[?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. [ 19.502669] audit: type=1400 audit(1520377300.616:6): avc: denied { map } for pid=4260 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 61.451759] audit: type=1400 audit(1520377342.565:7): avc: denied { map } for pid=4277 comm="syzkaller584356" path="/root/syzkaller584356328" 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 [ 61.488497] kasan: CONFIG_KASAN_INLINE enabled [ 61.493176] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 61.500748] general protection fault: 0000 [#1] SMP KASAN [ 61.506262] Dumping ftrace buffer: [ 61.509770] (ftrace buffer empty) [ 61.513454] Modules linked in: [ 61.516622] CPU: 0 PID: 4279 Comm: syzkaller584356 Not tainted 4.16.0-rc4+ #343 [ 61.524057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.533407] RIP: 0010:rdma_join_multicast+0x46d/0x3bb0 [ 61.538653] RSP: 0018:ffff8801d3bdf570 EFLAGS: 00010202 [ 61.543988] RAX: 0000000000000000 RBX: ffff8801d5b30000 RCX: 0000000000000029 [ 61.551237] RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000148 [ 61.558480] RBP: ffff8801d3bdf870 R08: ffff8801db227fc0 R09: 1ffff1003a77be8c [ 61.565721] R10: ffff8801d3bdf120 R11: 0000000000000001 R12: ffff8801afd264c0 [ 61.572961] R13: ffff8801d5b300ad R14: 0000000000000000 R15: ffff8801afd266c0 [ 61.580203] FS: 00007fdb9d9e6700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 61.588399] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.594253] CR2: 000055b03ff56470 CR3: 00000001afddc006 CR4: 00000000001606f0 [ 61.601500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.608740] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.615981] Call Trace: [ 61.618545] ? find_held_lock+0x35/0x1d0 [ 61.622594] ? rdma_resolve_route+0x2010/0x2010 [ 61.627239] ? __radix_tree_replace+0x1af/0x310 [ 61.631887] ? node_tag_clear+0xf2/0x180 [ 61.635931] ? radix_tree_iter_tag_clear+0x97/0xd0 [ 61.640840] ? __mutex_unlock_slowpath+0xe9/0xac0 [ 61.645659] ? wait_for_completion+0x770/0x770 [ 61.650231] ? idr_alloc+0x127/0x180 [ 61.653939] ucma_process_join+0x4da/0xa90 [ 61.658143] ? ucma_process_join+0x4da/0xa90 [ 61.662529] ? ucma_set_option+0x4d0/0x4d0 [ 61.666751] ? __might_sleep+0x95/0x190 [ 61.670707] ? kasan_check_write+0x14/0x20 [ 61.674919] ? _copy_from_user+0x99/0x110 [ 61.679044] ucma_join_multicast+0xa5/0x110 [ 61.683338] ? ucma_process_join+0xa90/0xa90 [ 61.687749] ? kasan_check_write+0x14/0x20 [ 61.691954] ? _copy_from_user+0x99/0x110 [ 61.696080] ucma_write+0x2d6/0x3d0 [ 61.699679] ? ucma_process_join+0xa90/0xa90 [ 61.704067] ? ucma_resolve_route+0x1a0/0x1a0 [ 61.708540] ? fd_install+0x4d/0x60 [ 61.712147] ? ucma_resolve_route+0x1a0/0x1a0 [ 61.716612] __vfs_write+0xef/0x970 [ 61.720211] ? rcu_note_context_switch+0x710/0x710 [ 61.725119] ? kernel_read+0x120/0x120 [ 61.728982] ? __might_sleep+0x95/0x190 [ 61.732935] ? _cond_resched+0x14/0x30 [ 61.736798] ? __inode_security_revalidate+0xd9/0x130 [ 61.741961] ? avc_policy_seqno+0x9/0x20 [ 61.745996] ? selinux_file_permission+0x82/0x460 [ 61.750820] ? security_file_permission+0x89/0x1e0 [ 61.755728] ? rw_verify_area+0xe5/0x2b0 [ 61.759758] ? __fdget_raw+0x20/0x20 [ 61.763447] vfs_write+0x189/0x510 [ 61.766966] SyS_write+0xef/0x220 [ 61.770395] ? SyS_read+0x220/0x220 [ 61.773998] ? do_syscall_64+0xb7/0x940 [ 61.777949] ? SyS_read+0x220/0x220 [ 61.781550] do_syscall_64+0x281/0x940 [ 61.785409] ? __do_page_fault+0xc90/0xc90 [ 61.789616] ? _raw_spin_unlock_irq+0x27/0x70 [ 61.794092] ? finish_task_switch+0x1c1/0x7e0 [ 61.798560] ? syscall_return_slowpath+0x550/0x550 [ 61.803463] ? syscall_return_slowpath+0x2ac/0x550 [ 61.808368] ? prepare_exit_to_usermode+0x350/0x350 [ 61.813357] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 61.818701] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 61.823524] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 61.828686] RIP: 0033:0x445809 [ 61.831846] RSP: 002b:00007fdb9d9e5da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 61.839529] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445809 [ 61.846770] RDX: 00000000000000a0 RSI: 00000000200001c0 RDI: 0000000000000005 [ 61.854013] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 61.861254] R10: 0000000000000000 R11: 0000000000000246 R12: 006d635f616d6472 [ 61.868502] R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 0000000000000005 [ 61.875767] Code: 00 48 c1 ea 03 80 3c 02 00 0f 85 d7 34 00 00 49 8b 04 24 48 ba 00 00 00 00 00 fc ff df 48 8d b8 48 01 00 00 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 f5 35 00 00 49 c1 e6 04 4c 03 b0 48 01 00 00 [ 61.894955] RIP: rdma_join_multicast+0x46d/0x3bb0 RSP: ffff8801d3bdf570 [ 61.901798] ---[ end trace be927aa3e5eed9d8 ]--- [ 61.906553] Kernel panic - not syncing: Fatal exception [ 61.912274] Dumping ftrace buffer: [ 61.915789] (ftrace buffer empty) [ 61.919473] Kernel Offset: disabled [ 61.923095] Rebooting in 86400 seconds..