ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor2955389593 <...> Warning: Permanently added '10.128.0.114' (ED25519) to the list of known hosts. execve("ci2-android-6-1/syz-executor2955389593", ["ci2-android-6-1/syz-executor2955389593"], 0x7ffe2583d020 /* 10 vars */) = 0 brk(NULL) = 0x555555d8a000 brk(0x555555d8ae00) = 0x555555d8ae00 arch_prctl(ARCH_SET_FS, 0x555555d8a480) = 0 set_tid_address(0x555555d8a750) = 304 set_robust_list(0x555555d8a760, 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-executor2955389593", 4096) = 44 getrandom("\xe9\x12\xe9\xf0\xbd\x9a\x25\x71", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555d8ae00 brk(0x555555dabe00) = 0x555555dabe00 brk(0x555555dac000) = 0x555555dac000 mprotect(0x7fbe97aed000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fbe97a4ac10, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fbe97a4d9e0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fbe97a4ac10, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fbe97a4d9e0}, NULL, 8) = 0 executing program write(1, "executing program\n", 18) = 18 mkdir("./myconfig", 0777) = 0 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- 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/p_srate", O_WRONLY) = 3 [ 24.611753][ T28] audit: type=1400 audit(1785624500.987:64): avc: denied { execmem } for pid=304 comm="syz-executor295" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.631283][ T28] audit: type=1400 audit(1785624500.987:65): avc: denied { mounton } for pid=304 comm="syz-executor295" path="/root/myconfig" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.643206][ T304] ================================================================== [ 24.662305][ T304] BUG: KASAN: invalid-free in __kmem_cache_free+0xb7/0x1b0 [ 24.663389][ T28] audit: type=1400 audit(1785624500.987:66): avc: denied { mount } for pid=304 comm="syz-executor295" name="/" dev="configfs" ino=12432 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=filesystem permissive=1 [ 24.669553][ T304] Free of addr ffff88811fd94898 by task syz-executor295/304 [ 24.669567][ T304] [ 24.669578][ T304] CPU: 0 PID: 304 Comm: syz-executor295 Not tainted syzkaller #0 [ 24.669598][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 24.693532][ T28] audit: type=1400 audit(1785624500.987:67): avc: denied { search } for pid=304 comm="syz-executor295" name="/" dev="configfs" ino=12432 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 24.699803][ T304] Call Trace: [ 24.699812][ T304] [ 24.699819][ T304] __dump_stack+0x21/0x24 [ 24.702873][ T28] audit: type=1400 audit(1785624500.987:68): avc: denied { write } for pid=304 comm="syz-executor295" name="usb_gadget" dev="configfs" ino=12433 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 24.709857][ T304] dump_stack_lvl+0x110/0x170 [ 24.709885][ T304] ? __cfi_dump_stack_lvl+0x8/0x8 [ 24.720484][ T28] audit: type=1400 audit(1785624500.987:69): avc: denied { add_name } for pid=304 comm="syz-executor295" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 24.742354][ T304] print_address_description+0x71/0x200 [ 24.742382][ T304] print_report+0x4a/0x60 [ 24.742401][ T304] ? __kmem_cache_free+0xb7/0x1b0 [ 24.746332][ T28] audit: type=1400 audit(1785624500.987:70): avc: denied { create } for pid=304 comm="syz-executor295" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:configfs_t tclass=dir permissive=1 [ 24.748623][ T304] kasan_report_invalid_free+0xd5/0xf0 [ 24.753414][ T28] audit: type=1400 audit(1785624501.007:71): avc: denied { write } for pid=304 comm="syz-executor295" name="p_srate" dev="configfs" ino=12919 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 24.776028][ T304] ? __kmem_cache_free+0xb7/0x1b0 [ 24.776061][ T304] ? __kmem_cache_free+0xb7/0x1b0 [ 24.781265][ T28] audit: type=1400 audit(1785624501.007:72): avc: denied { open } for pid=304 comm="syz-executor295" path="/root/myconfig/usb_gadget/g1/functions/uac2.usb0/p_srate" dev="configfs" ino=12919 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 24.785761][ T304] ____kasan_slab_free+0x14f/0x180 [ 24.911814][ T304] __kasan_slab_free+0x11/0x20 [ 24.916595][ T304] slab_free_freelist_hook+0xc2/0x190 [ 24.921966][ T304] ? f_uac2_opts_p_srate_store+0x220/0x2a0 [ 24.927770][ T304] __kmem_cache_free+0xb7/0x1b0 [ 24.932614][ T304] kfree+0x6f/0xf0 [ 24.936340][ T304] f_uac2_opts_p_srate_store+0x220/0x2a0 [ 24.941991][ T304] ? __cfi_f_uac2_opts_p_srate_store+0x10/0x10 [ 24.948146][ T304] ? down_read+0xa6/0xf0 [ 24.952408][ T304] ? __cfi_down_read+0x10/0x10 [ 24.957165][ T304] ? avc_policy_seqno+0x1b/0x70 [ 24.962009][ T304] ? selinux_file_permission+0x2a5/0x510 [ 24.967643][ T304] configfs_write_iter+0x323/0x410 [ 24.972767][ T304] ? __cfi_f_uac2_opts_p_srate_store+0x10/0x10 [ 24.978929][ T304] vfs_write+0x5ef/0xd00 [ 24.983183][ T304] ? __cfi_vfs_write+0x10/0x10 [ 24.987956][ T304] ? memset+0x35/0x40 [ 24.991936][ T304] ? __kasan_check_read+0x11/0x20 [ 24.996960][ T304] ? __fdget_pos+0x2d4/0x380 [ 25.001550][ T304] ksys_write+0x14a/0x260 [ 25.005881][ T304] ? __cfi_ksys_write+0x10/0x10 [ 25.010733][ T304] ? fpregs_restore_userregs+0x128/0x260 [ 25.016371][ T304] __x64_sys_write+0x7b/0x90 [ 25.020956][ T304] x64_sys_call+0x27b/0x9a0 [ 25.025452][ T304] do_syscall_64+0x4c/0xa0 [ 25.029867][ T304] ? clear_bhb_loop+0x30/0x80 [ 25.034534][ T304] ? clear_bhb_loop+0x30/0x80 [ 25.039201][ T304] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 25.045191][ T304] RIP: 0033:0x7fbe97a65ff9 [ 25.049635][ 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 [ 25.069325][ T304] RSP: 002b:00007ffff3dd4508 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 25.077761][ T304] RAX: ffffffffffffffda RBX: 73666769666e6f63 RCX: 00007fbe97a65ff9 [ 25.085733][ T304] RDX: 0000000000000055 RSI: 0000200000000340 RDI: 0000000000000003 [ 25.093704][ T304] RBP: 00007ffff3dd4518 R08: 00007fbe97a4ac10 R09: 00007fbe97a4ac10 [ 25.101682][ T304] R10: 00007fbe97a4ac10 R11: 0000000000000246 R12: 0000000000000000 [ 25.109651][ T304] R13: 0000000000000002 R14: 00007fbe97aedca0 R15: 0000000000000002 [ 25.117619][ T304] [ 25.120634][ T304] [ 25.122970][ T304] Allocated by task 304: [ 25.127192][ T304] kasan_set_track+0x4b/0x70 [ 25.131793][ T304] kasan_save_alloc_info+0x1f/0x30 [ 25.136981][ T304] __kasan_kmalloc+0x95/0xb0 [ 25.141576][ T304] __kmalloc_node_track_caller+0xb1/0x1e0 [ 25.147291][ T304] kstrdup+0x3b/0x80 [ 25.151199][ T304] f_uac2_opts_p_srate_store+0x11a/0x2a0 [ 25.156845][ T304] configfs_write_iter+0x323/0x410 [ 25.161957][ T304] vfs_write+0x5ef/0xd00 [ 25.166196][ T304] ksys_write+0x14a/0x260 [ 25.170532][ T304] __x64_sys_write+0x7b/0x90 [ 25.175113][ T304] x64_sys_call+0x27b/0x9a0 [ 25.179616][ T304] do_syscall_64+0x4c/0xa0 [ 25.184038][ T304] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 25.189943][ T304] [ 25.192259][ T304] The buggy address belongs to the object at ffff88811fd94880 [ 25.192259][ T304] which belongs to the cache kmalloc-96 of size 96 [ 25.206213][ T304] The buggy address is located 24 bytes inside of [ 25.206213][ T304] 96-byte region [ffff88811fd94880, ffff88811fd948e0) [ 25.219413][ T304] [ 25.221760][ T304] The buggy address belongs to the physical page: [ 25.228175][ T304] page:ffffea00047f6500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11fd94 [ 25.238408][ T304] flags: 0x4000000000000200(slab|zone=1) [ 25.244042][ T304] raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100042900 [ 25.252629][ T304] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 25.261201][ T304] page dumped because: kasan: bad access detected [ 25.267600][ T304] page_owner tracks the page as allocated [ 25.273319][ T304] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 199, tgid 199 (dhcpcd), ts 8678412961, free_ts 0 [ 25.289979][ T304] post_alloc_hook+0x1f5/0x210 [ 25.294744][ T304] prep_new_page+0x1c/0x110 [ 25.299242][ T304] get_page_from_freelist+0x2ca9/0x2d20 [ 25.304783][ T304] __alloc_pages+0x1fa/0x610 [ 25.309369][ T304] alloc_slab_page+0x6e/0xf0 [ 25.314068][ T304] new_slab+0x98/0x3e0 [ 25.318138][ T304] ___slab_alloc+0x70f/0xb70 [ 25.322725][ T304] __slab_alloc+0x5e/0xa0 [ 25.327118][ T304] __kmem_cache_alloc_node+0x204/0x2d0 [ 25.332571][ T304] __kmalloc+0xa4/0x1e0 [ 25.336717][ T304] bpf_convert_filter+0x10e/0x5220 [ 25.341820][ T304] bpf_prepare_filter+0xe81/0x11c0 [ 25.346921][ T304] __get_filter+0x2e2/0x410 [ 25.351417][ T304] sk_attach_filter+0x23/0x140 [ 25.356189][ T304] sk_setsockopt+0x18b4/0x26b0 [ 25.360946][ T304] sock_setsockopt+0x5a/0x70 [ 25.365551][ T304] page_owner free stack trace missing [ 25.370910][ T304] [ 25.373226][ T304] Memory state around the buggy address: [ 25.378866][ T304] ffff88811fd94780: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.386913][ T304] ffff88811fd94800: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.394961][ T304] >ffff88811fd94880: 00 00 00 00 00 00 00 00 00 03 fc fc fc fc fc fc [ 25.403008][ T304] ^ write(3, "\x34\x34\x31\x30\x30\x2c\x34\x38\x30\x30\xbd\x19\x5c\xa7\x37\x9d\xda\x9a\xd6\xf5\x11\xc8\x30\x2c\x38\x38\xfa\x52\x05\x6f\xbb\x9b\x6e\xf6\x51\xcd\x0f\x6f\x87\xbf\x15\xa8\xdc\x1d\x23\xab\x3d\x32\x77\x3d\x57\x1f\xd4\x30\x4a\xad\xad\x37\xf9\x9a\x88\x33\x99\x2c\xa9\xc5\x9f\x29\xdd\x1d\x37\x40\x1f\x74\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 85) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [ 25.407849][ T304] ffff88811fd94900: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc