[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 9.096775][ T22] audit: type=1400 audit(1582333830.240:10): avc: denied { watch } for pid=1794 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [ 9.105740][ T22] audit: type=1400 audit(1582333830.240:11): avc: denied { watch } for pid=1794 comm="restorecond" path="/etc/selinux/restorecond.conf" dev="sda1" ino=2280 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [....] 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: [ 12.283257][ T22] audit: type=1400 audit(1582333833.430:12): avc: denied { map } for pid=1868 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 '10.128.10.32' (ECDSA) to the list of known hosts. executing program [ 18.501020][ T22] audit: type=1400 audit(1582333839.650:13): avc: denied { map } for pid=1880 comm="syz-executor795" path="/root/syz-executor795274727" 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 [ 18.502743][ T1880] BUG: unable to handle page fault for address: ffffebde0009ddc8 [ 18.507864][ T1880] #PF: supervisor read access in kernel mode [ 18.509216][ T1880] #PF: error_code(0x0000) - not-present page [ 18.510489][ T1880] PGD 0 P4D 0 [ 18.511278][ T1880] Oops: 0000 [#1] PREEMPT SMP KASAN [ 18.512572][ T1880] CPU: 0 PID: 1880 Comm: syz-executor795 Not tainted 5.4.21-syzkaller-00756-ge12432318607 #0 [ 18.514414][ T1880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.517147][ T1880] RIP: 0010:kfree+0xd6/0x6d0 [ 18.518017][ T1880] Code: f0 02 eb 0a 48 bb 00 00 00 80 7f 77 00 00 4c 01 e3 48 81 eb 00 00 00 80 48 c1 eb 06 48 83 e3 c0 48 b9 00 00 00 00 00 ea ff ff <48> 8b 44 0b 08 a8 01 0f 85 a9 01 00 00 48 01 cb 48 8b 43 08 48 89 [ 18.522790][ T1880] RSP: 0018:ffff8881d0a5f278 EFLAGS: 00010206 [ 18.528929][ T1880] RAX: ffffffff7fffffff RBX: 000001de0009ddc0 RCX: ffffea0000000000 [ 18.536991][ T1880] RDX: 0000000000000000 RSI: ffffffff84648db0 RDI: 0000000002777259 [ 18.545043][ T1880] RBP: ffff8881d0a5f2f0 R08: 0000000000000005 R09: ffffffff8140a965 [ 18.552994][ T1880] R10: ffff8881d36b0ec0 R11: 000000000000000a R12: 0000000002777259 [ 18.560962][ T1880] R13: ffff8881cfdb4800 R14: ffffffff8140a9fc R15: 0000000000000001 [ 18.568917][ T1880] FS: 0000000001ff6880(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 [ 18.577918][ T1880] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.584488][ T1880] CR2: ffffebde0009ddc8 CR3: 00000001d79bf006 CR4: 00000000001606f0 [ 18.592432][ T1880] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.600375][ T1880] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.608318][ T1880] Call Trace: [ 18.611585][ T1880] ? audit_data_to_entry+0x225c/0x26c0 [ 18.617017][ T1880] ? audit_unpack_string+0x92/0x1b0 [ 18.622206][ T1880] audit_data_to_entry+0x225c/0x26c0 [ 18.627465][ T1880] ? audit_rule_change+0x1110/0x1110 [ 18.632720][ T1880] ? unwind_next_frame+0x415/0x870 [ 18.637802][ T1880] audit_rule_change+0xbe/0x1110 [ 18.642710][ T1880] ? selinux_capable+0x39/0x50 [ 18.647445][ T1880] ? security_capable+0xb2/0xd0 [ 18.652326][ T1880] ? audit_match_signal+0xc70/0xc70 [ 18.657498][ T1880] ? ns_capable+0x8c/0xe0 [ 18.661823][ T1880] audit_receive+0xe73/0x3750 [ 18.666483][ T1880] ? jhash+0x750/0x750 [ 18.670539][ T1880] ? audit_net_exit+0x90/0x90 [ 18.675190][ T1880] ? __alloc_skb+0x109/0x540 [ 18.679768][ T1880] ? jhash+0x750/0x750 [ 18.683810][ T1880] ? avc_has_perm+0x15f/0x260 [ 18.688456][ T1880] ? __rcu_read_lock+0x50/0x50 [ 18.693209][ T1880] ? __rcu_read_lock+0x50/0x50 [ 18.697945][ T1880] ? __netlink_lookup+0x585/0x600 [ 18.702938][ T1880] ? netlink_deliver_tap+0xa4/0x7e0 [ 18.708105][ T1880] ? netlink_autobind+0x1c0/0x1c0 [ 18.713099][ T1880] ? __rcu_read_lock+0x50/0x50 [ 18.717860][ T1880] ? selinux_vm_enough_memory+0x160/0x160 [ 18.723662][ T1880] netlink_unicast+0x87c/0xa20 [ 18.728444][ T1880] ? netlink_detachskb+0x60/0x60 [ 18.733366][ T1880] ? security_netlink_send+0xab/0xc0 [ 18.738630][ T1880] netlink_sendmsg+0x9a7/0xd40 [ 18.743372][ T1880] ? netlink_getsockopt+0x900/0x900 [ 18.748546][ T1880] ? security_socket_sendmsg+0xad/0xc0 [ 18.754006][ T1880] ? netlink_getsockopt+0x900/0x900 [ 18.759181][ T1880] ____sys_sendmsg+0x56f/0x860 [ 18.763930][ T1880] ? __sys_sendmsg_sock+0x2a0/0x2a0 [ 18.769218][ T1880] ? __kasan_check_read+0x11/0x20 [ 18.774233][ T1880] ? __kasan_check_read+0x11/0x20 [ 18.779234][ T1880] ? __fdget+0x156/0x200 [ 18.783454][ T1880] __sys_sendmsg+0x26a/0x350 [ 18.788016][ T1880] ? ____sys_sendmsg+0x860/0x860 [ 18.792927][ T1880] ? finish_fault+0x230/0x230 [ 18.797575][ T1880] ? __up_read+0x6f/0x1b0 [ 18.801877][ T1880] ? __down_read+0x240/0x240 [ 18.806442][ T1880] __x64_sys_sendmsg+0x7f/0x90 [ 18.811188][ T1880] do_syscall_64+0xc0/0x100 [ 18.815671][ T1880] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 18.821546][ T1880] RIP: 0033:0x4401a9 [ 18.825417][ T1880] 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 [ 18.845116][ T1880] RSP: 002b:00007fff7bcc98b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 18.853561][ T1880] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401a9 [ 18.861510][ T1880] RDX: 0000000000000000 RSI: 00000000200004c0 RDI: 0000000000000003 [ 18.869464][ T1880] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 18.877421][ T1880] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a30 [ 18.885420][ T1880] R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000 [ 18.893440][ T1880] Modules linked in: [ 18.897317][ T1880] CR2: ffffebde0009ddc8 [ 18.901450][ T1880] ---[ end trace 86c8434d524dcd85 ]--- [ 18.906939][ T1880] RIP: 0010:kfree+0xd6/0x6d0 [ 18.911585][ T1880] Code: f0 02 eb 0a 48 bb 00 00 00 80 7f 77 00 00 4c 01 e3 48 81 eb 00 00 00 80 48 c1 eb 06 48 83 e3 c0 48 b9 00 00 00 00 00 ea ff ff <48> 8b 44 0b 08 a8 01 0f 85 a9 01 00 00 48 01 cb 48 8b 43 08 48 89 [ 18.931222][ T1880] RSP: 0018:ffff8881d0a5f278 EFLAGS: 00010206 [ 18.937439][ T1880] RAX: ffffffff7fffffff RBX: 000001de0009ddc0 RCX: ffffea0000000000 [ 18.945492][ T1880] RDX: 0000000000000000 RSI: ffffffff84648db0 RDI: 0000000002777259 [ 18.953448][ T1880] RBP: ffff8881d0a5f2f0 R08: 0000000000000005 R09: ffffffff8140a965 [ 18.961402][ T1880] R10: ffff8881d36b0ec0 R11: 000000000000000a R12: 0000000002777259 [ 18.969366][ T1880] R13: ffff8881cfdb4800 R14: ffffffff8140a9fc R15: 0000000000000001 [ 18.977360][ T1880] FS: 0000000001ff6880(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 [ 18.986328][ T1880] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.992899][ T1880] CR2: ffffebde0009ddc8 CR3: 00000001d79bf006 CR4: 00000000001606f0 [ 19.000910][ T1880] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 19.008868][ T1880] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 19.016882][ T1880] Kernel panic - not syncing: Fatal exception [ 19.023599][ T1880] Kernel Offset: disabled [ 19.028106][ T1880] Rebooting in 86400 seconds..