ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor3751934511 <...> Warning: Permanently added '10.128.0.186' (ED25519) to the list of known hosts. execve("ci2-android-6-1/syz-executor3751934511", ["ci2-android-6-1/syz-executor3751934511"], 0x7fff4c54cd00 /* 10 vars */) = 0 brk(NULL) = 0x55556da2f000 brk(0x55556da2fd40) = 0x55556da2fd40 arch_prctl(ARCH_SET_FS, 0x55556da2f3c0) = 0 set_tid_address(0x55556da2f690) = 305 set_robust_list(0x55556da2f6a0, 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-executor3751934511", 4096) = 44 getrandom("\x8a\x32\x42\x2a\x2f\x07\xdb\x01", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556da2fd40 brk(0x55556da50d40) = 0x55556da50d40 brk(0x55556da51000) = 0x55556da51000 mprotect(0x7f07d6cb3000, 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 mkdirat(AT_FDCWD, "./config", 0777) = 0 mount(NULL, "./config", "configfs", 0, NULL) = 0 mkdirat(AT_FDCWD, "./config/usb_gadget/g1", 0777) = 0 mkdirat(AT_FDCWD, "./config/usb_gadget/g1/functions/uac1.usb0", 0777) = 0 openat(AT_FDCWD, "./config/usb_gadget/g1/functions/uac1.usb0/c_srate", O_WRONLY) = 3 executing program [ 31.236130][ T28] audit: type=1400 audit(1789030704.682:64): avc: denied { execmem } for pid=305 comm="syz-executor375" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 31.244852][ T305] ================================================================== [ 31.263661][ T305] BUG: KASAN: invalid-free in __kmem_cache_free+0xb7/0x1b0 [ 31.270960][ T305] Free of addr ffff88810fada693 by task syz-executor375/305 [ 31.272679][ T28] audit: type=1400 audit(1789030704.682:65): avc: denied { mounton } for pid=305 comm="syz-executor375" path="/root/config" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 31.278366][ T305] [ 31.278378][ T305] CPU: 0 PID: 305 Comm: syz-executor375 Not tainted syzkaller #0 [ 31.278416][ T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 31.278447][ T305] Call Trace: [ 31.302513][ T28] audit: type=1400 audit(1789030704.682:66): avc: denied { mount } for pid=305 comm="syz-executor375" name="/" dev="configfs" ino=12952 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=filesystem permissive=1 [ 31.303533][ T305] [ 31.303542][ T305] __dump_stack+0x21/0x24 [ 31.311695][ T28] audit: type=1400 audit(1789030704.682:67): avc: denied { search } for pid=305 comm="syz-executor375" name="/" dev="configfs" ino=12952 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 31.321392][ T305] dump_stack_lvl+0x110/0x170 [ 31.321428][ T305] ? __cfi_dump_stack_lvl+0x8/0x8 [ 31.324842][ T28] audit: type=1400 audit(1789030704.682:68): avc: denied { write } for pid=305 comm="syz-executor375" name="usb_gadget" dev="configfs" ino=12953 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 31.347637][ T305] print_address_description+0x71/0x200 [ 31.347678][ T305] print_report+0x4a/0x60 [ 31.350713][ T28] audit: type=1400 audit(1789030704.682:69): avc: denied { add_name } for pid=305 comm="syz-executor375" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 31.355002][ T305] ? __kmem_cache_free+0xb7/0x1b0 [ 31.355033][ T305] kasan_report_invalid_free+0xd5/0xf0 [ 31.377576][ T28] audit: type=1400 audit(1789030704.682:70): avc: denied { create } for