ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor3753909609

<...>
Warning: Permanently added '10.128.0.205' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor3753909609", ["ci2-android-6-1/syz-executor3753909609"], 0x7fffec246f60 /* 10 vars */) = 0
brk(NULL)                               = 0x55555a33f000
brk(0x55555a33fd40)                     = 0x55555a33fd40
arch_prctl(ARCH_SET_FS, 0x55555a33f3c0) = 0
set_tid_address(0x55555a33f690)         = 305
set_robust_list(0x55555a33f6a0, 24)     = 0
rseq({cpu_id_start=0, cpu_id=RSEQ_CPU_ID_UNINITIALIZED, rseq_cs=NULL, flags=0, node_id=0, mm_cid=0, slice_ctrl={request=0, granted=0, __reserved=0}, __reserved=0}, 32, 0, 0x53053053) = -1 ENOSYS (Function not implemented)
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlinkat(AT_FDCWD, "/proc/self/exe", "/root/ci2-android-6-1/syz-executor3753909609", 4096) = 44
getrandom("\x08\x91\x55\xb4\x18\x9a\x55\xb1", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55555a33fd40
brk(0x55555a360d40)                     = 0x55555a360d40
brk(0x55555a361000)                     = 0x55555a361000
mprotect(0x7fe36eed8000, 20480, PROT_READ) = 0
mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000
mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000
mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000
unshare(CLONE_NEWPID)                   = 0
rt_sigprocmask(SIG_BLOCK, ~[], [], 8)   = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555a33f690) = 306
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 306 attached
[pid   306] set_robust_list(0x55555a33f6a0, 24) = 0
[pid   306] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   306] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   306] getppid()                   = 0
[pid   306] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid   306] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid   306] unshare(CLONE_NEWNS)        = 0
[pid   306] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] unshare(CLONE_NEWIPC)       = -1 EINVAL (Invalid argument)
[pid   306] unshare(CLONE_NEWCGROUP)    = 0
[pid   306] unshare(CLONE_NEWUTS)       = 0
[pid   306] unshare(CLONE_SYSVSEM)      = 0
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   306] getpid()                    = 1
[pid   306] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid   306] capset({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid   306] unshare(CLONE_NEWNET)       = 0
[pid   306] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid   306] write(3, "0 65535", 7)      = 7
[pid   306] close(3)                    = 0
[pid   306] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid   306] write(3, "100000", 6)       = 6
[pid   306] close(3)                    = 0
[pid   306] mkdir("./syz-tmp", 0777)    = 0
[pid   306] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot", 0777) = 0
[pid   306] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid   306] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid   306] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid   306] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   306] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid   306] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   306] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   306] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid   306] mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL, MS_RDONLY|MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   306] mkdir("./syz-tmp/pivot", 0777) = 0
[pid   306] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid   306] chdir("/")                  = 0
[pid   306] umount2("./pivot", MNT_DETACH) = 0
[pid   306] chroot("./newroot")         = 0
[pid   306] chdir("/")                  = 0
[pid   306] mkdir("/dev/gadgetfs", 0777) = 0
[   21.020926][   T28] audit: type=1400 audit(1792934983.286:64): avc:  denied  { execmem } for  pid=305 comm="syz-executor375" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   21.041102][   T28] audit: type=1400 audit(1792934983.286:65): avc:  denied  { mounton } for  pid=306 comm="syz-executor375" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1
[pid   306] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = -1 ENODEV (No such device)
[pid   306] mkdir("/dev/binderfs", 0777) = 0
[pid   306] mount("binder", "/dev/binderfs", "binder", 0, "stats=global") = 0
[pid   306] symlink("/dev/binderfs", "./binderfs") = 0
[pid   306] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid   306] write(1, "executing program\n", 18) = 18
executing program
[pid   306] socket(AF_PPPOX, SOCK_STREAM, 1) = 3
[pid   306] socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP) = 4
[pid   306] connect(3, {sa_family=AF_PPPOX, sa_data="\x01\x00\x00\x00\x03\x00\x00\x00\x04\x00\x00\x00\x02\x00\x4e\x23\xac\x1e\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00"}, 46) = 0
[pid   306] ioctl(3, PPPIOCSFLAGS, 0)   = -1 ENOSYS (Function not implemented)
[pid   306] exit_group(1)               = ?
