ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor1327888067

<...>
Warning: Permanently added '10.128.0.39' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor1327888067", ["ci2-android-6-1/syz-executor1327888067"], 0x7ffdf09146b0 /* 10 vars */) = 0
brk(NULL)                               = 0x555590028000
brk(0x555590028d40)                     = 0x555590028d40
arch_prctl(ARCH_SET_FS, 0x5555900283c0) = 0
set_tid_address(0x555590028690)         = 305
set_robust_list(0x5555900286a0, 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-executor1327888067", 4096) = 44
getrandom("\x4d\xf7\xe8\x00\x8e\xc0\x25\xef", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555590028d40
brk(0x555590049d40)                     = 0x555590049d40
brk(0x55559004a000)                     = 0x55559004a000
mprotect(0x7f08a6a12000, 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=0x555590028690) = 306
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 306 attached
[pid   306] set_robust_list(0x5555900286a0, 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
[   34.220089][   T28] audit: type=1400 audit(1785816748.599:64): avc:  denied  { execmem } for  pid=305 comm="syz-executor132" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   34.240146][   T28] audit: type=1400 audit(1785816748.609:65): avc:  denied  { mounton } for  pid=306 comm="syz-executor132" 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, NULL) = 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\x00\x00\xac\x14\x14\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"}, 46) = 0
[pid   306] ioctl(3, SIOCGIFINDEX, NULL) = -1 EFAULT (Bad address)
[   34.261953][   T28] audit: type=1400 audit(1785816748.619:66): avc:  denied  { mounton } for  pid=306 comm="syz-executor132" 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
[   34.263752][  T306] request_module fs-gadgetfs succeeded, but still no fs?
[   34.285208][   T28] audit: type=1400 audit(1785816748.619:67): avc:  denied  { mount } for  pid=306 comm="syz-executor132" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1
[   34.314949][  T306] ==================================================================
[   34.315265][   T28] audit: type=1400 audit(1785816748.619:68): avc:  denied  { mounton } for  pid=306 comm="syz-executor132" 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
[   34.323022][  T306] BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0
[   34.347048][   T28] audit: type=1400 audit(1785816748.629:69): avc:  denied  { mount } for  pid=306 comm="syz-executor132" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   34.353548][  T306] Write of size 8 at addr ffff888122c04550 by task syz-executor132/306
[   34.353563][  T306] 
[   34.353581][  T306] CPU: 0 PID: 306 Comm: syz-executor132 Not tainted syzkaller #0
[   34.375673][   T28] audit: type=1400 audit(1785816748.629:70): avc:  denied  { mounton } for  pid=306 comm="syz-executor132" path="/root/syz-tmp/newroot/selinux" dev="tmpfs" ino=5 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_tmpfs_t tclass=dir permissive=1
[   34.383634][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   34.383655][  T306] Call Trace:
[   34.383660][  T306]  <TASK>
[   34.383665][  T306]  __dump_stack+0x21/0x24
[   34.386270][   T28] audit: type=1400 audit(1785816748.629:71): avc:  denied  { mounton } for  pid=306 comm="syz-executor132" 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
[   34.393705][  T306]  dump_stack_lvl+0x110/0x170
[   34.393726][  T306]  ? __cfi_dump_stack_lvl+0x8/0x8
[   34.418021][   T28] audit: type=1400 audit(1785816748.629:72): avc:  denied  { mounton } for  pid=306 comm="syz-executor132" path="/root/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=15408 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   34.427865][  T306]  ? mutex_lock+0x86/0x1b0
[   34.427891][  T306]  print_address_description+0x71/0x200
[   34.431313][   T28] audit: type=1400 audit(1785816748.629:73): avc:  denied  { unmount } for  pid=306 comm="syz-executor132" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   34.434063][  T306]  print_report+0x4a/0x60
[   34.532879][  T306]  kasan_report+0x122/0x150
[   34.537364][  T306]  ? mutex_lock+0x86/0x1b0
[   34.541761][  T306]  kasan_check_range+0x249/0x2a0
[   34.546675][  T306]  __kasan_check_write+0x14/0x20
[   34.551591][  T306]  mutex_lock+0x86/0x1b0
