ci2-android-5-15/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-5-15/syz-executor3947795367
<...>
Warning: Permanently added '10.128.1.89' (ED25519) to the list of known hosts.
execve("ci2-android-5-15/syz-executor3947795367", ["ci2-android-5-15/syz-executor3947795367"], 0x7ffe98f84780 /* 10 vars */) = 0
brk(NULL) = 0x55558c9f2000
brk(0x55558c9f2d40) = 0x55558c9f2d40
arch_prctl(ARCH_SET_FS, 0x55558c9f23c0) = 0
set_tid_address(0x55558c9f2690) = 303
set_robust_list(0x55558c9f26a0, 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-executor3947795367", 4096) = 45
getrandom("\x37\xe3\x88\xce\xb3\x73\x06\xa5", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x55558c9f2d40
brk(0x55558ca13d40) = 0x55558ca13d40
brk(0x55558ca14000) = 0x55558ca14000
mprotect(0x7f5bffcfe000, 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\x02\x00\x4e\x24\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x03\x00\x00\x00"}, 38) = 0
ioctl(3, SIOCGIFINDEX, NULL) = -1 EFAULT (Bad address)
exit_group(0) = ?
[ 24.391422][ T30] audit: type=1400 audit(1789351792.334:64): avc: denied { execmem } for pid=303 comm="syz-executor394" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[ 24.410892][ T30] audit: type=1400 audit(1789351792.334:65): avc: denied { create } for pid=303 comm="syz-executor394" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 24.431334][ T30] audit: type=1400 audit(1789351792.334:66): avc: denied { connect } for pid=303 comm="syz-executor394" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 24.451395][ T30] audit: type=1400 audit(1789351792.374:67): avc: denied { ioctl } for pid=303 comm="syz-executor394" path="socket:[14213]" dev="sockfs" ino=14213 ioctlcmd=0x8933 scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=pppox_socket permissive=1
[ 24.451410][ T303] ==================================================================
[ 24.484434][ T303] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0
[ 24.492511][ T303] Read of size 4 at addr ffff888109cb0000 by task syz-executor394/303
[ 24.500654][ T303]
[ 24.502976][ T303] CPU: 0 PID: 303 Comm: syz-executor394 Not tainted syzkaller #0
[ 24.510699][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 24.520756][ T303] Call Trace:
[ 24.524029][ T303]
[ 24.526963][ T303] __dump_stack+0x21/0x30
[ 24.531315][ T303] dump_stack_lvl+0x110/0x170
[ 24.535988][ T303] ? show_regs_print_info+0x20/0x20
[ 24.541182][ T303] ? load_image+0x3f0/0x3f0
[ 24.545697][ T303] ? __local_bh_enable_ip+0x58/0x80
[ 24.550893][ T303] print_address_description+0x7f/0x2c0
[ 24.556432][ T303] ? pppol2tp_sock_to_session+0x1a0/0x1b0
[ 24.562186][ T303] kasan_report+0x10f/0x150
[ 24.566689][ T303] ? pppol2tp_sock_to_session+0x1a0/0x1b0
[ 24.572406][ T303] __asan_report_load4_noabort+0x14/0x20
[ 24.578040][ T303] pppol2tp_sock_to_session+0x1a0/0x1b0
[ 24.583581][ T303] pppol2tp_release+0x150/0x2b0
[ 24.588429][ T303] sock_close+0xb8/0x200
[ 24.592672][ T303] ? sock_mmap+0xa0/0xa0
[ 24.596927][ T303] __fput+0x22b/0x900
[ 24.600907][ T303] ____fput+0x15/0x20
[ 24.604885][ T303] task_work_run+0x127/0x190
[ 24.609469][ T303] do_exit+0xb70/0x29a0
[ 24.613622][ T303] ? ptrace_stop+0x6d8/0xa70
[ 24.618207][ T303] ? put_task_struct+0x90/0x90
[ 24.622965][ T303] ? ptrace_notify+0x1ea/0x270
[ 24.627823][ T303] ? do_notify_parent+0x830/0x830
[ 24.632873][ T303] do_group_exit+0x149/0x310
[ 24.637459][ T303] __x64_sys_exit_group+0x3f/0x40
[ 24.642502][ T303] x64_sys_call+0x832/0x9a0
[ 24.646993][ T303] do_syscall_64+0x4c/0xa0
[ 24.651404][ T303] ? clear_bhb_loop+0x50/0xa0
[ 24.656085][ T303] ? clear_bhb_loop+0x50/0xa0
[ 24.660771][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 24.666655][ T303] RIP: 0033:0x7f5bffc6d305
[ 24.671073][ T303] Code: Unable to access opcode bytes at RIP 0x7f5bffc6d2db.