[   21.063090][   T28] audit: type=1400 audit(1792934983.306:66): avc:  denied  { mounton } for  pid=306 comm="syz-executor375" path="/root/syz-tmp" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[   21.064645][  T306] request_module fs-gadgetfs succeeded, but still no fs?
[   21.086270][   T28] audit: type=1400 audit(1792934983.306:67): avc:  denied  { mount } for  pid=306 comm="syz-executor375" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1
[   21.115897][   T28] audit: type=1400 audit(1792934983.306:68): avc:  denied  { mounton } for  pid=306 comm="syz-executor375" path="/root/syz-tmp/newroot/dev" dev="tmpfs" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_tmpfs_t tclass=dir permissive=1
[   21.139885][   T28] audit: type=1400 audit(1792934983.306:69): avc:  denied  { mount } for  pid=306 comm="syz-executor375" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   21.161833][   T28] audit: type=1400 audit(1792934983.316:70): avc:  denied  { mounton } for  pid=306 comm="syz-executor375" path="/root/syz-tmp/newroot/sys/kernel/debug" dev="debugfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:debugfs_t tclass=dir permissive=1
[   21.187014][   T28] audit: type=1400 audit(1792934983.316:71): avc:  denied  { mounton } for  pid=306 comm="syz-executor375" path="/root/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=15587 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   21.213077][   T28] audit: type=1400 audit(1792934983.316:72): avc:  denied  { unmount } for  pid=306 comm="syz-executor375" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   21.232694][   T28] audit: type=1400 audit(1792934983.326:73): avc:  denied  { mounton } for  pid=306 comm="syz-executor375" path="/dev/gadgetfs" dev="devtmpfs" ino=570 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
[   21.232766][  T306] ==================================================================
[   21.263546][  T306] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0
[   21.271635][  T306] Read of size 4 at addr ffff888123fab000 by task syz-executor375/306
[   21.279760][  T306] 
[   21.282059][  T306] CPU: 0 PID: 306 Comm: syz-executor375 Not tainted syzkaller #0
[   21.289745][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   21.299780][  T306] Call Trace:
[   21.303034][  T306]  <TASK>
[   21.305944][  T306]  __dump_stack+0x21/0x24
[   21.310265][  T306]  dump_stack_lvl+0x110/0x170
[   21.314916][  T306]  ? __cfi_dump_stack_lvl+0x8/0x8
[   21.319918][  T306]  ? _raw_spin_lock_bh+0x94/0xf0
[   21.324830][  T306]  ? pppol2tp_sock_to_session+0x1a0/0x1b0
[   21.330528][  T306]  print_address_description+0x71/0x200
[   21.336050][  T306]  print_report+0x4a/0x60
[   21.340353][  T306]  kasan_report+0x122/0x150
[   21.344835][  T306]  ? pppol2tp_sock_to_session+0x1a0/0x1b0
[   21.350549][  T306]  __asan_report_load4_noabort+0x14/0x20
[   21.356169][  T306]  pppol2tp_sock_to_session+0x1a0/0x1b0
[   21.361697][  T306]  pppol2tp_release+0x150/0x2b0
[   21.366537][  T306]  sock_close+0xc9/0x220
[   21.370753][  T306]  ? __cfi_sock_close+0x10/0x10
[   21.375577][  T306]  __fput+0x1fd/0x8f0
[   21.379535][  T306]  ____fput+0x15/0x20
[   21.383489][  T306]  task_work_run+0x1e1/0x250
