./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1786169372 <...> Warning: Permanently added '10.128.0.219' (ED25519) to the list of known hosts. execve("./syz-executor1786169372", ["./syz-executor1786169372"], 0x7ffcb7dcbad0 /* 10 vars */) = 0 brk(NULL) = 0x55557b93f000 brk(0x55557b93fd00) = 0x55557b93fd00 arch_prctl(ARCH_SET_FS, 0x55557b93f380) = 0 set_tid_address(0x55557b93f650) = 290 set_robust_list(0x55557b93f660, 24) = 0 rseq(0x55557b93fca0, 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-executor1786169372", 4096) = 28 getrandom("\x7e\x44\x06\xa7\x5f\x44\x1d\x61", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557b93fd00 brk(0x55557b960d00) = 0x55557b960d00 brk(0x55557b961000) = 0x55557b961000 mprotect(0x7fbcaef33000, 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, 0executing program ) = 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) = 0x7fbca6a83000 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(0x7fbca6a83000, 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 [ 24.677817][ T28] audit: type=1400 audit(1752246982.791:64): avc: denied { execmem } for pid=290 comm="syz-executor178" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.682503][ T290] loop0: detected capacity change from 0 to 512 [ 24.697961][ T28] audit: type=1400 audit(1752246982.791:65): avc: denied { read write } for pid=290 comm="syz-executor178" 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 [ 24.715587][ T290] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 24.731929][ T28] audit: type=1400 audit(1752246982.791:66): avc: denied { open } for pid=290 comm="syz-executor178" 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 [ 24.741480][ T290] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 24.766017][ T28] audit: type=1400 audit(1752246982.791:67): avc: denied { ioctl } for pid=290 comm="syz-executor178" 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 [ 24.794400][ T290] EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2818: Unable to expand inode 15. Delete some EAs or run e2fsck. mount("/dev/loop0", "./file2", "ext4", MS_NODEV|MS_NOATIME, "mb_optimize_scan=0x0000000000000000,resuid=0x0000000000000000,debug_want_extra_isize=0x0000000000000"...) = 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", "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 creat("./file2", 0655) = 4 [ 24.801620][ T28] audit: type=1400 audit(1752246982.821:68): avc: denied { mounton } for pid=290 comm="syz-executor178" path="/root/file2" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.814927][ T290] EXT4-fs (loop0): 1 truncate cleaned up [ 24.842946][ T290] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. [ 24.852622][ T28] audit: type=1400 audit(1752246982.961:69): avc: denied { mount } for pid=290 comm="syz-executor178" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 24.871309][ T290] ================================================================== [ 24.875387][ T28] audit: type=1400 audit(1752246982.981:70): avc: denied { setattr } for pid=290 comm="syz-executor178" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 24.882504][ T290] BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 [ 24.905239][ T28] audit: type=1400 audit(1752246982.981:71): avc: denied { write } for pid=290 comm="syz-executor178" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.912681][ T290] Read of size 18446744073709551572 at addr ffff888107829850 by task syz-executor178/290 [ 24.934708][ T28] audit: type=1400 audit(1752246982.981:72): avc: denied { add_name } for pid=290 comm="syz-executor178" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.944255][ T290] [ 24.944262][ T290] CPU: 1 PID: 290 Comm: syz-executor178 Not tainted 6.1.141-syzkaller-00038-ge2deb0b42a3a #0 [ 24.944283][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 24.965573][ T28] audit: type=1400 audit(1752246982.981:73): avc: denied { create } for pid=290 comm="syz-executor178" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 24.967623][ T290] Call Trace: [ 25.011465][ T290] [ 25.014395][ T290] __dump_stack+0x21/0x24 [ 25.018737][ T290] dump_stack_lvl+0xee/0x150 [ 25.023326][ T290] ? __cfi_dump_stack_lvl+0x8/0x8 [ 25.028356][ T290] ? ext4_xattr_block_set+0x9dc/0x3270 [ 25.033842][ T290] ? __ext4_unlink+0x673/0xb00 [ 25.038663][ T290] ? ext4_xattr_set_entry+0x979/0x21d0 [ 25.044233][ T290] print_address_description+0x71/0x210 [ 25.049789][ T290] print_report+0x4a/0x60 [ 25.054125][ T290] kasan_report+0x122/0x150 [ 25.058639][ T290] ? ext4_xattr_set_entry+0x979/0x21d0 [ 25.064106][ T290] ? ext4_xattr_set_entry+0x979/0x21d0 [ 25.069570][ T290] kasan_check_range+0x280/0x290 [ 25.074608][ T290] memmove+0x2d/0x70 [ 25.078512][ T290] ext4_xattr_set_entry+0x979/0x21d0 [ 25.083912][ T290] ext4_xattr_block_set+0xada/0x3270 [ 25.089292][ T290] ? __getblk_gfp+0x3b/0x7d0 [ 25.093886][ T290] ? xattr_find_entry+0x24c/0x300 [ 25.098916][ T290] ? ext4_xattr_block_find+0x310/0x310 [ 25.104380][ T290] ? ext4_xattr_block_find+0x295/0x310 [ 25.109848][ T290] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 25.115855][ T290] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 25.121494][ T290] __ext4_mark_inode_dirty+0x3cf/0x600 [ 25.126954][ T290] __ext4_unlink+0x673/0xb00 [ 25.131571][ T290] ? memcpy+0x56/0x70 [ 25.135576][ T290] ? __cfi___ext4_unlink+0x10/0x10 [ 25.140709][ T290] ? dquot_initialize+0x20/0x20 [ 25.145572][ T290] ? clear_nonspinnable+0x60/0x60 [ 25.150750][ T290] ext4_unlink+0x13a/0x3a0 [ 25.155182][ T290] vfs_unlink+0x39f/0x630 [ 25.159528][ T290] do_unlinkat+0x31f/0x6b0 [ 25.163953][ T290] ? __cfi_do_unlinkat+0x10/0x10 [ 25.168894][ T290] ? getname_flags+0x206/0x500 [ 25.173675][ T290] __x64_sys_unlink+0x49/0x50 [ 25.178359][ T290] x64_sys_call+0x958/0x9a0 [ 25.182868][ T290] do_syscall_64+0x4c/0xa0 [ 25.187286][ T290] ? clear_bhb_loop+0x30/0x80 [ 25.191964][ T290] ? clear_bhb_loop+0x30/0x80 [ 25.196646][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 25.202553][ T290] RIP: 0033:0x7fbcaeec0a79 [ 25.206983][ T290] 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 [ 25.226589][ T290] RSP: 002b:00007fff2e443718 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 25.235018][ T290] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007fbcaeec0a79 [ 25.242994][ T290] RDX: 00007fbcaeec0a79 RSI: 00007fbcaeec0a79 RDI: 0000200000000180 [ 25.250963][ T290] RBP: 0032656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 25.258936][ T290] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 25.266903][ T290] R13: 00007fff2e4438f8 R14: 0000000000000001 R15: 0000000000000001 [ 25.274878][ T290] [ 25.277901][ T290] [ 25.280228][ T290] Allocated by task 290: [ 25.284465][ T290] kasan_set_track+0x4b/0x70 [ 25.289059][ T290] kasan_save_alloc_info+0x25/0x30 [ 25.294220][ T290] __kasan_kmalloc+0x95/0xb0 [ 25.298825][ T290] __kmalloc_node_track_caller+0xb1/0x1e0 [ 25.304551][ T290] kmemdup+0x2b/0x60 [ 25.308453][ T290] ext4_xattr_block_set+0x9dc/0x3270 [ 25.313742][ T290] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 25.319556][ T290] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 25.325284][ T290] __ext4_mark_inode_dirty+0x3cf/0x600 [ 25.330757][ T290] __ext4_unlink+0x673/0xb00 [ 25.335383][ T290] ext4_unlink+0x13a/0x3a0 [ 25.339820][ T290] vfs_unlink+0x39f/0x630 [ 25.344156][ T290] do_unlinkat+0x31f/0x6b0 [ 25.348578][ T290] __x64_sys_unlink+0x49/0x50 [ 25.353280][ T290] x64_sys_call+0x958/0x9a0 [ 25.357789][ T290] do_syscall_64+0x4c/0xa0 [ 25.362204][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 25.368104][ T290] [ 25.370428][ T290] The buggy address belongs to the object at ffff888107829800 [ 25.370428][ T290] which belongs to the cache kmalloc-1k of size 1024 [ 25.384477][ T290] The buggy address is located 80 bytes inside of [ 25.384477][ T290] 1024-byte region [ffff888107829800, ffff888107829c00) [ 25.397754][ T290] [ 25.400081][ T290] The buggy address belongs to the physical page: [ 25.406490][ T290] page:ffffea00041e0a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107828 [ 25.416743][ T290] head:ffffea00041e0a00 order:3 compound_mapcount:0 compound_pincount:0 [ 25.425152][ T290] flags: 0x4000000000010200(slab|head|zone=1) [ 25.431245][ T290] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 25.439829][ T290] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 25.448408][ T290] page dumped because: kasan: bad access detected [ 25.454815][ T290] page_owner tracks the page as allocated [ 25.460525][ T290] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 4036728947, free_ts 3931453891 [ 25.481026][ T290] post_alloc_hook+0x1f5/0x210 [ 25.485807][ T290] prep_new_page+0x1c/0x110 [ 25.490316][ T290] get_page_from_freelist+0x2c7b/0x2cf0 [ 25.495866][ T290] __alloc_pages+0x19e/0x3a0 [ 25.500468][ T290] alloc_slab_page+0x6e/0xf0 [ 25.505071][ T290] new_slab+0x98/0x3d0 [ 25.509142][ T290] ___slab_alloc+0x6f6/0xb50 [ 25.513733][ T290] __slab_alloc+0x5e/0xa0 [ 25.518067][ T290] __kmem_cache_alloc_node+0x203/0x2c0 [ 25.523528][ T290] __kmalloc_node_track_caller+0xa0/0x1e0 [ 25.529261][ T290] __alloc_skb+0x236/0x4b0 [ 25.533690][ T290] alloc_uevent_skb+0x85/0x240 [ 25.538470][ T290] kobject_uevent_net_broadcast+0x1b4/0x5b0 [ 25.544380][ T290] kobject_uevent_env+0x54f/0x730 [ 25.549445][ T290] kobject_uevent+0x1d/0x30 [ 25.553968][ T290] net_rx_queue_update_kobjects+0x249/0x4d0 [ 25.559874][ T290] page last free stack trace: [ 25.564547][ T290] __free_pages_ok+0xb02/0xc10 [ 25.569328][ T290] __free_pages+0xec/0x100 [ 25.573779][ T290] free_large_kmalloc+0xae/0xf0 [ 25.578648][ T290] kfree+0x8b/0xf0 [ 25.582388][ T290] kvfree+0x35/0x40 [ 25.586319][ T290] btf_check_all_metas+0x615/0xaa0 [ 25.591441][ T290] btf_parse_vmlinux+0x437/0x940 [ 25.596395][ T290] bpf_get_btf_vmlinux+0x41/0x60 [ 25.601429][ T290] btf_get_module_btf+0x85/0x200 [ 25.606386][ T290] register_btf_kfunc_id_set+0x44/0x600 [ 25.611937][ T290] register_nf_conntrack_bpf+0x1b/0xb0 [ 25.617410][ T290] nf_conntrack_init_start+0x3cc/0x460 [ 25.622876][ T290] nf_conntrack_standalone_init+0x11/0x100 [ 25.628688][ T290] do_one_initcall+0x198/0x530 [ 25.633546][ T290] do_initcall_level+0x16f/0x2d0 [ 25.638483][ T290] do_initcalls+0x50/0x92 [ 25.642816][ T290] [ 25.645139][ T290] Memory state around the buggy address: [ 25.650779][ T290] ffff888107829700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.658839][ T290] ffff888107829780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.666898][ T290] >ffff888107829800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.674956][ T290] ^ unlink("./file1") = 0 exit_group(0) = ? +++ exited with 0 +++ [ 25.6816