ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor231778365

<...>


syzkaller
syzkaller login: [   13.846914][   T28] kauditd_printk_skb: 31 callbacks suppressed
[   13.846930][   T28] audit: type=1400 audit(1785835286.758:59): avc:  denied  { transition } for  pid=223 comm="sshd-session" path="/bin/sh" dev="sda1" ino=90 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   13.851861][   T28] audit: type=1400 audit(1785835286.758:60): avc:  denied  { noatsecure } for  pid=223 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   13.855884][   T28] audit: type=1400 audit(1785835286.778:61): avc:  denied  { write } for  pid=223 comm="sh" path="pipe:[13884]" dev="pipefs" ino=13884 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1
[   13.859360][   T28] audit: type=1400 audit(1785835286.778:62): avc:  denied  { rlimitinh } for  pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   13.862877][   T28] audit: type=1400 audit(1785835286.778:63): avc:  denied  { siginh } for  pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
Warning: Permanently added '10.128.1.122' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor231778365", ["ci2-android-6-1/syz-executor231778365"], 0x7ffff9bdbe50 /* 10 vars */) = 0
brk(NULL)                               = 0x555593733000
brk(0x555593733d40)                     = 0x555593733d40
arch_prctl(ARCH_SET_FS, 0x5555937333c0) = 0
set_tid_address(0x555593733690)         = 305
set_robust_list(0x5555937336a0, 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-executor231778365", 4096) = 43
getrandom("\xe4\x8d\x7f\xcc\x41\x79\x6c\xc0", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555593733d40
brk(0x555593754d40)                     = 0x555593754d40
brk(0x555593755000)                     = 0x555593755000
mprotect(0x7f4120e4a000, 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=0x555593733690) = 306
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 306 attached
[pid   306] set_robust_list(0x5555937336a0, 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
[   24.511551][   T28] audit: type=1400 audit(1785835297.428:64): avc:  denied  { execmem } for  pid=305 comm="syz-executor231" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   24.531718][   T28] audit: type=1400 audit(1785835297.428:65): avc:  denied  { mounton } for  pid=306 comm="syz-executor231" 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("", "./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
[   24.564372][   T28] audit: type=1400 audit(1785835297.478:66): avc:  denied  { mounton } for  pid=306 comm="syz-executor231" 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
[   24.587479][   T28] audit: type=1400 audit(1785835297.478:67): avc:  denied  { mount } for  pid=306 comm="syz-executor231" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem 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)
executing program
[pid   306] write(1, "executing program\n", 18) = 18
[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\xff\xff\xff\xff\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, BTRFS_IOC_SEND, NULL) = -1 ENOTTY (Inappropriate ioctl for device)
[   24.595411][  T306] request_module fs-gadgetfs succeeded, but still no fs?
[   24.610375][   T28] audit: type=1400 audit(1785835297.478:68): avc:  denied  { mounton } for  pid=306 comm="syz-executor231" 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
[   24.640776][   T28] audit: type=1400 audit(1785835297.488:69): avc:  denied  { mount } for  pid=306 comm="syz-executor231" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   24.662791][  T306] ==================================================================
[   24.663248][   T28] audit: type=1400 audit(1785835297.488:70): avc:  denied  { mounton } for  pid=306 comm="syz-executor231" 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
[   24.670870][  T306] BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0
