ci2-android-5-10/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-10/syz-executor3906343698 <...> ocess permissive=1 [ 15.693020][ T24] audit: type=1400 audit(1788171242.350:63): avc: denied { siginh } for pid=217 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.176' (ED25519) to the list of known hosts. execve("ci2-android-5-10/syz-executor3906343698", ["ci2-android-5-10/syz-executor3906343698"], 0x7ffcf4dc4e90 /* 10 vars */) = 0 brk(NULL) = 0x555558e2e000 brk(0x555558e2ed40) = 0x555558e2ed40 arch_prctl(ARCH_SET_FS, 0x555558e2e3c0) = 0 set_tid_address(0x555558e2e690) = 297 set_robust_list(0x555558e2e6a0, 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-executor3906343698", 4096) = 45 getrandom("\x23\xf8\xc7\x64\x97\x3f\xce\x2c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555558e2ed40 brk(0x555558e4fd40) = 0x555558e4fd40 brk(0x555558e50000) = 0x555558e50000 mprotect(0x7f517b67d000, 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 executing program write(1, "executing program\n", 18) = 18 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\x00\x00\x00\x00\x00\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 ioctl(3, FS_IOC_GET_ENCRYPTION_POLICY, 0) = -1 ENOTTY (Inappropriate ioctl for device) exit_group(0) = ? [ 26.065622][ T24] audit: type=1400 audit(1788171252.750:64): avc: denied { execmem } for pid=297 comm="syz-executor390" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 26.085759][ T24] audit: type=1400 audit(1788171252.750:65): avc: denied { create } for pid=297 comm="syz-executor390" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1 [ 26.105829][ T297] ================================================================== [ 26.106842][ T24] audit: type=1400 audit(1788171252.750:66): avc: denied { connect } for pid=297 comm="syz-executor390" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1 [ 26.113949][ T297] BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 [ 26.113993][ T297] Write of size 8 at addr ffff88810ae5b150 by task syz-executor390/297 [ 26.134590][ T24] audit: type=1400 audit(1788171252.780:67): avc: denied { ioctl } for pid=297 comm="syz-executor390" path="socket:[13165]" dev="sockfs" ino=13165 ioctlcmd=0x6615 scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1 [ 26.140437][ T297] [ 26.140462][ T297] CPU: 0 PID: 297 Comm: syz-executor390 Not tainted syzkaller #0 [ 26.140468][ T297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 26.140481][ T297] Call Trace: [ 26.197037][ T297] __dump_stack+0x21/0x24 [ 26.201367][ T297] dump_stack_lvl+0x1a7/0x208 [ 26.206090][ T297] ? show_regs_print_info+0x18/0x18 [ 26.211296][ T297] ? thaw_kernel_threads+0x220/0x220 [ 26.216579][ T297] print_address_description+0x7f/0x2c0 [ 26.222144][ T297] ? mutex_lock+0x85/0xf0 [ 26.226470][ T297] kasan_report+0x100/0x140 [ 26.230973][ T297] ? mutex_lock+0x85/0xf0 [ 26.235322][ T297] kasan_check_range+0x249/0x2a0 [ 26.240265][ T297] __kasan_check_write+0x14/0x20 [ 26.245200][ T297] mutex_lock+0x85/0xf0 [ 26.249378][ T297] ? mutex_trylock+0xb0/0xb0 [ 26.253983][ T297] ? l2tp_session_put+0xb2/0x1a0 [ 26.258925][ T297] ? l2tp_session_delete+0x3a9/0x4a0 [ 26.264204][ T297] pppol2tp_release+0x178/0x2b0 [ 26.269052][ T297] sock_close+0xb8/0x200 [ 26.273291][ T297] ? sock_mmap+0xa0/0xa0 [ 26.277530][ T297] __fput+0x2dc/0x730 [ 26.281506][ T297] ? _raw_spin_lock+0x94/0xf0 [ 26.286197][ T297] ____fput+0x15/0x20 [ 26.290188][ T297] task_work_run+0x127/0x190 [ 26.294771][ T297] do_exit+0xa7c/0x24e0 [ 26.298922][ T297] ? ptrace_notify+0x1ea/0x270 [ 26.303680][ T297] ? put_task_struct+0x90/0x90 [ 26.308462][ T297] ? do_notify_parent+0x810/0x810 [ 26.313483][ T297] do_group_exit+0x149/0x310 [ 26.318067][ T297] __x64_sys_exit_group+0x3f/0x40 [ 26.323087][ T297] do_syscall_64+0x31/0x40 [ 26.327500][ T297] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 26.333387][ T297] RIP: 0033:0x7f517b5ec305 [ 26.337797][ T297] Code: Unable to access opcode bytes at RIP 0x7f517b5ec2db. [ 26.345158][ T297] RSP: 002b:00007ffe6040afb8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 26.353563][ T297] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f517b5ec305 [ 26.361863][ T297] RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000000 [ 26.369858][ T297] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe6040b148 [ 26.377834][ T297] R10: 00007ffe6040b148 R11: 0000000000000206 R12: 0000000000000000 [ 26.385945][ T297] R13: 00007f517b682110 R14: 00007f517b6843a8 R15: 00007f517b6843c0 [ 26.393924][ T297] [ 26.396249][ T297] Allocated by task 297: [ 26.400516][ T297] __kasan_kmalloc+0xd4/0x100 [ 26.405202][ T297] __kmalloc+0x19f/0x330 [ 26.409735][ T297] l2tp_session_create+0x39/0xb60 [ 26.414766][ T297] pppol2tp_connect+0xbf5/0x1640 [ 26.419799][ T297] __sys_connect+0x3ce/0x450 [ 26.424392][ T297] __x64_sys_connect+0x7a/0x90 [ 26.429158][ T297] do_syscall_64+0x31/0x40 [ 26.433595][ T297] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 26.439581][ T297] [ 26.441905][ T297] Freed by task 297: [ 26.445971][ T297] kasan_set_track+0x4a/0x70 [ 26.450568][ T297] kasan_set_free_info+0x23/0x40 [ 26.455507][ T297] ____kasan_slab_free+0x125/0x160 [ 26.460641][ T297] __kasan_slab_free+0x11/0x20 [ 26.465401][ T297] slab_free_freelist_hook+0xc5/0x190 [ 26.471118][ T297] kfree+0xc0/0x270 [ 26.474938][ T297] l2tp_session_put+0xb2/0x1a0 [ 26.479701][ T297] l2tp_session_delete+0x3a9/0x4a0 [ 26.484822][ T297] pppol2tp_release+0x169/0x2b0 [ 26.489674][ T297] sock_close+0xb8/0x200 [ 26.493914][ T297] __fput+0x2dc/0x730 [ 26.498043][ T297] ____fput+0x15/0x20 [ 26.502032][ T297] task_work_run+0x127/0x190 [ 26.506635][ T297] do_exit+0xa7c/0x24e0 [ 26.510797][ T297] do_group_exit+0x149/0x310 [ 26.515386][ T297] __x64_sys_exit_group+0x3f/0x40 [ 26.520411][ T297] do_syscall_64+0x31/0x40 [ 26.524843][ T297] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 26.530761][ T297] [ 26.533084][ T297] Last potentially related work creation: [ 26.538819][ T297] kasan_save_stack+0x3a/0x60 [ 26.543493][ T297] __kasan_record_aux_stack+0xd2/0x100 [ 26.548945][ T297] kasan_record_aux_stack_noalloc+0xb/0x10 [ 26.554830][ T297] call_rcu+0x11a/0x1090 [ 26.559083][ T297] blkg_release+0x23/0x30 [ 26.563416][ T297] percpu_ref_switch_to_atomic_rcu+0x5a3/0x5b0 [ 26.569576][ T297] rcu_do_batch+0x488/0xaf0 [ 26.574236][ T297] rcu_core+0x50a/0xca0 [ 26.578406][ T297] rcu_core_si+0x9/0x10 [ 26.582661][ T297] __do_softirq+0x255/0x563 [ 26.587174][ T297] [ 26.589530][ T297] The buggy address belongs to the object at ffff88810ae5b000 [ 26.589530][ T297] which belongs to the cache kmalloc-512 of size 512 [ 26.603603][ T297] The buggy address is located 336 bytes inside of [ 26.603603][ T297] 512-byte region [ffff88810ae5b000, ffff88810ae5b200) [ 26.616884][ T297] The buggy address belongs to the page: [ 26.622550][ T297] page:ffffea00042b9600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10ae58 [ 26.632821][ T297] head:ffffea00042b9600 order:2 compound_mapcount:0 compound_pincount:0 [ 26.641160][ T297] flags: 0x4000000000010200(slab|head) [ 26.646662][ T297] raw: 4000000000010200 ffffea00042b4900 0000000600000006 ffff888100043080 [ 26.655259][ T297] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 26.663996][ T297] page dumped because: kasan: bad access detected [ 26.670539][ T297] page_owner tracks the page as allocated [ 26.676292][ 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 2519701411, free_ts 0 [ 26.694192][ T297] prep_new_page+0x176/0x190 [ 26.698790][ T297] get_page_from_freelist+0x225f/0x23f0 [ 26.704348][ T297] __alloc_pages_nodemask+0x29a/0x640 [ 26.709727][ T297] new_slab+0x84/0x3f0 [ 26.713804][ T297] ___slab_alloc+0x2f8/0x4c0 [ 26.718401][ T297] __slab_alloc+0x63/0xa0 [ 26.722777][ T297] kmem_cache_alloc_trace+0x1a8/0x2e0 [ 26.728159][ T297] blkg_alloc+0x6d/0x570 [ 26.732415][ T297] blkcg_init_queue+0x2d/0x330 [ 26.737212][ T297] blk_alloc_queue+0x444/0x5f0 [ 26.741984][ T297] blk_mq_init_queue+0x37/0xd0 [ 26.746754][ T297] scsi_mq_alloc_queue+0x42/0x140 [ 26.751786][ T297] scsi_alloc_sdev+0x611/0x920 [ 26.756558][ T297] scsi_probe_and_add_lun+0x17d/0x3370 [ 26.762023][ T297] __scsi_scan_target+0x1d2/0xbf0 [ 26.767074][ T297] scsi_scan_host_selected+0x34e/0x600 [ 26.772544][ T297] page_owner free stack trace missing [ 26.777925][ T297] [ 26.780287][ T297] Memory state around the buggy address: [ 26.786058][ T297] ffff88810ae5b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.794151][ T297] ffff88810ae5b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.802228][ T297] >ffff88810ae5b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.810299][ T297] ^ +++ exited with 0 +++ [ 26.816982][ T297]