[....] Starting enhanced syslogd: rsyslogd[ 16.089260] audit: type=1400 audit(1520671156.404:5): avc: denied { syslog } for pid=4086 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: [ 18.970040] audit: type=1400 audit(1520671159.284:6): avc: denied { map } for pid=4224 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 '10.128.0.40' (ECDSA) to the list of known hosts. executing program [ 48.580252] audit: type=1400 audit(1520671188.895:7): avc: denied { map } for pid=4241 comm="syzkaller643123" path="/root/syzkaller643123986" 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 [ 48.606799] WARNING: CPU: 1 PID: 4241 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 48.614763] Kernel panic - not syncing: panic_on_warn set ... [ 48.614763] [ 48.622097] CPU: 1 PID: 4241 Comm: syzkaller643123 Not tainted 4.16.0-rc4+ #348 [ 48.629511] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.638834] Call Trace: [ 48.641400] dump_stack+0x194/0x24d [ 48.645006] ? arch_local_irq_restore+0x53/0x53 [ 48.649650] ? vsnprintf+0x1ed/0x1900 [ 48.653428] panic+0x1e4/0x41c [ 48.656592] ? refcount_error_report+0x214/0x214 [ 48.661316] ? show_regs_print_info+0x18/0x18 [ 48.665788] ? __warn+0x1c1/0x200 [ 48.669215] ? kmalloc_slab+0x5d/0x70 [ 48.672985] __warn+0x1dc/0x200 [ 48.676235] ? kmalloc_slab+0x5d/0x70 [ 48.680009] report_bug+0x1f4/0x2b0 [ 48.683613] fixup_bug.part.11+0x37/0x80 [ 48.687645] do_error_trap+0x2d7/0x3e0 [ 48.691502] ? proc_do_uuid+0x270/0x270 [ 48.695447] ? math_error+0x400/0x400 [ 48.699322] ? __radix_tree_lookup+0x435/0x5e0 [ 48.703884] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.708703] do_invalid_op+0x1b/0x20 [ 48.712386] invalid_op+0x1b/0x40 [ 48.715809] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 48.720190] RSP: 0018:ffff8801a97cf970 EFLAGS: 00010246 [ 48.725522] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: ffffffff819733eb [ 48.732776] RDX: ffffffff8423426f RSI: 0000000000000000 RDI: 00000000ffde933e [ 48.740016] RBP: ffff8801a97cf970 R08: 0000000000000000 R09: 0000000000000000 [ 48.747262] R10: ffffffff88613380 R11: 0000000000000000 R12: 00000000ffde933e [ 48.754503] R13: 0000000020000000 R14: 00000000014200c0 R15: ffff8801a97cfa68 [ 48.761758] ? memdup_user+0x1b/0x90 [ 48.765442] ? ucma_set_option+0x11f/0x4d0 [ 48.769658] __kmalloc_track_caller+0x21/0x760 [ 48.774217] ? ucma_set_option+0x11f/0x4d0 [ 48.778431] memdup_user+0x2c/0x90 [ 48.781941] ucma_set_option+0x11f/0x4d0 [ 48.785974] ? __might_sleep+0x95/0x190 [ 48.789928] ? ucma_set_ib_path.isra.14+0x850/0x850 [ 48.794929] ? kasan_check_write+0x14/0x20 [ 48.799135] ? _copy_from_user+0x99/0x110 [ 48.803258] ucma_write+0x2d6/0x3d0 [ 48.806854] ? ucma_set_ib_path.isra.14+0x850/0x850 [ 48.811842] ? ucma_resolve_route+0x1a0/0x1a0 [ 48.816317] ? ucma_resolve_route+0x1a0/0x1a0 [ 48.820783] __vfs_write+0xef/0x970 [ 48.824381] ? rcu_note_context_switch+0x710/0x710 [ 48.829281] ? kernel_read+0x120/0x120 [ 48.833141] ? __might_sleep+0x95/0x190 [ 48.837092] ? _cond_resched+0x14/0x30 [ 48.840949] ? __inode_security_revalidate+0xd9/0x130 [ 48.846110] ? avc_policy_seqno+0x9/0x20 [ 48.850138] ? selinux_file_permission+0x82/0x460 [ 48.854954] ? security_file_permission+0x89/0x1e0 [ 48.859854] ? rw_verify_area+0xe5/0x2b0 [ 48.863884] ? __fdget_raw+0x20/0x20 [ 48.867567] vfs_write+0x189/0x510 [ 48.871079] SyS_write+0xef/0x220 [ 48.874501] ? filp_open+0x70/0x70 [ 48.878012] ? SyS_read+0x220/0x220 [ 48.881610] ? do_syscall_64+0xb7/0x940 [ 48.885555] ? SyS_read+0x220/0x220 [ 48.889170] do_syscall_64+0x281/0x940 [ 48.893029] ? __do_page_fault+0xc90/0xc90 [ 48.897232] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.901961] ? syscall_return_slowpath+0x550/0x550 [ 48.906859] ? syscall_return_slowpath+0x2ac/0x550 [ 48.911771] ? prepare_exit_to_usermode+0x350/0x350 [ 48.916762] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 48.922117] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.926952] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 48.932129] RIP: 0033:0x43fdc9 [ 48.935288] RSP: 002b:00007ffe85188138 EFLAGS: 00000217 ORIG_RAX: 0000000000000001 [ 48.942963] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdc9 [ 48.950211] RDX: 0000000000000020 RSI: 0000000020000c80 RDI: 0000000000000003 [ 48.957450] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 48.964687] R10: 00000000004002c8 R11: 0000000000000217 R12: 00000000004016f0 [ 48.971924] R13: 0000000000401780 R14: 0000000000000000 R15: 0000000000000000 [ 48.979331] Dumping ftrace buffer: [ 48.982906] (ftrace buffer empty) [ 48.986588] Kernel Offset: disabled [ 48.990188] Rebooting in 86400 seconds..