[   24.696668][   T28] audit: type=1400 audit(1785835297.488:71): avc:  denied  { mounton } for  pid=306 comm="syz-executor231" path="/root/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=14087 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   24.702842][  T306] Write of size 8 at addr ffff8881102ad150 by task syz-executor231/306
[   24.702861][  T306] 
[   24.702876][  T306] CPU: 1 PID: 306 Comm: syz-executor231 Not tainted syzkaller #0
[   24.729607][   T28] audit: type=1400 audit(1785835297.488:72): avc:  denied  { unmount } for  pid=306 comm="syz-executor231" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   24.737131][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   24.739994][   T28] audit: type=1400 audit(1785835297.508:73): avc:  denied  { mounton } for  pid=306 comm="syz-executor231" path="/dev/gadgetfs" dev="devtmpfs" ino=570 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
[   24.747213][  T306] Call Trace:
[   24.802967][  T306]  <TASK>
[   24.805921][  T306]  __dump_stack+0x21/0x24
[   24.810277][  T306]  dump_stack_lvl+0x110/0x170
[   24.814960][  T306]  ? __cfi_dump_stack_lvl+0x8/0x8
[   24.819988][  T306]  ? mutex_lock+0x86/0x1b0
[   24.824414][  T306]  print_address_description+0x71/0x200
[   24.829980][  T306]  print_report+0x4a/0x60
[   24.834315][  T306]  kasan_report+0x122/0x150
[   24.838827][  T306]  ? mutex_lock+0x86/0x1b0
[   24.843250][  T306]  kasan_check_range+0x249/0x2a0
[   24.848194][  T306]  __kasan_check_write+0x14/0x20
[   24.853141][  T306]  mutex_lock+0x86/0x1b0
[   24.857411][  T306]  ? __cfi_mutex_lock+0x10/0x10
[   24.862284][  T306]  ? kfree+0x6f/0xf0
[   24.866192][  T306]  ? l2tp_session_put+0xaf/0x1a0
[   24.871143][  T306]  ? l2tp_session_delete+0x3df/0x4d0
[   24.876442][  T306]  pppol2tp_release+0x178/0x2b0
[   24.881309][  T306]  sock_close+0xc9/0x220
[   24.885570][  T306]  ? __cfi_sock_close+0x10/0x10
[   24.890443][  T306]  __fput+0x1fd/0x8f0
[   24.894449][  T306]  ____fput+0x15/0x20
[   24.898449][  T306]  task_work_run+0x1e1/0x250
[   24.903061][  T306]  ? __cfi_task_work_run+0x10/0x10
[   24.908189][  T306]  ptrace_notify+0x23f/0x270
[   24.912803][  T306]  ? __cfi_task_work_add+0x10/0x10
[   24.917932][  T306]  ? __cfi_ptrace_notify+0x10/0x10
[   24.923068][  T306]  ? fput+0x15b/0x1a0
[   24.927070][  T306]  ? filp_close+0x111/0x160
[   24.931592][  T306]  syscall_exit_work+0x84/0x140
[   24.936458][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   24.942629][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   24.948037][  T306]  do_syscall_64+0x58/0xa0
[   24.952472][  T306]  ? clear_bhb_loop+0x30/0x80
[   24.957168][  T306]  ? clear_bhb_loop+0x30/0x80
[   24.961862][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   24.967776][  T306] RIP: 0033:0x7f4120dc9557
[   24.972217][  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
[   24.991848][  T306] RSP: 002b:00007ffdfb706690 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[   25.000297][  T306] RAX: 0000000000000000 RBX: 00005555937333c0 RCX: 00007f4120dc9557
[   25.008288][  T306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   25.016359][  T306] RBP: 00007f4120e1f126 R08: 0000000000000000 R09: 0000000000000000
[   25.024343][  T306] R10: 0000000000000000 R11: 0000000000000202 R12: 00007f4120e20df0
[   25.032323][  T306] R13: 00007f4120e1f08e R14: 00007f4120e4abc0 R15: 0000000000000002
[   25.040573][  T306]  </TASK>
[   25.043615][  T306] 
[   25.045947][  T306] Allocated by task 306:
[   25.050195][  T306]  kasan_set_track+0x4b/0x70
[   25.054822][  T306]  kasan_save_alloc_info+0x1f/0x30
[   25.060038][  T306]  __kasan_kmalloc+0x95/0xb0
[   25.064641][  T306]  __kmalloc+0xb4/0x1e0
[   25.068808][  T306]  l2tp_session_create+0x38/0xbd0
[   25.073848][  T306]  pppol2tp_connect+0xbf5/0x1640
[   25.078799][  T306]  __sys_connect+0x3da/0x460
[   25.083401][  T306]  __x64_sys_connect+0x7a/0x90
[   25.088172][  T306]  x64_sys_call+0x88d/0x9a0
[   25.092711][  T306]  do_syscall_64+0x4c/0xa0
