ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor2590827200

<...>
rocess permissive=1
[   15.034190][   T28] audit: type=1400 audit(1785694619.026:63): avc:  denied  { siginh } for  pid=226 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
Warning: Permanently added '10.128.0.132' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor2590827200", ["ci2-android-6-1/syz-executor2590827200"], 0x7ffe29a74f90 /* 10 vars */) = 0
brk(NULL)                               = 0x5555585f4000
brk(0x5555585f4d40)                     = 0x5555585f4d40
arch_prctl(ARCH_SET_FS, 0x5555585f43c0) = 0
set_tid_address(0x5555585f4690)         = 306
set_robust_list(0x5555585f46a0, 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-executor2590827200", 4096) = 44
getrandom("\xdd\x5e\x65\x4c\xd6\x6e\xf6\x6c", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x5555585f4d40
brk(0x555558615d40)                     = 0x555558615d40
brk(0x555558616000)                     = 0x555558616000
mprotect(0x7f943c6eb000, 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=0x5555585f4690) = 307
ci2-android-6-1/strace-static-x86_64: Process 307 attached
[pid   306] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   307] set_robust_list(0x5555585f46a0, 24) = 0
[pid   307] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   307] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid   307] getppid()                   = 0
[pid   307] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid   307] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid   307] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid   307] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid   307] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid   307] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid   307] unshare(CLONE_NEWNS)        = 0
[pid   307] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid   307] unshare(CLONE_NEWIPC)       = -1 EINVAL (Invalid argument)
[pid   307] unshare(CLONE_NEWCGROUP)    = 0
[pid   307] unshare(CLONE_NEWUTS)       = 0
[pid   307] unshare(CLONE_SYSVSEM)      = 0
[pid   307] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   307] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   307] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   307] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   307] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   307] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   307] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
[pid   307] getpid()                    = 1
[pid   307] 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   307] 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   307] unshare(CLONE_NEWNET)       = 0
[pid   307] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid   307] write(3, "0 65535", 7)      = 7
[pid   307] close(3)                    = 0
[pid   307] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid   307] write(3, "100000", 6)       = 6
[pid   307] close(3)                    = 0
[pid   307] mkdir("./syz-tmp", 0777)    = 0
[   25.447610][   T28] audit: type=1400 audit(1785694629.446:64): avc:  denied  { execmem } for  pid=306 comm="syz-executor259" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   25.473532][   T28] audit: type=1400 audit(1785694629.466:65): avc:  denied  { mounton } for  pid=307 comm="syz-executor259" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1
[pid   307] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[pid   307] mkdir("./syz-tmp/newroot", 0777) = 0
[pid   307] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid   307] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   307] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid   307] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid   307] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid   307] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid   307] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   307] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid   307] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   307] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   307] 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   307] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid   307] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid   307] 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   307] mkdir("./syz-tmp/pivot", 0777) = 0
[pid   307] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid   307] chdir("/")                  = 0
[pid   307] umount2("./pivot", MNT_DETACH) = 0
[pid   307] chroot("./newroot")         = 0
[pid   307] chdir("/")                  = 0
[pid   307] mkdir("/dev/gadgetfs", 0777) = 0
[   25.511282][   T28] audit: type=1400 audit(1785694629.506:66): avc:  denied  { mounton } for  pid=307 comm="syz-executor259" 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
[   25.534229][   T28] audit: type=1400 audit(1785694629.516:67): avc:  denied  { mount } for  pid=307 comm="syz-executor259" name="/" dev="tmpfs" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:tmpfs_t tclass=filesystem permissive=1
[pid   307] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = -1 ENODEV (No such device)
[pid   307] mkdir("/dev/binderfs", 0777) = 0
[pid   307] mount("binder", "/dev/binderfs", "binder", 0, NULL) = 0
[pid   307] symlink("/dev/binderfs", "./binderfs") = 0
[pid   307] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
executing program
[pid   307] write(1, "executing program\n", 18) = 18
[pid   307] socket(AF_PPPOX, SOCK_STREAM, 1) = 3
[pid   307] socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP) = 4
[pid   307] 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   307] ioctl(3, PPPIOCGL2TPSTATS, 0) = -1 EFAULT (Bad address)
[   25.556601][   T28] audit: type=1400 audit(1785694629.516:68): avc:  denied  { mounton } for  pid=307 comm="syz-executor259" 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
[   25.563814][  T307] request_module fs-gadgetfs succeeded, but still no fs?
