ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor4276492092

<...>
Warning: Permanently added '10.128.1.25' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor4276492092", ["ci2-android-6-1/syz-executor4276492092"], 0x7ffd080d4ad0 /* 10 vars */) = 0
brk(NULL)                               = 0x55559117a000
brk(0x55559117ad40)                     = 0x55559117ad40
arch_prctl(ARCH_SET_FS, 0x55559117a3c0) = 0
set_tid_address(0x55559117a690)         = 304
set_robust_list(0x55559117a6a0, 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-executor4276492092", 4096) = 44
getrandom("\x69\x72\x5c\x59\xdd\x4d\x09\xee", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55559117ad40
brk(0x55559119bd40)                     = 0x55559119bd40
brk(0x55559119c000)                     = 0x55559119c000
mprotect(0x7f2edf981000, 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=0x55559117a690) = 305
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
ci2-android-6-1/strace-static-x86_64: Process 305 attached
[pid   305] set_robust_list(0x55559117a6a0, 24) = 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
[   24.693472][   T28] audit: type=1400 audit(1786148257.646:64): avc:  denied  { execmem } for  pid=304 comm="syz-executor427" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   24.713364][   T28] audit: type=1400 audit(1786148257.646:65): avc:  denied  { mounton } for  pid=305 comm="syz-executor427" 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("", "./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
[   24.742432][   T28] audit: type=1400 audit(1786148257.696:66): avc:  denied  { mounton } for  pid=305 comm="syz-executor427" 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
[   24.765557][   T28] audit: type=1400 audit(1786148257.696:67): avc:  denied  { mount } for  pid=305 comm="syz-executor427" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem 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_INET, 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\x04\x00\x00\x00\x03\x00\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\xfc\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"}, 50) = 0
[pid   305] ioctl(3, BTRFS_IOC_SUBVOL_SYNC_WAIT, 0) = -1 ENOTTY (Inappropriate ioctl for device)
[   24.774210][  T305] request_module fs-gadgetfs succeeded, but still no fs?
[   24.788427][   T28] audit: type=1400 audit(1786148257.696:68): avc:  denied  { mounton } for  pid=305 comm="syz-executor427" 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
[   24.818813][   T28] audit: type=1400 audit(1786148257.696:69): avc:  denied  { mount } for  pid=305 comm="syz-executor427" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   24.840869][   T28] audit: type=1400 audit(1786148257.696:70): avc:  denied  { mounton } for  pid=305 comm="syz-executor427" 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
[   24.841262][  T305] ==================================================================
[   24.866587][   T28] audit: type=1400 audit(1786148257.696:71): avc:  denied  { mounton } for  pid=305 comm="syz-executor427" path="/root/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=14325 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   24.874418][  T305] BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0
[   24.900748][   T28] audit: type=1400 audit(1786148257.696:72): avc:  denied  { unmount } for  pid=305 comm="syz-executor427" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   24.907309][  T305] Write of size 8 at addr ffff8881100ebd50 by task syz-executor427/305
[   24.907329][  T305] 
[   24.907351][  T305] CPU: 0 PID: 305 Comm: syz-executor427 Not tainted syzkaller #0
[   24.927043][   T28] audit: type=1400 audit(1786148257.716:73): avc:  denied  { mounton } for  pid=305 comm="syz-executor427" path="/dev/gadgetfs" dev="devtmpfs" ino=570 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
