[....] Starting enhanced syslogd: rsyslogd[ 17.334956] audit: type=1400 audit(1518105362.949:5): avc: denied { syslog } for pid=4054 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: [ 23.005428] audit: type=1400 audit(1518105368.620:6): avc: denied { map } for pid=4196 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 '10.128.0.47' (ECDSA) to the list of known hosts. executing program [ 50.543164] audit: type=1400 audit(1518105396.157:7): avc: denied { map } for pid=4212 comm="syzkaller515149" path="/root/syzkaller515149686" 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 [ 50.546379] WARNING: CPU: 1 PID: 4212 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 50.577074] Kernel panic - not syncing: panic_on_warn set ... [ 50.577074] [ 50.584414] CPU: 1 PID: 4212 Comm: syzkaller515149 Not tainted 4.15.0+ #302 [ 50.591486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.600809] Call Trace: [ 50.603373] dump_stack+0x194/0x257 [ 50.606975] ? arch_local_irq_restore+0x53/0x53 [ 50.611622] ? vsnprintf+0x1ed/0x1900 [ 50.615442] panic+0x1e4/0x41c [ 50.618638] ? refcount_error_report+0x214/0x214 [ 50.623366] ? show_regs_print_info+0x18/0x18 [ 50.627843] ? __warn+0x1c1/0x200 [ 50.631276] ? kmalloc_slab+0x5d/0x70 [ 50.635050] __warn+0x1dc/0x200 [ 50.638301] ? kmalloc_slab+0x5d/0x70 [ 50.642077] report_bug+0x211/0x2d0 [ 50.645686] fixup_bug.part.11+0x37/0x80 [ 50.649734] do_error_trap+0x2d7/0x3e0 [ 50.653592] ? entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 50.658931] ? math_error+0x400/0x400 [ 50.662705] ? find_held_lock+0x35/0x1d0 [ 50.666740] ? print_irqtrace_events+0x270/0x270 [ 50.671470] ? check_noncircular+0x20/0x20 [ 50.675676] ? __lock_is_held+0xb6/0x140 [ 50.679716] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.684542] do_invalid_op+0x1b/0x20 [ 50.688231] invalid_op+0x22/0x40 [ 50.691656] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 50.696034] RSP: 0018:ffff8801b2177510 EFLAGS: 00010246 [ 50.701369] RAX: 0000000000000000 RBX: ffff8801b213c2c0 RCX: ffffffff81726d07 [ 50.708612] RDX: 1ffff100364dfa02 RSI: 0000000000000000 RDI: 0000000040d80008 [ 50.715854] RBP: ffff8801b2177510 R08: 1ffff1003642ee19 R09: 0000000000000000 [ 50.723096] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b26fd010 [ 50.730341] R13: 0000000000000000 R14: 00000000014000c0 R15: ffffffff868bab20 [ 50.737598] ? relay_open_buf.part.10+0x97/0x9b0 [ 50.742334] __kmalloc+0x25/0x760 [ 50.745760] ? kmem_cache_alloc_trace+0x459/0x740 [ 50.750580] ? relay_open_buf.part.10+0xc8/0x9b0 [ 50.755333] relay_open_buf.part.10+0xc8/0x9b0 [ 50.759898] relay_open+0x57a/0xa40 [ 50.763502] ? relay_open_buf.part.10+0x9b0/0x9b0 [ 50.768325] ? __debugfs_create_file+0x2cf/0x3d0 [ 50.773061] ? debugfs_create_file+0x57/0x70 [ 50.777448] do_blk_trace_setup+0x4a4/0xcd0 [ 50.781750] ? blk_tracer_print_line+0x40/0x40 [ 50.786306] ? __might_sleep+0x95/0x190 [ 50.790264] ? kasan_check_write+0x14/0x20 [ 50.794474] ? _copy_from_user+0x99/0x110 [ 50.798601] __blk_trace_setup+0xbe/0x150 [ 50.802724] ? do_blk_trace_setup+0xcd0/0xcd0 [ 50.807198] ? disk_name+0x98/0x100 [ 50.810818] blk_trace_ioctl+0x206/0x2e0 [ 50.814857] ? blk_add_trace_rq_remap+0x680/0x680 [ 50.819685] ? avc_has_extended_perms+0x7fa/0x12c0 [ 50.824592] blkdev_ioctl+0x1845/0x1e00 [ 50.828542] ? blkpg_ioctl+0xb40/0xb40 [ 50.832402] ? avc_ss_reset+0x110/0x110 [ 50.836361] ? __pmd_alloc+0x4e0/0x4e0 [ 50.840224] ? check_noncircular+0x20/0x20 [ 50.844433] ? kmem_cache_free+0x83/0x2a0 [ 50.848553] ? putname+0xee/0x130 [ 50.851981] ? do_sys_open+0x31b/0x6d0 [ 50.855934] ? SyS_open+0x2d/0x40 [ 50.859375] ? find_held_lock+0x35/0x1d0 [ 50.863427] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 50.869293] ? rcu_note_context_switch+0x710/0x710 [ 50.874206] block_ioctl+0xde/0x120 [ 50.877812] ? blkdev_fallocate+0x3b0/0x3b0 [ 50.882107] do_vfs_ioctl+0x1b1/0x1520 [ 50.885975] ? ioctl_preallocate+0x2b0/0x2b0 [ 50.890360] ? selinux_capable+0x40/0x40 [ 50.894396] ? up_read+0x1a/0x40 [ 50.897737] ? do_sys_open+0x320/0x6d0 [ 50.901608] ? security_file_ioctl+0x7d/0xb0 [ 50.905988] ? security_file_ioctl+0x89/0xb0 [ 50.910374] SyS_ioctl+0x8f/0xc0 [ 50.913715] ? do_vfs_ioctl+0x1520/0x1520 [ 50.917839] do_syscall_64+0x282/0x940 [ 50.921701] ? __do_page_fault+0xc90/0xc90 [ 50.925910] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.930642] ? syscall_return_slowpath+0x550/0x550 [ 50.935547] ? syscall_return_slowpath+0x2ac/0x550 [ 50.940452] ? prepare_exit_to_usermode+0x350/0x350 [ 50.945447] ? retint_user+0x18/0x18 [ 50.949141] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.953962] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 50.959127] RIP: 0033:0x443e79 [ 50.962289] RSP: 002b:00007ffefdf1a1c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 50.969971] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e79 [ 50.977217] RDX: 0000000020872000 RSI: 00000000c0481273 RDI: 0000000000000003 [ 50.984474] RBP: 00000000006ce018 R08: 0000000000000000 R09: 0000000000000000 [ 50.991715] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401b20 [ 50.998957] R13: 0000000000401bb0 R14: 0000000000000000 R15: 0000000000000000 [ 51.006697] Dumping ftrace buffer: [ 51.010303] (ftrace buffer empty) [ 51.013989] Kernel Offset: disabled [ 51.017592] Rebooting in 86400 seconds..