ci2-android-5-15/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-15/syz-executor3558826222
<...>
rocess permissive=1
[ 11.322491][ T30] audit: type=1400 audit(1788031232.152:63): avc: denied { siginh } for pid=222 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
Warning: Permanently added '10.128.1.113' (ED25519) to the list of known hosts.
execve("ci2-android-5-15/syz-executor3558826222", ["ci2-android-5-15/syz-executor3558826222"], 0x7ffc8391ebc0 /* 10 vars */) = 0
brk(NULL) = 0x555558306000
brk(0x555558306d40) = 0x555558306d40
arch_prctl(ARCH_SET_FS, 0x5555583063c0) = 0
set_tid_address(0x555558306690) = 303
set_robust_list(0x5555583066a0, 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-executor3558826222", 4096) = 45
getrandom("\xf7\xb9\xe1\x5a\x41\x57\x00\xb1", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555558306d40
brk(0x555558327d40) = 0x555558327d40
brk(0x555558328000) = 0x555558328000
mprotect(0x7fbf78f95000, 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
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\x00\x00\x00\x00\x04\x00\x00\x00\x06\x00\x00\x00\x00\x00\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa\x00\x00\x00\x00"}, 50) = 0
ioctl(3, SIOCGIFINDEX, NULL) = -1 EFAULT (Bad address)
exit_group(0) = ?
[ 20.931027][ T30] audit: type=1400 audit(1788031241.772:64): avc: denied { execmem } for pid=303 comm="syz-executor355" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[ 20.934448][ T30] audit: type=1400 audit(1788031241.782:65): avc: denied { create } for pid=303 comm="syz-executor355" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 20.937163][ T30] audit: type=1400 audit(1788031241.782:66): avc: denied { connect } for pid=303 comm="syz-executor355" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 20.940369][ T30] audit: type=1400 audit(1788031241.782:67): avc: denied { ioctl } for pid=303 comm="syz-executor355" path="socket:[14931]" dev="sockfs" ino=14931 ioctlcmd=0x8933 scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 20.945659][ T303] ==================================================================
[ 20.946778][ T303] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0
[ 20.948028][ T303] Read of size 4 at addr ffff88810ada0c00 by task syz-executor355/303
[ 20.949293][ T303]
[ 20.949647][ T303] CPU: 1 PID: 303 Comm: syz-executor355 Not tainted syzkaller #0
[ 20.950691][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 20.958321][ T303] Call Trace:
[ 20.961609][ T303]
[ 20.964517][ T303] __dump_stack+0x21/0x30
[ 20.968843][ T303] dump_stack_lvl+0x110/0x170
[ 20.973495][ T303] ? show_regs_print_info+0x20/0x20
[ 20.978679][ T303] ? load_image+0x3f0/0x3f0
[ 20.983157][ T303] ? __local_bh_enable_ip+0x58/0x80
[ 20.988332][ T303] print_address_description+0x7f/0x2c0
[ 20.993851][ T303] ? pppol2tp_sock_to_session+0x1a0/0x1b0
[ 20.999551][ T303] kasan_report+0x10f/0x150
[ 21.004062][ T303] ? pppol2tp_sock_to_session+0x1a0/0x1b0
[ 21.009763][ T303] __asan_report_load4_noabort+0x14/0x20
[ 21.015384][ T303] pppol2tp_sock_to_session+0x1a0/0x1b0
[ 21.020936][ T303] pppol2tp_release+0x150/0x2b0
[ 21.025775][ T303] sock_close+0xb8/0x200
[ 21.030018][ T303] ? sock_mmap+0xa0/0xa0
[ 21.034236][ T303] __fput+0x22b/0x900
[ 21.038191][ T303] ____fput+0x15/0x20
[ 21.042161][ T303] task_work_run+0x127/0x190
[ 21.046753][ T303] do_exit+0xb70/0x29a0
[ 21.050889][ T303] ? ptrace_stop+0x6d8/0xa70
[ 21.055468][ T303] ? put_task_struct+0x90/0x90
[ 21.060220][ T303] ? ptrace_notify+0x1ea/0x270
[ 21.065074][ T303] ? do_notify_parent+0x830/0x830
[ 21.070080][ T303] do_group_exit+0x149/0x310
[ 21.074655][ T303] __x64_sys_exit_group+0x3f/0x40
[ 21.079675][ T303] x64_sys_call+0x832/0x9a0
[ 21.084167][ T303] do_syscall_64+0x4c/0xa0
[ 21.088591][ T303] ? clear_bhb_loop+0x50/0xa0
[ 21.093246][ T303] ? clear_bhb_loop+0x50/0xa0
[ 21.097902][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 21.103789][ T303] RIP: 0033:0x7fbf78f04345
[ 21.108178][ T303] Code: Unable to access opcode bytes at RIP 0x7fbf78f0431b.
