ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor3197177911 <...> Warning: Permanently added '10.128.0.41' (ED25519) to the list of known hosts. execve("ci2-android-6-1/syz-executor3197177911", ["ci2-android-6-1/syz-executor3197177911"], 0x7ffd680b7680 /* 10 vars */) = 0 brk(NULL) = 0x55556fa53000 brk(0x55556fa53d40) = 0x55556fa53d40 arch_prctl(ARCH_SET_FS, 0x55556fa533c0) = 0 set_tid_address(0x55556fa53690) = 304 set_robust_list(0x55556fa536a0, 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-6-1/syz-executor3197177911", 4096) = 44 getrandom("\xa8\x44\x50\xb5\x3b\xde\x22\xf4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556fa53d40 brk(0x55556fa74d40) = 0x55556fa74d40 brk(0x55556fa75000) = 0x55556fa75000 mprotect(0x7fcac55cc000, 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 mkdirat(AT_FDCWD, "./myconfig", 0474) = 0 mount(NULL, "./myconfig", "configfs", 0, NULL) = 0 mkdirat(AT_FDCWD, "./myconfig/usb_gadget/g1", 0777) = 0 mkdirat(AT_FDCWD, "./myconfig/usb_gadget/g1/functions/uac2.usb0", 0777) = 0 openat(AT_FDCWD, "./myconfig/usb_gadget/g1/functions/uac2.usb0/c_srate", O_RDWR|O_TRUNC|O_LARGEFILE|O_NOFOLLOW|O_NOATIME|O_CLOEXEC) = 3 [ 22.406964][ T28] audit: type=1400 audit(1786533860.341:64): avc: denied { execmem } for pid=304 comm="syz-executor319" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.413787][ T304] ================================================================== [ 22.429982][ T28] audit: type=1400 audit(1786533860.341:65): avc: denied { mounton } for pid=304 comm="syz-executor319" path="/root/myconfig" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 22.434895][ T304] BUG: KASAN: invalid-free in __kmem_cache_free+0xb7/0x1b0 [ 22.434954][ T304] Free of addr ffff88810f8aea4c by task syz-executor319/304 [ 22.434966][ T304] [ 22.434972][ T304] CPU: 0 PID: 304 Comm: syz-executor319 Not tainted syzkaller #0 [ 22.434989][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 22.458313][ T28] audit: type=1400 audit(1786533860.341:66): avc: denied { mount } for pid=304 comm="syz-executor319" name="/" dev="configfs" ino=13779 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=filesystem permissive=1 [ 22.465117][ T304] Call Trace: [ 22.465125][ T304] [ 22.465131][ T304] __dump_stack+0x21/0x24 [ 22.472726][ T28] audit: type=1400 audit(1786533860.341:67): avc: denied { search } for pid=304 comm="syz-executor319" name="/" dev="configfs" ino=13779 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 22.475110][ T304] dump_stack_lvl+0x110/0x170 [ 22.482870][ T28] audit: type=1400 audit(1786533860.341:68): avc: denied { write } for pid=304 comm="syz-executor319" name="usb_gadget" dev="configfs" ino=13780 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 22.492869][ T304] ? __cfi_dump_stack_lvl+0x8/0x8 [ 22.492896][ T304] print_address_description+0x71/0x200 [ 22.515980][ T28] audit: type=1400 audit(1786533860.341:69): avc: denied { add_name } for pid=304 comm="syz-executor319" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 22.519233][ T304] print_report+0x4a/0x60 [ 22.522179][ T28] audit: type=1400 audit(1786533860.341:70): avc: denied { create } for pid=304 comm="syz-executor319" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:configfs_t