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. [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 52.985709] kauditd_printk_skb: 4 callbacks suppressed [ 52.985722] audit: type=1400 audit(1547759217.815:35): avc: denied { map } for pid=8396 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 '10.128.0.169' (ECDSA) to the list of known hosts. executing program [ 64.693368] audit: type=1400 audit(1547759229.515:36): avc: denied { map } for pid=8408 comm="syz-executor077" path="/root/syz-executor077830313" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 64.723554] kasan: CONFIG_KASAN_INLINE enabled [ 64.728565] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 64.735995] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 64.742221] CPU: 1 PID: 8408 Comm: syz-executor077 Not tainted 5.0.0-rc2+ #30 [ 64.749486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.758829] RIP: 0010:fuse_dev_do_write+0x1e44/0x3780 [ 64.763998] Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 d5 18 00 00 49 8b 9f 58 01 00 00 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 39 [ 64.782877] RSP: 0018:ffff8880897a76d8 EFLAGS: 00010247 [ 64.788234] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff828b9c2a [ 64.795485] RDX: 0000000000000000 RSI: ffffffff828b9c3c RDI: 0000000000000004 [ 64.802734] RBP: ffff8880897a7aa8 R08: ffff88807b0b8380 R09: ffffed10120fd37f [ 64.809982] R10: ffffed10120fd37e R11: ffff8880907e9bf3 R12: 0000000000000000 [ 64.817230] R13: 0000000000000000 R14: 0000000000000030 R15: ffff8880907e9bd0 [ 64.824483] FS: 00000000019e3880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 64.832685] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.838544] CR2: 00007ffff0e7bfd8 CR3: 0000000092158000 CR4: 00000000001406e0 [ 64.845796] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.853058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.860307] Call Trace: [ 64.862890] ? fuse_request_free+0x80/0x80 [ 64.867132] ? fuse_dev_read+0x250/0x250 [ 64.871182] ? fuse_dev_do_read.isra.0+0x27a/0x1c90 [ 64.876179] ? print_usage_bug+0xd0/0xd0 [ 64.880222] ? fuse_dev_release+0x6b0/0x6b0 [ 64.884524] ? add_lock_to_list.isra.0+0x450/0x450 [ 64.889436] ? print_usage_bug+0xd0/0xd0 [ 64.893482] ? is_bpf_text_address+0xac/0x170 [ 64.897961] ? find_held_lock+0x35/0x120 [ 64.902006] ? is_bpf_text_address+0xac/0x170 [ 64.906488] ? lock_downgrade+0x910/0x910 [ 64.910615] ? kasan_check_read+0x11/0x20 [ 64.914746] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 64.920004] ? rcu_read_unlock_special+0x380/0x380 [ 64.924919] ? memset+0x32/0x40 [ 64.928183] fuse_dev_write+0x191/0x240 [ 64.932146] ? fuse_dev_splice_write+0xe10/0xe10 [ 64.936892] ? ___might_sleep+0x1e7/0x310 [ 64.941022] ? arch_local_save_flags+0x50/0x50 [ 64.945583] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.951150] ? iov_iter_init+0xea/0x220 [ 64.955112] __vfs_write+0x764/0xb40 [ 64.958814] ? kernel_read+0x120/0x120 [ 64.962682] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 64.968207] ? rw_verify_area+0x118/0x360 [ 64.972351] vfs_write+0x20c/0x580 [ 64.975887] ksys_write+0x105/0x260 [ 64.979507] ? __ia32_sys_read+0xb0/0xb0 [ 64.983546] ? trace_hardirqs_off_caller+0x300/0x300 [ 64.988632] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 64.993370] __x64_sys_write+0x73/0xb0 [ 64.997238] do_syscall_64+0x1a3/0x800 [ 65.001107] ? syscall_return_slowpath+0x5f0/0x5f0 [ 65.006037] ? prepare_exit_to_usermode+0x232/0x3b0 [ 65.011032] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 65.015859] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.021027] RIP: 0033:0x440279 [ 65.024198] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 65.043131] RSP: 002b:00007fffcc291d38 EFLAGS: 00000217 ORIG_RAX: 0000000000000001 [ 65.050828] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440279 [ 65.058077] RDX: 0000000000000030 RSI: 0000000020000080 RDI: 0000000000000003 [ 65.065326] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 65.072574] R10: 00000000004002c8 R11: 0000000000000217 R12: 0000000000401b00 [ 65.079825] R13: 0000000000401b90 R14: 0000000000000000 R15: 0000000000000000 [ 65.087078] Modules linked in: [ 65.090751] ---[ end trace 13a6af551cb7533c ]--- [ 65.095627] RIP: 0010:fuse_dev_do_write+0x1e44/0x3780 [ 65.100885] Code: 00 48 c1 e0 2a 80 3c 02 00 0f 85 d5 18 00 00 49 8b 9f 58 01 00 00 b8 ff ff 37 00 48 c1 e0 2a 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 39 [ 65.119809] RSP: 0018:ffff8880897a76d8 EFLAGS: 00010247 [ 65.125186] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff828b9c2a [ 65.132437] RDX: 0000000000000000 RSI: ffffffff828b9c3c RDI: 0000000000000004 [ 65.139719] RBP: ffff8880897a7aa8 R08: ffff88807b0b8380 R09: ffffed10120fd37f [ 65.146999] R10: ffffed10120fd37e R11: ffff8880907e9bf3 R12: 0000000000000000 [ 65.154250] R13: 0000000000000000 R14: 0000000000000030 R15: ffff8880907e9bd0 [ 65.161535] FS: 00000000019e3880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 65.169778] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.175677] CR2: 00007ffff0e7bfd8 CR3: 0000000092158000 CR4: 00000000001406e0 [ 65.182948] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.190350] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.197619] Kernel panic - not syncing: Fatal exception [ 65.203849] Kernel Offset: disabled [ 65.207475] Rebooting in 86400 seconds..