./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor111256214 <...> Warning: Permanently added '10.128.1.35' (ED25519) to the list of known hosts. execve("./syz-executor111256214", ["./syz-executor111256214"], 0x7fffca711000 /* 10 vars */) = 0 brk(NULL) = 0x5555697c4000 brk(0x5555697c4d00) = 0x5555697c4d00 arch_prctl(ARCH_SET_FS, 0x5555697c4380) = 0 set_tid_address(0x5555697c4650) = 289 set_robust_list(0x5555697c4660, 24) = 0 rseq(0x5555697c4ca0, 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-executor111256214", 4096) = 27 getrandom("\x6c\x1a\xd1\x8e\x85\xbf\xd3\x37", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555697c4d00 brk(0x5555697e5d00) = 0x5555697e5d00 brk(0x5555697e6000) = 0x5555697e6000 mprotect(0x7f01cd865000, 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 executing program 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) = 0x7f01c53b5000 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(0x7f01c53b5000, 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 [ 24.173893][ T28] audit: type=1400 audit(1747705937.431:64): avc: denied { execmem } for pid=289 comm="syz-executor111" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.177553][ T289] loop0: detected capacity change from 0 to 512 [ 24.194022][ T28] audit: type=1400 audit(1747705937.441:65): avc: denied { read write } for pid=289 comm="syz-executor111" 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 [ 24.213120][ T289] EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support! [ 24.225322][ T28] audit: type=1400 audit(1747705937.441:66): avc: denied { open } for pid=289 comm="syz-executor111" 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 [ 24.237678][ T289] EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode [ 24.262794][ T28] audit: type=1400 audit(1747705937.441:67): avc: denied { ioctl } for pid=289 comm="syz-executor111" 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 [ 24.286016][ T289] EXT4-fs warning (device loop0): ext4_expand_extra_isize_ea:2809: Unable to expand inode 15. Delete some EAs or run e2fsck. mount("/dev/loop0", "./file2", "ext4", MS_NODEV|MS_NOATIME, "nogrpid,resuid=0x0000000000000000,debug_want_extra_isize=0x0000000000000068,jqfmt=vfsv0,nombcache,qu"...) = 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 [ 24.298636][ T28] audit: type=1400 audit(1747705937.471:68): avc: denied { mounton } for pid=289 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 [ 24.311755][ T289] EXT4-fs (loop0): 1 truncate cleaned up [ 24.340005][ T289] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. [ 24.349646][ T28] audit: type=1400 audit(1747705937.611:69): avc: denied { mount } for pid=289 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 [ 24.372272][ T28] audit: type=1400 audit(1747705937.631:70): avc: denied { setattr } for pid=289 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 [ 24.375858][ T289] ================================================================== [ 24.403047][ T289] BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x979/0x21d0 [ 24.410992][ T289] Read of size 18446744073709551572 at addr ffff88810d67a850 by task syz-executor111/289 [ 24.420795][ T289] [ 24.423140][ T289] CPU: 1 PID: 289 Comm: syz-executor111 Not tainted 6.1.134-syzkaller-00018-g228e0f23bdeb #0 [ 24.433288][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 24.443351][ T289] Call Trace: [ 24.446635][ T289] [ 24.449571][ T289] __dump_stack+0x21/0x24 [ 24.453915][ T289] dump_stack_lvl+0xee/0x150 [ 24.458531][ T289] ? __cfi_dump_stack_lvl+0x8/0x8 [ 24.463588][ T289] ? ext4_xattr_block_set+0x9dc/0x3270 [ 24.469081][ T289] ? __ext4_unlink+0x673/0xb00 [ 24.473885][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 24.479377][ T289] print_address_description+0x71/0x210 [ 24.485017][ T289] print_report+0x4a/0x60 [ 24.489377][ T289] kasan_report+0x122/0x150 [ 24.494021][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 24.499531][ T289] ? ext4_xattr_set_entry+0x979/0x21d0 [ 24.505110][ T289] kasan_check_range+0x280/0x290 [ 24.510068][ T289] memmove+0x2d/0x70 [ 24.514191][ T289] ext4_xattr_set_entry+0x979/0x21d0 [ 24.519629][ T289] ext4_xattr_block_set+0xada/0x3270 [ 24.524948][ T289] ? __getblk_gfp+0x3b/0x7d0 [ 24.529547][ T289] ? xattr_find_entry+0x24c/0x300 [ 24.534635][ T289] ? ext4_xattr_block_find+0x310/0x310 [ 24.540342][ T289] ? ext4_xattr_block_find+0x295/0x310 [ 24.545833][ T289] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 24.551668][ T289] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 24.557324][ T289] __ext4_mark_inode_dirty+0x3cf/0x600 [ 24.562797][ T289] __ext4_unlink+0x673/0xb00 [ 24.567419][ T289] ? memcpy+0x56/0x70 [ 24.571409][ T289] ? __cfi___ext4_unlink+0x10/0x10 [ 24.576701][ T289] ? dquot_initialize+0x20/0x20 [ 24.581667][ T289] ? clear_nonspinnable+0x60/0x60 [ 24.586742][ T289] ext4_unlink+0x13a/0x3a0 [ 24.591185][ T289] vfs_unlink+0x39f/0x630 [ 24.595527][ T289] do_unlinkat+0x31f/0x6b0 [ 24.600061][ T289] ? __cfi_do_unlinkat+0x10/0x10 [ 24.605095][ T289] ? getname_flags+0x206/0x500 [ 24.609921][ T289] __x64_sys_unlink+0x49/0x50 [ 24.614622][ T289] x64_sys_call+0x958/0x9a0 [ 24.619236][ T289] do_syscall_64+0x4c/0xa0 [ 24.623879][ T289] ? clear_bhb_loop+0x15/0x70 [ 24.628558][ T289] ? clear_bhb_loop+0x15/0x70 [ 24.633414][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.639314][ T289] RIP: 0033:0x7f01cd7f2a39 [ 24.643839][ 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 [ 24.663454][ T289] RSP: 002b:00007ffd8c53c0f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 [ 24.671993][ T289] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007f01cd7f2a39 [ 24.680062][ T289] RDX: 00007f01cd7f2a39 RSI: 00007f01cd7f2a39 RDI: 0000200000000180 [ 24.688129][ T289] RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 24.696104][ T289] R10: 0000000000000000 R11: 0000000000000246 R12: 0032656c69662f2e [ 24.704355][ T289] R13: 00007ffd8c53c2d8 R14: 0000000000000001 R15: 0000000000000001 [ 24.712525][ T289] [ 24.715852][ T289] [ 24.718293][ T289] Allocated by task 289: [ 24.722525][ T289] kasan_set_track+0x4b/0x70 [ 24.727120][ T289] kasan_save_alloc_info+0x25/0x30 [ 24.732323][ T289] __kasan_kmalloc+0x95/0xb0 [ 24.737004][ T289] __kmalloc_node_track_caller+0xb1/0x1e0 [ 24.742851][ T289] kmemdup+0x2b/0x60 [ 24.746767][ T289] ext4_xattr_block_set+0x9dc/0x3270 [ 24.752168][ T289] ext4_expand_extra_isize_ea+0xf30/0x1990 [ 24.758520][ T289] __ext4_expand_extra_isize+0x2fe/0x3e0 [ 24.764619][ T289] __ext4_mark_inode_dirty+0x3cf/0x600 [ 24.770303][ T289] __ext4_unlink+0x673/0xb00 [ 24.774912][ T289] ext4_unlink+0x13a/0x3a0 [ 24.779438][ T289] vfs_unlink+0x39f/0x630 [ 24.783890][ T289] do_unlinkat+0x31f/0x6b0 [ 24.788683][ T289] __x64_sys_unlink+0x49/0x50 [ 24.793853][ T289] x64_sys_call+0x958/0x9a0 [ 24.798661][ T289] do_syscall_64+0x4c/0xa0 [ 24.803184][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.809362][ T289] [ 24.811692][ T289] The buggy address belongs to the object at ffff88810d67a800 [ 24.811692][ T289] which belongs to the cache kmalloc-1k of size 1024 [ 24.825922][ T289] The buggy address is located 80 bytes inside of [ 24.825922][ T289] 1024-byte region [ffff88810d67a800, ffff88810d67ac00) [ 24.839607][ T289] [ 24.841951][ T289] The buggy address belongs to the physical page: [ 24.848376][ T289] page:ffffea0004359e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d678 [ 24.858638][ T289] head:ffffea0004359e00 order:3 compound_mapcount:0 compound_pincount:0 [ 24.866985][ T289] flags: 0x4000000000010200(slab|head|zone=1) [ 24.873087][ T289] raw: 4000000000010200 ffffea00042dde00 dead000000000002 ffff888100043080 [ 24.881943][ T289] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 24.891043][ T289] page dumped because: kasan: bad access detected [ 24.897651][ T289] page_owner tracks the page as allocated [ 24.903544][ 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 1, tgid 1 (swapper/0), ts 2737425704, free_ts 0 [ 24.923964][ T289] post_alloc_hook+0x1f5/0x210 [ 24.928859][ T289] prep_new_page+0x1c/0x110 [ 24.933640][ T289] get_page_from_freelist+0x2c6e/0x2ce0 [ 24.939651][ T289] __alloc_pages+0x19e/0x3a0 [ 24.944350][ T289] alloc_slab_page+0x6e/0xf0 [ 24.949155][ T289] new_slab+0x98/0x3d0 [ 24.953500][ T289] ___slab_alloc+0x6f6/0xb50 [ 24.958264][ T289] __slab_alloc+0x5e/0xa0 [ 24.962794][ T289] __kmem_cache_alloc_node+0x203/0x2c0 [ 24.968342][ T289] __kmalloc+0xa1/0x1e0 [ 24.972939][ T289] blk_stat_alloc_callback+0x91/0x210 [ 24.978326][ T289] blk_mq_init_allocated_queue+0x173/0x16b0 [ 24.984315][ T289] blk_mq_init_queue+0xa6/0x120 [ 24.989260][ T289] scsi_alloc_sdev+0x6a0/0xac0 [ 24.994043][ T289] scsi_probe_and_add_lun+0x192/0x3bb0 [ 24.999617][ T289] __scsi_scan_target+0x1e8/0xbb0 [ 25.004750][ T289] page_owner free stack trace missing [ 25.010154][ T289] [ 25.012758][ T289] Memory state around the buggy address: [ 25.018545][ T289] ffff88810d67a700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.026737][ T289] ffff88810d67a780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.034830][ T289] >ffff88810d67a800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.042981][ T289] ^ [ 25.049738][ T289] ffff88810d67a880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.057981][ T289] ffff88810d67a900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.066127][ T289] ================================================================== [ 25.074567][ T289] Disabling lock debugging due to kernel taint [ 25.081267][ T28] audit: type=1400 audit(1747705937.631:71): avc: denied { write } for pid=289 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 [ 25.081295][ T28] audit: type=1400 audit(1747705937.631:72): avc: denied { add_name } for pid=289 comm="syz-executor111" name="file2" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 unlink("./file1") = 0 exit_group(0) = ? +++ exited with 0 +++ [ 25.081320][ T28]