ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor3772698405 <...> syzkaller syzkaller login: [ 15.655769][ T28] kauditd_printk_skb: 27 callbacks suppressed [ 15.655784][ T28] audit: type=1400 audit(1790589238.162:59): avc: denied { transition } for pid=226 comm="sshd-session" path="/bin/sh" dev="sda1" ino=90 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.660623][ T28] audit: type=1400 audit(1790589238.162:60): avc: denied { noatsecure } for pid=226 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.664482][ T28] audit: type=1400 audit(1790589238.172:61): avc: denied { write } for pid=226 comm="sh" path="pipe:[13647]" dev="pipefs" ino=13647 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 15.668257][ T28] audit: type=1400 audit(1790589238.172:62): avc: denied { rlimitinh } for pid=226 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.671214][ T28] audit: type=1400 audit(1790589238.172:63): avc: denied { siginh } for pid=226 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.146' (ED25519) to the list of known hosts. execve("ci2-android-6-1/syz-executor3772698405", ["ci2-android-6-1/syz-executor3772698405"], 0x7ffd8b86acb0 /* 10 vars */) = 0 brk(NULL) = 0x55556a3da000 brk(0x55556a3dad40) = 0x55556a3dad40 arch_prctl(ARCH_SET_FS, 0x55556a3da3c0) = 0 set_tid_address(0x55556a3da690) = 306 set_robust_list(0x55556a3da6a0, 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-executor3772698405", 4096) = 44 getrandom("\xff\x31\x07\x9d\x08\xcd\x00\xbd", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556a3dad40 brk(0x55556a3fbd40) = 0x55556a3fbd40 brk(0x55556a3fc000) = 0x55556a3fc000 mprotect(0x7f19a4eca000, 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", 0777) = 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 [ 29.881281][ T28] audit: type=1400 audit(1790589252.392:64): avc: denied { execmem } for pid=306 comm="syz-executor377" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 29.899144][ T306] ================================================================== [ 29.908777][ T306] BUG: KASAN: invalid-free in __kmem_cache_free+0xb7/0x1b0 [ 29.914597][ T28] audit: type=1400 audit(1790589252.402:65): avc: denied { mounton } for pid=306 comm="syz-executor377" path="/root/myconfig" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 29.916050][ T306] Free of addr ffff88810fc39f1f by task syz-executor377/306 [ 29.940302][ T28] audit: type=1400 audit(1790589252.402:66): avc: denied { mount } for pid=306 comm="syz-executor377" name="/" dev="configfs" ino=13364 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=filesystem permissive=1 [ 29.946261][ T306] [ 29.946288][ T306] CPU: 0 PID: 306 Comm: syz-executor377 Not tainted syzkaller #0 [ 29.969960][ T28] audit: type=1400 audit(1790589252.402:67): avc: denied { search } for pid=306 comm="syz-executor377" name="/" dev="configfs" ino=13364 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 29.971715][ T306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 29.979977][ T28] audit: type=1400 audit(1790589252.402:68): avc: denied { write } for pid=306 comm="syz-executor377" name="usb_gadget" dev="configfs" ino=13365 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 30.001863][ T306] Call Trace: [ 30.001873][ T306] [ 30.001881][ T306] __dump_stack+0x21/0x24 [ 30.001914][ T306] dump_stack_lvl+0x110/0x170 [ 30.012860][ T28] audit: type=1400 audit(1790589252.402:69): avc: denied { add_name } for pid=306 comm="syz-executor377" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 30.035071][ T306] ? __cfi_dump_stack_lvl+0x8/0x8 [ 30.035107][ T306] print_address_description+0x71/0x200 [ 30.039000][ T28] audit: type=1400 audit(1790589252.402:70): avc: denied { create } for pid=306 comm="syz-executor377" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:configfs_t tclass=dir permissive=1 [ 30.041345][ T306] print_report+0x4a/0x60 [ 30.045689][ T28] audit: type=1400 audit(1790589252.402:71): avc: denied { read write } for pid=306 comm="syz-executor377" name="c_srate" dev="configfs" ino=15302 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 30.050365][ T306] ? __kmem_cache_free+0xb7/0x1b0 [ 30.050396][ T306] kasan_report_invalid_free+0xd5/0xf0 [ 30.071821][ T28] audit: type=1400 audit(1790589252.402:72): avc: denied { open } for pid=306 comm="syz-executor377" path="/root/myconfig/usb_gadget/g1/functions/uac2.usb0/c_srate" dev="configfs" ino=15302 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 30.075946][ T306] ? __kmem_cache_free+0xb7/0x1b0 [ 30.171615][ T306] ? __kmem_cache_free+0xb7/0x1b0 [ 30.176681][ T306] ____kasan_slab_free+0x14f/0x180 [ 30.181794][ T306] __kasan_slab_free+0x11/0x20 [ 30.186576][ T306] slab_free_freelist_hook+0xc2/0x190 [ 30.191964][ T306] ? f_uac2_opts_c_srate_store+0x220/0x2a0 [ 30.197802][ T306] __kmem_cache_free+0xb7/0x1b0 [ 30.202681][ T306] kfree+0x6f/0xf0 [ 30.206405][ T306] f_uac2_opts_c_srate_store+0x220/0x2a0 [ 30.212130][ T306] ? __cfi_f_uac2_opts_c_srate_store+0x10/0x10 [ 30.218296][ T306] ? down_read+0xa6/0xf0 [ 30.222558][ T306] ? __cfi_down_read+0x10/0x10 [ 30.227334][ T306] ? avc_policy_seqno+0x1b/0x70 [ 30.232201][ T306] ? selinux_file_permission+0x2a5/0x510 [ 30.237852][ T306] configfs_write_iter+0x323/0x410 [ 30.242989][ T306] ? __cfi_f_uac2_opts_c_srate_store+0x10/0x10 [ 30.249162][ T306] vfs_write+0x5ef/0xd00 [ 30.253423][ T306] ? __cfi_vfs_write+0x10/0x10 [ 30.258199][ T306] ? memset+0x35/0x40 [ 30.262217][ T306] ? __kasan_check_read+0x11/0x20 [ 30.267250][ T306] ? __fdget_pos+0x2d4/0x380 [ 30.271856][ T306] ksys_write+0x14a/0x260 [ 30.276195][ T306] ? __cfi_ksys_write+0x10/0x10 [ 30.281058][ T306] ? fpregs_restore_userregs+0x128/0x260 [ 30.286713][ T306] __x64_sys_write+0x7b/0x90 [ 30.291328][ T306] x64_sys_call+0x27b/0x9a0 [ 30.295843][ T306] do_syscall_64+0x4c/0xa0 [ 30.300275][ T306] ? clear_bhb_loop+0x30/0x80 [ 30.304968][ T306] ? clear_bhb_loop+0x30/0x80 [ 30.309681][ T306] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 30.315594][ T306] RIP: 0033:0x7f19a4e39cf9 [ 30.320054][ T306] 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 [ 30.339678][ T306] RSP: 002b:00007ffcf698a398 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 30.348121][ T306] RAX: ffffffffffffffda RBX: 666e6f63796d2f2e RCX: 00007f19a4e39cf9 [ 30.356126][ T306] RDX: 0000000000000020 RSI: 00002000000004c0 RDI: 0000000000000003 [ 30.364115][ T306] RBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffcf698a4c8 [ 30.372109][ T306] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf698a4b8 [ 30.380097][ T306] R13: 0000000000000002 R14: 00007f19a4ecaca0 R15: 0000000000000002 [ 30.388085][ T306] [ 30.391117][ T306] [ 30.393454][ T306] Allocated by task 306: [ 30.397700][ T306] kasan_set_track+0x4b/0x70 [ 30.402314][ T306] kasan_save_alloc_info+0x1f/0x30 [ 30.407441][ T306] __kasan_kmalloc+0x95/0xb0 [ 30.412047][ T306] __kmalloc_node_track_caller+0xb1/0x1e0 [ 30.417782][ T306] kstrdup+0x3b/0x80 [ 30.421714][ T306] f_uac2_opts_c_srate_store+0x11a/0x2a0 [ 30.427370][ T306] configfs_write_iter+0x323/0x410 [ 30.432497][ T306] vfs_write+0x5ef/0xd00 [ 30.436747][ T306] ksys_write+0x14a/0x260 [ 30.441091][ T306] __x64_sys_write+0x7b/0x90 [ 30.445696][ T306] x64_sys_call+0x27b/0x9a0 [ 30.450212][ T306] do_syscall_64+0x4c/0xa0 [ 30.454646][ T306] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 30.460570][ T306] [ 30.462906][ T306] The buggy address belongs to the object at ffff88810fc39f00 [ 30.462906][ T306] which belongs to the cache kmalloc-64 of size 64 [ 30.476809][ T306] The buggy address is located 31 bytes inside of [ 30.476809][ T306] 64-byte region [ffff88810fc39f00, ffff88810fc39f40) [ 30.490222][ T306] [ 30.492569][ T306] The buggy address belongs to the physical page: [ 30.499086][ T306] page:ffffea00043f0e40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88810fc39100 pfn:0x10fc39 [ 30.510662][ T306] flags: 0x4000000000000200(slab|zone=1) [ 30.516325][ T306] raw: 4000000000000200 ffffea00043e40c0 dead000000000006 ffff888100042780 [ 30.524919][ T306] raw: ffff88810fc39100 000000008020001c 00000001ffffffff 0000000000000000 [ 30.533512][ T306] page dumped because: kasan: bad access detected [ 30.539965][ T306] page_owner tracks the page as allocated [ 30.545711][ T306] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 83, tgid 83 (start-stop-daem), ts 4819205345, free_ts 0 [ 30.563008][ T306] post_alloc_hook+0x1f5/0x210 [ 30.567802][ T306] prep_new_page+0x1c/0x110 [ 30.572330][ T306] get_page_from_freelist+0x2ca9/0x2d20 [ 30.577895][ T306] __alloc_pages+0x1fa/0x610 [ 30.582504][ T306] alloc_slab_page+0x6e/0xf0 [ 30.587115][ T306] new_slab+0x98/0x3e0 [ 30.591199][ T306] ___slab_alloc+0x70f/0xb70 [ 30.595808][ T306] __slab_alloc+0x5e/0xa0 [ 30.600154][ T306] __kmem_cache_alloc_node+0x204/0x2d0 [ 30.605631][ T306] __kmalloc_node+0xa2/0x1e0 [ 30.610233][ T306] __vmalloc_node_range+0x564/0x1440 [ 30.615535][ T306] dup_task_struct+0x3ca/0x900 [ 30.620307][ T306] copy_process+0x5e7/0x3500 [ 30.624938][ T306] kernel_clone+0x22f/0x7f0 [ 30.629457][ T306] __ia32_sys_vfork+0xc2/0x120 [ 30.634243][ T306] x64_sys_call+0x434/0x9a0 [ 30.638761][ T306] page_owner free stack trace missing [ 30.644133][ T306] [ 30.646465][ T306] Memory state around the buggy address: [ 30.652107][ T306] ffff88810fc39e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.660179][ T306] ffff88810fc39e80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.668264][ T306] >ffff88810fc39f00: 00 00 00 00 01 fc fc fc fc fc fc fc fc fc fc fc [ 30.676344][ T306] ^ write(3, "44100,48000,88200,96000,176B00,1", 32) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [ 30.681213][ T306] ffff88810fc39f80: