./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor983910217 <...> [ 34.627222][ T3212] 8021q: adding VLAN 0 to HW filter on device bond0 [ 34.644897][ T3212] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller syzkaller login: [ 42.912479][ T26] kauditd_printk_skb: 37 callbacks suppressed [ 42.912496][ T26] audit: type=1400 audit(1668944788.465:73): avc: denied { transition } for pid=3420 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 42.943994][ T26] audit: type=1400 audit(1668944788.495:74): avc: denied { write } for pid=3420 comm="sh" path="pipe:[28709]" dev="pipefs" ino=28709 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts. execve("./syz-executor983910217", ["./syz-executor983910217"], 0x7ffe71163910 /* 10 vars */) = 0 brk(NULL) = 0x5555560cc000 brk(0x5555560ccc40) = 0x5555560ccc40 arch_prctl(ARCH_SET_FS, 0x5555560cc300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor983910217", 4096) = 27 brk(0x5555560edc40) = 0x5555560edc40 brk(0x5555560ee000) = 0x5555560ee000 mprotect(0x7f3f882b1000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 3 socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 4 sendto(4, [{nlmsg_len=32, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x03\x00\x00\x00\x09\x00\x02\x00\x6c\x32\x74\x70\x00\x00\x00\x00"], 32, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 32 recvfrom(4, [{nlmsg_len=276, nlmsg_type=nlctrl, nlmsg_flags=0, nlmsg_seq=0, nlmsg_pid=3636}, "\x01\x02\x00\x00\x09\x00\x02\x00\x6c\x32\x74\x70\x00\x00\x00\x00\x06\x00\x01\x00\x30\x00\x00\x00\x08\x00\x03\x00\x01\x00\x00\x00\x08\x00\x04\x00\x00\x00\x00\x00\x08\x00\x05\x00\x23\x00\x00\x00\xb8\x00\x06\x00\x14\x00\x01\x00\x08\x00\x01\x00\x00\x00\x00\x00\x08\x00\x02\x00\x0a\x00\x00\x00\x14\x00\x02\x00\x08\x00\x01\x00\x01\x00\x00\x00\x08\x00\x02\x00\x1a\x00\x00\x00\x14\x00\x03\x00\x08\x00\x01\x00"...], 4096, 0, NULL, NULL) = 276 recvfrom(4, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=3636}, {error=0, msg={nlmsg_len=32, nlmsg_type=nlctrl, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 close(4) = 0 [ 55.175723][ T26] audit: type=1400 audit(1668944800.735:75): avc: denied { execmem } for pid=3636 comm="syz-executor983" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 55.195050][ T3636] BUG: sleeping function called from invalid context at include/linux/percpu-rwsem.h:49 [ 55.195266][ T26] audit: type=1400 audit(1668944800.735:76): avc: denied { create } for pid=3636 comm="syz-executor983" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 55.205013][ T3636] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3636, name: syz-executor983 [ 55.225718][ T26] audit: type=1400 audit(1668944800.745:77): avc: denied { create } for pid=3633 comm="strace-static-x" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_tcpdiag_socket permissive=1 [ 55.235162][ T3636] preempt_count: 1, expected: 0 [ 55.235177][ T3636] RCU nest depth: 0, expected: 0 [ 55.235190][ T3636] 3 locks held by syz-executor983/3636: [ 55.235207][ T3636] #0: ffffffff8df620f0 [ 55.256408][ T26] audit: type=1400 audit(1668944800.745:78): avc: denied { write } for pid=3633 comm="strace-static-x" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_tcpdiag_socket permissive=1 [ 55.260731][ T3636] (cb_lock [ 55.265939][ T26] audit: type=1400 audit(1668944800.745:79): avc: denied { nlmsg_read } for pid=3633 comm="strace-static-x" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_tcpdiag_socket permissive=1 [ 55.271318][ T3636] ){++++}-{3:3} [ 55.275627][ T26] audit: type=1400 audit(1668944800.745:80): avc: denied { read } for pid=3633 comm="strace-static-x" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_tcpdiag_socket permissive=1 [ 55.296070][ T3636] , at: genl_rcv+0x19/0x40 [ 55.299238][ T26] audit: type=1400 audit(1668944800.745:81): avc: denied { write } for pid=3636 comm="syz-executor983" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 55.320232][ T3636] #1: ffffffff8df621a8 [ 55.345165][ T26] audit: type=1400 audit(1668944800.745:82): avc: denied { read } for pid=3636 comm="syz-executor983" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 55.348620][ T3636] (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x50d/0x780 [ 55.401205][ T3636] #2: ffff88807970bbf8 (k-clock-AF_INET){+++.