[   25.581093][   T28] audit: type=1400 audit(1785694629.526:69): avc:  denied  { mount } for  pid=307 comm="syz-executor259" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   25.609745][   T28] audit: type=1400 audit(1785694629.536:70): avc:  denied  { mounton } for  pid=307 comm="syz-executor259" 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
[   25.635208][  T307] ==================================================================
[   25.635726][   T28] audit: type=1400 audit(1785694629.536:71): avc:  denied  { mounton } for  pid=307 comm="syz-executor259" path="/root/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=14723 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   25.643316][  T307] BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0
[   25.669959][   T28] audit: type=1400 audit(1785694629.546:72): avc:  denied  { unmount } for  pid=307 comm="syz-executor259" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   25.676181][  T307] Write of size 8 at addr ffff88810f29f550 by task syz-executor259/307
[   25.696357][   T28] audit: type=1400 audit(1785694629.556:73): avc:  denied  { mounton } for  pid=307 comm="syz-executor259" path="/dev/gadgetfs" dev="devtmpfs" ino=570 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
[   25.704037][  T307] 
[   25.704056][  T307] CPU: 1 PID: 307 Comm: syz-executor259 Not tainted syzkaller #0
[   25.736964][  T307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   25.747054][  T307] Call Trace:
[   25.750375][  T307]  <TASK>
[   25.753308][  T307]  __dump_stack+0x21/0x24
[   25.757665][  T307]  dump_stack_lvl+0x110/0x170
[   25.762364][  T307]  ? __cfi_dump_stack_lvl+0x8/0x8
[   25.767407][  T307]  ? mutex_lock+0x86/0x1b0
[   25.771872][  T307]  print_address_description+0x71/0x200
[   25.777434][  T307]  print_report+0x4a/0x60
[   25.781859][  T307]  kasan_report+0x122/0x150
[   25.786372][  T307]  ? mutex_lock+0x86/0x1b0
[   25.790797][  T307]  kasan_check_range+0x249/0x2a0
[   25.795741][  T307]  __kasan_check_write+0x14/0x20
[   25.800720][  T307]  mutex_lock+0x86/0x1b0
[   25.805006][  T307]  ? __cfi_mutex_lock+0x10/0x10
[   25.809867][  T307]  ? kfree+0x6f/0xf0
[   25.813769][  T307]  ? l2tp_session_put+0xaf/0x1a0
[   25.818715][  T307]  ? l2tp_session_delete+0x3df/0x4d0
[   25.824006][  T307]  pppol2tp_release+0x178/0x2b0
[   25.828862][  T307]  sock_close+0xc9/0x220
[   25.833138][  T307]  ? __cfi_sock_close+0x10/0x10
[   25.838000][  T307]  __fput+0x1fd/0x8f0
[   25.841997][  T307]  ____fput+0x15/0x20
[   25.845989][  T307]  task_work_run+0x1e1/0x250
[   25.850589][  T307]  ? __cfi_task_work_run+0x10/0x10
[   25.855730][  T307]  ptrace_notify+0x23f/0x270
[   25.860348][  T307]  ? __cfi_task_work_add+0x10/0x10
[   25.865484][  T307]  ? __cfi_ptrace_notify+0x10/0x10
[   25.871145][  T307]  ? fput+0x15b/0x1a0
[   25.875176][  T307]  ? filp_close+0x111/0x160
[   25.879705][  T307]  syscall_exit_work+0x84/0x140
[   25.884568][  T307]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   25.890745][  T307]  syscall_exit_to_user_mode+0xd/0x30
[   25.896144][  T307]  do_syscall_64+0x58/0xa0
[   25.900565][  T307]  ? clear_bhb_loop+0x30/0x80
[   25.905239][  T307]  ? clear_bhb_loop+0x30/0x80
[   25.909934][  T307]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   25.915839][  T307] RIP: 0033:0x7f943c66a557
[   25.920288][  T307] 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
[   25.939972][  T307] RSP: 002b:00007ffd39d7e670 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[   25.948397][  T307] RAX: 0000000000000000 RBX: 00005555585f43c0 RCX: 00007f943c66a557
