Btrfs loaded, crc32c=crc32c-intel, assert=on, zoned=yes Key type big_key registered Key type encrypted registered AppArmor: AppArmor sha1 policy hashing enabled ima: No TPM chip found, activating TPM-bypass! Loading compiled-in module X.509 certificates Loaded X.509 cert 'Build time autogenerated kernel key: f850c787ad998c396ae089c083b940ff0a9abb77' ima: Allocated hash algorithm: sha256 ima: No architecture policies found evm: Initialising EVM extended attributes: evm: security.selinux (disabled) evm: security.SMACK64 (disabled) evm: security.SMACK64EXEC (disabled) evm: security.SMACK64TRANSMUTE (disabled) evm: security.SMACK64MMAP (disabled) evm: security.apparmor evm: security.ima evm: security.capability evm: HMAC attrs: 0x1 PM: Magic number: 13:439:442 media media6: hash matches printk: console [netcon0] enabled netconsole: network logging started gtp: GTP module loaded (pdp ctx size 104 bytes) rdma_rxe: loaded cfg80211: Loading compiled-in X.509 certificates for regulatory database cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' ALSA device list: #0: Dummy 1 #1: Loopback 1 #2: Virtual MIDI Card 1 md: Waiting for all devices to be available before autodetect md: If you don't use raid, use raid=noautodetect md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. EXT4-fs (sda1): mounted filesystem without journal. Opts: (null). Quota mode: none. VFS: Mounted root (ext4 filesystem) readonly on device 8:1. devtmpfs: mounted Freeing unused kernel image (initmem) memory: 4408K Write protecting the kernel read-only data: 169984k Freeing unused kernel image (text/rodata gap) memory: 2012K Freeing unused kernel image (rodata/data gap) memory: 1520K Run /sbin/init as init process systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN) systemd[1]: Detected virtualization kvm. systemd[1]: Detected architecture x86-64. systemd[1]: Set hostname to . ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 1 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 lib/refcount.c:25 Modules linked in: CPU: 1 PID: 1 Comm: systemd Not tainted 5.14.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:refcount_warn_saturate+0x169/0x1e0 lib/refcount.c:25 Code: 09 31 ff 89 de e8 27 12 9f fd 84 db 0f 85 36 ff ff ff e8 da 0b 9f fd 48 c7 c7 00 7b e3 89 c6 05 8f 8c 81 09 01 e8 68 c2 13 05 <0f> 0b e9 17 ff ff ff e8 bb 0b 9f fd 0f b6 1d 74 8c 81 09 31 ff 89 RSP: 0018:ffffc90000c66ab0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888140160000 RSI: ffffffff815d6a05 RDI: fffff5200018cd48 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815d083e R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000001 R14: 0000000000000000 R15: ffff888028f87e00 FS: 00007f5494e8a500(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005576d2d4e368 CR3: 00000000284a9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_add include/linux/refcount.h:199 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] fib_create_info+0x36af/0x4910 net/ipv4/fib_semantics.c:1554 fib_table_insert+0x1cd/0x1af0 net/ipv4/fib_trie.c:1224 fib_magic+0x455/0x540 net/ipv4/fib_frontend.c:1087 fib_add_ifaddr+0x16c/0x500 net/ipv4/fib_frontend.c:1109 fib_inetaddr_event+0x162/0x2a0 net/ipv4/fib_frontend.c:1420 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 blocking_notifier_call_chain kernel/notifier.c:337 [inline] blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:325 __inet_insert_ifa+0x919/0xc20 net/ipv4/devinet.c:553 inet_insert_ifa net/ipv4/devinet.c:560 [inline] inetdev_event+0x1243/0x15d0 net/ipv4/devinet.c:1570 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2123 call_netdevice_notifiers_extack net/core/dev.c:2135 [inline] call_netdevice_notifiers net/core/dev.c:2149 [inline] __dev_notify_flags+0x110/0x2b0 net/core/dev.c:8878 dev_change_flags+0x112/0x170 net/core/dev.c:8916 do_setlink+0x913/0x3910 net/core/rtnetlink.c:2710 rtnl_setlink+0x24d/0x3c0 net/core/rtnetlink.c:3003 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5563 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 __sys_sendto+0x21c/0x320 net/socket.c:2030 __do_sys_sendto net/socket.c:2042 [inline] __se_sys_sendto net/socket.c:2038 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2038 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f5493727693 Code: 79 20 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb cd 66 0f 1f 44 00 00 83 3d 39 bd 20 00 00 75 13 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 cb f7 ff ff 48 89 04 24 RSP: 002b:00007fffec1c0a58 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00005576d2d449a0 RCX: 00007f5493727693 RDX: 0000000000000020 RSI: 00005576d2d442b0 RDI: 0000000000000004 RBP: 00005576d2d44ab0 R08: 00007fffec1c0a60 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffec1c0ac4 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001