}-{2:2}, at: l2tp_tunnel_register+0x126/0x1210 [ 55.411439][ T3636] Preemption disabled at: [ 55.411451][ T3636] [<0000000000000000>] 0x0 [ 55.420430][ T3636] CPU: 1 PID: 3636 Comm: syz-executor983 Not tainted 6.1.0-rc5-syzkaller-00320-gb6e7fdfd6f6a #0 [ 55.430826][ T3636] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 55.440865][ T3636] Call Trace: [ 55.444130][ T3636] [ 55.447050][ T3636] dump_stack_lvl+0xd1/0x138 [ 55.451637][ T3636] __might_resched.cold+0x222/0x26b [ 55.456831][ T3636] cpus_read_lock+0x1b/0x140 [ 55.461413][ T3636] static_key_slow_inc+0x12/0x20 [ 55.466339][ T3636] setup_udp_tunnel_sock+0x3e1/0x550 [ 55.471619][ T3636] l2tp_tunnel_register+0xc51/0x1210 [ 55.476903][ T3636] ? l2tp_tunnel_del_work+0x780/0x780 [ 55.482271][ T3636] ? debug_object_free+0x360/0x360 [ 55.487380][ T3636] ? l2tp_recv_common+0x3100/0x3100 [ 55.492572][ T3636] ? l2tp_tunnel_delete+0x50/0x50 [ 55.497594][ T3636] ? l2tp_tunnel_create+0x2bf/0x4b0 [ 55.502786][ T3636] ? l2tp_tunnel_create+0x3c6/0x4b0 [ 55.507977][ T3636] l2tp_nl_cmd_tunnel_create+0x3d6/0x8b0 [ 55.513608][ T3636] ? l2tp_tunnel_notify.constprop.0+0x160/0x160 [ 55.519863][ T3636] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x1b7/0x290 [ 55.527238][ T3636] ? genl_family_rcv_msg_attrs_parse.constprop.0+0xaf/0x290 [ 55.534544][ T3636] genl_family_rcv_msg_doit+0x228/0x320 [ 55.540112][ T3636] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 55.547511][ T3636] ? mutex_lock_io_nested+0x11a0/0x11a0 [ 55.553076][ T3636] ? cap_capable+0x1e4/0x270 [ 55.557687][ T3636] ? ns_capable+0xdd/0x100 [ 55.562117][ T3636] genl_rcv_msg+0x445/0x780 [ 55.566646][ T3636] ? genl_start+0x670/0x670 [ 55.571164][ T3636] ? l2tp_tunnel_notify.constprop.0+0x160/0x160 [ 55.577417][ T3636] ? lock_release+0x810/0x810 [ 55.582118][ T3636] netlink_rcv_skb+0x157/0x430 [ 55.586896][ T3636] ? genl_start+0x670/0x670 [ 55.591415][ T3636] ? netlink_ack+0xd60/0xd60 [ 55.596021][ T3636] ? netlink_deliver_tap+0x1b1/0xc50 [ 55.601320][ T3636] genl_rcv+0x28/0x40 [ 55.605316][ T3636] netlink_unicast+0x547/0x7f0 [ 55.610097][ T3636] ? netlink_attachskb+0x890/0x890 [ 55.615226][ T3636] netlink_sendmsg+0x91b/0xe10 [ 55.620006][ T3636] ? netlink_unicast+0x7f0/0x7f0 [ 55.624962][ T3636] ? netlink_unicast+0x7f0/0x7f0 [ 55.629914][ T3636] sock_sendmsg+0xd3/0x120 [ 55.634347][ T3636] ____sys_sendmsg+0x712/0x8c0 [ 55.639127][ T3636] ? copy_msghdr_from_user+0xfc/0x150 [ 55.644521][ T3636] ? kernel_sendmsg+0x50/0x50 [ 55.649213][ T3636] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 55.655219][ T3636] ___sys_sendmsg+0x110/0x1b0 [ 55.659914][ T3636] ? do_recvmmsg+0x6e0/0x6e0 [ 55.664523][ T3636] ? lock_release+0x810/0x810 [ 55.669223][ T3636] ? ptrace_stop.part.0+0x49a/0x8c0 [ 55.674459][ T3636] ? do_raw_spin_lock+0x124/0x2b0 [ 55.679527][ T3636] ? rwlock_bug.part.0+0x90/0x90 [ 55.684493][ T3636] ? _raw_spin_lock_irq+0x45/0x50 [ 55.689555][ T3636] ? __fget_light+0x20a/0x270 [ 55.694260][ T3636] __sys_sendmsg+0xf7/0x1c0 [ 55.698788][ T3636] ? __sys_sendmsg_sock+0x40/0x40 [ 55.703831][ T3636] ? lock_downgrade+0x6e0/0x6e0 [ 55.708707][ T3636] ? lockdep_hardirqs_on+0x7d/0x100 [ 55.713925][ T3636] ? _raw_spin_unlock_irq+0x2e/0x50 [ 55.719146][ T3636] ? ptrace_notify+0xfe/0x140 [ 55.723849][ T3636] do_syscall_64+0x39/0xb0 [ 55.728279][ T3636] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 55.734209][ T3636] RIP: 0033:0x7f3f88244ba9 [ 55.738633][ T3636] Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 55.758251][ T3636] RSP: 002b:00007ffd52fcc128 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.766674][ T3636] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3f88244ba9 sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x3c\x00\x00\x00\x30\x00\x23\x09\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x05\x00\x07\x00\x00\x00\x00\x00\x08\x00\x09\x00\x00\x00\x00\x00\x06\x00\x02\x00\x00\x00\x00\x00\x08\x00\x0a\x00\x00\x00\x00\x00\x08\x00\x17\x00\xff\xff\xff\xff", iov_len=60}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 60 exit_group(0) = ? +++ exited with 0 +++ [ 55.774653][ T3636] RDX: 0000000000000000 R