pid=305 comm="syz-executor375" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:configfs_t tclass=dir permissive=1 [ 31.382128][ T305] ? __kmem_cache_free+0xb7/0x1b0 [ 31.389575][ T28] audit: type=1400 audit(1789030704.682:71): avc: denied { write } for pid=305 comm="syz-executor375" name="c_srate" dev="configfs" ino=14624 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 31.410240][ T305] ? __kmem_cache_free+0xb7/0x1b0 [ 31.410277][ T305] ____kasan_slab_free+0x14f/0x180 [ 31.416610][ T28] audit: type=1400 audit(1789030704.682:72): avc: denied { open } for pid=305 comm="syz-executor375" path="/root/config/usb_gadget/g1/functions/uac1.usb0/c_srate" dev="configfs" ino=14624 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 31.420185][ T305] __kasan_slab_free+0x11/0x20 [ 31.540850][ T305] slab_free_freelist_hook+0xc2/0x190 [ 31.546230][ T305] ? f_uac1_opts_c_srate_store+0x220/0x2a0 [ 31.552040][ T305] __kmem_cache_free+0xb7/0x1b0 [ 31.556910][ T305] kfree+0x6f/0xf0 [ 31.560634][ T305] f_uac1_opts_c_srate_store+0x220/0x2a0 [ 31.566279][ T305] ? __cfi_f_uac1_opts_c_srate_store+0x10/0x10 [ 31.572606][ T305] ? down_read+0xa6/0xf0 [ 31.576846][ T305] ? __cfi_down_read+0x10/0x10 [ 31.581617][ T305] ? avc_policy_seqno+0x1b/0x70 [ 31.586466][ T305] ? selinux_file_permission+0x2a5/0x510 [ 31.592205][ T305] configfs_write_iter+0x323/0x410 [ 31.597328][ T305] ? __cfi_f_uac1_opts_c_srate_store+0x10/0x10 [ 31.603488][ T305] vfs_write+0x5ef/0xd00 [ 31.607735][ T305] ? __cfi_vfs_write+0x10/0x10 [ 31.612495][ T305] ? memset+0x35/0x40 [ 31.616476][ T305] ? __kasan_check_read+0x11/0x20 [ 31.621511][ T305] ? __fdget_pos+0x2d4/0x380 [ 31.626187][ T305] ksys_write+0x14a/0x260 [ 31.630520][ T305] ? __cfi_ksys_write+0x10/0x10 [ 31.635369][ T305] ? fpregs_restore_userregs+0x128/0x260 [ 31.641002][ T305] __x64_sys_write+0x7b/0x90 [ 31.645589][ T305] x64_sys_call+0x27b/0x9a0 [ 31.650122][ T305] do_syscall_64+0x4c/0xa0 [ 31.654553][ T305] ? clear_bhb_loop+0x30/0x80 [ 31.659233][ T305] ? clear_bhb_loop+0x30/0x80 [ 31.663909][ T305] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 31.669802][ T305] RIP: 0033:0x7f07d6c22cf9 [ 31.674234][ T305] 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 [ 31.693841][ T305] RSP: 002b:00007ffd16f6f268 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 31.702256][ T305] RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007f07d6c22cf9 [ 31.710229][ T305] RDX: 0000000000000029 RSI: 0000200000000040 RDI: 0000000000000003 [ 31.718214][ T305] RBP: 6769666e6f632f2e R08: 0000000000000000 R09: 00000000000a8c88 [ 31.726197][ T305] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd16f6f398 [ 31.734169][ T305] R13: 0000000000000002 R14: 00007f07d6cb3ca0 R15: 0000000000000002 [ 31.742182][ T305] [ 31.745236][ T305] [ 31.747578][ T305] Allocated by task 305: [ 31.751824][ T305] kasan_set_track+0x4b/0x70 [ 31.756443][ T305] kasan_save_alloc_info+0x1f/0x30 [ 31.761560][ T305] __kasan_kmalloc+0x95/0xb0 [ 31.766164][ T305] __kmalloc_node_track_caller+0xb1/0x1e0 [ 31.771909][ T305] kstrdup+0x3b/0x80 [ 31.775807][ T305] f_uac1_opts_c_srate_store+0x11a/0x2a0 [ 31.781442][ T305] configfs_write_iter+0x323/0x410 [ 31.786564][ T305] vfs_write+0x5ef/0xd00 [ 31.790811][ T305] ksys_write+0x14a/0x260 [ 31.795142][ T305] __x64_sys_write+0x7b/0x90 [ 31.799768][ T305] x64_sys_call+0x27b/0x9a0 [ 31.804275][ T305] do_syscall_64+0x4c/0xa0 [ 31.808745][ T305] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 31.814654][ T305] [ 31.817055][ T305] The buggy address belongs to the object at ffff88810fada680 [ 31.817055][ T305] which belongs to the cache kmalloc-64 of size 64 [ 31.831028][ T305] The buggy address is located 19 bytes inside of [ 31.831028][ T305] 64-byte region [ffff88810fada680, ffff88810fada6c0) [ 31.844137][ T305] [ 31.846467][ T305] The buggy address belongs to the physical page: [ 31.852875][ T305] page:ffffea00043eb680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fada [ 31.863168][ T305] flags: 0x4000000000000200(slab|zone=1) [ 31.868858][ T305] raw: 4000000000000200 ffffea0004388dc0 dead000000000003 ffff888100042780 [ 31.877614][ T305] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 31.886236][ T305] page dumped because: kasan: bad access detected [ 31.892653][ T305] page_owner tracks the page as allocated [ 31.898358][ T305] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 81, tgid 81 (rcS), ts 5507695646, free_ts 5503364603 [ 31.915371][ T305] post_alloc_hook+0x1f5/0x210 [ 31.920143][ T305] prep_new_page+0x1c/0x110 [ 31.924650][ T305] get_page_from_freelist+0x2ca9/0x2d20 [ 31.930231][ T305] __alloc_pages+0x1fa/0x610 [ 31.934826][ T305] alloc_slab_page+0x6e/0xf0 [ 31.939420][ T305] new_slab+0x98/0x3e0 [ 31.943940][ T305] ___slab_alloc+0x70f/0xb70 [ 31.948547][ T305] __slab_alloc+0x5e/0xa0 [ 31.952902][ T305] __kmem_cache_alloc_node+0x204/0x2d0 [ 31.958371][ T305] __kmalloc+0xa4/0x1e0 [ 31.962538][ T305] ext4_htree_store_dirent+0x8d/0x650 [ 31.967909][ T305] htree_dirblock_to_tree+0x8cc/0xee0 [ 31.973464][ T305] ext4_htree_fill_tree+0x60f/0x10e0 [ 31.978772][ T305] ext4_readdir+0x2d9f/0x3c10 [ 31.983446][ T305] iterate_dir+0x26d/0x610 [ 31.987873][ T305] __se_sys_getdents64+0xf2/0x250 [ 31.992899][ T305] page last free stack trace: [ 31.997587][ T305] free_unref_page_prepare+0x81b/0x820 [ 32.003054][ T305] free_unref_page+0x93/0x530 [ 32.007736][ T305] __free_pages+0x67/0x100 [ 32.012153][ T305] __vunmap+0xa3c/0xc00 [ 32.016307][ T305] free_work+0x5a/0x80 [ 32.020438][ T305] process_one_work+0x717/0xc30 [ 32.025305][ T305] worker_thread+0xa4d/0x11d0 [ 32.029996][ T305] kthread+0x281/0x320 [ 32.034093][ T305] ret_from_fork+0x1f/0x30 [ 32.038550][ T305] [ 32.040886][ T305] Memory state around the buggy address: [ 32.046510][ T305] ffff88810fada580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.054571][ T305] ffff88810fada600: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.062627][ T305] >ffff88810fada680: 00 00 00 00 00 02 fc fc fc fc fc fc fc fc fc fc [ 32.070682][ T305] ^ [ 32.075270][ T305] ffff88810fada700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc write(3, "\x74\xea\x32\xaf\x73\x32\x58\x9d\xcf\x01\x6a\x58\xb4\x28\x3c\x5f\xcd\x68\x2c\xcc\xf4\xc1\x2a\xe3\x96\x83\x41\xcd\x6d\x2f\x74\xd4\x27\x1d\x27\x77\xba\xb0\x6e\x99\x5e", 41) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [ 32.083329][ T305] ffff88810fada780: 00 00 00 00 00 00 00 00 fc fc fc fc