[   25.956375][  T307] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   25.964626][  T307] RBP: 00007f943c6c0126 R08: 0000000000000000 R09: 0000000000000000
[   25.972610][  T307] R10: 0000000000000000 R11: 0000000000000202 R12: 00007f943c6c1df0
[   25.980607][  T307] R13: 00007f943c6c008e R14: 00007f943c6ebbc0 R15: 0000000000000002
[   25.988589][  T307]  </TASK>
[   25.991608][  T307] 
[   25.993948][  T307] Allocated by task 307:
[   25.998184][  T307]  kasan_set_track+0x4b/0x70
[   26.002784][  T307]  kasan_save_alloc_info+0x1f/0x30
[   26.008001][  T307]  __kasan_kmalloc+0x95/0xb0
[   26.012649][  T307]  __kmalloc+0xb4/0x1e0
[   26.016826][  T307]  l2tp_session_create+0x38/0xbd0
[   26.021866][  T307]  pppol2tp_connect+0xbf5/0x1640
[   26.026853][  T307]  __sys_connect+0x3da/0x460
[   26.031468][  T307]  __x64_sys_connect+0x7a/0x90
[   26.036246][  T307]  x64_sys_call+0x88d/0x9a0
[   26.040777][  T307]  do_syscall_64+0x4c/0xa0
[   26.045307][  T307]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   26.051226][  T307] 
[   26.053570][  T307] Freed by task 307:
[   26.057470][  T307]  kasan_set_track+0x4b/0x70
[   26.062078][  T307]  kasan_save_free_info+0x2b/0x40
[   26.067135][  T307]  ____kasan_slab_free+0x132/0x180
[   26.072274][  T307]  __kasan_slab_free+0x11/0x20
[   26.077081][  T307]  slab_free_freelist_hook+0xc2/0x190
[   26.082479][  T307]  __kmem_cache_free+0xb7/0x1b0
[   26.087369][  T307]  kfree+0x6f/0xf0
[   26.091113][  T307]  l2tp_session_put+0xaf/0x1a0
[   26.095900][  T307]  l2tp_session_delete+0x3df/0x4d0
[   26.101032][  T307]  pppol2tp_release+0x169/0x2b0
[   26.105914][  T307]  sock_close+0xc9/0x220
[   26.110181][  T307]  __fput+0x1fd/0x8f0
[   26.114180][  T307]  ____fput+0x15/0x20
[   26.118178][  T307]  task_work_run+0x1e1/0x250
[   26.122787][  T307]  ptrace_notify+0x23f/0x270
[   26.127397][  T307]  syscall_exit_work+0x84/0x140
[   26.132262][  T307]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   26.138440][  T307]  syscall_exit_to_user_mode+0xd/0x30
[   26.143841][  T307]  do_syscall_64+0x58/0xa0
[   26.148281][  T307]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   26.154208][  T307] 
[   26.156552][  T307] The buggy address belongs to the object at ffff88810f29f400
[   26.156552][  T307]  which belongs to the cache kmalloc-512 of size 512
[   26.170645][  T307] The buggy address is located 336 bytes inside of
[   26.170645][  T307]  512-byte region [ffff88810f29f400, ffff88810f29f600)
[   26.183936][  T307] 
[   26.186276][  T307] The buggy address belongs to the physical page:
[   26.192704][  T307] page:ffffea00043ca700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10f29c
[   26.202966][  T307] head:ffffea00043ca700 order:2 compound_mapcount:0 compound_pincount:0
[   26.211304][  T307] flags: 0x4000000000010200(slab|head|zone=1)
[   26.217396][  T307] raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100042f00
[   26.225991][  T307] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[   26.234576][  T307] page dumped because: kasan: bad access detected
[   26.241023][  T307] page_owner tracks the page as allocated
[   26.246756][  T307] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 81, tgid 81 (init), ts 4841642486, free_ts 4836935470
[   26.267186][  T307]  post_alloc_hook+0x1f5/0x210
[   26.271990][  T307]  prep_new_page+0x1c/0x110
[   26.276519][  T307]  get_page_from_freelist+0x2ca9/0x2d20
[   26.282091][  T307]  __alloc_pages+0x1fa/0x610
[   26.286701][  T307]  alloc_slab_page+0x6e/0xf0
[   26.291302][  T307]  new_slab+0x98/0x3e0
[   26.295381][  T307]  ___slab_alloc+0x70f/0xb70
