ci2-android-5-10/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-10/syz-executor1463389537 <...> Warning: Permanently added '10.128.0.113' (ED25519) to the list of known hosts. execve("ci2-android-5-10/syz-executor1463389537", ["ci2-android-5-10/syz-executor1463389537"], 0x7ffc6c7c2080 /* 10 vars */) = 0 brk(NULL) = 0x55557bfac000 brk(0x55557bfacd40) = 0x55557bfacd40 arch_prctl(ARCH_SET_FS, 0x55557bfac3c0) = 0 set_tid_address(0x55557bfac690) = 297 set_robust_list(0x55557bfac6a0, 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-5-10/syz-executor1463389537", 4096) = 45 getrandom("\xfd\xdd\xf6\xba\x09\xb4\xc2\x6e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557bfacd40 brk(0x55557bfcdd40) = 0x55557bfcdd40 brk(0x55557bfce000) = 0x55557bfce000 mprotect(0x7f35ff077000, 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 rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55557bfac690) = 298 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 write(3, "10000000000", 11) = 11 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 write(3, "20", 2) = 2 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 ci2-android-5-10/strace-static-x86_64: Process 298 attached [pid 297] write(3, "100", 3) = 3 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 298] set_robust_list(0x55557bfac6a0, 24 [pid 297] write(3, "0", 1) = 1 [pid 298] <... set_robust_list resumed>) = 0 [pid 297] close(3) = 0 [pid 298] rt_sigprocmask(SIG_SETMASK, [] [pid 297] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 298] <... rt_sigprocmask resumed>, NULL, 8) = 0 [pid 297] write(3, "0", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "7 4 1 3", 7) = 7 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "1", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "1", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/sys/kernel/debug/failslab/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "Y", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "Y", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/sys/kernel/debug/fail_futex/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "Y", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/sys/kernel/debug/fail_usercopy/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "Y", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/sys/kernel/debug/fail_make_request/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "Y", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/sys/kernel/debug/fail_io_timeout/task-filter", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "Y", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/sys/kernel/debug/fail_iommufd/task-filter", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "0", 1) = 1 [pid 297] close(3) = 0 [pid 297] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 297] write(3, "298", 3) = 3 [pid 297] close(3) = 0 [pid 297] kill(298, SIGKILL) = 0 [pid 298] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=298, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- getrandom("\x0e\x98\x2f\x2b\x26\x19\x8d\xda", 8, GRND_NONBLOCK) = 8 [ 25.095118][ T24] audit: type=1400 audit(1789295647.120:64): avc: denied { execmem } for pid=297 comm="syz-executor146" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 mkdir("./syzkaller.cGVkOD", 0700) = 0 chmod("./syzkaller.cGVkOD", 0777) = 0 chdir("./syzkaller.cGVkOD") = 0 write(1, "executing program\n", 18) = 18 executing program socket(AF_PPPOX, SOCK_STREAM, 1) = 3 socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP) = 