ci2-android-6-12-rust/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-12-rust/syz-executor3224536220 <...> syzkaller syzkaller login: [ 13.434927][ T36] kauditd_printk_skb: 5 callbacks suppressed [ 13.434942][ T36] audit: type=1400 audit(1792413968.469:59): avc: denied { transition } for pid=231 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 [ 13.438879][ T36] audit: type=1400 audit(1792413968.469:60): avc: denied { noatsecure } for pid=231 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 13.441501][ T36] audit: type=1400 audit(1792413968.469:61): avc: denied { write } for pid=231 comm="sh" path="pipe:[1596]" dev="pipefs" ino=1596 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 13.444479][ T36] audit: type=1400 audit(1792413968.469:62): avc: denied { rlimitinh } for pid=231 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 13.446948][ T36] audit: type=1400 audit(1792413968.469:63): avc: denied { siginh } for pid=231 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.108' (ED25519) to the list of known hosts. execve("ci2-android-6-12-rust/syz-executor3224536220", ["ci2-android-6-12-rust/syz-executor3224536220"], 0x7ffe20264b30 /* 10 vars */) = 0 brk(NULL) = 0x555587cc9000 brk(0x555587cc9d40) = 0x555587cc9d40 arch_prctl(ARCH_SET_FS, 0x555587cc93c0) = 0 set_tid_address(0x555587cc9690) = 312 set_robust_list(0x555587cc96a0, 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-6-12-rust/syz-executor3224536220", 4096) = 50 getrandom("\xaf\xc4\x1f\x14\x0c\x6f\xbb\x82", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555587cc9d40 brk(0x555587cead40) = 0x555587cead40 brk(0x555587ceb000) = 0x555587ceb000 mprotect(0x7f8735e7b000, 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 executing program mkdirat(AT_FDCWD, "./sys", 0777) = 0 mount(NULL, "./sys", "sysfs", 0, NULL) = 0 openat(AT_FDCWD, "./sys/bus/pnp/drivers/serial", O_RDONLY|O_EXCL) = 3 openat(3, "unbind", O_WRONLY) = 4 write(4, "00:03", 5) = 5 openat(3, "bind", O_WRONLY) = 5 write(5, "00:03", 5) = 5 mkdirat(AT_FDCWD, "./myproc", 0777) = 0 mount(NULL, "./myproc", "proc", 0, NULL) = 0 [ 22.243453][ T36] audit: type=1400 audit(1792413977.279:64): avc: denied { execmem } for pid=312 comm="syz-executor322" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.263193][ T312] printk: legacy console [ttyS0] disabled [ 22.276675][ T312] printk: legacy console [ttyS0] enabled openat(AT_FDCWD, "./myproc/interrupts", O_RDONLY) = 6 [ 22.288085][ T36] audit: type=1400 audit(1792413977.319:67): avc: denied { mount } for pid=312 comm="syz-executor322" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1 [ 22.302221][ T312] ================================================================== [ 22.318032][ T312] BUG: KASAN: slab-use-after-free in string+0x20f/0x2b0 [ 22.324984][ T312] Read of size 1 at addr ffff888105a80280 by task syz-executor322/312 [ 22.333229][ T312] [ 22.335548][ T312] CPU: 0 UID: 0 PID: 312 Comm: syz-executor322 Not tainted syzkaller #0 bcd0852b9269e5a174a9e289c8567167f3c3d1d7 [ 22.335562][ T312] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 [ 22.335576][ T312] Call Trace: [ 22.335580][ T312] [ 22.335585][ T312] __dump_stack+0x21/0x30 [ 22.335608][ T312] dump_stack_lvl+0x140/0x1c0 [ 22.335622][ T312] ? __cfi_dump_stack_lvl+0x10/0x10 [ 22.335637][ T312] ? kasan_save_alloc_info+0x3a/0x50 [ 22.335650][ T312] print_address_description+0x71/0x210 [ 22.335665][ T312] print_report+0x4a/0x70 [ 22.335679][ T312] kasan_report+0x162/0x1a0 [ 22.335689][ T312] ? string+0x20f/0x2b0 [ 22.335703][ T312] ? string+0x20f/0x2b0 [ 22.335716][ T312] __asan_report_load1_noabort+0x18/0x20 [ 22.335728][ T312] string+0x20f/0x2b0 [ 22.335741][ T312] vsnprintf+0xe65/0x1ad0 [ 22.335756][ T312] seq_printf+0x189/0x290 [ 22.335767][ T312] ? __cfi_seq_printf+0x10/0x10 [ 22.335777][ T312] ? __kvmalloc_node_noprof+0x173/0x300 [ 22.335790][ T312] show_interrupts+0x6d2/0x7f0 [ 22.335806][ T312] traverse+0x21e/0x700 [ 22.335816][ T312] seq_read_iter+0xdbd/0xf30 [ 22.335826][ T312] ? __cfi___switch_to+0x10/0x10 [ 22.335837][ T312] proc_reg_read_iter+0x1e7/0x2c0 [ 22.335851][ T312] do_iter_readv_writev+0x629/0x820 [ 22.335866][ T312] ? vfs_iter_read+0x5e0/0x5e0 [ 22.335880][ T312] ? bpf_lsm_file_permission+0xd/0x20 [ 22.335891][ T312] vfs_readv+0x301/0xa00 [ 22.335901][ T312] ? __kasan_check_write+0x18/0x20 [ 22.335914][ T312] ? do_readv+0x2e0/0x2e0 [ 22.335924][ T312] ? __asan_memset+0x39/0x50 [ 22.335937][ T312] ? ptrace_stop+0x6d6/0x8f0 [ 22.335950][ T312] ? _raw_spin_unlock_irq+0x45/0x70 [ 22.335960][ T312] ? __kasan_check_read+0x15/0x20 [ 22.335972][ T312] __x64_sys_preadv+0x19f/0x2c0 [ 22.335981][ T312] ? __cfi___x64_sys_preadv+0x10/0x10 [ 22.335996][ T312] x64_sys_call+0x1ee9/0x2ee0 [ 22.336006][ T312] do_syscall_64+0x57/0xf0 [ 22.336015][ T312] ? clear_bhb_loop+0x50/0xa0 [ 22.336028][ T312] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 22.336040][ T312] RIP: 0033:0x7f8735deae39 [ 22.336054][ T312] 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 [ 22.336062][ T312] RSP: 002b:00007ffc3b4211c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 [ 22.336079][ T312] RAX: ffffffffffffffda RBX: 636f7270796d2f2e RCX: 00007f8735deae39 [ 22.336087][ T312] RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000006 [ 22.336094][ T312] RBP: 0000000000000001 R08: 0000000000000004 R09: 00007ffc3b4212f8 [ 22.336100][ T312] R10: 000000000000ffff R11: 0000000000000246 R12: 00007ffc3b4212e8 [ 22.336107][ T312] R13: 0000000000000002 R14: 00007f8735e7bca0 R15: 0000000000000002 [ 22.336114][ T312] [ 22.336118][ T312] [ 22.612962][ T312] Allocated by task 1: [ 22.617006][ T312] kasan_save_track+0x3e/0x80 [ 22.621669][ T312] kasan_save_alloc_info+0x3a/0x50 [ 22.626759][ T312] __kasan_kmalloc+0x96/0xb0 [ 22.631352][ T312] __kmalloc_node_track_caller_noprof+0x24e/0x4f0 [ 22.637749][ T312] kvasprintf+0xf1/0x260 [ 22.641994][ T312] kasprintf+0xe3/0x140 [ 22.646129][ T312] serial_core_register_port+0x83b/0x23c0 [ 22.651825][ T312] serial_ctrl_register_port+0x21/0x30 [ 22.657260][ T312] uart_add_one_port+0x21/0x30 [ 22.662000][ T312] serial8250_register_8250_port+0x17ab/0x21d0 [ 22.668131][ T312] serial_pnp_probe+0x54b/0x750 [ 22.672960][ T312] pnp_device_probe+0x316/0x4e0 [ 22.677788][ T312] really_probe+0x2e1/0x8b0 [ 22.682268][ T312] __driver_probe_device+0x193/0x280 [ 22.687549][ T312] driver_probe_device+0x54/0x3f0 [ 22.692551][ T312] __driver_attach+0x422/0x5e0 [ 22.697294][ T312] bus_for_each_dev+0x246/0x2d0 [ 22.702125][ T312] driver_attach+0x46/0x50 [ 22.706534][ T312] bus_add_driver+0x393/0x730 [ 22.711188][ T312] driver_register+0x2b7/0x3c0 [ 22.715929][ T312] pnp_register_driver+0x81/0x90 [ 22.720851][ T312] serial8250_pnp_init+0x19/0x20 [ 22.725782][ T312] serial8250_init+0xcc/0x1d0 [ 22.730435][ T312] do_one_initcall+0x1e8/0x6a0 [ 22.735176][ T312] do_initcall_level+0x174/0x2e5 [ 22.740098][ T312] do_initcalls+0x7e/0x160 [ 22.744495][ T312] do_basic_setup+0x95/0xb0 [ 22.748981][ T312] kernel_init_freeable+0x2b1/0x400 [ 22.754165][ T312] kernel_init+0x21/0x1e0 [ 22.758474][ T312] ret_from_fork+0x67/0xa0 [ 22.762865][ T312] ret_from_fork_asm+0x1a/0x30 [ 22.767607][ T312] [ 22.769907][ T312] Freed by task 312: [ 22.773773][ T312] kasan_save_track+0x3e/0x80 [ 22.778431][ T312] kasan_save_free_info+0x44/0x50 [ 22.783431][ T312] __kasan_slab_free+0x5f/0x80 [ 22.788165][ T312] kfree+0x158/0x440 [ 22.792036][ T312] serial_core_unregister_port+0x469/0xa50 [ 22.797820][ T312] serial_ctrl_unregister_port+0x21/0x30 [ 22.803429][ T312] uart_remove_one_port+0x21/0x30 [ 22.808431][ T312] serial8250_unregister_port+0x1cc/0x6b0 [ 22.814127][ T312] serial_pnp_remove+0x5d/0xa0 [ 22.818972][ T312] pnp_device_remove+0x8d/0x270 [ 22.823819][ T312] device_release_driver_internal+0x4ad/0x830 [ 22.829881][ T312] device_driver_detach+0x3f/0x50 [ 22.834893][ T312] unbind_store+0x1ab/0x1f0 [ 22.839374][ T312] drv_attr_store+0x91/0xb0 [ 22.843857][ T312] sysfs_kf_write+0x141/0x160 [ 22.848515][ T312] kernfs_fop_write_iter+0x319/0x510 [ 22.853778][ T312] vfs_write+0x762/0xfd0 [ 22.858002][ T312] ksys_write+0x145/0x260 [ 22.862310][ T312] __x64_sys_write+0x7f/0x90 [ 22.866876][ T312] x64_sys_call+0x271c/0x2ee0 [ 22.871530][ T312] do_syscall_64+0x57/0xf0 [ 22.875921][ T312] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 22.881791][ T312] [ 22.884095][ T312] The buggy address belongs to the object at ffff888105a80280 [ 22.884095][ T312] which belongs to the cache kmalloc-8 of size 8 [ 22.897776][ T312] The buggy address is located 0 bytes inside of [ 22.897776][ T312] freed 8-byte region [ffff888105a80280, ffff888105a80288) [ 22.911205][ T312] [ 22.913523][ T312] The buggy address belongs to the physical page: [ 22.919916][ T312] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888105a80400 pfn:0x105a80 [ 22.930076][ T312] flags: 0x4000000000000200(workingset|zone=1) [ 22.936207][ T312] page_type: f5(slab) [ 22.940165][ T312] raw: 4000000000000200 ffff888100041500 ffffea000406c910 ffffea00040ee350 [ 22.948733][ T312] raw: ffff888105a80400 0000000000800041 00000001f5000000 0000000000000000 [ 22.957321][ T312] page dumped because: kasan: bad access detected [ 22.963731][ T312] page_owner tracks the page as allocated [ 22.969425][ T312] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 2606222790, free_ts 0 [ 22.986939][ T312] post_alloc_hook+0x37d/0x3b0 [ 22.991689][ T312] prep_new_page+0x2d/0x180 [ 22.996190][ T312] get_page_from_freelist+0x4aea/0x4ba0 [ 23.001717][ T312] __alloc_pages_noprof+0x35a/0x7e0 [ 23.006896][ T312] alloc_slab_page+0x6b/0x1e0 [ 23.011548][ T312] allocate_slab+0x69/0x430 [ 23.016026][ T312] ___slab_alloc+0x591/0x8c0 [ 23.020598][ T312] __kmalloc_noprof+0x2fc/0x510 [ 23.025430][ T312] acpi_ex_allocate_name_string+0xed/0x420 [ 23.031213][ T312] acpi_ex_get_name_string+0x2a7/0x490 [ 23.036655][ T312] acpi_ds_create_operand+0x16c/0x8c0 [ 23.042023][ T312] acpi_ds_create_operands+0x275/0x420 [ 23.047479][ T312] acpi_ds_eval_buffer_field_operands+0x6b/0x320 [ 23.053785][ T312] acpi_ds_exec_end_op+0x9de/0x1210 [ 23.058960][ T312] acpi_ps_parse_loop+0xc83/0x1ac0 [ 23.064050][ T312] acpi_ps_parse_aml+0x218/0x9b0 [ 23.068968][ T312] page_owner free stack trace missing [ 23.074309][ T312] [ 23.076610][ T312] Memory state around the buggy address: [ 23.082230][ T312] ffff888105a80180: 00 fc fc fc 06 fc fc fc 00 fc fc fc fa fc fc fc preadv(6, [{iov_base="", iov_len=175}], 1, 65535) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 23.090270][ T312] ffff888105a80200: 06 fc fc fc fa fc fc fc fa fc fc fc fa f