[   26.299994][  T307]  __slab_alloc+0x5e/0xa0
[   26.304346][  T307]  __kmem_cache_alloc_node+0x204/0x2d0
[   26.309822][  T307]  kmalloc_trace+0x29/0xb0
[   26.314252][  T307]  alloc_bprm+0x59/0x750
[   26.318569][  T307]  do_execveat_common+0x1a7/0xaa0
[   26.323702][  T307]  __x64_sys_execve+0x92/0xb0
[   26.328490][  T307]  x64_sys_call+0x98/0x9a0
[   26.333045][  T307]  do_syscall_64+0x4c/0xa0
[   26.337487][  T307]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   26.343401][  T307] page last free stack trace:
[   26.348080][  T307]  free_unref_page_prepare+0x80c/0x820
[   26.353570][  T307]  free_unref_page+0x93/0x530
[   26.358299][  T307]  __free_pages+0x67/0x100
[   26.362736][  T307]  free_pages+0x82/0x90
[   26.366933][  T307]  __stack_depot_save+0x45f/0x490
[   26.372195][  T307]  kasan_set_track+0x60/0x70
[   26.376821][  T307]  kasan_save_free_info+0x2b/0x40
[   26.381870][  T307]  ____kasan_slab_free+0x132/0x180
[   26.387004][  T307]  __kasan_slab_free+0x11/0x20
[   26.392056][  T307]  slab_free_freelist_hook+0xc2/0x190
[   26.397564][  T307]  kmem_cache_free+0x12d/0x300
[   26.402380][  T307]  __put_task_struct+0x270/0x3e0
[   26.407365][  T307]  delayed_put_task_struct+0x6c/0x1c0
[   26.412765][  T307]  rcu_do_batch+0x52b/0xc30
[   26.417282][  T307]  rcu_core+0x486/0xf00
[   26.421453][  T307]  rcu_core_si+0x9/0x10
[   26.425629][  T307] 
[   26.427984][  T307] Memory state around the buggy address:
[   26.433627][  T307]  ffff88810f29f400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   26.441792][  T307]  ffff88810f29f480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   26.449878][  T307] >ffff88810f29f500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   26.457973][  T307]                                                  ^
[pid   307] close(3)                    = 0
[pid   307] close(4)                    = 0
[pid   307] close(5)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(6)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(7)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(8)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(9)                    = -1 EBADF (Bad file descriptor)
[pid   307] close(10)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(11)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(12)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(13)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(14)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(15)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(16)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(17)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(18)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(19)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(20)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(21)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(22)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(23)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(24)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(25)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(26)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(27)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(28)                   = -1 EBADF (Bad file descriptor)
[pid   307] close(29)                   = -1 EBADF (Bad file descriptor)
[pid   307] exit_group(1)               = ?
[pid   307] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=307, si_uid=0, si_status=1, si_utime=0, si_stime=6 /* 0.06 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   26.46466