[   21.388053][  T306]  ? __cfi_task_work_run+0x10/0x10
[   21.393147][  T306]  ? free_nsproxy+0x21f/0x270
[   21.397809][  T306]  do_exit+0xb0d/0x29f0
[   21.401952][  T306]  ? ptrace_stop+0x6dc/0x8e0
[   21.406521][  T306]  ? __cfi_do_exit+0x10/0x10
[   21.411095][  T306]  ? __kasan_check_write+0x14/0x20
[   21.416193][  T306]  ? _raw_spin_lock_irq+0x95/0xf0
[   21.421202][  T306]  ? __cfi__raw_spin_lock_irq+0x10/0x10
[   21.426725][  T306]  ? zap_other_threads+0x321/0x3a0
[   21.431820][  T306]  do_group_exit+0x21b/0x2e0
[   21.436395][  T306]  __x64_sys_exit_group+0x3f/0x40
[   21.441404][  T306]  x64_sys_call+0x7b4/0x9a0
[   21.445889][  T306]  do_syscall_64+0x4c/0xa0
[   21.450284][  T306]  ? clear_bhb_loop+0x30/0x80
[   21.454941][  T306]  ? clear_bhb_loop+0x30/0x80
[   21.459597][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   21.465470][  T306] RIP: 0033:0x7fe36ee43c45
[   21.469879][  T306] Code: Unable to access opcode bytes at 0x7fe36ee43c1b.
[   21.476870][  T306] RSP: 002b:00007ffd4eafc7b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
[   21.485266][  T306] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fe36ee43c45
[   21.493218][  T306] RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000001
[   21.501167][  T306] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000006
[   21.509118][  T306] R10: 0000000000000006 R11: 0000000000000206 R12: 0000000000000001
[   21.517066][  T306] R13: 00007fe36eedd110 R14: 00007fe36eedf3a8 R15: 00007fe36eedf3c0
[   21.525022][  T306]  </TASK>
[   21.528020][  T306] 
[   21.530322][  T306] Allocated by task 306:
[   21.534538][  T306]  kasan_set_track+0x4b/0x70
[   21.539124][  T306]  kasan_save_alloc_info+0x1f/0x30
[   21.544242][  T306]  __kasan_kmalloc+0x95/0xb0
[   21.548818][  T306]  __kmalloc+0xb4/0x1e0
[   21.552959][  T306]  l2tp_session_create+0x38/0xbd0
[   21.557970][  T306]  pppol2tp_connect+0xbf5/0x1640
[   21.562895][  T306]  __sys_connect+0x3da/0x460
[   21.567472][  T306]  __x64_sys_connect+0x7a/0x90
[   21.572218][  T306]  x64_sys_call+0x88d/0x9a0
[   21.576706][  T306]  do_syscall_64+0x4c/0xa0
[   21.581103][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   21.586980][  T306] 
[   21.589287][  T306] Freed by task 8:
[   21.592988][  T306]  kasan_set_track+0x4b/0x70
[   21.597564][  T306]  kasan_save_free_info+0x2b/0x40
[   21.602568][  T306]  ____kasan_slab_free+0x132/0x180
[   21.607659][  T306]  __kasan_slab_free+0x11/0x20
[   21.612403][  T306]  slab_free_freelist_hook+0xc2/0x190
[   21.617769][  T306]  __kmem_cache_free+0xb7/0x1b0
[   21.622607][  T306]  kfree+0x6f/0xf0
[   21.626311][  T306]  l2tp_session_put+0xaf/0x1a0
[   21.631060][  T306]  l2tp_session_delete+0x3df/0x4d0
[   21.636156][  T306]  l2tp_tunnel_del_work+0x199/0x410
[   21.641338][  T306]  process_one_work+0x717/0xc30
[   21.646172][  T306]  worker_thread+0xa4d/0x11d0
[   21.650825][  T306]  kthread+0x281/0x320
[   21.654873][  T306]  ret_from_fork+0x1f/0x30
[   21.659272][  T306] 
[   21.661575][  T306] The buggy address belongs to the object at ffff888123fab000
[   21.661575][  T306]  which belongs to the cache kmalloc-512 of size 512
[   21.675604][  T306] The buggy address is located 0 bytes inside of
