./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor186424175 <...> Warning: Permanently added '10.128.1.90' (ED25519) to the list of known hosts. execve("./syz-executor186424175", ["./syz-executor186424175"], 0x7ffdf688c650 /* 10 vars */) = 0 brk(NULL) = 0x55558f6ce000 brk(0x55558f6ced00) = 0x55558f6ced00 arch_prctl(ARCH_SET_FS, 0x55558f6ce380) = 0 set_tid_address(0x55558f6ce650) = 288 set_robust_list(0x55558f6ce660, 24) = 0 rseq(0x55558f6ceca0, 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-executor186424175", 4096) = 27 getrandom("\x69\xed\xac\x3f\x15\x09\x3d\x3c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558f6ced00 brk(0x55558f6efd00) = 0x55558f6efd00 brk(0x55558f6f0000) = 0x55558f6f0000 mprotect(0x7f30e82e8000, 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) = 0x7f30dfe38000 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(0x7f30dfe38000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 21.475592][ T30] audit: type=1400 audit(1754145771.839:64): avc: denied { execmem } for pid=288 comm="syz-executor186" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.495012][ T30] audit: type=1400 audit(1754145771.859:65): avc: denied { read write } for pid=288 comm="syz-executor186" 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 [ 21.495167][ T288] loop0: detected capacity change from 0 to 512 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file2", 0777) = 0 [ 21.519439][ T30] audit: type=1400 audit(1754145771.859:66): avc: denied { open } for pid=288 comm="syz-executor186" 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 [ 21.549602][ T30] audit: type=1400 audit(1754145771.859:67): avc: denied { ioctl } for pid=288 comm="syz-executor186" 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 [ 21.577006][ T30] audit: type=1400 audit(1754145771.949:68): avc: denied { mounton } for pid=288 comm="syz-executor186" path="/root/file2" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.600031][ T288] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 21.613093][ T288] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 21.624640][ T288] EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2825: Unable to expand inode 15. Delete some EAs or run e2fsck. [ 21.637820][ T288] EXT4-fs (loop0): 1 truncate cleaned up [ 21.643710][ T288] EXT4-fs (loop0): mounted filesystem without journal. Opts: nogrpid,min_batch_time=0x0000000000000000,debug_want_extra_isize=0x0000000000000068,nobarrier,nodiscard,quota,,errors=continue. Quota mode: writeback. mount("/dev/loop0", "./file2", "ext4", MS_NOEXEC|MS_DIRSYNC, "nogrpid,min_batch_time=0x0000000000000000,debug_want_extra_isize=0x0000000000000068,nobarrier,nodisc"...) = 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 truncate("./file2", 0) = 0 lsetxattr("./file1", "trusted.overlay.upper", "\x00\xfb\xcd\x01\x3f\x33\x35\x63\x95\x7f\xde\x9e\x67\x6b\xcf\x88\x1c\xf4\xba\x91\x30\x9a\x6d\x2b\xa0\x67\x6a\x2d\x00\x0e\x48\x2d\xd7\xed\x5c\x99\x9c\x1f\x11\xb1\xf4\x90\x96\xcf\x50\x67\xf6\x75\xf2\xf8\xb3\xd9\x4b\x6b\x40\x8a\x3d\xad\xb6\xeb\x64\x0b\x03\x61\xfa\xf5\xda\xde\x5b\xc7\x73\xd7\xe3\x09\x52\xf3\xe8\x28\xc4\x31\xbf\xf0\x11\xc4\x52\xa2\x9c\xa1\x71\x13\x0e\x5d\x9c\x2f\xd8\x35\x44\x28\x94\x09"..., 205, 0) = 0 [ 21.664415][ T30] audit: type=1400 audit(1754145772.039:69): avc: denied { mount } for pid=288 comm="syz-executor186" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 21.682391][ T288] ================================================================== [ 21.686439][ T30] audit: type=1400 audit(1754145772.049:70): avc: denied { write } for pid=288 comm="syz-executor186" name="file2" dev="loop0" ino=16 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 21.694239][ T288] BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x13a3/0x37d0 [ 21.716790][ T30] audit: type=1400 audit(1754145772.049:71): avc: denied { open } for pid=288 comm="syz-executor186" name="file2" dev="loop0" ino=16 