[ 24.678422][ T303] RSP: 002b:00007ffdccd59e58 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
[ 24.686825][ T303] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f5bffc6d305
[ 24.694789][ T303] RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000000
[ 24.702783][ T303] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdccd59fe8
[ 24.710748][ T303] R10: 0000000000000003 R11: 0000000000000206 R12: 0000000000000000
[ 24.718711][ T303] R13: 00007f5bffd03110 R14: 00007f5bffd053a8 R15: 00007f5bffd053c0
[ 24.726677][ T303]
[ 24.729696][ T303]
[ 24.732027][ T303] Allocated by task 303:
[ 24.736280][ T303] __kasan_kmalloc+0xd4/0x100
[ 24.740969][ T303] __kmalloc+0x13d/0x2c0
[ 24.745311][ T303] l2tp_session_create+0x39/0xb60
[ 24.750344][ T303] pppol2tp_connect+0xbf5/0x1640
[ 24.755289][ T303] __sys_connect+0x3cb/0x450
[ 24.759916][ T303] __x64_sys_connect+0x7a/0x90
[ 24.764692][ T303] x64_sys_call+0x7c/0x9a0
[ 24.769143][ T303] do_syscall_64+0x4c/0xa0
[ 24.773573][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 24.779478][ T303]
[ 24.781826][ T303] Freed by task 8:
[ 24.785549][ T303] kasan_set_track+0x4a/0x70
[ 24.790152][ T303] kasan_set_free_info+0x23/0x40
[ 24.795097][ T303] ____kasan_slab_free+0x125/0x160
[ 24.800218][ T303] __kasan_slab_free+0x11/0x20
[ 24.804987][ T303] slab_free_freelist_hook+0xc2/0x190
[ 24.810372][ T303] kfree+0xc4/0x270
[ 24.814194][ T303] l2tp_session_put+0xaf/0x1a0
[ 24.818971][ T303] l2tp_session_delete+0x3a9/0x4a0
[ 24.824090][ T303] l2tp_tunnel_del_work+0x180/0x3d0
[ 24.829302][ T303] process_one_work+0x6c8/0xbb0
[ 24.834169][ T303] worker_thread+0xaa0/0x1250
[ 24.838857][ T303] kthread+0x3f5/0x4f0
[ 24.842935][ T303] ret_from_fork+0x1f/0x30
[ 24.847361][ T303]
[ 24.849690][ T303] Last potentially related work creation:
[ 24.855405][ T303] kasan_save_stack+0x3a/0x60
[ 24.860089][ T303] __kasan_record_aux_stack+0xd2/0x100
[ 24.865572][ T303] kasan_record_aux_stack_noalloc+0xb/0x10
[ 24.871472][ T303] call_rcu+0x10b/0xf60
[ 24.875639][ T303] blkg_release+0x23/0x30
[ 24.879979][ T303] percpu_ref_switch_to_atomic_rcu+0x611/0x620
[ 24.886148][ T303] rcu_do_batch+0x4c1/0xbf0
[ 24.890660][ T303] rcu_core+0x4a3/0xef0
[ 24.894835][ T303] rcu_core_si+0x9/0x10
[ 24.898991][ T303] handle_softirqs+0x250/0x560
[ 24.903766][ T303] run_ksoftirqd+0x28/0x40
[ 24.908191][ T303] smpboot_thread_fn+0x446/0x880
[ 24.913151][ T303] kthread+0x3f5/0x4f0
[ 24.917229][ T303] ret_from_fork+0x1f/0x30
[ 24.921654][ T303]
[ 24.923994][ T303] The buggy address belongs to the object at ffff888109cb0000
[ 24.923994][ T303] which belongs to the cache kmalloc-512 of size 512
[ 24.938051][ T303] The buggy address is located 0 bytes inside of
[ 24.938051][ T303] 512-byte region [ffff888109cb0000, ffff888109cb0200)
[ 24.951160][ T303] The buggy address belongs to the page:
[ 24.956801][ T303] page:ffffea0004272c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109cb0
[ 24.967065][ T303] head:ffffea0004272c00 order:2 compound_mapcount:0 compound_pincount:0
[ 24.975414][ T303] flags: 0x4000000000010200(slab|head|zone=1)
[ 24.981524][ T303] raw: 4000000000010200 ffffea0004066400 0000000200000002 ffff888100042f00