[   24.935191][  T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   24.935216][  T305] Call Trace:
[   24.981503][  T305]  <TASK>
[   24.984458][  T305]  __dump_stack+0x21/0x24
[   24.988793][  T305]  dump_stack_lvl+0x110/0x170
[   24.993492][  T305]  ? __cfi_dump_stack_lvl+0x8/0x8
[   24.998610][  T305]  ? mutex_lock+0x86/0x1b0
[   25.003125][  T305]  print_address_description+0x71/0x200
[   25.008688][  T305]  print_report+0x4a/0x60
[   25.013021][  T305]  kasan_report+0x122/0x150
[   25.017527][  T305]  ? mutex_lock+0x86/0x1b0
[   25.021953][  T305]  kasan_check_range+0x249/0x2a0
[   25.026906][  T305]  __kasan_check_write+0x14/0x20
[   25.031952][  T305]  mutex_lock+0x86/0x1b0
[   25.036218][  T305]  ? __cfi_mutex_lock+0x10/0x10
[   25.041100][  T305]  ? kfree+0x6f/0xf0
[   25.045022][  T305]  ? l2tp_session_put+0xaf/0x1a0
[   25.049982][  T305]  ? l2tp_session_delete+0x3df/0x4d0
[   25.055297][  T305]  pppol2tp_release+0x178/0x2b0
[   25.060158][  T305]  sock_close+0xc9/0x220
[   25.064417][  T305]  ? __cfi_sock_close+0x10/0x10
[   25.069284][  T305]  __fput+0x1fd/0x8f0
[   25.073290][  T305]  ____fput+0x15/0x20
[   25.077290][  T305]  task_work_run+0x1e1/0x250
[   25.081909][  T305]  ? __cfi_task_work_run+0x10/0x10
[   25.087069][  T305]  ptrace_notify+0x23f/0x270
[   25.091814][  T305]  ? __cfi_task_work_add+0x10/0x10
[   25.097001][  T305]  ? __cfi_ptrace_notify+0x10/0x10
[   25.102145][  T305]  ? fput+0x15b/0x1a0
[   25.106143][  T305]  ? filp_close+0x111/0x160
[   25.110659][  T305]  syscall_exit_work+0x84/0x140
[   25.115689][  T305]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   25.121868][  T305]  syscall_exit_to_user_mode+0xd/0x30
[   25.127251][  T305]  do_syscall_64+0x58/0xa0
[   25.131671][  T305]  ? clear_bhb_loop+0x30/0x80
[   25.136346][  T305]  ? clear_bhb_loop+0x30/0x80
[   25.141021][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.146924][  T305] RIP: 0033:0x7f2edf900557
[   25.151349][  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
[   25.171300][  T305] RSP: 002b:00007fffb5a4f4d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[   25.179728][  T305] RAX: 0000000000000000 RBX: 000055559117a3c0 RCX: 00007f2edf900557
[   25.187699][  T305] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   25.195674][  T305] RBP: 00007f2edf956126 R08: 0000000000000000 R09: 0000000000000000
[   25.203646][  T305] R10: 0000000000000000 R11: 0000000000000202 R12: 00007f2edf957df0
[   25.211615][  T305] R13: 00007f2edf95608e R14: 00007f2edf981bc0 R15: 0000000000000002
[   25.219602][  T305]  </TASK>
[   25.222620][  T305] 
[   25.224945][  T305] Allocated by task 305:
[   25.229177][  T305]  kasan_set_track+0x4b/0x70
[   25.233783][  T305]  kasan_save_alloc_info+0x1f/0x30
[   25.238901][  T305]  __kasan_kmalloc+0x95/0xb0
[   25.243489][  T305]  __kmalloc+0xb4/0x1e0
[   25.247741][  T305]  l2tp_session_create+0x38/0xbd0
[   25.252768][  T305]  pppol2tp_connect+0xbf5/0x1640
[   25.257713][  T305]  __sys_connect+0x3da/0x460
[   25.262299][  T305]  __x64_sys_connect+0x7a/0x90
[   25.267059][  T305]  x64_sys_call+0x88d/0x9a0
[   25.271673][  T305]  do_syscall_64+0x4c/0xa0
[   25.276096][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.282016][  T305] 
[   25.284346][  T305] Freed by task 305:
[   25.288236][  T305]  kasan_set_track+0x4b/0x70
[   25.292860][  T305]  kasan_save_free_info+0x2b/0x40
[   25.297884][  T305]  ____kasan_slab_free+0x132/0x180
[   25.303000][  T305]  __kasan_slab_free+0x11/0x20
[   25.307779][  T305]  slab_free_freelist_hook+0xc2/0x190
[   25.313161][  T305]  __kmem_cache_free+0xb7/0x1b0
[   25.318016][  T305]  kfree+0x6f/0xf0
[   25.321734][  T305]  l2tp_session_put+0xaf/0x1a0
[   25.326510][  T305]  l2tp_session_delete+0x3df/0x4d0
[   25.331630][  T305]  pppol2tp_release+0x169/0x2b0
[   25.336482][  T305]  sock_close+0xc9/0x220
[   25.340734][  T305]  __fput+0x1fd/0x8f0
[   25.344717][  T305]  ____fput+0x15/0x20
[   25.348698][  T305]  task_work_run+0x1e1/0x250
[   25.353290][  T305]  ptrace_notify+0x23f/0x270
[   25.357884][  T305]  syscall_exit_work+0x84/0x140
[   25.362735][  T305]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   25.368887][  T305]  syscall_exit_to_user_mode+0xd/0x30
[   25.374261][  T305]  do_syscall_64+0x58/0xa0
[   25.378676][  T305]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.384571][  T305] 
[   25.386889][  T305] The buggy address belongs to the object at ffff8881100ebc00
[   25.386889][  T305]  which belongs to the cache kmalloc-512 of size 512
[   25.400949][  T305] The buggy address is located 336 bytes inside of
[   25.400949][  T305]  512-byte region [ffff8881100ebc00, ffff8881100ebe00)
[   25.414241][  T305] 
[   25.416598][  T305] The buggy address belongs to the physical page:
[   25.423015][  T305] page:ffffea0004403a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1100e8
[   25.433265][  T305] head:ffffea0004403a00 order:2 compound_mapcount:0 compound_pincount:0
[   25.441607][  T305] flags: 0x4000000000010200(slab|head|zone=1)
[   25.447692][  T305] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
[   25.456295][  T305] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[   25.464874][  T305] page dumped because: kasan: bad access detected
[   25.471294][  T305] page_owner tracks the page as allocated
[   25.477017][  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 305, tgid 305 (syz-executor427), ts 24737211538, free_ts 24736911470
[   25.498560][  T305]  post_alloc_hook+0x1f5/0x210
[   25.503334][  T305]  prep_new_page+0x1c/0x110
[   25.507837][  T305]  get_page_from_freelist+0x2ca9/0x2d20
[   25.513390][  T305]  __alloc_pages+0x1fa/0x610
[   25.517983][  T305]  alloc_slab_page+0x6e/0xf0
[   25.522582][  T305]  new_slab+0x98/0x3e0
[   25.526647][  T305]  ___slab_alloc+0x70f/0xb70
[   25.531235][  T305]  __slab_alloc+0x5e/0xa0
[   25.535568][  T305]  __kmem_cache_alloc_node+0x204/0x2d0
[   25.541032][  T305]  __kmalloc+0xa4/0x1e0
[   25.545197][  T305]  ops_init+0x88/0x470
[   25.549271][  T305]  setup_net+0x4b4/0xcd0
[   25.553513][  T305]  copy_net_ns+0x355/0x5c0
[   25.557930][  T305]  create_new_namespaces+0x3a8/0x660
[   25.563215][  T305]  unshare_nsproxy_namespaces+0x120/0x170
[   25.568935][  T305]  ksys_unshare+0x4d7/0x820
[   25.573443][  T305] page last free stack trace:
[   25.578113][  T305]  free_unref_page_prepare+0x80c/0x820
[   25.583588][  T305]  free_unref_page+0x93/0x530
[   25.588266][  T305]  __free_pages+0x67/0x100
[   25.592684][  T305]  free_pages+0x82/0x90
[   25.596851][  T305]  __stack_depot_save+0x45f/0x490
[   25.601892][  T305]  kasan_set_track+0x60/0x70
[   25.606485][  T305]  kasan_save_free_info+0x2b/0x40
[   25.611506][  T305]  ____kasan_slab_free+0x132/0x180
[   25.616618][  T305]  __kasan_slab_free+0x11/0x20
[   25.621382][  T305]  slab_free_freelist_hook+0xc2/0x190
[   25.626750][  T305]  __kmem_cache_free+0xb7/0x1b0
[   25.631602][  T305]  kfree+0x6f/0xf0
[   25.635318][  T305]  kobject_uevent_env+0x354/0x720
[   25.640360][  T305]  kobject_uevent+0x1d/0x30
[   25.644858][  T305]  netdev_queue_update_kobjects+0x22c/0x470
[   25.650846][  T305]  netdev_register_kobject+0x281/0x330
[   25.656309][  T305] 
[   25.658625][  T305] Memory state around the buggy address:
[   25.664254][  T305]  ffff8881100ebc00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.672310][  T305]  ffff8881100ebc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.680387][  T305] >ffff8881100ebd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   25.688443][  T305]                                                  ^
[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=10 /* 0.10 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   25.695195][  T305]  ffff888110