ci2-android-5-15/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-15/syz-executor745153814
<...>
Warning: Permanently added '10.128.1.80' (ED25519) to the list of known hosts.
execve("ci2-android-5-15/syz-executor745153814", ["ci2-android-5-15/syz-executor745153814"], 0x7ffef18f13f0 /* 10 vars */) = 0
brk(NULL) = 0x555567cc7000
brk(0x555567cc7d40) = 0x555567cc7d40
arch_prctl(ARCH_SET_FS, 0x555567cc73c0) = 0
set_tid_address(0x555567cc7690) = 304
set_robust_list(0x555567cc76a0, 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-5-15/syz-executor745153814", 4096) = 44
getrandom("\xd3\xca\x8f\x73\x05\x67\xee\x70", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555567cc7d40
brk(0x555567ce8d40) = 0x555567ce8d40
brk(0x555567ce9000) = 0x555567ce9000
mprotect(0x7fd7f59c7000, 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\x00\x00\x00\x00\x04\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x20\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00"}, 50) = 0
sendfile(-1, -1, [3], 2757) = -1 EBADF (Bad file descriptor)
clone3({flags=CLONE_UNTRACED|CLONE_CHILD_SETTID|CLONE_NEWCGROUP|CLONE_NEWPID, child_tid=NULL, exit_signal=SIGRT_7, stack=NULL, stack_size=0, cgroup=4294967295}, 88) = 305
ioctl(3, PPPIOCSMRU, 0) = -1 ENOSYS (Function not implemented)
exit_group(0) = ?
+++ exited with 0 +++
[ 32.859877][ T30] audit: type=1400 audit(1785895370.422:64): avc: denied { execmem } for pid=304 comm="syz-executor745" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[ 32.879812][ T30] audit: type=1400 audit(1785895370.422:65): avc: denied { create } for pid=304 comm="syz-executor745" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 32.900794][ T30] audit: type=1400 audit(1785895370.422:66): avc: denied { connect } for pid=304 comm="syz-executor745" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 32.921124][ T30] audit: type=1400 audit(1785895370.442:67): avc: denied { ioctl } for pid=304 comm="syz-executor745" path="socket:[14789]" dev="sockfs" ino=14789 ioctlcmd=0x7452 scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 33.051661][ T305] ==================================================================
[ 33.059766][ T305] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0
[ 33.068103][ T305] Read of size 4 at addr ffff888100bf9800 by task syz-executor745/305
[ 33.076359][ T305]
[ 33.078677][ T305] CPU: 0 PID: 305 Comm: syz-executor745 Not tainted syzkaller #0
[ 33.086528][ T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 33.096590][ T305] Call Trace:
[ 33.099904][ T305]
[ 33.102855][ T305] __dump_stack+0x21/0x30
[ 33.107432][ T305] dump_stack_lvl+0x110/0x170
[ 33.112203][ T305] ? show_regs_print_info+0x20/0x20
[ 33.119088][ T305] ? load_image+0x3f0/0x3f0
[ 33.123596][ T305] ? __local_bh_enable_ip+0x58/0x80
[ 33.128789][ T305] print_address_description+0x7f/0x2c0
[ 33.134449][ T305] ? pppol2tp_sock_to_session+0x1a0/0x1b0
[ 33.140559][ T305] kasan_report+0x10f/0x150
[ 33.145236][ T305] ? pppol2tp_sock_to_session+0x1a0/0x1b0
[ 33.150973][ T305] __asan_report_load4_noabort+0x14/0x20
[ 33.156693][ T305] pppol2tp_sock_to_session+0x1a0/0x1b0
[ 33.162316][ T305] pppol2tp_release+0x150/0x2b0
[ 33.167164][ T305] sock_close+0xb8/0x200
[ 33.171400][ T305] ? sock_mmap+0xa0/0xa0
[ 33.175651][ T305] __fput+0x22b/0x900
[ 33.179735][ T305] ____fput+0x15/0x20
[ 33.183699][ T305] task_work_run+0x127/0x190
[ 33.188276][ T305] do_exit+0xb70/0x29a0
[ 33.192421][ T305] ? __se_sys_clock_nanosleep+0x30b/0x3a0
[ 33.198310][ T305] ? put_task_struct+0x90/0x90
[ 33.203148][ T305] ? __kasan_check_write+0x14/0x20
[ 33.208257][ T305] __x64_sys_exit+0x40/0x40
[ 33.212893][ T305] x64_sys_call+0x44/0x9a0
[ 33.217302][ T305] do_syscall_64+0x4c/0xa0
[ 33.221933][ T305] ? clear_bhb_loop+0x50/0xa0
[ 33.226659][ T305] ? clear_bhb_loop+0x50/0xa0
[ 33.231370][ T305] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 33.237275][ T305] RIP: 0033:0x7fd7f5936d79
[ 33.241693][ T305] Code: Unable to access opcode bytes at RIP 0x7fd7f5936d4f.