tclass=dir permissive=1 [ 22.526911][ T304] ? __kmem_cache_free+0xb7/0x1b0 [ 22.549319][ T28] audit: type=1400 audit(1786533860.351:71): avc: denied { read write } for pid=304 comm="syz-executor319" name="c_srate" dev="configfs" ino=14200 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 22.553985][ T304] kasan_report_invalid_free+0xd5/0xf0 [ 22.554011][ T304] ? __kmem_cache_free+0xb7/0x1b0 [ 22.554033][ T304] ? __kmem_cache_free+0xb7/0x1b0 [ 22.554054][ T304] ____kasan_slab_free+0x14f/0x180 [ 22.578576][ T28] audit: type=1400 audit(1786533860.351:72): avc: denied { open } for pid=304 comm="syz-executor319" path="/root/myconfig/usb_gadget/g1/functions/uac2.usb0/c_srate" dev="configfs" ino=14200 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 22.582752][ T304] __kasan_slab_free+0x11/0x20 [ 22.582778][ T304] slab_free_freelist_hook+0xc2/0x190 [ 22.719817][ T304] ? f_uac2_opts_c_srate_store+0x220/0x2a0 [ 22.725667][ T304] __kmem_cache_free+0xb7/0x1b0 [ 22.730636][ T304] kfree+0x6f/0xf0 [ 22.734517][ T304] f_uac2_opts_c_srate_store+0x220/0x2a0 [ 22.740340][ T304] ? __cfi_f_uac2_opts_c_srate_store+0x10/0x10 [ 22.746493][ T304] ? down_read+0xa6/0xf0 [ 22.750767][ T304] ? __cfi_down_read+0x10/0x10 [ 22.755540][ T304] ? avc_policy_seqno+0x1b/0x70 [ 22.760388][ T304] ? selinux_file_permission+0x2a5/0x510 [ 22.766102][ T304] configfs_write_iter+0x323/0x410 [ 22.771228][ T304] ? __cfi_f_uac2_opts_c_srate_store+0x10/0x10 [ 22.777476][ T304] vfs_write+0x5ef/0xd00 [ 22.781719][ T304] ? __cfi_vfs_write+0x10/0x10 [ 22.786480][ T304] ? memset+0x35/0x40 [ 22.790725][ T304] ? __kasan_check_read+0x11/0x20 [ 22.795747][ T304] ? __fdget_pos+0x2d4/0x380 [ 22.800342][ T304] ksys_write+0x14a/0x260 [ 22.804673][ T304] ? __cfi_ksys_write+0x10/0x10 [ 22.809538][ T304] ? fpregs_restore_userregs+0x128/0x260 [ 22.815181][ T304] __x64_sys_write+0x7b/0x90 [ 22.819775][ T304] x64_sys_call+0x27b/0x9a0 [ 22.824279][ T304] do_syscall_64+0x4c/0xa0 [ 22.828698][ T304] ? clear_bhb_loop+0x30/0x80 [ 22.833373][ T304] ? clear_bhb_loop+0x30/0x80 [ 22.838050][ T304] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 22.843957][ T304] RIP: 0033:0x7fcac553bcf9 [ 22.848392][ T304] Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 d8 ff ff ff f7 d8 64 89 01 48 [ 22.868010][ T304] RSP: 002b:00007ffdfce96208 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 22.876430][ T304] RAX: ffffffffffffffda RBX: 666e6f63796d2f2e RCX: 00007fcac553bcf9 [ 22.884409][ T304] RDX: 000000000000001a RSI: 00002000000004c0 RDI: 0000000000000003 [ 22.892380][ T304] RBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffdfce96338 [ 22.900346][ T304] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdfce96328 [ 22.908315][ T304] R13: 0000000000000002 R14: 00007fcac55ccca0 R15: 0000000000000002 [ 22.916379][ T304] [ 22.919417][ T304] [ 22.921736][ T304] Allocated by task 304: [ 22.925969][ T304] kasan_set_track+0x4b/0x70 [ 22.930571][ T304] kasan_save_alloc_info+0x1f/0x30 [ 22.935684][ T304] __kasan_kmalloc+0x95/0xb0 [ 22.940279][ T304] __kmalloc_node_track_caller+0xb1/0x1e0 [ 22.945998][ T304] kstrdup+0x3b/0x80 [ 22.949980][ T304] f_uac2_opts_c_srate_store+0x11a/0x2a0 [ 22.955620][ T304] configfs_write_iter+0x323/0x410 [ 22.960735][ T304] vfs_write+0x5ef/0xd00 [ 22.964988][ T304] ksys_write+0x14a/0x260 [ 22.969403][ T304] __x64_sys_write+0x7b/0x90 [ 22.973988][ T304] x64_sys_call+0x27b/0x9a0 [ 22.978491][ T304] do_syscall_64+0x4c/0xa0 [ 22.982908][ T304] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 22.988802][ T304] [ 22.991121][ T304] The buggy address belongs to the object at ffff88810f8aea40 [ 22.991121][ T304] which belongs to the cache kmalloc-32 of size 32 [ 23.005001][ T304] The buggy address is located 12 bytes inside of [ 23.005001][ T304] 32-byte region [ffff88810f8aea40, ffff88810f8aea60) [ 23.018184][ T304] [ 23.020506][ T304] The buggy address belongs to the physical page: [ 23.027150][ T304] page:ffffea00043e2b80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10f8ae [ 23.037469][ T304] flags: 0x4000000000000200(slab|zone=1) [ 23.043190][ T304] raw: 4000000000000200 0000000000000000 dead000000000001 ffff888100042600 [ 23.051774][ T304] raw: 0000000000000000 0000000080400040 00000001ffffffff 0000000000000000 [ 23.060364][ T304] page dumped because: kasan: bad access detected [ 23.066766][ T304] page_owner tracks the page as allocated [ 23.072566][ T304] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (init), ts 4321050003, free_ts 4320913864 [ 23.089494][ T304] post_alloc_hook+0x1f5/0x210 [ 23.094350][ T304] prep_new_page+0x1c/0x110 [ 23.099468][ T304] get_page_from_freelist+0x2ca9/0x2d20 [ 23.105369][ T304] __alloc_pages+0x1fa/0x610 [ 23.109961][ T304] alloc_slab_page+0x6e/0xf0 [ 23.114549][ T304] new_slab+0x98/0x3e0 [ 23.118615][ T304] ___slab_alloc+0x70f/0xb70 [ 23.123213][ T304] __slab_alloc+0x5e/0xa0 [ 23.127552][ T304] __kmem_cache_alloc_node+0x204/0x2d0 [ 23.133025][ T304] __kmalloc_node_track_caller+0xa1/0x1e0 [ 23.138740][ T304] kstrdup+0x3b/0x80 [ 23.142628][ T304] get_classes_callback+0x46/0xa0 [ 23.147650][ T304] hashtab_map+0x106/0x200 [ 23.152063][ T304] security_get_classes+0xc9/0x270 [ 23.157179][ T304] sel_make_policy_nodes+0xa55/0x1350 [ 23.162555][ T304] sel_write_load+0x3dc/0x600 [ 23.167238][ T304] page last free stack trace: [ 23.171904][ T304] free_unref_page_prepare+0x80c/0x820 [ 23.177369][ T304] free_unref_page+0x93/0x530 [ 23.182143][ T304] __free_pages+0x67/0x100 [ 23.186562][ T304] free_pages+0x82/0x90 [ 23.190731][ T304] sel_make_policy_nodes+0xa05/0x1350 [ 23.196197][ T304] sel_write_load+0x3dc/0x600 [ 23.200884][ T304] vfs_write+0x3fb/0xd00 [ 23.205147][ T304] ksys_write+0x14a/0x260 [ 23.209501][ T304] __x64_sys_write+0x7b/0x90 [ 23.214091][ T304] x64_sys_call+0x27b/0x9a0 [ 23.218606][ T304] do_syscall_64+0x4c/0xa0 [ 23.223055][ T304] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 23.229007][ T304] [ 23.231344][ T304] Memory state around the buggy address: [ 23.236984][ T304] ffff88810f8ae900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 23.245049][ T304] ffff88810f8ae980: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc write(3, "\x34\x74\x99\xac\xee\x44\x6f\x81\xaa\x92\x30\x2c\x38\x38\x32\x30\x30\x2c\xa6\x45\x26\x92\x46\x9d\x66\xe0", 26) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [ 23.253110][ T304] >ffff88810f8aea00: fb fb fb fb fc fc fc fc 00 00 00 03 fc fc fc fc