ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor4034815012

<...>
Warning: Permanently added '10.128.1.22' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor4034815012", ["ci2-android-6-1/syz-executor4034815012"], 0x7ffc8a54bcc0 /* 10 vars */) = 0
brk(NULL)                               = 0x55555da56000
brk(0x55555da56d40)                     = 0x55555da56d40
arch_prctl(ARCH_SET_FS, 0x55555da563c0) = 0
set_tid_address(0x55555da56690)         = 304
set_robust_list(0x55555da566a0, 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-executor4034815012", 4096) = 44
getrandom("\x3b\x6d\x3c\x01\x31\x7f\x1d\x5b", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55555da56d40
brk(0x55555da77d40)                     = 0x55555da77d40
brk(0x55555da78000)                     = 0x55555da78000
mprotect(0x7f130b308000, 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=0x55555da56690) = 305
ci2-android-6-1/strace-static-x86_64: Process 305 attached
[pid   304] rt_sigprocmask(SIG_SETMASK, [] <unfinished ...>
[pid   305] set_robust_list(0x55555da566a0, 24 <unfinished ...>
[pid   304] <... rt_sigprocmask resumed>, NULL, 8) = 0
[pid   305] <... set_robust_list resumed>) = 0
[pid   305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   305] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   305] getppid()                   = 0
[pid   305] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid   305] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid   305] unshare(CLONE_NEWNS)        = 0
[pid   305] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] unshare(CLONE_NEWIPC)       = -1 EINVAL (Invalid argument)
[pid   305] unshare(CLONE_NEWCGROUP)    = 0
[pid   305] unshare(CLONE_NEWUTS)       = 0
[pid   305] unshare(CLONE_SYSVSEM)      = 0
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   305] getpid()                    = 1
[pid   305] 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   305] 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   305] unshare(CLONE_NEWNET)       = 0
[pid   305] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid   305] write(3, "0 65535", 7)      = 7
[pid   305] close(3)                    = 0
[pid   305] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid   305] write(3, "100000", 6)       = 6
[pid   305] close(3)                    = 0
[pid   305] mkdir("./syz-tmp", 0777)    = 0
[pid   305] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot", 0777) = 0
[pid   305] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid   305] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid   305] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid   305] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   305] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid   305] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] 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   305] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   305] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid   305] 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   305] mkdir("./syz-tmp/pivot", 0777) = 0
[pid   305] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid   305] chdir("/")                  = 0
[pid   305] umount2("./pivot", MNT_DETACH) = 0
[pid   305] chroot("./newroot")         = 0
[pid   305] chdir("/")                  = 0
[pid   305] mkdir("/dev/gadgetfs", 0777) = 0
[   23.438110][   T28] audit: type=1400 audit(1789450202.475:64): avc:  denied  { execmem } for  pid=304 comm="syz-executor403" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   23.461087][   T28] audit: type=1400 audit(1789450202.505:65): avc:  denied  { mounton } for  pid=305 comm="syz-executor403" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1
[pid   305] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = -1 ENODEV (No such device)
[pid   305] mkdir("/dev/binderfs", 0777) = 0
[pid   305] mount("binder", "/dev/binderfs", "binder", 0, NULL) = 0
[pid   305] symlink("/dev/binderfs", "./binderfs") = 0
[pid   305] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
executing program
[pid   305] write(1, "executing program\n", 18) = 18
[pid   305] socket(AF_PPPOX, SOCK_STREAM, 1) = 3
[pid   305] socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP) = 4
[pid   305] connect(3, {sa_family=AF_PPPOX, sa_data="\x01\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x20\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00"}, 50) = 0
[pid   305] ioctl(3, SIOCGIFMTU, NULL)  = -1 EFAULT (Bad address)
[   23.482891][   T28] audit: type=1400 audit(1789450202.505:66): avc:  denied  { mounton } for  pid=305 comm="syz-executor403" 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
[   23.484617][  T305] request_module fs-gadgetfs succeeded, but still no fs?
