[....] Starting enhanced syslogd: rsyslogd[ 17.117649] audit: type=1400 audit(1517939973.382:5): avc: denied { syslog } for pid=4005 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 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: [ 21.835266] audit: type=1400 audit(1517939978.100:6): avc: denied { map } for pid=4145 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 '10.128.15.229' (ECDSA) to the list of known hosts. executing program [ 28.187734] audit: type=1400 audit(1517939984.452:7): avc: denied { map } for pid=4159 comm="syzkaller032522" path="/root/syzkaller032522586" 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 [ 28.191945] WARNING: CPU: 0 PID: 4159 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 28.221636] Kernel panic - not syncing: panic_on_warn set ... [ 28.221636] [ 28.228971] CPU: 0 PID: 4159 Comm: syzkaller032522 Not tainted 4.15.0+ #299 [ 28.236042] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.245366] Call Trace: [ 28.247928] dump_stack+0x194/0x257 [ 28.251529] ? arch_local_irq_restore+0x53/0x53 [ 28.256172] ? vsnprintf+0x1ed/0x1900 [ 28.259948] panic+0x1e4/0x41c [ 28.263113] ? refcount_error_report+0x214/0x214 [ 28.267845] ? show_regs_print_info+0x18/0x18 [ 28.272321] ? __warn+0x1c1/0x200 [ 28.275752] ? kmalloc_slab+0x5d/0x70 [ 28.279525] __warn+0x1dc/0x200 [ 28.282775] ? kmalloc_slab+0x5d/0x70 [ 28.286550] report_bug+0x211/0x2d0 [ 28.290153] fixup_bug.part.11+0x37/0x80 [ 28.294186] do_error_trap+0x2d7/0x3e0 [ 28.298046] ? entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 28.303389] ? math_error+0x400/0x400 [ 28.307163] ? find_held_lock+0x35/0x1d0 [ 28.311198] ? print_irqtrace_events+0x270/0x270 [ 28.315927] ? check_noncircular+0x20/0x20 [ 28.320132] ? __lock_is_held+0xb6/0x140 [ 28.324170] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.328989] do_invalid_op+0x1b/0x20 [ 28.332678] invalid_op+0x22/0x40 [ 28.336102] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 28.340478] RSP: 0018:ffff8801b128f510 EFLAGS: 00010246 [ 28.345813] RAX: 0000000000000000 RBX: ffff8801cb661180 RCX: ffffffff81726847 [ 28.353057] RDX: 1ffff100397e0e02 RSI: 0000000000000000 RDI: 00000000b0d80008 [ 28.360306] RBP: ffff8801b128f510 R08: 1ffff10036251e16 R09: 0000000000000000 [ 28.367548] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cbf07010 [ 28.374786] R13: 0000000000000000 R14: 00000000014000c0 R15: ffffffff868bab20 [ 28.382049] ? relay_open_buf.part.10+0x97/0x9b0 [ 28.386784] __kmalloc+0x25/0x760 [ 28.390209] ? kmem_cache_alloc_trace+0x456/0x750 [ 28.395036] ? relay_open_buf.part.10+0xc8/0x9b0 [ 28.399769] relay_open_buf.part.10+0xc8/0x9b0 [ 28.404325] ? find_next_bit+0x27/0x30 [ 28.408189] relay_open+0x57a/0xa40 [ 28.411794] ? relay_open_buf.part.10+0x9b0/0x9b0 [ 28.416617] ? __debugfs_create_file+0x2cf/0x3d0 [ 28.421351] ? debugfs_create_file+0x57/0x70 [ 28.425738] do_blk_trace_setup+0x4a4/0xcd0 [ 28.430044] ? blk_tracer_print_line+0x40/0x40 [ 28.434602] ? __might_sleep+0x95/0x190 [ 28.438556] ? kasan_check_write+0x14/0x20 [ 28.442764] ? _copy_from_user+0x99/0x110 [ 28.446889] __blk_trace_setup+0xbe/0x150 [ 28.451015] ? do_blk_trace_setup+0xcd0/0xcd0 [ 28.455496] ? disk_name+0x98/0x100 [ 28.459104] blk_trace_ioctl+0x206/0x2e0 [ 28.463135] ? blk_add_trace_rq_remap+0x680/0x680 [ 28.467956] ? avc_has_extended_perms+0x7fa/0x12c0 [ 28.472865] blkdev_ioctl+0x1845/0x1e00 [ 28.476813] ? blkpg_ioctl+0xb40/0xb40 [ 28.480672] ? avc_ss_reset+0x110/0x110 [ 28.484622] ? __handle_mm_fault+0x80e/0x3ce0 [ 28.489099] ? __pmd_alloc+0x4e0/0x4e0 [ 28.492961] ? check_noncircular+0x20/0x20 [ 28.497170] ? kasan_slab_free+0x71/0xc0 [ 28.501203] ? kmem_cache_free+0x83/0x2a0 [ 28.505321] ? putname+0xee/0x130 [ 28.508750] ? find_held_lock+0x35/0x1d0 [ 28.512800] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 28.518657] ? rcu_note_context_switch+0x710/0x710 [ 28.523573] block_ioctl+0xde/0x120 [ 28.527185] ? blkdev_fallocate+0x3b0/0x3b0 [ 28.531488] do_vfs_ioctl+0x1b1/0x1520 [ 28.535357] ? ioctl_preallocate+0x2b0/0x2b0 [ 28.539740] ? selinux_capable+0x40/0x40 [ 28.543778] ? up_read+0x1a/0x40 [ 28.547119] ? do_sys_open+0x320/0x6d0 [ 28.550987] ? security_file_ioctl+0x7d/0xb0 [ 28.555367] ? security_file_ioctl+0x89/0xb0 [ 28.559752] SyS_ioctl+0x8f/0xc0 [ 28.563090] ? do_vfs_ioctl+0x1520/0x1520 [ 28.567213] do_syscall_64+0x282/0x940 [ 28.571074] ? __do_page_fault+0xc90/0xc90 [ 28.575281] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.580015] ? syscall_return_slowpath+0x550/0x550 [ 28.584926] ? syscall_return_slowpath+0x2ac/0x550 [ 28.589832] ? prepare_exit_to_usermode+0x350/0x350 [ 28.594825] ? retint_user+0x18/0x18 [ 28.598515] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.603337] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 28.608497] RIP: 0033:0x443e79 [ 28.611657] RSP: 002b:00007ffe0625e398 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 28.619335] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e79 [ 28.626575] RDX: 0000000020beaf68 RSI: 00000000c0481273 RDI: 0000000000000003 [ 28.633818] RBP: 00000000006ce018 R08: 0000000000000000 R09: 0000000000000000 [ 28.641062] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000401b20 [ 28.648302] R13: 0000000000401bb0 R14: 0000000000000000 R15: 0000000000000000 [ 28.656200] Dumping ftrace buffer: [ 28.659822] (ftrace buffer empty) [ 28.663508] Kernel Offset: disabled [ 28.667106] Rebooting in 86400 seconds..