ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor3834782312

<...>


syzkaller
syzkaller login: [   14.603336][   T28] kauditd_printk_skb: 31 callbacks suppressed
[   14.603352][   T28] audit: type=1400 audit(1785811298.715:59): avc:  denied  { transition } for  pid=225 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
[   14.607786][   T28] audit: type=1400 audit(1785811298.715:60): avc:  denied  { noatsecure } for  pid=225 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   14.611690][   T28] audit: type=1400 audit(1785811298.725:61): avc:  denied  { write } for  pid=225 comm="sh" path="pipe:[14391]" dev="pipefs" ino=14391 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1
[   14.615109][   T28] audit: type=1400 audit(1785811298.725:62): avc:  denied  { rlimitinh } for  pid=225 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   14.617959][   T28] audit: type=1400 audit(1785811298.725:63): avc:  denied  { siginh } for  pid=225 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
Warning: Permanently added '10.128.0.55' (ED25519) to the list of known hosts.
execve("ci2-android-6-1/syz-executor3834782312", ["ci2-android-6-1/syz-executor3834782312"], 0x7ffc899e0900 /* 10 vars */) = 0
brk(NULL)                               = 0x555571614000
brk(0x555571614d40)                     = 0x555571614d40
arch_prctl(ARCH_SET_FS, 0x5555716143c0) = 0
set_tid_address(0x555571614690)         = 305
set_robust_list(0x5555716146a0, 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-executor3834782312", 4096) = 44
getrandom("\x1b\x1c\xf0\xbb\x0e\x94\x1d\x6c", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555571614d40
brk(0x555571635d40)                     = 0x555571635d40
brk(0x555571636000)                     = 0x555571636000
mprotect(0x7ff1feb66000, 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=0x555571614690) = 306
ci2-android-6-1/strace-static-x86_64: Process 306 attached
[pid   305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid   306] set_robust_list(0x5555716146a0, 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
[   30.278295][   T28] audit: type=1400 audit(1785811314.385:64): avc:  denied  { execmem } for  pid=305 comm="syz-executor383" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[   30.301215][   T28] audit: type=1400 audit(1785811314.415:65): avc:  denied  { mounton } for  pid=306 comm="syz-executor383" 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
[   30.334021][   T28] audit: type=1400 audit(1785811314.445:66): avc:  denied  { mounton } for  pid=306 comm="syz-executor383" 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
[   30.357050][   T28] audit: type=1400 audit(1785811314.445:67): avc:  denied  { mount } for  pid=306 comm="syz-executor383" 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\x00\x00\xac\x14\x14\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"}, 46) = 0
[pid   306] ioctl(3, SIOCGIFINDEX, NULL) = -1 EFAULT (Bad address)
[   30.366145][  T306] request_module fs-gadgetfs succeeded, but still no fs?
[   30.379691][   T28] audit: type=1400 audit(1785811314.445:68): avc:  denied  { mounton } for  pid=306 comm="syz-executor383" 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
[   30.410210][   T28] audit: type=1400 audit(1785811314.445:69): avc:  denied  { mount } for  pid=306 comm="syz-executor383" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1
[   30.432238][  T306] ==================================================================
[   30.432547][   T28] audit: type=1400 audit(1785811314.445:70): avc:  denied  { mounton } for  pid=306 comm="syz-executor383" 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
[   30.440321][  T306] BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0
[   30.466000][   T28] audit: type=1400 audit(1785811314.445:71): avc:  denied  { mounton } for  pid=306 comm="syz-executor383" path="/root/syz-tmp/newroot/proc/sys/fs/binfmt_misc" dev="proc" ino=14583 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:sysctl_fs_t tclass=dir permissive=1
[   30.472242][  T306] Write of size 8 at addr ffff8881103a7150 by task syz-executor383/306
[   30.472261][  T306] 
[   30.472279][  T306] CPU: 1 PID: 306 Comm: syz-executor383 Not tainted syzkaller #0
[   30.498913][   T28] audit: type=1400 audit(1785811314.445:72): avc:  denied  { unmount } for  pid=306 comm="syz-executor383" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1
[   30.506573][  T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[   30.506607][  T306] Call Trace:
[   30.509343][   T28] audit: type=1400 audit(1785811314.465:73): avc:  denied  { mounton } for  pid=306 comm="syz-executor383" path="/dev/gadgetfs" dev="devtmpfs" ino=570 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