[   34.555810][  T306]  ? __cfi_mutex_lock+0x10/0x10
[   34.560633][  T306]  ? kfree+0x6f/0xf0
[   34.564503][  T306]  ? l2tp_session_put+0xaf/0x1a0
[   34.569413][  T306]  ? l2tp_session_delete+0x3df/0x4d0
[   34.574672][  T306]  pppol2tp_release+0x178/0x2b0
[   34.579498][  T306]  sock_close+0xc9/0x220
[   34.583719][  T306]  ? __cfi_sock_close+0x10/0x10
[   34.588557][  T306]  __fput+0x1fd/0x8f0
[   34.592517][  T306]  ____fput+0x15/0x20
[   34.596487][  T306]  task_work_run+0x1e1/0x250
[   34.601076][  T306]  ? __cfi_task_work_run+0x10/0x10
[   34.606180][  T306]  ptrace_notify+0x23f/0x270
[   34.610754][  T306]  ? __cfi_task_work_add+0x10/0x10
[   34.615852][  T306]  ? __cfi_ptrace_notify+0x10/0x10
[   34.620946][  T306]  ? fput+0x15b/0x1a0
[   34.624911][  T306]  ? filp_close+0x111/0x160
[   34.629390][  T306]  syscall_exit_work+0x84/0x140
[   34.634233][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   34.640367][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   34.645719][  T306]  do_syscall_64+0x58/0xa0
[   34.650110][  T306]  ? clear_bhb_loop+0x30/0x80
[   34.654777][  T306]  ? clear_bhb_loop+0x30/0x80
[   34.659431][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   34.665303][  T306] RIP: 0033:0x7f08a6991557
[   34.669705][  T306] Code: 48 89 fa 4c 89 df e8 48 1f 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
[   34.689283][  T306] RSP: 002b:00007ffc77934100 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[   34.697687][  T306] RAX: 0000000000000000 RBX: 00005555900283c0 RCX: 00007f08a6991557
[   34.705635][  T306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   34.713580][  T306] RBP: 00007f08a69e7126 R08: 0000000000000000 R09: 0000000000000000
[   34.721524][  T306] R10: 0000000000000000 R11: 0000000000000202 R12: 00007f08a69e8df0
[   34.729472][  T306] R13: 00007f08a69e708e R14: 00007f08a6a12bc0 R15: 0000000000000002
[   34.737422][  T306]  </TASK>
[   34.740419][  T306] 
[   34.742719][  T306] Allocated by task 306:
[   34.746936][  T306]  kasan_set_track+0x4b/0x70
[   34.751503][  T306]  kasan_save_alloc_info+0x1f/0x30
[   34.756591][  T306]  __kasan_kmalloc+0x95/0xb0
[   34.761158][  T306]  __kmalloc+0xb4/0x1e0
[   34.765290][  T306]  l2tp_session_create+0x38/0xbd0
[   34.770290][  T306]  pppol2tp_connect+0xbf5/0x1640
[   34.775202][  T306]  __sys_connect+0x3da/0x460
[   34.779766][  T306]  __x64_sys_connect+0x7a/0x90
[   34.784509][  T306]  x64_sys_call+0x88d/0x9a0
[   34.788989][  T306]  do_syscall_64+0x4c/0xa0
[   34.793383][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   34.799267][  T306] 
[   34.801566][  T306] Freed by task 306:
[   34.805431][  T306]  kasan_set_track+0x4b/0x70
[   34.809998][  T306]  kasan_save_free_info+0x2b/0x40
[   34.814992][  T306]  ____kasan_slab_free+0x132/0x180
[   34.820079][  T306]  __kasan_slab_free+0x11/0x20
[   34.824839][  T306]  slab_free_freelist_hook+0xc2/0x190
[   34.830197][  T306]  __kmem_cache_free+0xb7/0x1b0
[   34.835031][  T306]  kfree+0x6f/0xf0
[   34.838736][  T306]  l2tp_session_put+0xaf/0x1a0
[   34.843475][  T306]  l2tp_session_delete+0x3df/0x4d0
[   34.848571][  T306]  pppol2tp_release+0x169/0x2b0
[   34.853406][  T306]  sock_close+0xc9/0x220
[   34.857627][  T306]  __fput+0x1fd/0x8f0
[   34.861583][  T306]  ____fput+0x15/0x20
[   34.865548][  T306]  task_work_run+0x1e1/0x250
[   34.870114][  T306]  ptrace_notify+0x23f/0x270
[   34.874680][  T306]  syscall_exit_work+0x84/0x140
[   34.879531][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   34.885682][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   34.891035][  T306]  do_syscall_64+0x58/0xa0
[   34.895441][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   34.901323][  T306] 
[   34.903632][  T306] The buggy address belongs to the object at ffff888122c04400
[   34.903632][  T306]  which belongs to the cache kmalloc-512 of size 512
[   34.917680][  T306] The buggy address is located 336 bytes inside of
[   34.917680][  T306]  512-byte region [ffff888122c04400, ffff888122c04600)
[   34.930952][  T306] 
[   34.933260][  T306] The buggy address belongs to the physical page:
[   34.939652][  T306] page:ffffea00048b0100 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x122c04
[   34.949871][  T306] head:ffffea00048b0100 order:2 compound_mapcount:0 compound_pincount:0
[   34.958171][  T306] flags: 0x4000000000010200(slab|head|zone=1)