[ 33.249079][ T305] RSP: 002b:00007ffd16b608b8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
[ 33.257578][ T305] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007fd7f5936d79
[ 33.265554][ T305] RDX: 00007fd7f5948557 RSI: 0000000000000000 RDI: 0000000000000000
[ 33.273619][ T305] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000023800000
[ 33.281961][ T305] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd16b60ad8
[ 33.289956][ T305] R13: 0000000000000002 R14: 00007fd7f59c7ca0 R15: 0000000000000002
[ 33.298131][ T305]
[ 33.301340][ T305]
[ 33.303664][ T305] Allocated by task 304:
[ 33.307917][ T305] __kasan_kmalloc+0xd4/0x100
[ 33.312604][ T305] __kmalloc+0x13d/0x2c0
[ 33.317458][ T305] l2tp_session_create+0x39/0xb60
[ 33.322615][ T305] pppol2tp_connect+0xbf5/0x1640
[ 33.327618][ T305] __sys_connect+0x3cb/0x450
[ 33.332205][ T305] __x64_sys_connect+0x7a/0x90
[ 33.336967][ T305] x64_sys_call+0x7c/0x9a0
[ 33.341392][ T305] do_syscall_64+0x4c/0xa0
[ 33.345827][ T305] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 33.351725][ T305]
[ 33.354049][ T305] Freed by task 8:
[ 33.357761][ T305] kasan_set_track+0x4a/0x70
[ 33.362351][ T305] kasan_set_free_info+0x23/0x40
[ 33.367314][ T305] ____kasan_slab_free+0x125/0x160
[ 33.372425][ T305] __kasan_slab_free+0x11/0x20
[ 33.377702][ T305] slab_free_freelist_hook+0xc2/0x190
[ 33.383073][ T305] kfree+0xc4/0x270
[ 33.386968][ T305] l2tp_session_put+0xaf/0x1a0
[ 33.391728][ T305] l2tp_session_delete+0x3a9/0x4a0
[ 33.396841][ T305] l2tp_tunnel_del_work+0x180/0x3d0
[ 33.402126][ T305] process_one_work+0x6c8/0xbb0
[ 33.406983][ T305] worker_thread+0xaa0/0x1250
[ 33.411767][ T305] kthread+0x3f5/0x4f0
[ 33.416114][ T305] ret_from_fork+0x1f/0x30
[ 33.420535][ T305]
[ 33.422942][ T305] Last potentially related work creation:
[ 33.428751][ T305] kasan_save_stack+0x3a/0x60
[ 33.433429][ T305] __kasan_record_aux_stack+0xd2/0x100
[ 33.438881][ T305] kasan_record_aux_stack_noalloc+0xb/0x10
[ 33.444680][ T305] call_rcu+0x10b/0xf60
[ 33.448839][ T305] blkg_release+0x23/0x30
[ 33.453694][ T305] percpu_ref_switch_to_atomic_rcu+0x611/0x620
[ 33.459844][ T305] rcu_do_batch+0x4c1/0xbf0
[ 33.464340][ T305] rcu_core+0x4a3/0xef0
[ 33.468505][ T305] rcu_core_si+0x9/0x10
[ 33.472660][ T305] handle_softirqs+0x250/0x560
[ 33.477419][ T305] run_ksoftirqd+0x28/0x40
[ 33.481935][ T305] smpboot_thread_fn+0x446/0x880
[ 33.486956][ T305] kthread+0x3f5/0x4f0
[ 33.491109][ T305] ret_from_fork+0x1f/0x30
[ 33.495525][ T305]
[ 33.497846][ T305] The buggy address belongs to the object at ffff888100bf9800
[ 33.497846][ T305] which belongs to the cache kmalloc-512 of size 512
[ 33.511900][ T305] The buggy address is located 0 bytes inside of
[ 33.511900][ T305] 512-byte region [ffff888100bf9800, ffff888100bf9a00)
[ 33.525009][ T305] The buggy address belongs to the page:
[ 33.530635][ T305] page:ffffea000402fe00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100bf8