[   25.097144][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.103055][  T306] 
[   25.105390][  T306] Freed by task 306:
[   25.109285][  T306]  kasan_set_track+0x4b/0x70
[   25.113885][  T306]  kasan_save_free_info+0x2b/0x40
[   25.118914][  T306]  ____kasan_slab_free+0x132/0x180
[   25.124039][  T306]  __kasan_slab_free+0x11/0x20
[   25.128820][  T306]  slab_free_freelist_hook+0xc2/0x190
[   25.134217][  T306]  __kmem_cache_free+0xb7/0x1b0
[   25.139108][  T306]  kfree+0x6f/0xf0
[   25.142935][  T306]  l2tp_session_put+0xaf/0x1a0
[   25.147725][  T306]  l2tp_session_delete+0x3df/0x4d0
[   25.152897][  T306]  pppol2tp_release+0x169/0x2b0
[   25.157763][  T306]  sock_close+0xc9/0x220
[   25.162032][  T306]  __fput+0x1fd/0x8f0
[   25.166072][  T306]  ____fput+0x15/0x20
[   25.170072][  T306]  task_work_run+0x1e1/0x250
[   25.174680][  T306]  ptrace_notify+0x23f/0x270
[   25.179502][  T306]  syscall_exit_work+0x84/0x140
[   25.184381][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   25.190545][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   25.195928][  T306]  do_syscall_64+0x58/0xa0
[   25.200365][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.206282][  T306] 
[   25.208619][  T306] The buggy address belongs to the object at ffff8881102ad000
[   25.208619][  T306]  which belongs to the cache kmalloc-512 of size 512
[   25.222682][  T306] The buggy address is located 336 bytes inside of
[   25.222682][  T306]  512-byte region [ffff8881102ad000, ffff8881102ad200)
[   25.235969][  T306] 
[   25.238300][  T306] The buggy address belongs to the physical page:
[   25.244733][  T306] page:ffffea000440ab00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1102ac
[   25.254985][  T306] head:ffffea000440ab00 order:2 compound_mapcount:0 compound_pincount:0
[   25.263315][  T306] flags: 0x4000000000010200(slab|head|zone=1)
[   25.269404][  T306] raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100042f00
[   25.277994][  T306] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[   25.286586][  T306] page dumped because: kasan: bad access detected
[   25.293004][  T306] page_owner tracks the page as allocated
[   25.298743][  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 92, tgid 92 (klogd), ts 5340157061, free_ts 0
[   25.318206][  T306]  post_alloc_hook+0x1f5/0x210
[   25.322997][  T306]  prep_new_page+0x1c/0x110
[   25.327513][  T306]  get_page_from_freelist+0x2ca9/0x2d20
[   25.333075][  T306]  __alloc_pages+0x1fa/0x610
[   25.337684][  T306]  alloc_slab_page+0x6e/0xf0
[   25.342309][  T306]  new_slab+0x98/0x3e0
[   25.346388][  T306]  ___slab_alloc+0x70f/0xb70
[   25.350997][  T306]  __slab_alloc+0x5e/0xa0
[   25.355358][  T306]  __kmem_cache_alloc_node+0x204/0x2d0
[   25.361290][  T306]  __kmalloc_node_track_caller+0xa1/0x1e0
[   25.367043][  T306]  __alloc_skb+0x226/0x4a0
[   25.371480][  T306]  alloc_skb_with_frags+0xa8/0x620
[   25.376608][  T306]  sock_alloc_send_pskb+0x87f/0x9a0
[   25.381829][  T306]  unix_dgram_sendmsg+0x5c1/0x1710
[   25.386964][  T306]  __sys_sendto+0x4ac/0x660
[   25.391492][  T306]  __x64_sys_sendto+0xe5/0x100
[   25.396271][  T306] page_owner free stack trace missing
[   25.401647][  T306] 
[   25.403994][  T306] Memory state around the buggy address:
[   25.409635][  T306]  ffff8881102ad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.417714][  T306]  ffff8881102ad080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.425930][  T306] >ffff8881102ad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.433995][  T306]                                                  ^
[   25.441286][  T306]  ffff8881102ad180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.449360][  T306]  ffff8881102ad200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   25.457949][  T306] ==================================================================
[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 +++
[   25.466232][  T306] D