[   34.964224][  T306] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
[   34.972781][  T306] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[   34.981332][  T306] page dumped because: kasan: bad access detected
[   34.987718][  T306] page_owner tracks the page as allocated
[   34.993412][  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-executor132), ts 34236131371, free_ts 34236046133
[   35.014830][  T306]  post_alloc_hook+0x1f5/0x210
[   35.019578][  T306]  prep_new_page+0x1c/0x110
[   35.024057][  T306]  get_page_from_freelist+0x2ca9/0x2d20
[   35.029594][  T306]  __alloc_pages+0x1fa/0x610
[   35.034162][  T306]  alloc_slab_page+0x6e/0xf0
[   35.038736][  T306]  new_slab+0x98/0x3e0
[   35.042777][  T306]  ___slab_alloc+0x70f/0xb70
[   35.047346][  T306]  __slab_alloc+0x5e/0xa0
[   35.051650][  T306]  __kmem_cache_alloc_node+0x204/0x2d0
[   35.057085][  T306]  __kmalloc_node_track_caller+0xa1/0x1e0
[   35.062777][  T306]  __alloc_skb+0x226/0x4a0
[   35.067183][  T306]  inet6_netconf_notify_devconf+0x107/0x1c0
[   35.073068][  T306]  __addrconf_sysctl_register+0x36e/0x3e0
[   35.078764][  T306]  addrconf_sysctl_register+0x147/0x1a0
[   35.084287][  T306]  ipv6_add_dev+0xbf5/0x1130
[   35.088867][  T306]  addrconf_notify+0x6d0/0xe30
[   35.093606][  T306] page last free stack trace:
[   35.098255][  T306]  free_unref_page_prepare+0x80c/0x820
[   35.103702][  T306]  free_unref_page+0x93/0x530
[   35.108454][  T306]  __free_pages+0x67/0x100
[   35.112846][  T306]  free_pages+0x82/0x90
[   35.116981][  T306]  __stack_depot_save+0x45f/0x490
[   35.121981][  T306]  kasan_set_track+0x60/0x70
[   35.126546][  T306]  kasan_save_alloc_info+0x1f/0x30
[   35.131630][  T306]  __kasan_kmalloc+0x95/0xb0
[   35.136197][  T306]  __kmalloc_node_track_caller+0xb1/0x1e0
[   35.141890][  T306]  kmemdup+0x2b/0x60
[   35.145778][  T306]  __addrconf_sysctl_register+0xb6/0x3e0
[   35.151385][  T306]  addrconf_sysctl_register+0x147/0x1a0
[   35.156904][  T306]  ipv6_add_dev+0xbf5/0x1130
[   35.161478][  T306]  addrconf_notify+0x6d0/0xe30
[   35.166216][  T306]  raw_notifier_call_chain+0xa1/0x110
[   35.171562][  T306]  call_netdevice_notifiers+0x119/0x190
[   35.177092][  T306] 
[   35.179391][  T306] Memory state around the buggy address:
[   35.184992][  T306]  ffff888122c04400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   35.193027][  T306]  ffff888122c04480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   35.201061][  T306] >ffff888122c04500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   35.209110][  T306]                                                  ^
[   35.215754][  T306]  ffff888122c04580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[pid   306] close(3)                    = 0
[pid   306] close(4)                    = 0
[pid   306] close(5)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(6)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(7)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(8)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(9)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(10)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(11)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(12)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(13)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(14)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(15)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(16)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(17)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(18)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(19)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(20)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(21)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(22)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(23)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(24)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(25)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(26)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(27)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(28)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(29)                   = -1 EBADF (Bad file descriptor)
[pid   306] exit_group(1)               = ?
[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=7 /* 0.07 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   35.223790