[ 33.540873][ T305] head:ffffea000402fe00 order:2 compound_mapcount:0 compound_pincount:0
[ 33.549288][ T305] flags: 0x4000000000010200(slab|head|zone=1)
[ 33.555445][ T305] raw: 4000000000010200 ffffea000402fd00 0000000200000002 ffff888100042f00
[ 33.564026][ T305] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 33.572605][ T305] page dumped because: kasan: bad access detected
[ 33.579796][ T305] page_owner tracks the page as allocated
[ 33.585790][ 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 1, ts 2283997190, free_ts 0
[ 33.603968][ T305] post_alloc_hook+0x192/0x1b0
[ 33.608823][ T305] prep_new_page+0x1c/0x110
[ 33.613335][ T305] get_page_from_freelist+0x2c3a/0x2cd0
[ 33.618903][ T305] __alloc_pages+0x1a2/0x460
[ 33.623515][ T305] new_slab+0xa0/0x4d0
[ 33.627582][ T305] ___slab_alloc+0x3ac/0x840
[ 33.632169][ T305] __slab_alloc+0x49/0x90
[ 33.636498][ T305] kmem_cache_alloc_trace+0x146/0x270
[ 33.641870][ T305] blkg_alloc+0x82/0x5d0
[ 33.646334][ T305] blkcg_init_queue+0x29/0x210
[ 33.651260][ T305] blk_alloc_queue+0x3be/0x550
[ 33.656034][ T305] blk_mq_init_queue+0x37/0xd0
[ 33.660984][ T305] scsi_alloc_sdev+0x66c/0x9c0
[ 33.665749][ T305] scsi_probe_and_add_lun+0x180/0x35d0
[ 33.671341][ T305] __scsi_scan_target+0x1d2/0xb70
[ 33.676629][ T305] scsi_scan_host_selected+0x34e/0x600
[ 33.682118][ T305] page_owner free stack trace missing
[ 33.687481][ T305]
[ 33.689798][ T305] Memory state around the buggy address:
[ 33.695422][ T305] ffff888100bf9700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 33.703475][ T305] ffff888100bf9780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 33.711539][ T305] >ffff888100bf9800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 33.719592][ T305] ^
[ 33.723651][ T305] ffff888100bf9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 33.731798][ T305] ffff888100bf9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 33.739935][ T305] ==================================================================
[ 33.748000][ T305] Disabling lock debugging due to kernel taint
[ 33.754508][ T305] ------------[ cut here ]------------
[ 33.758989][ T30] audit: type=1400 audit(1785895371.312:68): avc: denied { read } for pid=83 comm="syslogd" name="log" dev="sda1" ino=2010 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1
[ 33.760024][ T305] WARNING: CPU: 1 PID: 305 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0
[ 33.783007][ T30] audit: type=1400 audit(1785895371.312:69): avc: denied { search } for pid=83 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1
[ 33.791757][ T305] Modules linked in:
[ 33.813129][ T30] audit: type=1400 audit(1785895371.312:70): avc: denied { write } for pid=83 comm="syslogd" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1
[ 33.816858][ T305] CPU: 1 PID: 305 Comm: syz-executor745 Tainted: G B syzkaller #0