[   30.516652][  T306]  <TASK>
[   30.516660][  T306]  __dump_stack+0x21/0x24
[   30.516690][  T306]  dump_stack_lvl+0x110/0x170
[   30.584338][  T306]  ? __cfi_dump_stack_lvl+0x8/0x8
[   30.589382][  T306]  ? mutex_lock+0x86/0x1b0
[   30.593820][  T306]  print_address_description+0x71/0x200
[   30.599375][  T306]  print_report+0x4a/0x60
[   30.603717][  T306]  kasan_report+0x122/0x150
[   30.608240][  T306]  ? mutex_lock+0x86/0x1b0
[   30.612684][  T306]  kasan_check_range+0x249/0x2a0
[   30.617648][  T306]  __kasan_check_write+0x14/0x20
[   30.622600][  T306]  mutex_lock+0x86/0x1b0
[   30.626864][  T306]  ? __cfi_mutex_lock+0x10/0x10
[   30.633293][  T306]  ? kfree+0x6f/0xf0
[   30.637211][  T306]  ? l2tp_session_put+0xaf/0x1a0
[   30.642162][  T306]  ? l2tp_session_delete+0x3df/0x4d0
[   30.647461][  T306]  pppol2tp_release+0x178/0x2b0
[   30.652327][  T306]  sock_close+0xc9/0x220
[   30.656585][  T306]  ? __cfi_sock_close+0x10/0x10
[   30.661455][  T306]  __fput+0x1fd/0x8f0
[   30.665452][  T306]  ____fput+0x15/0x20
[   30.669470][  T306]  task_work_run+0x1e1/0x250
[   30.674077][  T306]  ? __cfi_task_work_run+0x10/0x10
[   30.679204][  T306]  ptrace_notify+0x23f/0x270
[   30.683818][  T306]  ? __cfi_task_work_add+0x10/0x10
[   30.688942][  T306]  ? __cfi_ptrace_notify+0x10/0x10
[   30.694073][  T306]  ? fput+0x15b/0x1a0
[   30.698082][  T306]  ? filp_close+0x111/0x160
[   30.702599][  T306]  syscall_exit_work+0x84/0x140
[   30.707462][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   30.713633][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   30.719057][  T306]  do_syscall_64+0x58/0xa0
[   30.723509][  T306]  ? clear_bhb_loop+0x30/0x80
[   30.728209][  T306]  ? clear_bhb_loop+0x30/0x80
[   30.732904][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   30.738829][  T306] RIP: 0033:0x7ff1feae5557
[   30.743279][  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
[   30.762899][  T306] RSP: 002b:00007fffd57ae7c0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[   30.771332][  T306] RAX: 0000000000000000 RBX: 00005555716143c0 RCX: 00007ff1feae5557
[   30.779318][  T306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[   30.787323][  T306] RBP: 00007ff1feb3b126 R08: 0000000000000000 R09: 0000000000000000
[   30.795304][  T306] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ff1feb3cdf0
[   30.803290][  T306] R13: 00007ff1feb3b08e R14: 00007ff1feb66bc0 R15: 0000000000000002
[   30.811280][  T306]  </TASK>
[   30.814306][  T306] 
[   30.816638][  T306] Allocated by task 306:
[   30.820892][  T306]  kasan_set_track+0x4b/0x70
[   30.825513][  T306]  kasan_save_alloc_info+0x1f/0x30
[   30.830636][  T306]  __kasan_kmalloc+0x95/0xb0
[   30.835243][  T306]  __kmalloc+0xb4/0x1e0
[   30.839411][  T306]  l2tp_session_create+0x38/0xbd0
[   30.844453][  T306]  pppol2tp_connect+0xbf5/0x1640
[   30.849409][  T306]  __sys_connect+0x3da/0x460
[   30.854013][  T306]  __x64_sys_connect+0x7a/0x90
[   30.858813][  T306]  x64_sys_call+0x88d/0x9a0
[   30.863332][  T306]  do_syscall_64+0x4c/0xa0
[   30.867849][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   30.873787][  T306] 
[   30.876119][  T306] Freed by task 306:
[   30.880018][  T306]  kasan_set_track+0x4b/0x70
[   30.884628][  T306]  kasan_save_free_info+0x2b/0x40
[   30.889671][  T306]  ____kasan_slab_free+0x132/0x180
[   30.894810][  T306]  __kasan_slab_free+0x11/0x20
[   30.899606][  T306]  slab_free_freelist_hook+0xc2/0x190
[   30.904992][  T306]  __kmem_cache_free+0xb7/0x1b0
[   30.909862][  T306]  kfree+0x6f/0xf0
[   30.913594][  T306]  l2tp_session_put+0xaf/0x1a0
[   30.918367][  T306]  l2tp_session_delete+0x3df/0x4d0
[   30.923486][  T306]  pppol2tp_release+0x169/0x2b0
[   30.928349][  T306]  sock_close+0xc9/0x220
[   30.932610][  T306]  __fput+0x1fd/0x8f0
[   30.936612][  T306]  ____fput+0x15/0x20
[   30.940605][  T306]  task_work_run+0x1e1/0x250
[   30.945209][  T306]  ptrace_notify+0x23f/0x270
[   30.949818][  T306]  syscall_exit_work+0x84/0x140
[   30.954683][  T306]  syscall_exit_to_user_mode_prepare+0x1c/0x20
[   30.960851][  T306]  syscall_exit_to_user_mode+0xd/0x30
[   30.966255][  T306]  do_syscall_64+0x58/0xa0
[   30.970691][  T306]  entry_SYSCALL_64_after_hwframe+0x68/0xd2
[   30.976610][  T306] 
[   30.978952][  T306] The buggy address belongs to the object at ffff8881103a7000
[   30.978952][  T306]  which belongs to the cache kmalloc-512 of size 512
[   30.993011][  T306] The buggy address is located 336 bytes inside of
[   30.993011][  T306]  512-byte region [ffff8881103a7000, ffff8881103a7200)
[   31.006297][  T306] 
[   31.008630][  T306] The buggy address belongs to the physical page:
[   31.015067][  T306] page:ffffea000440e900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1103a4
[   31.025591][  T306] head:ffffea000440e900 order:2 compound_mapcount:0 compound_pincount:0
[   31.033938][  T306] flags: 0x4000000000010200(slab|head|zone=1)
[   31.040047][  T306] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00
[   31.048641][  T306] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[   31.057234][  T306] page dumped because: kasan: bad access detected
[   31.064350][  T306] page_owner tracks the page as allocated
[   31.070088][  T306] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 306, tgid 306 (syz-executor383), ts 30329476974, free_ts 24751721459
[   31.091546][  T306]  post_alloc_hook+0x1f5/0x210
[   31.096333][  T306]  prep_new_page+0x1c/0x110
[   31.100852][  T306]  get_page_from_freelist+0x2ca9/0x2d20
[   31.106415][  T306]  __alloc_pages+0x1fa/0x610
[   31.111022][  T306]  alloc_slab_page+0x6e/0xf0
[   31.115624][  T306]  new_slab+0x98/0x3e0
[   31.119703][  T306]  ___slab_alloc+0x70f/0xb70
[   31.124308][  T306]  __slab_alloc+0x5e/0xa0
[   31.128673][  T306]  __kmem_cache_alloc_node+0x204/0x2d0
[   31.134164][  T306]  kmalloc_trace+0x29/0xb0
[   31.138592][  T306]  inetdev_init+0x81/0x510
[   31.143036][  T306]  inetdev_event+0x1f4/0x10a0
[   31.147726][  T306]  raw_notifier_call_chain+0xa1/0x110
[   31.153105][  T306]  call_netdevice_notifiers+0x119/0x190
[   31.158662][  T306]  register_netdevice+0x1186/0x1550
[   31.163873][  T306]  register_netdev+0x3e/0x50
[   31.168484][  T306] page last free stack trace:
[   31.173164][  T306]  free_unref_page_prepare+0x80c/0x820
[   31.178638][  T306]  free_unref_page+0x93/0x530
[   31.183335][  T306]  __free_pages+0x67/0x100
[   31.187779][  T306]  __free_slab+0xc7/0x1a0
[   31.192125][  T306]  __unfreeze_partials+0x15a/0x190
[   31.197259][  T306]  put_cpu_partial+0xa9/0x100
[   31.201967][  T306]  __slab_free+0x1c4/0x280
[   31.206415][  T306]  ___cache_free+0xbf/0xd0
[   31.210857][  T306]  qlist_free_all+0xc6/0x140
[   31.215464][  T306]  kasan_quarantine_reduce+0x14a/0x170
[   31.220941][  T306]  __kasan_slab_alloc+0x24/0x80
[   31.225803][  T306]  slab_post_alloc_hook+0x4f/0x2d0
[   31.230955][  T306]  kmem_cache_alloc+0x166/0x320
[   31.235833][  T306]  jbd2__journal_start+0x13d/0x6e0
[   31.240989][  T306]  __ext4_journal_start_sb+0x242/0x4a0
[   31.246462][  T306]  ext4_dirty_inode+0x8f/0x100
[   31.251331][  T306] 
[   31.253666][  T306] Memory state around the buggy address:
[   31.259307][  T306]  ffff8881103a7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   31.267380][  T306]  ffff8881103a7080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   31.275449][  T306] >ffff8881103a7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[pid   306] close(3)                    = 0
[pid   306] close(4)                    = 0
[pid   306] close(5)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(6)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(7)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(8)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(9)                    = -1 EBADF (Bad file descriptor)
[pid   306] close(10)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(11)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(12)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(13)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(14)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(15)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(16)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(17)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(18)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(19)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(20)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(21)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(22)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(23)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(24)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(25)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(26)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(27)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(28)                   = -1 EBADF (Bad file descriptor)
[pid   306] close(29)                   = -1 EBADF (Bad file descriptor)
[pid   306] exit_group(1)               = ?
[pid   306] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=306, si_uid=0, si_status=1, si_utime=0, si_stime=7 /* 0.07 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   31.283519][  T306]