ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor1245531160 <...> syzkaller syzkaller login: [ 15.123707][ T28] kauditd_printk_skb: 31 callbacks suppressed [ 15.123725][ T28] audit: type=1400 audit(1792332276.646:59): avc: denied { transition } for pid=225 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 [ 15.129938][ T28] audit: type=1400 audit(1792332276.646:60): avc: denied { noatsecure } for pid=225 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.133797][ T28] audit: type=1400 audit(1792332276.656:61): avc: denied { write } for pid=225 comm="sh" path="pipe:[14537]" dev="pipefs" ino=14537 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 15.137325][ T28] audit: type=1400 audit(1792332276.656:62): avc: denied { rlimitinh } for pid=225 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.140654][ T28] audit: type=1400 audit(1792332276.656:63): avc: denied { siginh } for pid=225 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.188' (ED25519) to the list of known hosts. execve("ci2-android-6-1/syz-executor1245531160", ["ci2-android-6-1/syz-executor1245531160"], 0x7ffe93fe0a30 /* 10 vars */) = 0 brk(NULL) = 0x55557f41c000 brk(0x55557f41cd40) = 0x55557f41cd40 arch_prctl(ARCH_SET_FS, 0x55557f41c3c0) = 0 set_tid_address(0x55557f41c690) = 305 set_robust_list(0x55557f41c6a0, 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-executor1245531160", 4096) = 44 getrandom("\x9b\xd6\x00\x9c\x47\x12\x33\xb8", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557f41cd40 brk(0x55557f43dd40) = 0x55557f43dd40 brk(0x55557f43e000) = 0x55557f43e000 mprotect(0x7f8058a72000, 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, "./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/p_srate", O_WRONLY) = 3 executing program [ 25.320943][ T28] audit: type=1400 audit(1792332286.846:64): avc: denied { execmem } for pid=305 comm="syz-executor124" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.336178][ T305] ================================================================== [ 25.341966][ T28] audit: type=1400 audit(1792332286.846:65): avc: denied { mounton } for pid=305 comm="syz-executor124" path="/root/myconfig" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 25.348649][ T305] BUG: KASAN: invalid-free in __kmem_cache_free+0xb7/0x1b0 [ 25.348712][ T305] Free of addr ffff88810d861601 by task syz-executor124/305 [ 25.348725][ T305] [ 25.348731][ T305] CPU: 1 PID: 305 Comm: syz-executor124 Not tainted syzkaller #0 [ 25.348751][ T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 [ 25.348769][ T305] Call Trace: [ 25.373524][ T28] audit: type=1400 audit(1792332286.846:66): avc: denied { mount } for pid=305 comm="syz-executor124" name="/" dev="configfs" ino=12280 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=filesystem permissive=1 [ 25.379069][ T305] [ 25.379078][ T305] __dump_stack+0x21/0x24 [ 25.386777][ T28] audit: type=1400 audit(1792332286.846:67): avc: denied { search } for pid=305 comm="syz-executor124" name="/" dev="configfs" ino=12280 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 25.388723][ T305] dump_stack_lvl+0x110/0x170 [ 25.396468][ T28] audit: type=1400 audit(1792332286.846:68): avc: denied { write } for pid=305 comm="syz-executor124" name="usb_gadget" dev="configfs" ino=12281 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 25.406543][ T305] ? __cfi_dump_stack_lvl+0x8/0x8 [ 25.406577][ T305] print_address_description+0x71/0x200 [ 25.411161][ T28] audit: type=1400 audit(1792332286.846:69): avc: denied { add_name } for pid=305 comm="syz-executor124" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=dir permissive=1 [ 25.432800][ T305] print_report+0x4a/0x60 [ 25.432842][ T305] ? __kmem_cache_free+0xb7/0x1b0 [ 25.436492][ T28] audit: type=1400 audit(1792332286.846:70): avc: denied { create } for pid=305 comm="syz-executor124" name="g1" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:configfs_t tclass=dir permissive=1 [ 25.440124][ T305] kasan_report_invalid_free+0xd5/0xf0 [ 25.440156][ T305] ? __kmem_cache_free+0xb7/0x1b0 [ 25.463677][ T28] audit: type=1400 audit(1792332286.856:71): avc: denied { write } for pid=305 comm="syz-executor124" name="p_srate" dev="configfs" ino=15429 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 25.467841][ T305] ? __kmem_cache_free+0xb7/0x1b0 [ 25.498257][ T28] audit: type=1400 audit(1792332286.856:72): avc: denied { open } for pid=305 comm="syz-executor124" path="/root/myconfig/usb_gadget/g1/functions/uac2.usb0/p_srate" dev="configfs" ino=15429 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:configfs_t tclass=file permissive=1 [ 25.501511][ T305] ____kasan_slab_free+0x14f/0x180 [ 25.622106][ T305] __kasan_slab_free+0x11/0x20 [ 25.626889][ T305] slab_free_freelist_hook+0xc2/0x190 [ 25.632269][ T305] ? f_uac2_opts_p_srate_store+0x220/0x2a0 [ 25.638528][ T305] __kmem_cache_free+0xb7/0x1b0 [ 25.643386][ T305] kfree+0x6f/0xf0 [ 25.647105][ T305] f_uac2_opts_p_srate_store+0x220/0x2a0 [ 25.652745][ T305] ? __cfi_f_uac2_opts_p_srate_store+0x10/0x10 [ 25.658907][ T305] ? down_read+0xa6/0xf0 [ 25.663154][ T305] ? __cfi_down_read+0x10/0x10 [ 25.667922][ T305] ? avc_policy_seqno+0x1b/0x70 [ 25.672774][ T305] ? selinux_file_permission+0x2a5/0x510 [ 25.678429][ T305] configfs_write_iter+0x323/0x410 [ 25.683536][ T305] ? __cfi_f_uac2_opts_p_srate_store+0x10/0x10 [ 25.689715][ T305] do_iter_write+0x65a/0xb30 [ 25.694310][ T305] ? _copy_from_user+0x8f/0xc0 [ 25.699074][ T305] ? vfs_iter_write+0xa0/0xa0 [ 25.703752][ T305] ? import_iovec+0x7c/0xb0 [ 25.708262][ T305] vfs_writev+0x339/0x5f0 [ 25.712598][ T305] ? do_writev+0x2c0/0x2c0 [ 25.717014][ T305] ? memset+0x35/0x40 [ 25.720992][ T305] ? ptrace_stop+0x6dc/0x8e0 [ 25.725584][ T305] ? __kasan_check_read+0x11/0x20 [ 25.730610][ T305] ? __fdget+0x15b/0x220 [ 25.734862][ T305] __x64_sys_pwritev+0x19b/0x2b0 [ 25.739804][ T305] ? __cfi___x64_sys_pwritev+0x10/0x10 [ 25.745273][ T305] ? fpregs_restore_userregs+0x128/0x260 [ 25.750908][ T305] x64_sys_call+0x695/0x9a0 [ 25.755428][ T305] do_syscall_64+0x4c/0xa0 [ 25.759937][ T305] ? clear_bhb_loop+0x30/0x80 [ 25.764616][ T305] ? clear_bhb_loop+0x30/0x80 [ 25.769311][ T305] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 25.775309][ T305] RIP: 0033:0x7f80589e1cf9 [ 25.779752][ 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 [ 25.799392][ T305] RSP: 002b:00007ffe52d79b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 [ 25.807833][ T305] RAX: ffffffffffffffda RBX: d7ceab0f2931992c RCX: 00007f80589e1cf9 [ 25.815894][ T305] RDX: 0000000000000001 RSI: 0000200000000040 RDI: 0000000000000003 [ 25.823869][ T305] RBP: 0000000000000001 R08: 0000000000000006 R09: 00007ffe52d79c58 [ 25.831843][ T305] R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffe52d79c48 [ 25.839836][ T305] R13: 0000000000000002 R14: 00007f8058a72ca0 R15: 0000000000000002 [ 25.847815][ T305] [ 25.850833][ T305] [ 25.853156][ T305] Allocated by task 305: [ 25.857391][ T305] kasan_set_track+0x4b/0x70 [ 25.862008][ T305] kasan_save_alloc_info+0x1f/0x30 [ 25.867479][ T305] __kasan_kmalloc+0x95/0xb0 [ 25.872072][ T305] __kmalloc_node_track_caller+0xb1/0x1e0 [ 25.877819][ T305] kstrdup+0x3b/0x80 [ 25.881722][ T305] f_uac2_opts_p_srate_store+0x11a/0x2a0 [ 25.887361][ T305] configfs_write_iter+0x323/0x410 [ 25.892468][ T305] do_iter_write+0x65a/0xb30 [ 25.897074][ T305] vfs_writev+0x339/0x5f0 [ 25.901402][ T305] __x64_sys_pwritev+0x19b/0x2b0 [ 25.906341][ T305] x64_sys_call+0x695/0x9a0 [ 25.910849][ T305] do_syscall_64+0x4c/0xa0 [ 25.915263][ T305] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 25.921155][ T305] [ 25.923478][ T305] The buggy address belongs to the object at ffff88810d861600 [ 25.923478][ T305] which belongs to the cache kmalloc-16 of size 16 [ 25.937350][ T305] The buggy address is located 1 bytes inside of [ 25.937350][ T305] 16-byte region [ffff88810d861600, ffff88810d861610) [ 25.950449][ T305] [ 25.952804][ T305] The buggy address belongs to the physical page: [ 25.960090][ T305] page:ffffea0004361840 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d861 [ 25.970524][ T305] flags: 0x4000000000000200(slab|zone=1) [ 25.976293][ T305] raw: 4000000000000200 ffffea0004361500 dead000000000002 ffff888100042480 [ 25.984883][ T305] raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000 [ 25.993463][ T305] page dumped because: kasan: bad access detected [ 25.999891][ T305] page_owner tracks the page as allocated [ 26.005597][ T305] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 2655920809, free_ts 0 [ 26.022265][ T305] post_alloc_hook+0x1f5/0x210 [ 26.027054][ T305] prep_new_page+0x1c/0x110 [ 26.031561][ T305] get_page_from_freelist+0x2ca9/0x2d20 [ 26.037108][ T305] __alloc_pages+0x1fa/0x610 [ 26.041723][ T305] alloc_slab_page+0x6e/0xf0 [ 26.046329][ T305] new_slab+0x98/0x3e0 [ 26.050422][ T305] ___slab_alloc+0x70f/0xb70 [ 26.055036][ T305] __slab_alloc+0x5e/0xa0 [ 26.059393][ T305] __kmem_cache_alloc_node+0x204/0x2d0 [ 26.064858][ T305] __kmalloc_node_track_caller+0xa1/0x1e0 [ 26.070574][ T305] kvasprintf+0xe8/0x1a0 [ 26.074821][ T305] kvasprintf_const+0xf2/0x240 [ 26.079602][ T305] kobject_set_name_vargs+0x61/0x110 [ 26.084885][ T305] dev_set_name+0xdf/0x130 [ 26.089302][ T305] scsi_alloc_target+0x205/0xbe0 [ 26.094243][ T305] __scsi_scan_target+0x168/0xc20 [ 26.099289][ T305] page_owner free stack trace missing [ 26.104648][ T305] [ 26.106965][ T305] Memory state around the buggy address: [ 26.112588][ T305] ffff88810d861500: fb fb fc fc fa fb fc fc fb fb fc fc fa fb fc fc [ 26.120661][ T305] ffff88810d861580: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc [ 26.128718][ T305] >ffff88810d861600: 00 02 fc fc fa fb fc fc fa fb fc fc fb fb fc fc [ 26.136767][ T305] ^ [ 26.140827][ T305] ffff88810d861680: fa fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc [ 26.148881][ T305] ffff88810d861700: fb fb fc fc fa fb fc fc fa fb fc fc fb fb fc fc [ 26.156938][ T305] ================================================================== [ 26.165230][ T305] Disabling lock debugging due to kernel taint pwritev(3, [{iov_base="\x2c\x99\x31\x29\x0f\xab\xce\xd7\x7c", iov_len=9}], 1, 1) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [