 [ 1060.834180] device_release+0x76/0x210 [ 1060.838875] kobject_put+0x17c/0x270 [ 1060.842597] put_device+0x1c/0x30 [ 1060.846065] vhci_release+0x78/0xe0 [ 1060.849707] __fput+0x2cd/0x890 [ 1060.853015] task_work_run+0x13f/0x1b0 [ 1060.856914] do_exit+0xbcd/0x2f30 [ 1060.860392] do_group_exit+0x125/0x350 [ 1060.864290] __x64_sys_exit_group+0x3a/0x50 [ 1060.868626] do_syscall_64+0xf9/0x620 [ 1060.872437] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1060.877628] [ 1060.879264] The buggy address belongs to the object at ffff8880a0141280 [ 1060.879264] which belongs to the cache kmalloc-8192 of size 8192 [ 1060.892111] The buggy address is located 4192 bytes inside of [ 1060.892111] 8192-byte region [ffff8880a0141280, ffff8880a0143280) [ 1060.904169] The buggy address belongs to the page: [ 1060.909116] page:ffffea0002805000 count:1 mapcount:0 mapping:ffff88812c3d5080 index:0x0 compound_mapcount: 0 [ 1060.919127] flags: 0xfffe0000008100(slab|head) [ 1060.923890] raw: 00fffe0000008100 ffffea0002510908 ffffea0002378a08 ffff88812c3d5080 [ 1060.931877] raw: 0000000000000000 ffff8880a0141280 0000000100000001 0000000000000000 [ 1060.939770] page dumped because: kasan: bad access detected [ 1060.945486] [ 1060.947119] Memory state around the buggy address: [ 1060.952060] ffff8880a0142180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1060.959424] ffff8880a0142200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1060.966794] >ffff8880a0142280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1060.974164] ^ executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1060.980674] ffff8880a0142300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1060.988312] ffff8880a0142380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1060.995678] ================================================================== [ 1061.003166] Disabling lock debugging due to kernel taint [ 1061.018323] Kernel panic - not syncing: panic_on_warn set ... [ 1061.018323] executing program [ 1061.025726] CPU: 0 PID: 8329 Comm: syz-executor639 Tainted: G B 4.19.113-syzkaller #0 [ 1061.034999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1061.044370] Call Trace: [ 1061.046980] dump_stack+0x188/0x20d [ 1061.050626] panic+0x26a/0x50e [ 1061.053836] ? __warn_printk+0xf3/0xf3 [ 1061.057769] ? preempt_schedule_common+0x4a/0xc0 [ 1061.062540] ? hci_sock_bind+0x521/0x1000 [ 1061.066701] ? ___preempt_schedule+0x16/0x18 [ 1061.071125] ? trace_hardirqs_on+0x55/0x210 [ 1061.075500] ? hci_sock_bind+0x521/0x1000 executing program [ 1061.079692] kasan_end_report+0x43/0x49 [ 1061.083687] kasan_report.cold+0xa4/0x2b9 [ 1061.087883] hci_sock_bind+0x521/0x1000 [ 1061.091870] ? hci_sock_ioctl+0x760/0x760 [ 1061.096026] __sys_bind+0x20e/0x250 [ 1061.099664] ? __ia32_sys_socketpair+0xf0/0xf0 [ 1061.104265] ? __x64_sys_futex+0x37c/0x4f0 [ 1061.108506] ? __x64_sys_futex+0x386/0x4f0 [ 1061.112748] ? do_futex+0x1b80/0x1b80 [ 1061.116560] ? __ia32_sys_read+0xb0/0xb0 [ 1061.120630] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1061.125486] ? trace_hardirqs_off_caller+0x55/0x210 executing program executing program [ 1061.130522] __x64_sys_bind+0x6f/0xb0 [ 1061.134336] ? lockdep_hardirqs_on+0x40b/0x5d0 [ 1061.138934] do_syscall_64+0xf9/0x620 [ 1061.142749] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1061.147957] RIP: 0033:0x4467e9 [ 1061.151176] Code: e8 0c e8 ff ff 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 1061.170171] RSP: 002b:00007f9c63c08db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 executing program [ 1061.177891] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004467e9 [ 1061.185176] RDX: 0000000000000006 RSI: 0000000020000080 RDI: 0000000000000004 [ 1061.193414] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 1061.200789] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 1061.208068] R13: 00007ffcd6b2faaf R14: 00007f9c63c099c0 R15: 000000000000002d [ 1061.216988] Kernel Offset: disabled [ 1061.220627] Rebooting in 86400 seconds..