[ 21.115516][ T303] RSP: 002b:00007ffea9682768 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
[ 21.123916][ T303] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fbf78f04345
[ 21.131878][ T303] RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000000
[ 21.139825][ T303] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffea96828f8
[ 21.147780][ T303] R10: 000000000000000a R11: 0000000000000202 R12: 0000000000000000
[ 21.155728][ T303] R13: 00007fbf78f9a110 R14: 00007fbf78f9c3a8 R15: 00007fbf78f9c3c0
[ 21.163681][ T303]
[ 21.166678][ T303]
[ 21.168976][ T303] Allocated by task 303:
[ 21.173276][ T303] __kasan_kmalloc+0xd4/0x100
[ 21.178046][ T303] __kmalloc+0x13d/0x2c0
[ 21.182283][ T303] l2tp_session_create+0x39/0xb60
[ 21.187293][ T303] pppol2tp_connect+0xbf5/0x1640
[ 21.192208][ T303] __sys_connect+0x3cb/0x450
[ 21.196770][ T303] __x64_sys_connect+0x7a/0x90
[ 21.202635][ T303] x64_sys_call+0x7c/0x9a0
[ 21.207034][ T303] do_syscall_64+0x4c/0xa0
[ 21.211426][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 21.217291][ T303]
[ 21.219589][ T303] Freed by task 45:
[ 21.223363][ T303] kasan_set_track+0x4a/0x70
[ 21.227925][ T303] kasan_set_free_info+0x23/0x40
[ 21.232839][ T303] ____kasan_slab_free+0x125/0x160
[ 21.237924][ T303] __kasan_slab_free+0x11/0x20
[ 21.242660][ T303] slab_free_freelist_hook+0xc2/0x190
[ 21.248008][ T303] kfree+0xc4/0x270
[ 21.251792][ T303] l2tp_session_put+0xaf/0x1a0
[ 21.256530][ T303] l2tp_session_delete+0x3a9/0x4a0
[ 21.261614][ T303] l2tp_tunnel_del_work+0x180/0x3d0
[ 21.266785][ T303] process_one_work+0x6c8/0xbb0
[ 21.271612][ T303] worker_thread+0xaa0/0x1250
[ 21.276261][ T303] kthread+0x3f5/0x4f0
[ 21.280304][ T303] ret_from_fork+0x1f/0x30
[ 21.284694][ T303]
[ 21.286992][ T303] Last potentially related work creation:
[ 21.292694][ T303] kasan_save_stack+0x3a/0x60
[ 21.297442][ T303] __kasan_record_aux_stack+0xd2/0x100
[ 21.302986][ T303] kasan_record_aux_stack_noalloc+0xb/0x10
[ 21.308801][ T303] call_rcu+0x10b/0xf60
[ 21.312956][ T303] blkg_release+0x23/0x30
[ 21.317263][ T303] percpu_ref_switch_to_atomic_rcu+0x611/0x620
[ 21.323401][ T303] rcu_do_batch+0x4c1/0xbf0
[ 21.327915][ T303] rcu_core+0x4a3/0xef0
[ 21.332138][ T303] rcu_core_si+0x9/0x10
[ 21.336271][ T303] handle_softirqs+0x250/0x560
[ 21.341010][ T303] run_ksoftirqd+0x28/0x40
[ 21.345420][ T303] smpboot_thread_fn+0x446/0x880
[ 21.350340][ T303] kthread+0x3f5/0x4f0
[ 21.354393][ T303] ret_from_fork+0x1f/0x30
[ 21.358791][ T303]
[ 21.361105][ T303] The buggy address belongs to the object at ffff88810ada0c00
[ 21.361105][ T303] which belongs to the cache kmalloc-512 of size 512
[ 21.375133][ T303] The buggy address is located 0 bytes inside of
[ 21.375133][ T303] 512-byte region [ffff88810ada0c00, ffff88810ada0e00)
[ 21.388225][ T303] The buggy address belongs to the page:
[ 21.393851][ T303] page:ffffea00042b6800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10ada0
[ 21.404065][ T303] head:ffffea00042b6800 order:2 compound_mapcount:0 compound_pincount:0
[ 21.412362][ T303] flags: 0x4000000000010200(slab|head|zone=1)
[ 21.418405][ T303] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00
[ 21.426964][ T303] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 21.435544][ T303] page dumped because: kasan: bad access detected
[ 21.441963][ T303] page_owner tracks the page as allocated
[ 21.447683][ T303] 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 1954026781, free_ts 0
[ 21.465551][ T303] post_alloc_hook+0x192/0x1b0
[ 21.470303][ T303] prep_new_page+0x1c/0x110
[ 21.474775][ T303] get_page_from_freelist+0x2c3a/0x2cd0
[ 21.480298][ T303] __alloc_pages+0x1a2/0x460
[ 21.484879][ T303] new_slab+0xa0/0x4d0
[ 21.488953][ T303] ___slab_alloc+0x3ac/0x840
[ 21.493527][ T303] __slab_alloc+0x49/0x90
[ 21.497842][ T303] kmem_cache_alloc_trace+0x146/0x270
[ 21.503213][ T303] blkg_alloc+0x82/0x5d0
[ 21.507434][ T303] blkcg_init_queue+0x29/0x210
[ 21.512176][ T303] blk_alloc_queue+0x3be/0x550
[ 21.516929][ T303] blk_mq_init_queue+0x37/0xd0
[ 21.521684][ T303] scsi_alloc_sdev+0x66c/0x9c0
[ 21.526425][ T303] scsi_probe_and_add_lun+0x180/0x35d0
[ 21.531881][ T303] __scsi_scan_target+0x1d2/0xb70
[ 21.536903][ T303] scsi_scan_host_selected+0x34e/0x600
[ 21.542336][ T303] page_owner free stack trace missing
[ 21.547677][ T303]
