[....] Starting enhanced syslogd: rsyslogd[ 16.962594] audit: type=1400 audit(1520364684.550:5): avc: denied { syslog } for pid=4082 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: [ 22.283090] audit: type=1400 audit(1520364689.870:6): avc: denied { map } for pid=4221 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 '10.128.0.53' (ECDSA) to the list of known hosts. executing program [ 28.583962] audit: type=1400 audit(1520364696.171:7): avc: denied { map } for pid=4235 comm="syzkaller555090" path="/root/syzkaller555090218" 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 [ 28.588528] WARNING: CPU: 0 PID: 4235 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 [ 28.617788] Kernel panic - not syncing: panic_on_warn set ... [ 28.617788] [ 28.625120] CPU: 0 PID: 4235 Comm: syzkaller555090 Not tainted 4.16.0-rc4+ #343 [ 28.632537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.641869] Call Trace: [ 28.644426] dump_stack+0x194/0x24d [ 28.648026] ? arch_local_irq_restore+0x53/0x53 [ 28.652667] ? vsnprintf+0x1ed/0x1900 [ 28.656445] panic+0x1e4/0x41c [ 28.659606] ? refcount_error_report+0x214/0x214 [ 28.664330] ? show_regs_print_info+0x18/0x18 [ 28.668799] ? __warn+0x1c1/0x200 [ 28.672224] ? kmalloc_slab+0x5d/0x70 [ 28.675990] __warn+0x1dc/0x200 [ 28.679239] ? kmalloc_slab+0x5d/0x70 [ 28.683010] report_bug+0x211/0x2d0 [ 28.686611] fixup_bug.part.11+0x37/0x80 [ 28.690639] do_error_trap+0x2d7/0x3e0 [ 28.694495] ? proc_do_uuid+0x270/0x270 [ 28.698440] ? math_error+0x400/0x400 [ 28.702210] ? __radix_tree_lookup+0x435/0x5e0 [ 28.706773] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.711587] do_invalid_op+0x1b/0x20 [ 28.715267] invalid_op+0x1b/0x40 [ 28.718686] RIP: 0010:kmalloc_slab+0x5d/0x70 [ 28.723060] RSP: 0018:ffff8801cec3f970 EFLAGS: 00010246 [ 28.728395] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: ffffffff819733cb [ 28.735632] RDX: ffffffff8423372f RSI: 0000000000000000 RDI: 00000000b03bf8c2 [ 28.742876] RBP: ffff8801cec3f970 R08: 0000000000000000 R09: 0000000000000000 [ 28.750114] R10: ffffffff88613380 R11: 0000000000000000 R12: 00000000b03bf8c2 [ 28.757352] R13: 0000000020000080 R14: 00000000014200c0 R15: ffff8801cec3fa68 [ 28.764604] ? memdup_user+0x1b/0x90 [ 28.768291] ? ucma_set_option+0x11f/0x4d0 [ 28.772506] __kmalloc_track_caller+0x21/0x760 [ 28.777059] ? ucma_set_option+0x11f/0x4d0 [ 28.781267] memdup_user+0x2c/0x90 [ 28.784775] ucma_set_option+0x11f/0x4d0 [ 28.788803] ? __might_sleep+0x95/0x190 [ 28.792745] ? ucma_set_ib_path.isra.14+0x850/0x850 [ 28.797732] ? kasan_check_write+0x14/0x20 [ 28.801937] ? _copy_from_user+0x99/0x110 [ 28.806057] ucma_write+0x2d6/0x3d0 [ 28.809655] ? ucma_set_ib_path.isra.14+0x850/0x850 [ 28.814644] ? ucma_resolve_route+0x1a0/0x1a0 [ 28.819118] ? ucma_resolve_route+0x1a0/0x1a0 [ 28.823584] __vfs_write+0xef/0x970 [ 28.827183] ? rcu_note_context_switch+0x710/0x710 [ 28.832083] ? kernel_read+0x120/0x120 [ 28.835940] ? __might_sleep+0x95/0x190 [ 28.839887] ? _cond_resched+0x14/0x30 [ 28.843744] ? __inode_security_revalidate+0xd9/0x130 [ 28.848904] ? avc_policy_seqno+0x9/0x20 [ 28.852947] ? selinux_file_permission+0x82/0x460 [ 28.857764] ? security_file_permission+0x89/0x1e0 [ 28.862666] ? rw_verify_area+0xe5/0x2b0 [ 28.866693] ? __fdget_raw+0x20/0x20 [ 28.870378] vfs_write+0x189/0x510 [ 28.873892] SyS_write+0xef/0x220 [ 28.877315] ? filp_open+0x70/0x70 [ 28.880825] ? SyS_read+0x220/0x220 [ 28.884424] ? do_syscall_64+0xb7/0x940 [ 28.888374] ? SyS_read+0x220/0x220 [ 28.891971] do_syscall_64+0x281/0x940 [ 28.895826] ? __do_page_fault+0xc90/0xc90 [ 28.900032] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.904759] ? syscall_return_slowpath+0x550/0x550 [ 28.909658] ? syscall_return_slowpath+0x2ac/0x550 [ 28.914558] ? prepare_exit_to_usermode+0x350/0x350 [ 28.919543] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 28.924882] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.929703] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 28.934862] RIP: 0033:0x43fdd9 [ 28.938020] RSP: 002b:00007ffcf9f02398 EFLAGS: 00000217 ORIG_RAX: 0000000000000001 [ 28.945697] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdd9 [ 28.952936] RDX: 0000000000000026 RSI: 0000000020000040 RDI: 0000000000000003 [ 28.960175] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 28.967418] R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401700 [ 28.974659] R13: 0000000000401790 R14: 0000000000000000 R15: 0000000000000000 [ 28.982468] Dumping ftrace buffer: [ 28.986072] (ftrace buffer empty) [ 28.989752] Kernel Offset: disabled [ 28.993352] Rebooting in 86400 seconds..