[   21.675604][  T306]  512-byte region [ffff888123fab000, ffff888123fab200)
[   21.688681][  T306] 
[   21.690986][  T306] The buggy address belongs to the physical page:
[   21.697376][  T306] page:ffffea00048fea00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x123fa8
[   21.707604][  T306] head:ffffea00048fea00 order:2 compound_mapcount:0 compound_pincount:0
[   21.715903][  T306] flags: 0x4000000000010200(slab|head|zone=1)
[   21.721957][  T306] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
[   21.730529][  T306] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[   21.739092][  T306] page dumped because: kasan: bad access detected
[   21.745491][  T306] page_owner tracks the page as allocated
[   21.751191][  T306] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 306, tgid 306 (syz-executor375), ts 21041885233, free_ts 21041077511
[   21.772617][  T306]  post_alloc_hook+0x1f5/0x210
[   21.777380][  T306]  prep_new_page+0x1c/0x110
[   21.781867][  T306]  get_page_from_freelist+0x2ca9/0x2d20
[   21.787402][  T306]  __alloc_pages+0x1fa/0x610
[   21.791973][  T306]  alloc_slab_page+0x6e/0xf0
[   21.796541][  T306]  new_slab+0x98/0x3e0
[   21.800587][  T306]  ___slab_alloc+0x70f/0xb70
[   21.805165][  T306]  __slab_alloc+0x5e/0xa0
[   21.809484][  T306]  __kmem_cache_alloc_node+0x204/0x2d0
[   21.814924][  T306]  kmalloc_trace+0x29/0xb0
[   21.819318][  T306]  inetdev_init+0x81/0x510
[   21.823718][  T306]  inetdev_event+0x1f4/0x10a0
[   21.828379][  T306]  raw_notifier_call_chain+0xa1/0x110
[   21.833752][  T306]  call_netdevice_notifiers+0x119/0x190
[   21.839287][  T306]  register_netdevice+0x1186/0x1550
[   21.844483][  T306]  register_netdev+0x3e/0x50
[   21.849052][  T306] page last free stack trace:
[   21.853699][  T306]  free_unref_page_prepare+0x81b/0x820
[   21.859144][  T306]  free_unref_page+0x93/0x530
[   21.863803][  T306]  __free_pages+0x67/0x100
[   21.868203][  T306]  free_pages+0x82/0x90
[   21.872342][  T306]  __stack_depot_save+0x45f/0x490
[   21.877351][  T306]  kasan_set_track+0x60/0x70
[   21.881917][  T306]  kasan_save_alloc_info+0x1f/0x30
[   21.887008][  T306]  __kasan_kmalloc+0x95/0xb0
[   21.891577][  T306]  kmalloc_trace+0x40/0xb0
[   21.895973][  T306]  __hw_addr_add_ex+0x1f4/0x6f0
[   21.900807][  T306]  dev_addr_init+0x143/0x220
[   21.905375][  T306]  alloc_netdev_mqs+0x287/0xfb0
[   21.910204][  T306]  ip6gre_init_net+0xff/0x3b0
[   21.914864][  T306]  ops_init+0x2ce/0x470
[   21.919000][  T306]  setup_net+0x4b4/0xcd0
[   21.923218][  T306]  copy_net_ns+0x355/0x5c0
[   21.927609][  T306] 
[   21.929912][  T306] Memory state around the buggy address:
[   21.935515][  T306]  ffff888123faaf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   21.943561][  T306]  ffff888123faaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   21.951598][  T306] >ffff888123fab000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   21.959639][  T306]                    ^
[   21.963681][  T306]  ffff888123fab080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   21.971716][  T306]  ffff888123fab100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   21.979751][  T306] ==================================================================
