[ 44.003741] audit: type=1800 audit(1579492352.993:30): pid=8006 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 48.519811] kauditd_printk_skb: 4 callbacks suppressed [ 48.519826] audit: type=1400 audit(1579492357.523:35): avc: denied { map } for pid=8181 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 '10.128.1.28' (ECDSA) to the list of known hosts. executing program [ 55.412313] audit: type=1400 audit(1579492364.413:36): avc: denied { map } for pid=8193 comm="syz-executor565" path="/root/syz-executor565723063" 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 [ 55.416803] BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1333 [ 55.439365] audit: type=1400 audit(1579492364.413:37): avc: denied { create } for pid=8193 comm="syz-executor565" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 55.448172] in_atomic(): 0, irqs_disabled(): 0, pid: 8193, name: syz-executor565 [ 55.473466] audit: type=1400 audit(1579492364.413:38): avc: denied { write } for pid=8193 comm="syz-executor565" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 55.480719] 3 locks held by syz-executor565/8193: [ 55.510057] #0: 00000000bb7c8f5c (&table[i].mutex){+.+.}, at: nfnetlink_rcv_msg+0xa09/0xfcf [ 55.518712] #1: 000000000fb562a2 (rcu_read_lock){....}, at: ctnetlink_create_conntrack+0x1bb/0x1300 [ 55.528104] #2: 000000000f7e9a7e (&mm->mmap_sem){++++}, at: __do_page_fault+0x3c9/0xe90 [ 55.536396] Preemption disabled at: [ 55.536413] [] rcu_lockdep_current_cpu_online+0x37/0x1c0 [ 55.547361] CPU: 1 PID: 8193 Comm: syz-executor565 Not tainted 4.19.97-syzkaller #0 [ 55.556156] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.565503] Call Trace: [ 55.568111] dump_stack+0x197/0x210 [ 55.571736] ? rcu_lockdep_current_cpu_online+0x37/0x1c0 [ 55.577326] ___might_sleep.cold+0x1bd/0x1f6 [ 55.581732] __might_sleep+0x95/0x190 [ 55.585526] ? down_read_trylock+0x5d/0xd0 [ 55.589760] __do_page_fault+0x3f4/0xe90 [ 55.593827] ? nf_conntrack_alloc+0x38/0x50 [ 55.598143] ? ctnetlink_create_conntrack+0xd0/0x1300 [ 55.603327] ? vmalloc_fault+0x740/0x740 [ 55.607390] ? trace_hardirqs_off_caller+0x65/0x220 [ 55.612510] do_page_fault+0x71/0x57d [ 55.616445] page_fault+0x1e/0x30 [ 55.619889] RIP: 0010: (null) [ 55.623787] Code: Bad RIP value. [ 55.627164] RSP: 0018:ffff88809662f140 EFLAGS: 00010246 [ 55.632550] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdc9f8 [ 55.639819] RDX: 1ffffffff139dd36 RSI: ffff88809662f180 RDI: ffff88809662f1d0 [ 55.647082] RBP: ffff88809662f268 R08: ffff88807a80a440 R09: ffff88809662f1d0 [ 55.654363] R10: ffffed1012cc5e3f R11: ffff88809662f1ff R12: ffff88808c874a80 [ 55.661637] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff89cee978 [ 55.669024] ? nfnetlink_parse_nat_setup+0x218/0x450 [ 55.674223] ? nfnetlink_parse_nat_setup+0x256/0x450 [ 55.679359] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 55.683508] ? ctnetlink_parse_nat_setup+0xc5/0x660 [ 55.688529] ? ctnetlink_create_conntrack+0x4ea/0x1300 [ 55.693962] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 55.698922] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 55.703950] ? ctnetlink_new_conntrack+0x527/0xe50 [ 55.709007] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 55.714374] ? find_held_lock+0x35/0x130 [ 55.718454] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 55.723654] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 55.729020] ? nfnetlink_rcv_msg+0xd0d/0xfcf [ 55.733518] ? nfnetlink_bind+0x2c0/0x2c0 [ 55.737810] ? avc_has_extended_perms+0x10f0/0x10f0 [ 55.742842] ? selinux_ipv4_output+0x50/0x50 [ 55.747246] ? mark_held_locks+0x100/0x100 [ 55.751508] ? netlink_rcv_skb+0x17d/0x460 [ 55.756697] ? nfnetlink_bind+0x2c0/0x2c0 [ 