[   23.505998][   T28] audit: type=1400 audit(1789450202.505:67): avc:  denied  { mount } for  pid=305 comm="syz-executor403" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1
[   23.535240][   T28] audit: type=1400 audit(1789450202.505:68): avc:  denied  { mounton } for  pid=305 comm="syz-executor403" 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
[   23.559232][  T305] ==================================================================
[   23.559253][   T28] audit: type=1400 audit(1789450202.505:69): avc:  denied  { mount } for  pid=305 comm="syz-executor403" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   23.567299][  T305] BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0
[   23.567337][  T305] Write of size 8 at addr ffff88810fcfed50 by task syz-executor403/305
[   23.589219][   T28] audit: type=1400 audit(1789450202.505:70): avc:  denied  { mounton } for  pid=305 comm="syz-executor403" 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
[   23.595939][  T305] 
[   23.595945][  T305] CPU: 0 PID: 305 Comm: syz-executor403 Not tainted syzkaller #0
[   23.604178][   T28] audit: type=1400 audit(1789450202.505:71): avc:  denied  { mounton } for  pid=305 comm="syz-executor403" path="/root/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=14631 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   23.629331][  T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   23.629343][  T305] Call Trace:
[   23.629348][  T305]  <TASK>
[   23.629355][  T305]  __dump_stack+0x21/0x24
[   23.631716][   T28] audit: type=1400 audit(1789450202.505:72): avc:  denied  { unmount } for  pid=305 comm="syz-executor403" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   23.639398][  T305]  dump_stack_lvl+0x110/0x170
[   23.665449][   T28] audit: type=1400 audit(1789450202.525:73): avc:  denied  { mounton } for  pid=305 comm="syz-executor403" path="/dev/gadgetfs" dev="devtmpfs" ino=570 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
[   23.675478][  T305]  ? __cfi_dump_stack_lvl+0x8/0x8
[   23.675516][  T305]  ? mutex_lock+0x86/0x1b0
[   23.742565][  T305]  print_address_description+0x71/0x200
[   23.748109][  T305]  print_report+0x4a/0x60
[   23.752948][  T305]  kasan_report+0x122/0x150
[   23.757442][  T305]  ? mutex_lock+0x86/0x1b0
[   23.761841][  T305]  kasan_check_range+0x249/0x2a0
[   23.766766][  T305]  __kasan_check_write+0x14/0x20
[   23.771689][  T305]  mutex_lock+0x86/0x1b0
[   23.775918][  T305]  ? __cfi_mutex_lock+0x10/0x10
[   23.780757][  T305]  ? kfree+0x6f/0xf0
[   23.784632][  T305]  ? l2tp_session_put+0xaf/0x1a0
[   23.789555][  T305]  ? l2tp_session_delete+0x3df/0x4d0
[   23.794827][  T305]  pppol2tp_release+0x178/0x2b0
[   23.799662][  T305]  sock_close+0xc9/0x220
[   23.803887][  T305]  ? __cfi_sock_close+0x10/0x10
[   23.808719][  T305]  __fput+0x1fd/0x8f0
[   23.812685][  T305]  ____fput+0x15/0x20
[   23.816653][  T305]  task_work_run+0x1e1/0x250
[   23.821227][  T305]  ? __cfi_task_work_run+0x10/0x10
[   23.826338][  T305]  ptrace_notify+0x23f/0x270
[   23.830933][  T305]  ? __cfi_task_work_add+0x10/0x10
[   23.836027][  T305]  ? __cfi_ptrace_notify+0x10/0x10
[   23.841121][  T305]  ? fput+0x15b/0x1a0
[   23.845086][  T305]  ? filp_close+0x111/0x160
[   23.849574][  T305]  syscall_exit_work+0x84/0x140
[   23.854423][  T305]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   23.860559][  T305]  syscall_exit_to_user_mode+0xd/0x30
[   23.865914][  T305]  do_syscall_64+0x58/0xa0
[   23.870316][  T305]  ? clear_bhb_loop+0x30/0x80
[   23.874979][  T305]  ? clear_bhb_loop+0x30/0x80
[   23.879640][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   23.885515][  T305] RIP: 0033:0x7f130b287557
[   23.889928][  T305] 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
[   23.909529][  T305] RSP: 002b:00007fffe77a63c0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[   23.917924][  T305] RAX: 0000000000000000 RBX: 000055555da563c0 RCX: 00007f130b287557
[   23.925880][  T305] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   23.933834][  T305] RBP: 00007f130b2dd126 R08: 0000000000000000 R09: 0000000000000000
[   23.941787][  T305] R10: 0000000000000000 R11: 0000000000000202 R12: 00007f130b2dedf0
[   23.949741][  T305] R13: 00007f130b2dd08e R14: 00007f130b308bc0 R15: 0000000000000002
[   23.957698][  T305]  </TASK>
[   23.960704][  T305] 
[   23.963011][  T305] Allocated by task 305:
[   23.967231][  T305]  kasan_set_track+0x4b/0x70
[   23.971824][  T305]  kasan_save_alloc_info+0x1f/0x30
[   23.976918][  T305]  __kasan_kmalloc+0x95/0xb0
[   23.981492][  T305]  __kmalloc+0xb4/0x1e0
[   23.985632][  T305]  l2tp_session_create+0x38/0xbd0
[   23.990658][  T305]  pppol2tp_connect+0xbf5/0x1640
[   23.995766][  T305]  __sys_connect+0x3da/0x460
[   24.000342][  T305]  __x64_sys_connect+0x7a/0x90
[   24.005093][  T305]  x64_sys_call+0x88d/0x9a0
[   24.009604][  T305]  do_syscall_64+0x4c/0xa0
[   24.014022][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   24.019896][  T305] 
[   24.022201][  T305] Freed by task 305:
[   24.026070][  T305]  kasan_set_track+0x4b/0x70
[   24.030641][  T305]  kasan_save_free_info+0x2b/0x40
[   24.035647][  T305]  ____kasan_slab_free+0x132/0x180
[   24.040740][  T305]  __kasan_slab_free+0x11/0x20
[   24.045488][  T305]  slab_free_freelist_hook+0xc2/0x190
[   24.050841][  T305]  __kmem_cache_free+0xb7/0x1b0
[   24.055673][  T305]  kfree+0x6f/0xf0
[   24.059388][  T305]  l2tp_session_put+0xaf/0x1a0
[   24.064134][  T305]  l2tp_session_delete+0x3df/0x4d0
[   24.069227][  T305]  pppol2tp_release+0x169/0x2b0
[   24.074063][  T305]  sock_close+0xc9/0x220
[   24.078285][  T305]  __fput+0x1fd/0x8f0
[   24.082250][  T305]  ____fput+0x15/0x20
[   24.086217][  T305]  task_work_run+0x1e1/0x250
[   24.090830][  T305]  ptrace_notify+0x23f/0x270
[   24.095416][  T305]  syscall_exit_work+0x84/0x140
[   24.100247][  T305]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   24.106380][  T305]  syscall_exit_to_user_mode+0xd/0x30
[   24.111739][  T305]  do_syscall_64+0x58/0xa0
[   24.116156][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   24.122032][  T305] 
[   24.124358][  T305] The buggy address belongs to the object at ffff88810fcfec00
[   24.124358][  T305]  which belongs to the cache kmalloc-512 of size 512
[   24.138411][  T305] The buggy address is located 336 bytes inside of
[   24.138411][  T305]  512-byte region [ffff88810fcfec00, ffff88810fcfee00)
[   24.151673][  T305] 
[   24.153983][  T305] The buggy address belongs to the physical page:
[   24.160375][  T305] page:ffffea00043f3f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fcfc
[   24.170594][  T305] head:ffffea00043f3f00 order:2 compound_mapcount:0 compound_pincount:0
[   24.178901][  T305] flags: 0x4000000000010200(slab|head|zone=1)
[   24.184955][  T305] raw: 4000000000010200 ffffea000440f400 dead000000000002 ffff888100042f00
[   24.193536][  T305] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[   24.202093][  T305] page dumped because: kasan: bad access detected
[   24.208481][  T305] page_owner tracks the page as allocated
[   24.214189][  T305] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 97, tgid 97 (S02sysctl), ts 3708674310, free_ts 0
[   24.233963][  T305]  post_alloc_hook+0x1f5/0x210
[   24.238730][  T305]  prep_new_page+0x1c/0x110
[   24.243216][  T305]  get_page_from_freelist+0x2ca9/0x2d20
[   24.248746][  T305]  __alloc_pages+0x1fa/0x610
[   24.253324][  T305]  alloc_slab_page+0x6e/0xf0
[   24.257892][  T305]  new_slab+0x98/0x3e0
[   24.261942][  T305]  ___slab_alloc+0x70f/0xb70
[   24.266516][  T305]  __slab_alloc+0x5e/0xa0
[   24.270828][  T305]  __kmem_cache_alloc_node+0x204/0x2d0
[   24.276282][  T305]  kmalloc_trace+0x29/0xb0
[   24.280719][  T305]  alloc_bprm+0x59/0x750
[   24.284976][  T305]  do_execveat_common+0x1a7/0xaa0
[   24.290011][  T305]  __x64_sys_execve+0x92/0xb0
[   24.294683][  T305]  x64_sys_call+0x98/0x9a0
[   24.299091][  T305]  do_syscall_64+0x4c/0xa0
[   24.303581][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   24.309457][  T305] page_owner free stack trace missing
[   24.314803][  T305] 
[   24.317114][  T305] Memory state around the buggy address:
[   24.322726][  T305]  ffff88810fcfec00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   24.330771][  T305]  ffff88810fcfec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[pid   305] close(3)                    = 0
[pid   305] close(4)                    = 0
[pid   305] close(5)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(6)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(7)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(8)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(9)                    = -1 EBADF (Bad file descriptor)
[pid   305] close(10)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(11)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(12)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(13)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(14)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(15)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(16)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(17)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(18)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(19)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(20)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(21)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(22)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(23)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(24)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(25)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(26)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(27)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(28)                   = -1 EBADF (Bad file descriptor)
[pid   305] close(29)                   = -1 EBADF (Bad file descriptor)
[pid   305] exit_group(1)               = ?
[pid   305] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=305, si_uid=0, si_status=1, si_utime=0, si_stime=6 /* 0.06 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   24.338810][  T305] >ffff88810fcfed00