ci2-android-6-1/strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ci2-android-6-1/syz-executor2510779327 <...> Warning: Permanently added '10.128.0.9' (ED25519) to the list of known hosts. execve("ci2-android-6-1/syz-executor2510779327", ["ci2-android-6-1/syz-executor2510779327"], 0x7ffef6d4ec10 /* 10 vars */) = 0 brk(NULL) = 0x55558e736000 brk(0x55558e736d40) = 0x55558e736d40 arch_prctl(ARCH_SET_FS, 0x55558e7363c0) = 0 set_tid_address(0x55558e736690) = 305 set_robust_list(0x55558e7366a0, 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-executor2510779327", 4096) = 44 getrandom("\xab\x22\x56\x7d\xf8\x48\x63\xf0", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558e736d40 brk(0x55558e757d40) = 0x55558e757d40 brk(0x55558e758000) = 0x55558e758000 mprotect(0x7fd70a3f6000, 20480, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 executing program 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 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd701f4a000 write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 munmap(0x7fd701f4a000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file2", 0777) = 0 [ 34.301551][ T28] audit: type=1400 audit(1789390902.773:64): avc: denied { execmem } for pid=305 comm="syz-executor251" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 34.304511][ T305] loop0: detected capacity change from 0 to 512 [ 34.321587][ T28] audit: type=1400 audit(1789390902.783:65): avc: denied { read write } for pid=305 comm="syz-executor251" name="loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 34.329543][ T305] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 34.360030][ T28] audit: type=1400 audit(1789390902.783:66): avc: denied { open } for pid=305 comm="syz-executor251" path="/dev/loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 34.364987][ T305] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 34.389493][ T28] audit: type=1400 audit(1789390902.783:67): avc: denied { ioctl } for pid=305 comm="syz-executor251" path="/dev/loop0" dev="devtmpfs" ino=118 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 34.405226][ T305] EXT4-fs (loop0): revision level too high, forcing read-only mode mount("/dev/loop0", "./file2", "ext4", MS_NODEV|MS_NOATIME, "block_validity,,errors=continue") = 0 openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 chdir("./file2") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 chdir("./file0") = 0 openat(AT_FDCWD, ".", O_RDONLY) = 4 lseek(4, -4, SEEK_END) = 56 [ 34.429056][ T28] audit: type=1400 audit(1789390902.803:68): avc: denied { mounton } for pid=305 comm="syz-executor251" path="/root/file2" dev="sda1" ino=2025 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 34.432854][ T305] EXT4-fs (loop0): orphan cleanup on readonly fs [ 34.461265][ T305] EXT4-fs (loop0): 1 truncate cleaned up [ 34.467180][ T305] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. [ 34.475831][ T28] audit: type=1400 audit(1789390902.953:69): avc: denied { mount } for pid=305 comm="syz-executor251" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 34.478700][ T305] ================================================================== [ 34.505791][ T305] BUG: KASAN: slab-out-of-bounds in __ext4_check_dir_entry+0x7e3/0x990 [ 34.514033][ T305] Read of size 2 at addr ffff88810fc2d6bc by task syz-executor251/305 [ 34.522162][ T305] [ 34.524467][ T305] CPU: 0 PID: 305 Comm: syz-executor251 Not tainted syzkaller #0 [ 34.532184][ T305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 34.542342][ T305] Call Trace: [ 34.545605][ T305] [ 34.548515][ T305] __dump_stack+0x21/0x24 [ 34.552850][ T305] dump_stack_lvl+0x110/0x170 [ 34.557506][ T305] ? __cfi_dump_stack_lvl+0x8/0x8 [ 34.562510][ T305] ? __cfi__printk+0x8/0x8 [ 34.566904][ T305] ? __ext4_check_dir_entry+0x7e3/0x990 [ 34.572426][ T305] print_address_description+0x71/0x200 [ 34.577986][ T305] print_report+0x4a/0x60 [ 34.582313][ T305] kasan_report+0x122/0x150 [ 34.586817][ T305] ? __ext4_check_dir_entry+0x7e3/0x990 [ 34.592365][ T305] __asan_report_load2_noabort+0x14/0x20 [ 34.597993][ T305] __ext4_check_dir_entry+0x7e3/0x990 [ 34.603356][ T305] ? __kasan_kmalloc+0x95/0xb0 [ 34.608132][ T305] ext4_read_inline_dir+0x937/0xd90 [ 34.613314][ T305] ? __cfi_ext4_read_inline_dir+0x10/0x10 [ 34.619015][ T305] ? kvm_sched_clock_read+0x18/0x40 [ 34.624215][ T305] ext4_readdir+0x3c2/0x3c10 [ 34.628785][ T305] ? save_fpregs_to_fpstate+0x199/0x220 [ 34.634331][ T305] ? __cfi___switch_to+0x10/0x10 [ 34.639250][ T305] ? __cfi_ext4_readdir+0x10/0x10 [ 34.644272][ T305] ? __kasan_check_write+0x14/0x20 [ 34.649366][ T305] ? rwsem_read_trylock+0x2af/0x640 [ 34.654545][ T305] ? downgrade_write+0x370/0x370 [ 34.659465][ T305] ? down_read_killable+0xbc/0x110 [ 34.664554][ T305] ? __cfi_down_read_killable+0x10/0x10 [ 34.670103][ T305] ? security_file_permission+0x94/0xb0 [ 34.675632][ T305] iterate_dir+0x26d/0x610 [ 34.680047][ T305] ? __cfi_ext4_readdir+0x10/0x10 [ 34.685049][ T305] __se_sys_getdents+0xf2/0x250 [ 34.689882][ T305] ? __x64_sys_getdents+0x90/0x90 [ 34.694882][ T305] ? xfd_validate_state+0x70/0x150 [ 34.699975][ T305] ? __cfi_filldir+0x10/0x10 [ 34.704542][ T305] ? fpregs_restore_userregs+0x128/0x260 [ 34.710171][ T305] __x64_sys_getdents+0x7b/0x90 [ 34.715035][ T305] x64_sys_call+0x212/0x9a0 [ 34.719525][ T305] do_syscall_64+0x4c/0xa0 [ 34.723924][ T305] ? clear_bhb_loop+0x30/0x80 [ 34.728584][ T305] ? clear_bhb_loop+0x30/0x80 [ 34.733243][ T305] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 34.739127][ T305] RIP: 0033:0x7fd70a36d2c9 [ 34.743537][ 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 [ 34.763120][ T305] RSP: 002b:00007ffda92af0d8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e [ 34.771514][ T305] RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007fd70a36d2c9 [ 34.779484][ T305] RDX: 0000000000000054 RSI: 0000000000000000 RDI: 0000000000000004 [ 34.787431][ T305] RBP: 0000000000000001 R08: 00007ffda92af208 R09: 00007ffda92af208 [ 34.795404][ T305] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffda92af1f8 [ 34.803466][ T305] R13: 0000000000000002 R14: 00007fd70a3f6c80 R15: 0000000000000002 [ 34.811445][ T305] [ 34.814449][ T305] [ 34.816754][ T305] Allocated by task 305: [ 34.820972][ T305] kasan_set_track+0x4b/0x70 [ 34.825549][ T305] kasan_save_alloc_info+0x1f/0x30 [ 34.830728][ T305] __kasan_kmalloc+0x95/0xb0 [ 34.835300][ T305] __kmalloc+0xb4/0x1e0 [ 34.839433][ T305] ext4_read_inline_dir+0x2b6/0xd90 [ 34.844607][ T305] ext4_readdir+0x3c2/0x3c10 [ 34.849180][ T305] iterate_dir+0x26d/0x610 [ 34.853577][ T305] __se_sys_getdents+0xf2/0x250 [ 34.858404][ T305] __x64_sys_getdents+0x7b/0x90 [ 34.863233][ T305] x64_sys_call+0x212/0x9a0 [ 34.867712][ T305] do_syscall_64+0x4c/0xa0 [ 34.872106][ T305] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 34.877976][ T305] [ 34.880280][ T305] The buggy address belongs to the object at ffff88810fc2d680 [ 34.880280][ T305] which belongs to the cache kmalloc-64 of size 64 [ 34.894154][ T305] The buggy address is located 60 bytes inside of [ 34.894154][ T305] 64-byte region [ffff88810fc2d680, ffff88810fc2d6c0) [ 34.907237][ T305] [ 34.909539][ T305] The buggy address belongs to the physical page: [ 34.915941][ T305] page:ffffea00043f0b40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fc2d [ 34.926168][ T305] flags: 0x4000000000000200(slab|zone=1) [ 34.931786][ T305] raw: 4000000000000200 ffffea000439df00 dead000000000005 ffff888100042780 [ 34.940344][ T305] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 34.948898][ T305] page dumped because: kasan: bad access detected [ 34.955294][ T305] page_owner tracks the page as allocated [ 34.960989][ T305] page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 81, tgid 81 (rcS), ts 3568061060, free_ts 0 [ 34.977215][ T305] post_alloc_hook+0x1f5/0x210 [ 34.981964][ T305] prep_new_page+0x1c/0x110 [ 34.986447][ T305] get_page_from_freelist+0x2ca9/0x2d20 [ 34.991971][ T305] __alloc_pages+0x1fa/0x610 [ 34.996559][ T305] alloc_slab_page+0x6e/0xf0 [ 35.001121][ T305] new_slab+0x98/0x3e0 [ 35.005170][ T305] ___slab_alloc+0x70f/0xb70 [ 35.009739][ T305] __slab_alloc+0x5e/0xa0 [ 35.014044][ T305] __kmem_cache_alloc_node+0x204/0x2d0 [ 35.019479][ T305] __kmalloc+0xa4/0x1e0 [ 35.023634][ T305] ext4_htree_store_dirent+0x8d/0x650 [ 35.028984][ T305] htree_dirblock_to_tree+0x8cc/0xee0 [ 35.034335][ T305] ext4_htree_fill_tree+0x60f/0x10e0 [ 35.039598][ T305] ext4_readdir+0x2d9f/0x3c10 [ 35.044265][ T305] iterate_dir+0x26d/0x610 [ 35.048680][ T305] __se_sys_getdents64+0xf2/0x250 [ 35.053701][ T305] page_owner free stack trace missing [ 35.059043][ T305] [ 35.061342][ T305] Memory state around the buggy address: [ 35.066961][ T305] ffff88810fc2d580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.075017][ T305] ffff88810fc2d600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.083070][ T305] >ffff88810fc2d680: 00 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc [ 35.091103][ T305] ^ [ 35.096966][ T305] ffff88810fc2d700: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.105003][ T305] ffff88810fc2d780: 00 00 00 00 00 00 00 02 fc fc fc fc fc fc fc fc [ 35.113034][ T305] ================================================================== [ 35.121397][ T305] Disabling lock debugging due to kernel taint [ 35.125848][ T28] audit: type=1400 audit(1789390903.603:70): avc: denied { read } for pid=85 comm="syslogd" name="log" dev="sda1" ino=2010 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 getdents(4, NULL /* 0 entries */, 84) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 35.127610][ T305] EXT4-fs error (device loop0): ext4_read_inline_