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 21.724308][ T288] Read of size 18446744073709551540 at addr ffff888106384870 by task syz-executor186/288 [ 21.724324][ T288] [ 21.724336][ T288] CPU: 0 PID: 288 Comm: syz-executor186 Not tainted 5.15.189-syzkaller-00091-gf32b52534f1d #0 [ 21.746727][ T30] audit: type=1400 audit(1754145772.049:72): avc: denied { setattr } for pid=288 comm="syz-executor186" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 21.756280][ T288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 21.756300][ T288] Call Trace: [ 21.756305][ T288] [ 21.756311][ T288] __dump_stack+0x21/0x30 [ 21.756329][ T288] dump_stack_lvl+0xee/0x150 [ 21.816327][ T288] ? show_regs_print_info+0x20/0x20 [ 21.821514][ T288] ? load_image+0x3a0/0x3a0 [ 21.826001][ T288] ? unwind_get_return_address+0x4d/0x90 [ 21.831618][ T288] print_address_description+0x7f/0x2c0 [ 21.837141][ T288] ? ext4_xattr_set_entry+0x13a3/0x37d0 [ 21.842666][ T288] kasan_report+0xf1/0x140 [ 21.847060][ T288] ? ext4_xattr_set_entry+0x13a3/0x37d0 [ 21.852582][ T288] ? ext4_xattr_set_entry+0x13a3/0x37d0 [ 21.858113][ T288] kasan_check_range+0x280/0x290 [ 21.863027][ T288] memmove+0x2d/0x70 [ 21.866898][ T288] ext4_xattr_set_entry+0x13a3/0x37d0 [ 21.872245][ T288] ? __kasan_kmalloc+0xda/0x110 [ 21.877074][ T288] ? __kmalloc_track_caller+0x13c/0x2c0 [ 21.882604][ T288] ? kmemdup+0x26/0x60 [ 21.886649][ T288] ? setxattr+0x251/0x300 [ 21.890956][ T288] ? x64_sys_call+0x8cc/0x9a0 [ 21.895609][ T288] ? do_syscall_64+0x4c/0xa0 [ 21.900182][ T288] ? ext4_xattr_ibody_set+0x360/0x360 [ 21.905537][ T288] ? __kmalloc_track_caller+0x13c/0x2c0 [ 21.911071][ T288] ? memcpy+0x56/0x70 [ 21.915046][ T288] ext4_xattr_block_set+0x8cd/0x2cb0 [ 21.920316][ T288] ? errseq_check+0x41/0x80 [ 21.924803][ T288] ? ext4_xattr_block_find+0x4f0/0x4f0 [ 21.930244][ T288] ? __kasan_check_write+0x14/0x20 [ 21.935338][ T288] ext4_xattr_set_handle+0xba5/0x12b0 [ 21.940689][ T288] ? ext4_xattr_set_entry+0x37d0/0x37d0 [ 21.946213][ T288] ? ext4_xattr_set+0x1f6/0x320 [ 21.951040][ T288] ? __ext4_journal_start_sb+0x154/0x2b0 [ 21.956651][ T288] ext4_xattr_set+0x22a/0x320 [ 21.961306][ T288] ? ext4_xattr_set_credits+0x290/0x290 [ 21.967006][ T288] ? selinux_inode_setxattr+0x5b4/0xbb0 [ 21.972530][ T288] ext4_xattr_trusted_set+0x3c/0x50 [ 21.977707][ T288] ? ext4_xattr_trusted_get+0x40/0x40 [ 21.983060][ T288] __vfs_setxattr+0x3e1/0x430 [ 21.987721][ T288] __vfs_setxattr_noperm+0x12a/0x5e0 [ 21.992984][ T288] __vfs_setxattr_locked+0x212/0x230 [ 21.998247][ T288] vfs_setxattr+0x168/0x2f0 [ 22.002729][ T288] ? xattr_permission+0x550/0x550 [ 22.007734][ T288] ? _copy_from_user+0x95/0xd0 [ 22.012480][ T288] setxattr+0x2da/0x300 [ 22.016616][ T288] ? path_setxattr+0x280/0x280 [ 22.021356][ T288] ? debug_smp_processor_id+0x17/0x20 [ 22.026708][ T288] ? __mnt_want_write+0x1e6/0x260 [ 22.031707][ T288] ? mnt_want_write+0x20b/0x2e0 [ 22.036532][ T288] path_setxattr+0x142/0x280 [ 22.041099][ T288] ? simple_xattr_list_add+0x120/0x120 [ 22.046534][ T288] ? __kasan_check_write+0x14/0x20 [ 22.051625][ T288] __x64_sys_lsetxattr+0xc2/0xe0 [ 22.056542][ T288] x64_sys_call+0x8cc/0x9a0 [ 22.061027][ T288] do_syscall_64+0x4c/0xa0 [ 22.065421][ T288] ? clear_bhb_loop+0x50/0xa0 [ 22.070078][ T288] ? clear_bhb_loop+0x50/0xa0 [ 22.074731][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 22.080606][ T288] RIP: 0033:0x7f30e8275bb9 [ 22.084998][ 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 [ 22.104583][ T288] RSP: 002b:00007ffe2469c4d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd [ 22.112979][ T288] RAX: ffffffffffffffda RBX: 0072657070752e79 RCX: 00007f30e8275bb9 [ 22.120928][ T288] RDX: 0000200000000040 RSI: 00002000000000c0 RDI: 0000200000000100 [ 22.128880][ T288] RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 22.136830][ T288] R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000001 [ 22.144776][ T288] R13: 