[   21.987946][  T306] Disabling lock debugging due to kernel taint
[   21.994222][  T306] ------------[ cut here ]------------
[   21.999895][  T306] WARNING: CPU: 0 PID: 306 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0
[   22.009933][  T306] Modules linked in:
[   22.013834][  T306] CPU: 0 PID: 306 Comm: syz-executor375 Tainted: G    B              syzkaller #0
[   22.023079][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
[   22.033173][  T306] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0
[   22.039553][  T306] Code: 5d c3 e8 2c c0 d4 fc be 02 00 00 00 eb 0a e8 20 c0 d4 fc be 01 00 00 00 4c 89 f7 e8 23 c5 cc fd e9 0f ff ff ff e8 09 c0 d4 fc <0f> 0b 48 89 df e8 ff 00 00 00 eb bd e8 f8 bf d4 fc 4c 89 f7 be 03
[   22.059222][  T306] RSP: 0018:ffffc90000e07b30 EFLAGS: 00010293
[   22.065290][  T306] RAX: ffffffff849cb317 RBX: ffff888109ae7000 RCX: ffff88810fa4d100
[   22.073315][  T306] RDX: 0000000000000000 RSI: 000000000b608000 RDI: 000000000c04eb7d
[   22.081324][  T306] RBP: ffffc90000e07b50 R08: ffffffff87b777e7 R09: 1ffffffff0f6eefc
[   22.089353][  T306] R10: dffffc0000000000 R11: fffffbfff0f6eefd R12: dffffc0000000000
[   22.097311][  T306] R13: dffffc0000000000 R14: 000000000b608000 R15: ffff888123fab000
[   22.105277][  T306] FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
[   22.114212][  T306] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   22.120794][  T306] CR2: 00007fe36eeacb3c CR3: 000000000700f000 CR4: 00000000003506b0
[   22.128767][  T306] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   22.136716][  T306] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   22.144701][  T306] Call Trace:
[   22.147976][  T306]  <TASK>
[   22.150882][  T306]  pppol2tp_release+0x150/0x2b0
[   22.155712][  T306]  sock_close+0xc9/0x220
[   22.159947][  T306]  ? __cfi_sock_close+0x10/0x10
[   22.164790][  T306]  __fput+0x1fd/0x8f0
[   22.168770][  T306]  ____fput+0x15/0x20
[   22.172767][  T306]  task_work_run+0x1e1/0x250
[   22.177344][  T306]  ? __cfi_task_work_run+0x10/0x10
[   22.182451][  T306]  ? free_nsproxy+0x21f/0x270
[   22.187121][  T306]  do_exit+0xb0d/0x29f0
[   22.191271][  T306]  ? ptrace_stop+0x6dc/0x8e0
[   22.195849][  T306]  ? __cfi_do_exit+0x10/0x10
[   22.200441][  T306]  ? __kasan_check_write+0x14/0x20
[   22.205558][  T306]  ? _raw_spin_lock_irq+0x95/0xf0
[   22.210577][  T306]  ? __cfi__raw_spin_lock_irq+0x10/0x10
[   22.216119][  T306]  ? zap_other_threads+0x321/0x3a0
[   22.221228][  T306]  do_group_exit+0x21b/0x2e0
[   22.225809][  T306]  __x64_sys_exit_group+0x3f/0x40
[   22.230829][  T306]  x64_sys_call+0x7b4/0x9a0
[   22.235322][  T306]  do_syscall_64+0x4c/0xa0
[   22.239733][  T306]  ? clear_bhb_loop+0x30/0x80
[   22.244401][  T306]  ? clear_bhb_loop+0x30/0x80
[   22.249072][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   22.254954][  T306] RIP: 0033:0x7fe36ee43c45
[   22.259368][  T306] Code: Unable to access opcode bytes at 0x7fe36ee43c1b.
[   22.266368][  T306] RSP: 002b:00007ffd4eafc7b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
[pid   306] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=306, si_uid=0, si_status=1, si_utime=0, si_stime=47 /* 0.47 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   22.274773][  T30