[ 21.549977][ T303] Memory state around the buggy address:
[ 21.555577][ T303] ffff88810ada0b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 21.563609][ T303] ffff88810ada0b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 21.571641][ T303] >ffff88810ada0c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 21.579678][ T303] ^
[ 21.583716][ T303] ffff88810ada0c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 21.591748][ T303] ffff88810ada0d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 21.599776][ T303] ==================================================================
[ 21.607824][ T303] Disabling lock debugging due to kernel taint
[ 21.614331][ T303] ------------[ cut here ]------------
[ 21.619801][ T303] WARNING: CPU: 1 PID: 303 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0
[ 21.629841][ T30] audit: type=1400 audit(1788031242.462:68): 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
[ 21.629868][ T30] audit: type=1400 audit(1788031242.462:69): 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
[ 21.629887][ T30] audit: type=1400 audit(1788031242.462:70): 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
[ 21.629905][ T30] audit: type=1400 audit(1788031242.462:71): 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
[ 21.629922][ T30] audit: type=1400 audit(1788031242.462:72): 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
[ 21.629939][ T30] audit: type=1400 audit(1788031242.462:73): 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
[ 21.757475][ T303] Modules linked in:
[ 21.761362][ T303] CPU: 0 PID: 303 Comm: syz-executor355 Tainted: G B syzkaller #0
[ 21.770514][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 21.780596][ T303] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0
[ 21.787036][ T303] Code: 5d c3 e8 0c 67 0b fd be 02 00 00 00 eb 0a e8 00 67 0b fd be 01 00 00 00 4c 89 f7 e8 43 e7 f1 fd e9 0f ff ff ff e8 e9 66 0b fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 d8 66 0b fd 4c 89 f7 be 03
[ 21.806702][ T303] RSP: 0018:ffffc90000967b90 EFLAGS: 00010293
[ 21.812793][ T303] RAX: ffffffff845e50c7 RBX: ffff8881067f3000 RCX: ffff88810af92780
[ 21.820757][ T303] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000c04eb7d
[ 21.828759][ T303] RBP: ffffc90000967bb0 R08: 0000000000000003 R09: 0000000000000004
[ 21.836747][ T303] R10: dffffc0000000000 R11: fffffbfff0e18e4c R12: dffffc0000000000
[ 21.844778][ T303] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88810ada0c00
[ 21.852757][ T303] FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[ 21.861685][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.868280][ T303] CR2: 000000000062b5d8 CR3: 000000010d589000 CR4: 00000000003506b0
[ 21.876801][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 21.884846][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 21.892843][ T303] Call Trace:
[ 21.896208][ T303]
[ 21.899121][ T303] pppol2tp_release+0x150/0x2b0
[ 21.903982][ T303] sock_close+0xb8/0x200
[ 21.908217][ T303] ? sock_mmap+0xa0/0xa0
[ 21.912468][ T303] __fput+0x22b/0x900
[ 21.916464][ T303] ____fput+0x15/0x20
[ 21.920428][ T303] task_work_run+0x127/0x190
[ 21.925102][ T303] do_exit+0xb70/0x29a0
[ 21.929426][ T303] ? ptrace_stop+0x6d8/0xa70
[ 21.934056][ T303] ? put_task_struct+0x90/0x90
[ 21.938837][ T303] ? ptrace_notify+0x1ea/0x270
[ 21.943610][ T303] ? do_notify_parent+0x830/0x830
[ 21.948721][ T303] do_group_exit+0x149/0x310
[ 21.953311][ T303] __x64_sys_exit_group+0x3f/0x40
[ 21.958327][ T303] x64_sys_call+0x832/0x9a0
[ 21.962831][ T303] do_syscall_64+0x4c/0xa0
[ 21.967247][ T303] ? clear_bhb_loop+0x50/0xa0
[ 21.971910][ T303] ? clear_bhb_loop+0x50/0xa0
[ 21.976637][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 21.982561][ T303] RIP: 0033:0x7fbf78f04345
[ 21.986979][ T303] Code: Unable to access opcode bytes at RIP 0x7fbf78f0431b.
[ 21.994362][ T303] RSP: 002b:00007ffea9682768 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
[ 22.002806][ T303] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fbf78f04345
[ 22.010758][ T303] RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000000
[ 22.018764][ T303] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffea96828f8
[ 22.026755][ T303] R10: 000000000000000a R11: 0000000000000202 R12: 0000000000000000
+++ exited with 0 +++
[ 22.034