00007ffe2469c6b8 R14: 0000000000000001 R15: 0000000000000001 [ 22.152726][ T288] [ 22.155723][ T288] [ 22.158024][ T288] Allocated by task 288: [ 22.162235][ T288] __kasan_kmalloc+0xda/0x110 [ 22.166893][ T288] __kmalloc_track_caller+0x13c/0x2c0 [ 22.172242][ T288] kmemdup+0x26/0x60 [ 22.176112][ T288] ext4_xattr_block_set+0x7e2/0x2cb0 [ 22.181374][ T288] ext4_xattr_set_handle+0xba5/0x12b0 [ 22.186724][ T288] ext4_xattr_set+0x22a/0x320 [ 22.191387][ T288] ext4_xattr_trusted_set+0x3c/0x50 [ 22.196581][ T288] __vfs_setxattr+0x3e1/0x430 [ 22.201239][ T288] __vfs_setxattr_noperm+0x12a/0x5e0 [ 22.206502][ T288] __vfs_setxattr_locked+0x212/0x230 [ 22.211761][ T288] vfs_setxattr+0x168/0x2f0 [ 22.216244][ T288] setxattr+0x2da/0x300 [ 22.220377][ T288] path_setxattr+0x142/0x280 [ 22.224942][ T288] __x64_sys_lsetxattr+0xc2/0xe0 [ 22.229855][ T288] x64_sys_call+0x8cc/0x9a0 [ 22.234334][ T288] do_syscall_64+0x4c/0xa0 [ 22.238728][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 22.244597][ T288] [ 22.246899][ T288] The buggy address belongs to the object at ffff888106384800 [ 22.246899][ T288] which belongs to the cache kmalloc-1k of size 1024 [ 22.260929][ T288] The buggy address is located 112 bytes inside of [ 22.260929][ T288] 1024-byte region [ffff888106384800, ffff888106384c00) [ 22.274267][ T288] The buggy address belongs to the page: [ 22.279879][ T288] page:ffffea000418e000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106380 [ 22.290100][ T288] head:ffffea000418e000 order:3 compound_mapcount:0 compound_pincount:0 [ 22.298397][ T288] flags: 0x4000000000010200(slab|head|zone=1) [ 22.304460][ T288] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080 [ 22.313017][ T288] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 22.321585][ T288] page dumped because: kasan: bad access detected [ 22.327970][ T288] page_owner tracks the page as allocated [ 22.333657][ 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 90, ts 21532558027, free_ts 17760441163 [ 22.352658][ T288] post_alloc_hook+0x192/0x1b0 [ 22.357406][ T288] prep_new_page+0x1c/0x110 [ 22.361886][ T288] get_page_from_freelist+0x2cc5/0x2d50 [ 22.367407][ T288] __alloc_pages+0x18f/0x440 [ 22.371970][ T288] new_slab+0xa1/0x4d0 [ 22.376020][ T288] ___slab_alloc+0x381/0x810 [ 22.380586][ T288] __slab_alloc+0x49/0x90 [ 22.384891][ T288] kmem_cache_alloc_trace+0x146/0x270 [ 22.390258][ T288] syslog_print+0xf9/0x820 [ 22.394651][ T288] do_syslog+0x6ae/0x780 [ 22.398901][ T288] __x64_sys_syslog+0x7c/0x90 [ 22.403559][ T288] x64_sys_call+0x728/0x9a0 [ 22.408039][ T288] do_syscall_64+0x4c/0xa0 [ 22.412431][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 22.418304][ T288] page last free stack trace: [ 22.422947][ T288] free_unref_page_prepare+0x542/0x550 [ 22.428383][ T288] free_unref_page+0xa2/0x550 [ 22.433035][ T288] __free_pages+0x6c/0x100 [ 22.437428][ T288] __free_slab+0xe8/0x1e0 [ 22.441736][ T288] __unfreeze_partials+0x160/0x190 [ 22.446823][ T288] put_cpu_partial+0xc6/0x120 [ 22.451476][ T288] __slab_free+0x1d4/0x290 [ 22.455871][ T288] ___cache_free+0x104/0x120 [ 22.460444][ T288] qlink_free+0x4d/0x90 [ 22.464592][ T288] qlist_free_all+0x5f/0xb0 [ 22.469079][ T288] kasan_quarantine_reduce+0x14a/0x170 [ 22.474518][ T288] __kasan_slab_alloc+0x2f/0xf0 [ 22.479361][ T288] slab_post_alloc_hook+0x4f/0x2b0 [ 22.484451][ T288] kmem_cache_alloc+0xf7/0x260 [ 22.489189][ T288] __alloc_skb+0xe0/0x740 [ 22.493494][ T288] alloc_skb_with_frags+0xa8/0x620 [ 22.498584][ T288] [ 22.500883][ T288] Memory state around the buggy address: [ 22.506486][ T288] ffff888106384700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.514521][ T288] ffff888106384780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.522575][ T288] >ffff888106384800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 lsetxattr("./file1", "trusted.overlay.upper", "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 +++ [ 22.53