55.760837] ? netlink_ack+0xb30/0xb30 [ 55.764723] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.770259] ? ns_capable+0x23/0x30 [ 55.773889] ? __netlink_ns_capable+0x104/0x140 [ 55.778565] ? nfnetlink_rcv+0x1c0/0x460 [ 55.782625] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 55.787429] ? netlink_deliver_tap+0x254/0xc20 [ 55.792016] ? kasan_check_write+0x14/0x20 [ 55.796252] ? netlink_unicast+0x53a/0x730 [ 55.800489] ? netlink_attachskb+0x770/0x770 [ 55.804889] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.810439] ? netlink_sendmsg+0x8ae/0xd70 [ 55.814684] ? netlink_unicast+0x730/0x730 [ 55.818919] ? selinux_socket_sendmsg+0x36/0x40 [ 55.823674] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.829205] ? security_socket_sendmsg+0x8d/0xc0 [ 55.833986] ? netlink_unicast+0x730/0x730 [ 55.838229] ? sock_sendmsg+0xd7/0x130 [ 55.842121] ? ___sys_sendmsg+0x803/0x920 [ 55.846279] ? copy_msghdr_from_user+0x430/0x430 [ 55.851119] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.856712] ? __handle_mm_fault+0x7d1/0x3f80 [ 55.861231] ? copy_page_range+0x2030/0x2030 [ 55.865639] ? __do_page_fault+0x676/0xe90 [ 55.869869] ? find_held_lock+0x35/0x130 [ 55.873995] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.879647] ? __fget_light+0x1a9/0x230 [ 55.883612] ? __fdget+0x1b/0x20 [ 55.887073] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.892755] ? __sys_sendmsg+0x105/0x1d0 [ 55.896817] ? __ia32_sys_shutdown+0x80/0x80 [ 55.901233] ? up_read+0x1a/0x110 [ 55.904685] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.909457] ? do_syscall_64+0x26/0x620 [ 55.913438] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.918907] ? do_syscall_64+0x26/0x620 [ 55.922883] ? __x64_sys_sendmsg+0x78/0xb0 [ 55.927147] ? do_syscall_64+0xfd/0x620 [ 55.931123] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.937099] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 55.945074] PGD 797d2067 P4D 797d2067 PUD 8e663067 PMD 0 [ 55.950724] Oops: 0010 [#1] PREEMPT SMP KASAN [ 55.955209] CPU: 1 PID: 8193 Comm: syz-executor565 Tainted: G W 4.19.97-syzkaller #0 [ 55.964400] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.973755] RIP: 0010: (null) [ 55.977644] Code: Bad RIP value. [ 55.980994] RSP: 0018:ffff88809662f140 EFLAGS: 00010246 [ 55.986355] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdc9f8 [ 55.993657] RDX: 1ffffffff139dd36 RSI: ffff88809662f180 RDI: ffff88809662f1d0 [ 56.000960] RBP: ffff88809662f268 R08: ffff88807a80a440 R09: ffff88809662f1d0 [ 56.008220] R10: ffffed1012cc5e3f R11: ffff88809662f1ff R12: ffff88808c874a80 [ 56.015520] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff89cee978 [ 56.022783] FS: 0000000002649880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 56.031001] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.036880] CR2: ffffffffffffffd6 CR3: 000000009f428000 CR4: 00000000001406e0 [ 56.044234] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.051527] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.058788] Call Trace: [ 56.061370] nfnetlink_parse_nat_setup+0x256/0x450 [ 56.066303] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 56.070475] ctnetlink_parse_nat_setup+0xc5/0x660 [ 56.075311] ctnetlink_create_conntrack+0x4ea/0x1300 [ 56.080417] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 56.085267] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 56.090375] ctnetlink_new_conntrack+0x527/0xe50 [ 56.095484] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 56.100841] ? find_held_lock+0x35/0x130 [ 56.104891] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 56.110084] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 56.115506] nfnetlink_rcv_msg+0xd0d/0xfcf [ 56.119774] ? nfnetlink_bind+0x2c0/0x2c0 [ 56.124073] ? avc_has_extended_perms+0x10f0/0x10f0 [ 56.129089] ? selinux_ipv4_output+0x50/0x50 [ 56.133504] ? mark_held_locks+0x100/0x100 [ 56.137741] netlink_rcv_skb+0x17d/0x460 [ 56.141795] ? nfnetlink_bind+0x2c0/0x2c0 [ 56.145941] ? netlink_ack+0xb30/0xb30 [ 56.149951] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.155480] ? ns_capable+0x23/0x30 [ 56.159103] ? __netlink_ns_capable+0x104/0x140 [ 56.163828] nfnetlink_rcv+0x1c0/0x460 [ 56.167718] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 56.172472] ? netlink_deliver_tap+0x254/0xc20 [ 56.177055] ? kasan_check_write+0x14/0x20 [ 56.181281] netlink_unicast+0x53a/0x730 [ 56.185360] ? netlink_attachskb+0x770/0x770 [ 56.189784] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.195388] netlink_sendmsg+0x8ae/0xd70 [ 56.199441] ? netlink_unicast+0x730/0x730 [ 56.203685] ? selinux_socket_sendmsg+0x36/0x40 [ 56.208387] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.213920] ? security_socket_sendmsg+0x8d/0xc0 [ 56.218669] ? netlink_unicast+0x730/0x730 [ 56.222906] sock_sendmsg+0xd7/0x130 [ 56.226661] ___sys_sendmsg+0x803/0x920 [ 56.230627] ? copy_msghdr_from_user+0x430/0x430 [ 56.235379] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.240953] ? __handle_mm_fault+0x7d1/0x3f80 [ 56.245444] ? copy_page_range+0x2030/0x2030 [ 56.249838] ? __do_page_fault+0x676/0xe90 [ 56.254071] ? find_held_lock+0x35/0x130 [ 56.258122] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 56.263657] ? __fget_light+0x1a9/0x230 [ 56.267626] ? __fdget+0x1b/0x20 [ 56.270984] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 56.276511] __sys_sendmsg+0x105/0x1d0 [ 56.280393] ? __ia32_sys_shutdown+0x80/0x80 [ 56.284785] ? up_read+0x1a/0x110 [ 56.288280] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 56.293030] ? do_syscall_64+0x26/0x620 [ 56.296992] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.302345] ? do_syscall_64+0x26/0x620 [ 56.306307] __x64_sys_sendmsg+0x78/0xb0 [ 56.310421] do_syscall_64+0xfd/0x620 [ 56.314224] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.319404] RIP: 0033:0x440289 [ 56.322585] 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 [ 56.341714] RSP: 002b:00007ffd08744018 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 56.349419] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440289 [ 56.356680] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 56.363941] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 56.371247] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b10 [ 56.378767] R13: 0000000000401ba0 R14: 0000000000000000 R15: 0000000000000000 [ 56.386028] Modules linked in: [ 56.389208] CR2: 0000000000000000 [ 56.393031] ---[ end trace d42b203c93c2487e ]--- [ 56.397803] RIP: 0010: (null) [ 56.401740] Code: Bad RIP value. [ 56.405096] RSP: 0018:ffff88809662f140 EFLAGS: 00010246 [ 56.410540] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdc9f8 [ 56.417839] RDX: 1ffffffff139dd36 RSI: ffff88809662f180 RDI: ffff88809662f1d0 [ 56.425098] RBP: ffff88809662f268 R08: ffff88807a80a440 R09: ffff88809662f1d0 [ 56.432421] R10: ffffed1012cc5e3f R11: ffff88809662f1ff R12: ffff88808c874a80 [ 56.439722] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff89cee978 [ 56.447042] FS: 0000000002649880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 56.455644] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.461571] CR2: ffffffffffffffd6 CR3: 000000009f428000 CR4: 00000000001406e0 [ 56.468889] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.476353] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.483740] Kernel panic - not syncing: Fatal exception [ 56.490689] Kernel Offset: disabled [ 56.494516] Rebooting in 86400 seconds..