4 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 [ 25.191654][ T24] audit: type=1400 audit(1789295647.220:65): avc: denied { create } for pid=297 comm="syz-executor146" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1 [ 25.216668][ T24] audit: type=1400 audit(1789295647.220:66): avc: denied { connect } for pid=297 comm="syz-executor146" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1 ioctl(3, BTRFS_IOC_SET_RECEIVED_SUBVOL, NULL) = -1 ENOTTY (Inappropriate ioctl for device) exit_group(0) = ? [ 25.245038][ T297] ================================================================== [ 25.254115][ T297] BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 [ 25.255707][ T24] audit: type=1400 audit(1789295647.280:67): avc: denied { ioctl } for pid=297 comm="syz-executor146" path="socket:[1666]" dev="sockfs" ino=1666 ioctlcmd=0x9425 scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1 [ 25.261240][ T297] Write of size 8 at addr ffff88810b454550 by task syz-executor146/297 [ 25.298164][ T297] [ 25.300714][ T297] CPU: 0 PID: 297 Comm: syz-executor146 Not tainted syzkaller #0 [ 25.308790][ T297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 25.319562][ T297] Call Trace: [ 25.322863][ T297] __dump_stack+0x21/0x24 [ 25.327996][ T297] dump_stack_lvl+0x1a7/0x208 [ 25.332928][ T297] ? show_regs_print_info+0x18/0x18 [ 25.338681][ T297] ? thaw_kernel_threads+0x220/0x220 [ 25.345318][ T297] print_address_description+0x7f/0x2c0 [ 25.351500][ T297] ? mutex_lock+0x85/0xf0 [ 25.356133][ T297] kasan_report+0x100/0x140 [ 25.360821][ T297] ? mutex_lock+0x85/0xf0 [ 25.365297][ T297] kasan_check_range+0x249/0x2a0 [ 25.370672][ T297] __kasan_check_write+0x14/0x20 [ 25.375660][ T297] mutex_lock+0x85/0xf0 [ 25.380618][ T297] ? mutex_trylock+0xb0/0xb0 [ 25.385584][ T297] ? l2tp_session_put+0xb2/0x1a0 [ 25.390690][ T297] ? l2tp_session_delete+0x3a9/0x4a0 [ 25.396057][ T297] pppol2tp_release+0x178/0x2b0 [ 25.401344][ T297] sock_close+0xb8/0x200 [ 25.405924][ T297] ? sock_mmap+0xa0/0xa0 [ 25.410386][ T297] __fput+0x2dc/0x730 [ 25.415316][ T297] ? _raw_spin_lock+0x94/0xf0 [ 25.420377][ T297] ____fput+0x15/0x20 [ 25.424361][ T297] task_work_run+0x127/0x190 [ 25.428950][ T297] do_exit+0xa7c/0x24e0 [ 25.433516][ T297] ? ptrace_notify+0x1ea/0x270 [ 25.438673][ T297] ? put_task_struct+0x90/0x90 [ 25.443458][ T297] ? do_notify_parent+0x810/0x810 [ 25.448497][ T297] do_group_exit+0x149/0x310 [ 25.453187][ T297] __x64_sys_exit_group+0x3f/0x40 [ 25.458382][ T297] do_syscall_64+0x31/0x40 [ 25.462884][ T297] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 25.469994][ T297] RIP: 0033:0x7f35fefe2a85 [ 25.474451][ T297] Code: Unable to access opcode bytes at RIP 0x7f35fefe2a5b. [ 25.482037][ T297] RSP: 002b:00007ffdd7b0dd88 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 25.492890][ T297] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f35fefe2a85 [ 25.502215][ T297] RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000000 [ 25.510472][ T297] RBP: 0000000000000000 R08: 0000000000000000 R09: 6c616b7a79732f2e [ 25.518447][ T297] R10: 6c616b7a79732f2e R11: 0000000000000206 R12: 0000000000000000 [ 25.526990][ T297] R13: 00007f35ff07c110 R14: 00007f35ff07e3a8 R15: 00007f35ff07e3c0 [ 25.535701][ T297] [ 25.538228][ T297] Allocated by task 297: [ 25.542495][ T297] __kasan_kmalloc+0xd4/0x100 [ 25.547450][ T297] __kmalloc+0x19f/0x330 [ 25.551690][ T297] l2tp_session_create+0x39/0xb60 [ 25.556847][ T297] pppol2tp_connect+0xbf5/0x1640 [ 25.561795][ T297] __sys_connect+0x3ce/0x450 [ 25.566388][ T297] __x64_sys_connect+0x7a/0x90 [ 25.571241][ T297] do_syscall_64+0x31/0x40 [ 25.577284][ T297] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 25.583706][ T297] [ 25.586305][ T297] Freed by task 297: [ 25.590320][ T297] kasan_set_track+0x4a/0x70 [ 25.595629][ T297] kasan_set_free_info+0x23/0x40 [ 25.602165][ T297] ____kasan_slab_free+0x125/0x160 [ 25.608414][ T297] __kasan_slab_free+0x11/0x20 [ 25.613552][ T297] slab_free_freelist_hook+0xc5/0x190 [ 25.619199][ T297] kfree+0xc0/0x270 [ 25.624167][ T297] l2tp_session_put+0xb2/0x1a0 [ 25.628944][ T297] l2tp_session_delete+0x3a9/0x4a0 [ 25.634257][ T297] pppol2tp_release+0x169/0x2b0 [ 25.639210][ T297] sock_close+0xb8/0x200 [ 25.643633][ T297] __fput+0x2dc/0x730 [ 25.647870][ T297] ____fput+0x15/0x20 [ 25.652072][ T297] task_work_run+0x127/0x190 [ 25.656836][ T297] do_exit+0xa7c/0x24e0 [ 25.661029][ T297] do_group_exit+0x149/0x310 [ 25.665963][ T297] __x64_sys_exit_group+0x3f/0x40 [ 25.671160][ T297] do_syscall_64+0x31/0x40 [ 25.676042][ T297] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 25.682447][ T297] [ 25.684799][ T297] The buggy address belongs to the object at ffff88810b454400 [ 25.684799][ T297] which belongs to the cache kmalloc-512 of size 512 [ 25.700261][ T297] The buggy address is located 336 bytes inside of [ 25.700261][ T297] 512-byte region [ffff88810b454400, ffff88810b454600) [ 25.714061][ T297] The buggy address belongs to the page: [ 25.720559][ T297] page:ffffea00042d1500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10b454 [ 25.731867][ T297] head:ffffea00042d1500 order:2 compound_mapcount:0 compound_pincount:0 [ 25.741491][ T297] flags: 0x4000000000010200(slab|head) [ 25.747351][ T297] raw: 4000000000010200 ffffea00042caf00 0000000500000005 ffff888100043080 [ 25.756136][ T297] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 25.765325][ T297] page dumped because: kasan: bad access detected [ 25.771829][ T297] page_owner tracks the page as allocated [ 25.777811][ T297] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 2452876033, free_ts 0 [ 25.797019][ T297] prep_new_page+0x176/0x190 [ 25.802014][ T297] get_page_from_freelist+0x225f/0x23f0 [ 25.807732][ T297] __alloc_pages_nodemask+0x29a/0x640 [ 25.813182][ T297] new_slab+0x84/0x3f0 [ 25.817276][ T297] ___slab_alloc+0x2f8/0x4c0 [ 25.822439][ T297] __slab_alloc+0x63/0xa0 [ 25.826950][ T297] kmem_cache_alloc_trace+0x1a8/0x2e0 [ 25.832320][ T297] alloc_desc+0x60/0x670 [ 25.836558][ T297] __irq_alloc_descs+0x232/0x440 [ 25.841605][ T297] irq_domain_alloc_irqs_locked+0x83/0xab0 [ 25.847816][ T297] __irq_domain_alloc_irqs+0x6b/0xb0 [ 25.853365][ T297] __msi_domain_alloc_irqs+0x333/0x1030 [ 25.858994][ T297] msi_domain_alloc_irqs+0x86/0xa0 [ 25.864097][ T297] __pci_enable_msix_range+0xe2d/0x1640 [ 25.869757][ T297] pci_alloc_irq_vectors_affinity+0x12b/0x2e0 [ 25.876195][ T297] vp_find_vqs_msix+0x43e/0xe80 [ 25.883459][ T297] page_owner free stack trace missing [ 25.889804][ T297] [ 25.892393][ T297] Memory state around the buggy address: [ 25.898029][ T297] ffff88810b454400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.906872][ T297] ffff88810b454480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.916075][ T297] >ffff88810b454500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.925265][ T297] ^ [ 25.932369][ T297] ffff88810b454580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb +++ exited with 0 +++ [ 25.940713][ T297] ffff88810b454600: fc fc fc fc fc fc fc fc fc fc fc fc fc f