./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1112418829 <...> Warning: Permanently added '10.128.1.28' (ED25519) to the list of known hosts. execve("./syz-executor1112418829", ["./syz-executor1112418829"], 0x7ffd5b70a890 /* 10 vars */) = 0 brk(NULL) = 0x555593922000 brk(0x555593922d00) = 0x555593922d00 arch_prctl(ARCH_SET_FS, 0x555593922380) = 0 set_tid_address(0x555593922650) = 288 set_robust_list(0x555593922660, 24) = 0 rseq(0x555593922ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1112418829", 4096) = 28 getrandom("\xe6\xce\x7e\xda\xeb\x5e\x1c\x80", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555593922d00 brk(0x555593943d00) = 0x555593943d00 brk(0x555593944000) = 0x555593944000 mprotect(0x7f3809197000, 16384, 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", 18executing program ) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3800ce7000 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(0x7f3800ce7000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 22.685873][ T30] audit: type=1400 audit(1751506718.047:64): avc: denied { execmem } for pid=288 comm="syz-executor111" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.703716][ T288] loop0: detected capacity change from 0 to 512 [ 22.707046][ T30] audit: type=1400 audit(1751506718.067:65): avc: denied { read write } for pid=288 comm="syz-executor111" name="loop0" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 close(4) = 0 mkdir("./file2", 0777) = 0 [ 22.735775][ T30] audit: type=1400 audit(1751506718.067:66): avc: denied { open } for pid=288 comm="syz-executor111" path="/dev/loop0" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 22.759938][ T30] audit: type=1400 audit(1751506718.067:67): avc: denied { ioctl } for pid=288 comm="syz-executor111" path="/dev/loop0" dev="devtmpfs" ino=116 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 22.787344][ T30] audit: type=1400 audit(1751506718.157:68): avc: denied { mounton } for pid=288 comm="syz-executor111" path="/root/file2" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 22.813509][ T288] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 22.826655][ T288] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 22.838763][ T288] EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2825: Unable to expand inode 15. Delete some EAs or run e2fsck. [ 22.851959][ T288] EXT4-fs (loop0): 1 truncate cleaned up [ 22.857666][ T288] EXT4-fs (loop0): mounted filesystem without journal. Opts: init_itable=0x0000000000000000,jqfmt=vfsold,debug_want_extra_isize=0x000000000000006a,user_xattr,errors=remount-ro,quota,. Quota mode: writeback. mount("/dev/loop0", "./file2", "ext4", MS_NODEV|MS_NOATIME, "init_itable=0x0000000000000000,jqfmt=vfsold,debug_want_extra_isize=0x000000000000006a,user_xattr,err"...) = 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 lsetxattr("./file1", "trusted.overlay.upper", "\x2e\x2f\x66\x69\x6c\x65\x31\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\x69\x6e\x69\x74\x5f\x69\x74\x61\x62\x6c\x65\x3d\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x2c\x6a\x71\x66\x6d\x74"..., 865, 0) = 0 creat("./file2", 043) = 4 [ 22.878057][ T30] audit: type=1400 audit(1751506718.247:69): avc: denied { mount } for pid=288 comm="syz-executor111" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 22.883432][ T288] ================================================================== [ 22.907969][ T288] BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x13a3/0x37d0 [ 22.908890][ T30] audit: type=1400 audit(1751506718.247:70): avc: denied { setattr } for pid=288 comm="syz-executor111" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 22.915824][ T288] Read of size 18446744073709551540 at addr ffff8881047aa870 by task syz-executor111/288 [ 22.938716][ T30] audit: type=1400 audit(1751506718.247:71): avc: denied { write } for pid=288 comm="syz-executor111" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 22.948119][ T288] [ 22.948139][ T288] CPU: 1 PID: 288 Comm: syz-executor111 Not tainted 5.15.185-syzkaller-00032-g0d918fa8e88d #0 [ 22.970203][ T30] audit: type=1400 audit(1751506718.247:72): avc: denied { add_name } for pid=288 comm="syz-executor111" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 22.972255][ T288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 23.013505][ T288] Call Trace: [ 23.016790][ T288] [ 23.019727][ T288] __dump_stack+0x21/0x30 [ 23.024064][ T288] dump_stack_lvl+0xee/0x150 [ 23.028657][ T288] ? show_regs_print_info+0x20/0x20 [ 23.033855][ T288] ? load_image+0x3a0/0x3a0 [ 23.038361][ T288] ? unwind_get_return_address+0x4d/0x90 [ 23.044002][ T288] print_address_description+0x7f/0x2c0 [ 23.049549][ T288] ? ext4_xattr_set_entry+0x13a3/0x37d0 [ 23.055095][ T288] kasan_report+0xf1/0x140 [ 23.059512][ T288] ? ext4_xattr_set_entry+0x13a3/0x37d0 [ 23.065065][ T288] ? ext4_xattr_set_entry+0x13a3/0x37d0 [ 23.070688][ T288] kasan_check_range+0x280/0x290 [ 23.075651][ T288] memmove+0x2d/0x70 [ 23.079565][ T288] ext4_xattr_set_entry+0x13a3/0x37d0 [ 23.084947][ T288] ? __kasan_kmalloc+0xda/0x110 [ 23.089804][ T288] ? __kmalloc_track_caller+0x13c/0x2c0 [ 23.095354][ T288] ? kmemdup+0x26/0x60 [ 23.099429][ T288] ? setxattr+0x261/0x300 [ 23.103764][ T288] ? x64_sys_call+0x8cc/0x9a0 [ 23.108457][ T288] ? do_syscall_64+0x4c/0xa0 [ 23.113066][ T288] ? ext4_xattr_ibody_set+0x360/0x360 [ 23.118446][ T288] ? __kmalloc_track_caller+0x13c/0x2c0 [ 23.124034][ T288] ? memcpy+0x56/0x70 [ 23.128037][ T288] ext4_xattr_block_set+0x8cd/0x2cb0 [ 23.133340][ T288] ? errseq_check+0x41/0x80 [ 23.137855][ T288] ? ext4_xattr_block_find+0x4f0/0x4f0 [ 23.143319][ T288] ? __kasan_check_write+0x14/0x20 [ 23.148433][ T288] ext4_xattr_set_handle+0xba5/0x12b0 [ 23.153840][ T288] ? ext4_xattr_set_entry+0x37d0/0x37d0 [ 23.159404][ T288] ? ext4_xattr_set+0x1f6/0x320 [ 23.164264][ T288] ? __ext4_journal_start_sb+0x154/0x2b0 [ 23.169909][ T288] ext4_xattr_set+0x22a/0x320 [ 23.174606][ T288] ? ext4_xattr_set_credits+0x290/0x290 [ 23.180163][ T288] ? selinux_inode_setxattr+0x5b4/0xbb0 [ 23.185719][ T288] ext4_xattr_trusted_set+0x3c/0x50 [ 23.190924][ T288] ? ext4_xattr_trusted_get+0x40/0x40 [ 23.196304][ T288] __vfs_setxattr+0x3e1/0x430 [ 23.201015][ T288] __vfs_setxattr_noperm+0x12a/0x5e0 [ 23.206326][ T288] __vfs_setxattr_locked+0x212/0x230 [ 23.211613][ T288] vfs_setxattr+0x168/0x2f0 [ 23.216120][ T288] ? xattr_permission+0x550/0x550 [ 23.221150][ T288] ? _copy_from_user+0x95/0xd0 [ 23.225916][ T288] setxattr+0x2da/0x300 [ 23.230076][ T288] ? path_setxattr+0x280/0x280 [ 23.234840][ T288] ? debug_smp_processor_id+0x17/0x20 [ 23.240219][ T288] ? __mnt_want_write+0x1e6/0x260 [ 23.245243][ T288] ? mnt_want_write+0x20b/0x2e0 [ 23.250097][ T288] path_setxattr+0x142/0x280 [ 23.254695][ T288] ? simple_xattr_list_add+0x120/0x120 [ 23.260155][ T288] ? __kasan_check_write+0x14/0x20 [ 23.265270][ T288] __x64_sys_lsetxattr+0xc2/0xe0 [ 23.270213][ T288] x64_sys_call+0x8cc/0x9a0 [ 23.274718][ T288] do_syscall_64+0x4c/0xa0 [ 23.279142][ T288] ? clear_bhb_loop+0x50/0xa0 [ 23.283821][ T288] ? clear_bhb_loop+0x50/0xa0 [ 23.288500][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 23.294395][ T288] RIP: 0033:0x7f3809124a79 [ 23.298812][ T288] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 [ 23.318538][ T288] RSP: 002b:00007ffc4b50c698 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd [ 23.326977][ T288] RAX: ffffffffffffffda RBX: 00002000000001c0 RCX: 00007f3809124a79 [ 23.334952][ T288] RDX: 0000200000000040 RSI: 0000200000000300 RDI: 0000200000000100 [ 23.342927][ T288] RBP: 0000200000000040 R08: 0000000000000000 R09: 0000000000000000 [ 23.350904][ T288] R10: 000000000000fe37 R11: 0000000000000246 R12: 0072657070752e79 [ 23.358879][ T288] R13: 0032656c69662f2e R14: 0031656c69662f2e R15: 0000000000000001 [ 23.366860][ T288] [ 23.369877][ T288] [ 23.372200][ T288] Allocated by task 288: [ 23.376433][ T288] __kasan_kmalloc+0xda/0x110 [ 23.381115][ T288] __kmalloc_track_caller+0x13c/0x2c0 [ 23.386494][ T288] kmemdup+0x26/0x60 [ 23.390395][ T288] ext4_xattr_block_set+0x7e2/0x2cb0 [ 23.395689][ T288] ext4_xattr_set_handle+0xba5/0x12b0 [ 23.401064][ T288] ext4_xattr_set+0x22a/0x320 [ 23.405745][ T288] ext4_xattr_trusted_set+0x3c/0x50 [ 23.410944][ T288] __vfs_setxattr+0x3e1/0x430 [ 23.415621][ T288] __vfs_setxattr_noperm+0x12a/0x5e0 [ 23.420911][ T288] __vfs_setxattr_locked+0x212/0x230 [ 23.426197][ T288] vfs_setxattr+0x168/0x2f0 [ 23.430704][ T288] setxattr+0x2da/0x300 [ 23.434864][ T288] path_setxattr+0x142/0x280 [ 23.439453][ T288] __x64_sys_lsetxattr+0xc2/0xe0 [ 23.444397][ T288] x64_sys_call+0x8cc/0x9a0 [ 23.448901][ T288] do_syscall_64+0x4c/0xa0 [ 23.453314][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 23.459209][ T288] [ 23.461533][ T288] The buggy address belongs to the object at ffff8881047aa800 [ 23.461533][ T288] which belongs to the cache kmalloc-1k of size 1024 [ 23.475588][ T288] The buggy address is located 112 bytes inside of [ 23.475588][ T288] 1024-byte region [ffff8881047aa800, ffff8881047aac00) [ 23.488954][ T288] The buggy address belongs to the page: [ 23.494595][ T288] page:ffffea000411ea00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1047a8 [ 23.504844][ T288] head:ffffea000411ea00 order:3 compound_mapcount:0 compound_pincount:0 [ 23.513171][ T288] flags: 0x4000000000010200(slab|head|zone=1) [ 23.519256][ T288] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080 [ 23.527841][ T288] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 23.536418][ T288] page dumped because: kasan: bad access detected [ 23.542829][ T288] page_owner tracks the page as allocated [ 23.548535][ T288] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 284, ts 22712890253, free_ts 22712055974 [ 23.567547][ T288] post_alloc_hook+0x192/0x1b0 [ 23.572320][ T288] prep_new_page+0x1c/0x110 [ 23.576826][ T288] get_page_from_freelist+0x2cc5/0x2d50 [ 23.582376][ T288] __alloc_pages+0x18f/0x440 [ 23.586966][ T288] new_slab+0xa1/0x4d0 [ 23.591036][ T288] ___slab_alloc+0x381/0x810 [ 23.595629][ T288] __slab_alloc+0x49/0x90 [ 23.599958][ T288] __kmalloc_track_caller+0x169/0x2c0 [ 23.605333][ T288] __alloc_skb+0x21a/0x740 [ 23.609752][ T288] sk_stream_alloc_skb+0x21a/0xb60 [ 23.614864][ T288] tcp_sendmsg_locked+0xc3e/0x3590 [ 23.619978][ T288] tcp_sendmsg+0x2f/0x50 [ 23.624223][ T288] inet_sendmsg+0xa5/0xc0 [ 23.628556][ T288] sock_write_iter+0x29c/0x380 [ 23.633321][ T288] vfs_write+0x802/0xf70 [ 23.637566][ T288] ksys_write+0x140/0x240 [ 23.641897][ T288] page last free stack trace: [ 23.646565][ T288] free_unref_page_prepare+0x542/0x550 [ 23.652030][ T288] free_unref_page+0xa2/0x550 [ 23.656708][ T288] __free_pages+0x6c/0x100 [ 23.661123][ T288] __free_slab+0xe8/0x1e0 [ 23.665453][ T288] __unfreeze_partials+0x160/0x190 [ 23.670566][ T288] put_cpu_partial+0xc6/0x120 [ 23.675246][ T288] __slab_free+0x1d4/0x290 [ 23.679660][ T288] ___cache_free+0x104/0x120 [ 23.684249][ T288] qlink_free+0x4d/0x90 [ 23.688406][ T288] qlist_free_all+0x5f/0xb0 [ 23.692906][ T288] kasan_quarantine_reduce+0x14a/0x170 [ 23.698369][ T288] __kasan_slab_alloc+0x2f/0xf0 [ 23.703220][ T288] slab_post_alloc_hook+0x4f/0x2b0 [ 23.708337][ T288] kmem_cache_alloc_trace+0xfb/0x270 [ 23.713656][ T288] kobject_uevent_env+0x272/0x700 [ 23.718683][ T288] kobject_uevent+0x1d/0x30 [ 23.723192][ T288] [ 23.725531][ T288] Memory state around the buggy address: [ 23.731156][ T288] ffff8881047aa700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.739245][ T288] ffff8881047aa780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.747304][ T288] >ffff8881047aa800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.755371][ T288] ^ [ 23.763087][ T288] ffff8881047aa880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.771146][ T288] ffff8881047aa900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.779199][ T288] ================================================================== lsetxattr("./file1", "trusted.overlay.upper", "\x65\x78\x74\x34\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"..., 65079, 0) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 23.787256][ T288] Disabling lock debugging due to kernel taint