[ 24.990119][ T303] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 24.998701][ T303] page dumped because: kasan: bad access detected
[ 25.005129][ T303] page_owner tracks the page as allocated
[ 25.010847][ 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 2407643117, free_ts 2404520049
[ 25.029513][ T303] post_alloc_hook+0x192/0x1b0
[ 25.034281][ T303] prep_new_page+0x1c/0x110
[ 25.038782][ T303] get_page_from_freelist+0x2c3a/0x2cd0
[ 25.044328][ T303] __alloc_pages+0x1a2/0x460
[ 25.048955][ T303] new_slab+0xa0/0x4d0
[ 25.053031][ T303] ___slab_alloc+0x3ac/0x840
[ 25.057627][ T303] __slab_alloc+0x49/0x90
[ 25.061970][ T303] kmem_cache_alloc_trace+0x146/0x270
[ 25.067345][ T303] blkg_alloc+0x82/0x5d0
[ 25.071596][ T303] blkcg_init_queue+0x29/0x210
[ 25.076364][ T303] blk_alloc_queue+0x3be/0x550
[ 25.081143][ T303] blk_mq_init_queue+0x37/0xd0
[ 25.085923][ T303] scsi_alloc_sdev+0x66c/0x9c0
[ 25.090693][ T303] scsi_probe_and_add_lun+0x180/0x35d0
[ 25.096159][ T303] __scsi_scan_target+0x1d2/0xb70
[ 25.101186][ T303] scsi_scan_host_selected+0x34e/0x600
[ 25.106670][ T303] page last free stack trace:
[ 25.111341][ T303] free_unref_page_prepare+0x5fa/0x600
[ 25.116812][ T303] free_unref_page+0xae/0x540
[ 25.121491][ T303] __free_pages+0x6c/0x100
[ 25.125931][ T303] free_pages+0x82/0x90
[ 25.130092][ T303] __stack_depot_save+0x453/0x480
[ 25.135132][ T303] __kasan_slab_alloc+0xc9/0xe0
[ 25.139994][ T303] slab_post_alloc_hook+0x4f/0x2b0
[ 25.145125][ T303] kmem_cache_alloc+0xf7/0x260
[ 25.149892][ T303] __kernfs_new_node+0xe1/0x670
[ 25.154768][ T303] kernfs_new_node+0x150/0x260
[ 25.159592][ T303] kernfs_create_link+0xa4/0x200
[ 25.164546][ T303] sysfs_do_create_link_sd+0x8a/0x110
[ 25.169930][ T303] sysfs_create_link+0x68/0x80
[ 25.174699][ T303] device_add+0x572/0xe90
[ 25.179036][ T303] scsi_sysfs_add_sdev+0x2fa/0x7d0
[ 25.184156][ T303] scsi_probe_and_add_lun+0x2c14/0x35d0
[ 25.189711][ T303]
[ 25.192034][ T303] Memory state around the buggy address:
[ 25.197669][ T303] ffff888109caff00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
[ 25.205734][ T303] ffff888109caff80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
[ 25.213802][ T303] >ffff888109cb0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 25.221865][ T303] ^
[ 25.225927][ T303] ffff888109cb0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 25.233988][ T303] ffff888109cb0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 25.242044][ T303] ==================================================================
[ 25.250100][ T303] Disabling lock debugging due to kernel taint
[ 25.261625][ T30] audit: type=1400 audit(1789351793.204:68): 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
[ 25.285265][ T303] ------------[ cut here ]------------
[ 25.290919][ T303] WARNING: CPU: 1 PID: 303 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0
[ 25.301343][ T30] audit: type=1400 audit(1789351793.204:69): 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
[ 25.322951][ T303] Modules linked in:
[ 25.326954][ T303] CPU: 1 PID: 303 Comm: syz-executor394 Tainted: G B syzkaller #0
[ 25.336656][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 25.347126][ T30] audit: type=1400 audit(1789351793.204:70): 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
[ 25.368839][ T30] audit: type=1400 audit(1789351793.204:71): 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
[ 25.388675][ T303] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0
[ 25.391814][ T30] audit: type=1400 audit(1789351793.204:72): 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
[ 25.395717][ T303] Code: 5d c3 e8 0c f9 0a fd be 02 00 00 00 eb 0a e8 00 f9 0a fd be 01 00 00 00 4c 89 f7 e8 03 69 f1 fd e9 0f ff ff ff e8 e9 f8 0a fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 d8 f8 0a fd 4c 89 f7 be 03
[ 25.395736][ T303] RSP: 0018:ffffc90000977b90 EFLAGS: 00010293
[ 25.395756][ T303] RAX: ffffffff845eceb7 RBX: ffff888107fba000 RCX: ffff88810acf0000
[ 25.395772][ T303] RDX: 0000000000000000 RSI: 000000000ad74000 RDI: 000000000c04eb7d
[ 25.395785][ T303] RBP: ffffc90000977bb0 R08: 0000000000000003 R09: 0000000000000004
[ 25.395798][ T303] R10: dffffc0000000000 R11: fffffbfff0e18e4c R12: dffffc0000000000
[ 25.395812][ T303] R13: dffffc0000000000 R14: 000000000ad74000 R15: ffff888109cb0000
[ 25.395827][ T303] FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[ 25.418181][ T30] audit: type=1400 audit(1789351793.204:73): 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
[ 25.498632][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 25.525526][ T303] CR2: 00007f5bffcd317c CR3: 000000000660f000 CR4: 00000000003506b0
[ 25.533585][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 25.541621][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 25.549648][ T303] Call Trace:
[ 25.557770][ T303]
[ 25.560771][ T303] pppol2tp_release+0x150/0x2b0
[ 25.565649][ T303] sock_close+0xb8/0x200
[ 25.569944][ T303] ? sock_mmap+0xa0/0xa0
[ 25.574219][ T303] __fput+0x22b/0x900
[ 25.578230][ T303] ____fput+0x15/0x20
[ 25.582251][ T303] task_work_run+0x127/0x190
[ 25.586857][ T303] do_exit+0xb70/0x29a0
[ 25.591061][ T303] ? ptrace_stop+0x6d8/0xa70
[ 25.595681][ T303] ? put_task_struct+0x90/0x90
[ 25.600484][ T303] ? ptrace_notify+0x1ea/0x270
[ 25.605285][ T303] ? do_notify_parent+0x830/0x830
[ 25.610355][ T303] do_group_exit+0x149/0x310
[ 25.614980][ T303] __x64_sys_exit_group+0x3f/0x40
[ 25.620065][ T303] x64_sys_call+0x832/0x9a0
[ 25.624585][ T303] do_syscall_64+0x4c/0xa0
[ 25.629042][ T303] ? clear_bhb_loop+0x50/0xa0
[ 25.633738][ T303] ? clear_bhb_loop+0x50/0xa0
[ 25.638457][ T303] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 25.644422][ T303] RIP: 0033:0x7f5bffc6d305
[ 25.648916][ T303] Code: Unable to access opcode bytes at RIP 0x7f5bffc6d2db.
[ 25.656293][ T303] RSP: 002b:00007ffdccd59e58 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
[ 25.664774][ T303] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f5bffc6d305
[ 25.672806][ T303] RDX: 00000000000000e7 RSI: ffffffffffffffd8 RDI: 0000000000000000
[ 25.680813][ T303] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdccd59fe8
[ 25.688834][ T303] R10: 0000000000000003 R11: 0000000000000206 R12: 0000000000000000
+++ exited with 0 +++
[ 25.