./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3804641451 <...> Warning: Permanently added '10.128.1.154' (ED25519) to the list of known hosts. execve("./syz-executor3804641451", ["./syz-executor3804641451"], 0x7ffe367e7f70 /* 10 vars */) = 0 brk(NULL) = 0x5555742f2000 brk(0x5555742f2d00) = 0x5555742f2d00 arch_prctl(ARCH_SET_FS, 0x5555742f2380) = 0 set_tid_address(0x5555742f2650) = 289 set_robust_list(0x5555742f2660, 24) = 0 rseq(0x5555742f2ca0, 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-executor3804641451", 4096) = 28 getrandom("\x02\x56\x45\x56\x0c\x45\x22\x82", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555742f2d00 brk(0x555574313d00) = 0x555574313d00 brk(0x555574314000) = 0x555574314000 mprotect(0x7fdfd757e000, 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) = 0x7fdfcf0ce000 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(0x7fdfcf0ce000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 26.901029][ T28] audit: type=1400 audit(1752834695.781:64): avc: denied { execmem } for pid=289 comm="syz-executor380" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 26.905298][ T289] loop0: detected capacity change from 0 to 512 [ 26.921015][ T28] audit: type=1400 audit(1752834695.781:65): avc: denied { read write } for pid=289 comm="syz-executor380" 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 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file2", 0777) = 0 [ 26.928794][ T289] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 26.958425][ T28] audit: type=1400 audit(1752834695.781:66): avc: denied { open } for pid=289 comm="syz-executor380" 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 [ 26.974206][ T289] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 26.988981][ T28] audit: type=1400 audit(1752834695.781:67): avc: denied { ioctl } for pid=289 comm="syz-executor380" 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 [ 27.005870][ T289] 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", "\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 creat("./file2", 0655) = 4 [ 27.023377][ T28] audit: type=1400 audit(1752834695.811:68): avc: denied { mounton } for pid=289 comm="syz-executor380" path="/root/file2" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 27.036442][ T289] EXT4-fs (loop0): 1 truncate cleaned up [ 27.065145][ T289] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. [ 27.074185][ T28] audit: type=1400 audit(1752834695.951:69): avc: denied { mount } for pid=289 comm="syz-executor380" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 27.096265][ T28] audit: type=1400 audit(1752834695.971:70): avc: denied { setattr } for pid=289 comm="syz-executor380" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 27.096568][ T289] ================================================================== [ 27.119155][ T28] audit: type=1400 audit(1752834695.971:71): avc: denied { write } for pid=289 comm="syz-executor380" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 27.126820][ T289] BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 [ 27.148799][ T28] audit: type=1400 audit(1752834695.971:72): avc: denied { add_name } for pid=289 comm="syz-executor380" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 27.156404][ T289] Read of size 18446744073709551572 at addr ffff88810c615050 by task syz-executor380/289 [ 27.156426][ T289] [ 27.156433][ T289] CPU: 0 PID: 289 Comm: syz-executor380 Not tainted 6.1.141-syzkaller-00039-g145c7fad733f #0 [ 27.177638][ T28] audit: type=1400 audit(1752834695.971:73): avc: denied { create } for pid=289 comm="syz-executor380" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 27.187048][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 27.187074][ T289] Call Trace: [ 27.233192][ T289] [ 27.236110][ T289] __dump_stack+0x21/0x24 [ 27.240434][ T289] dump_stack_lvl+0xee/0x150 [ 27.245011][ T289] ? __cfi_dump_stack_lvl+0x8/0x8 [ 27.250024][ T289] ? ext4_xattr_block_set+0x9dc/0x3270 [ 27.255482][ T289] ? __ext4_unlink+0x673/0xb00 [ 27.260238][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 27.265681][ T289] print_address_description+0x71/0x210 [ 27.271218][ T289] print_report+0x4a/0x60 [ 27.275537][ T289] kasan_report+0x122/0x150 [ 27.280031][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 27.285483][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 27.290935][ T289] kasan_check_range+0x280/0x290 [ 27.295857][ T289] memmove+0x2d/0x70 [ 27.299741][ T289] ext4_xattr_set_entry+0x979/0x21d0 [ 27.305016][ T289] ext4_xattr_block_set+0xada/0x3270 [ 27.310291][ T289] ? __getblk_gfp+0x3b/0x7d0 [ 27.314865][ T289] ? xattr_find_entry+0x24c/0x300 [ 27.319873][ T289] ? ext4_xattr_block_find+0x310/0x310 [ 27.325321][ T289] ? ext4_xattr_block_find+0x295/0x310 [ 27.330763][ T289] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 27.336562][ T289] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 27.342186][ T289] __ext4_mark_inode_dirty+0x3cf/0x600 [ 27.347631][ T289] __ext4_unlink+0x673/0xb00 [ 27.352205][ T289] ? memcpy+0x56/0x70 [ 27.356196][ T289] ? __cfi___ext4_unlink+0x10/0x10 [ 27.361297][ T289] ? dquot_initialize+0x20/0x20 [ 27.366145][ T289] ? clear_nonspinnable+0x60/0x60 [ 27.371181][ T289] ext4_unlink+0x13a/0x3a0 [ 27.375590][ T289] vfs_unlink+0x39f/0x630 [ 27.379911][ T289] do_unlinkat+0x31f/0x6b0 [ 27.384318][ T289] ? __cfi_do_unlinkat+0x10/0x10 [ 27.389241][ T289] ? getname_flags+0x206/0x500 [ 27.393996][ T289] __x64_sys_unlink+0x49/0x50 [ 27.398655][ T289] x64_sys_call+0x958/0x9a0 [ 27.403143][ T289] do_syscall_64+0x4c/0xa0 [ 27.407542][ T289] ? clear_bhb_loop+0x30/0x80 [ 27.412205][ T289] ? clear_bhb_loop+0x30/0x80 [ 27.416874][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 27.422754][ T289] RIP: 0033:0x7fdfd750baf9 [ 27.427163][ T289] 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 [ 27.446760][ T289] RSP: 002b:00007ffe28d6d648 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 27.455165][ T289] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007fdfd750baf9 [ 27.463119][ T289] RDX: 00007fdfd750baf9 RSI: 00007fdfd750baf9 RDI: 0000200000000180 [ 27.471070][ T289] RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 27.479042][ T289] R10: 0000000000000000 R11: 0000000000000246 R12: 0032656c69662f2e [ 27.487000][ T289] R13: 00007ffe28d6d828 R14: 0000000000000001 R15: 0000000000000001 [ 27.494965][ T289] [ 27.497971][ T289] [ 27.500280][ T289] Allocated by task 289: [ 27.504498][ T289] kasan_set_track+0x4b/0x70 [ 27.509075][ T289] kasan_save_alloc_info+0x25/0x30 [ 27.514201][ T289] __kasan_kmalloc+0x95/0xb0 [ 27.518771][ T289] __kmalloc_node_track_caller+0xb1/0x1e0 [ 27.524475][ T289] kmemdup+0x2b/0x60 [ 27.528352][ T289] ext4_xattr_block_set+0x9dc/0x3270 [ 27.533635][ T289] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 27.539430][ T289] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 27.545047][ T289] __ext4_mark_inode_dirty+0x3cf/0x600 [ 27.550483][ T289] __ext4_unlink+0x673/0xb00 [ 27.555052][ T289] ext4_unlink+0x13a/0x3a0 [ 27.559452][ T289] vfs_unlink+0x39f/0x630 [ 27.563767][ T289] do_unlinkat+0x31f/0x6b0 [ 27.568164][ T289] __x64_sys_unlink+0x49/0x50 [ 27.572824][ T289] x64_sys_call+0x958/0x9a0 [ 27.577310][ T289] do_syscall_64+0x4c/0xa0 [ 27.581709][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 27.587584][ T289] [ 27.589889][ T289] The buggy address belongs to the object at ffff88810c615000 [ 27.589889][ T289] which belongs to the cache kmalloc-1k of size 1024 [ 27.603918][ T289] The buggy address is located 80 bytes inside of [ 27.603918][ T289] 1024-byte region [ffff88810c615000, ffff88810c615400) [ 27.617192][ T289] [ 27.619501][ T289] The buggy address belongs to the physical page: [ 27.625888][ T289] page:ffffea0004318400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c610 [ 27.636106][ T289] head:ffffea0004318400 order:3 compound_mapcount:0 compound_pincount:0 [ 27.644409][ T289] flags: 0x4000000000010200(slab|head|zone=1) [ 27.650463][ T289] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043080 [ 27.659024][ T289] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 27.667583][ T289] page dumped because: kasan: bad access detected [ 27.673970][ T289] page_owner tracks the page as allocated [ 27.679662][ T289] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 91, tgid 91 (klogd), ts 26997963264, free_ts 26834743877 [ 27.700044][ T289] post_alloc_hook+0x1f5/0x210 [ 27.704799][ T289] prep_new_page+0x1c/0x110 [ 27.709288][ T289] get_page_from_freelist+0x2c7b/0x2cf0 [ 27.714824][ T289] __alloc_pages+0x19e/0x3a0 [ 27.719395][ T289] alloc_slab_page+0x6e/0xf0 [ 27.723968][ T289] new_slab+0x98/0x3d0 [ 27.728021][ T289] ___slab_alloc+0x6f6/0xb50 [ 27.732593][ T289] __slab_alloc+0x5e/0xa0 [ 27.736927][ T289] __kmem_cache_alloc_node+0x203/0x2c0 [ 27.742373][ T289] __kmalloc_node_track_caller+0xa0/0x1e0 [ 27.748079][ T289] __alloc_skb+0x236/0x4b0 [ 27.752481][ T289] alloc_skb_with_frags+0xa8/0x620 [ 27.757575][ T289] sock_alloc_send_pskb+0x853/0x980 [ 27.762762][ T289] unix_dgram_sendmsg+0x592/0x16d0 [ 27.767854][ T289] __sys_sendto+0x464/0x5e0 [ 27.772338][ T289] __x64_sys_sendto+0xe5/0x100 [ 27.777080][ T289] page last free stack trace: [ 27.781733][ T289] free_unref_page_prepare+0x742/0x750 [ 27.787174][ T289] free_unref_page+0x8f/0x530 [ 27.791837][ T289] __free_pages+0x67/0x100 [ 27.796238][ T289] __free_slab+0xca/0x1a0 [ 27.800556][ T289] __unfreeze_partials+0x160/0x190 [ 27.805656][ T289] put_cpu_partial+0xa9/0x100 [ 27.810336][ T289] __slab_free+0x1c4/0x280 [ 27.814740][ T289] ___cache_free+0xbf/0xd0 [ 27.819140][ T289] qlist_free_all+0xc6/0x140 [ 27.823716][ T289] kasan_quarantine_reduce+0x14a/0x170 [ 27.829162][ T289] __kasan_slab_alloc+0x24/0x80 [ 27.833999][ T289] slab_post_alloc_hook+0x4f/0x2d0 [ 27.839111][ T289] __kmem_cache_alloc_node+0x192/0x2c0 [ 27.844552][ T289] __kmalloc_node_track_caller+0xa0/0x1e0 [ 27.850271][ T289] kmemdup_nul+0x31/0xa0 [ 27.854514][ T289] security_context_to_sid_core+0xc6/0x560 [ 27.860311][ T289] [ 27.862616][ T289] Memory state around the buggy address: [ 27.868225][ T289] ffff88810c614f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.876270][ T289] ffff88810c614f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.884312][ T289] >ffff88810c615000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.892353][ T289] ^ unlink("./file1") = 0 exit_group(0) = ? +++ exited with 0 +++ [ 27.899006][ T289] ffff88810c615080: 00 00 00 00 00 00 00 00 00 00 00