[ 33.838090][ T30] audit: type=1400 audit(1785895371.312:71): avc: denied { add_name } for pid=83 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1
[ 33.847139][ T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 33.869186][ T30] audit: type=1400 audit(1785895371.312:72): avc: denied { create } for pid=83 comm="syslogd" name="messages" scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1
[ 33.879113][ T305] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0
[ 33.899755][ T30] audit: type=1400 audit(1785895371.312:73): avc: denied { append open } for pid=83 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=5 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1
[ 33.906209][ T305] Code: 5d c3 e8 9c 83 0b fd be 02 00 00 00 eb 0a e8 90 83 0b fd be 01 00 00 00 4c 89 f7 e8 33 02 f2 fd e9 0f ff ff ff e8 79 83 0b fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 68 83 0b fd 4c 89 f7 be 03
[ 33.949025][ T305] RSP: 0018:ffffc900007b7bf0 EFLAGS: 00010293
[ 33.955195][ T305] RAX: ffffffff845e3367 RBX: ffff8881065b0000 RCX: ffff8881049ee2c0
[ 33.963208][ T305] RDX: 0000000000000000 RSI: 0000000025672c80 RDI: 000000000c04eb7d
[ 33.971202][ T305] RBP: ffffc900007b7c10 R08: 0000000000000003 R09: 0000000000000004
[ 33.979607][ T305] R10: dffffc0000000000 R11: fffffbfff0e18e4c R12: dffffc0000000000
[ 33.987606][ T305] R13: dffffc0000000000 R14: 0000000025672c80 R15: ffff888100bf9800
[ 33.995607][ T305] FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
[ 34.004538][ T305] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 34.012197][ T305] CR2: 00000000006aa5b0 CR3: 000000000660f000 CR4: 00000000003506a0
[ 34.020191][ T305] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 34.028361][ T305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 34.036702][ T305] Call Trace:
[ 34.039974][ T305]
[ 34.042917][ T305] pppol2tp_release+0x150/0x2b0
[ 34.048514][ T305] sock_close+0xb8/0x200
[ 34.053008][ T305] ? sock_mmap+0xa0/0xa0
[ 34.057383][ T305] __fput+0x22b/0x900
[ 34.061392][ T305] ____fput+0x15/0x20
[ 34.065431][ T305] task_work_run+0x127/0x190
[ 34.070056][ T305] do_exit+0xb70/0x29a0
[ 34.074210][ T305] ? __se_sys_clock_nanosleep+0x30b/0x3a0
[ 34.079957][ T305] ? put_task_struct+0x90/0x90
[ 34.084745][ T305] ? __kasan_check_write+0x14/0x20
[ 34.090211][ T305] __x64_sys_exit+0x40/0x40
[ 34.094827][ T305] x64_sys_call+0x44/0x9a0
[ 34.099319][ T305] do_syscall_64+0x4c/0xa0
[ 34.103841][ T305] ? clear_bhb_loop+0x50/0xa0
[ 34.108553][ T305] ? clear_bhb_loop+0x50/0xa0
[ 34.113243][ T305] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 34.119160][ T305] RIP: 0033:0x7fd7f5936d79
[ 34.123578][ T305] Code: Unable to access opcode bytes at RIP 0x7fd7f5936d4f.
[ 34.130957][ T305] RSP: 002b:00007ffd16b608b8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
[ 34.139391][ T305] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007fd7f5936d79
[ 34.147389][ T305] RDX: 00007fd7f5948557 RSI: 0000000000000000 RDI: 0000000000000000
[ 34.15538