EXT4-fs error (device loop2): ext4_xattr_ibody_find:2220: inode #12: comm syz-executor: corrupted in-inode xattr ================================================================== BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:209 [inline] BUG: KASAN: use-after-free in ext4_read_inline_dir+0x435/0xd90 fs/ext4/inline.c:1523 Read of size 68 at addr ffff8881176976d3 by task syz-executor/471 CPU: 1 PID: 471 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0xe2/0x130 mm/kasan/report.c:452 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x280/0x290 mm/kasan/generic.c:189 memcpy+0x2d/0x70 mm/kasan/shadow.c:65 ext4_read_inline_data fs/ext4/inline.c:209 [inline] ext4_read_inline_dir+0x435/0xd90 fs/ext4/inline.c:1523 ext4_readdir+0x380/0x39b0 fs/ext4/dir.c:161 iterate_dir+0x260/0x570 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0xe5/0x240 fs/readdir.c:354 __x64_sys_getdents64+0x7b/0x90 fs/readdir.c:354 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0264880313 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 62 3e f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 RSP: 002b:00007fff3b860ce8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 000055557d361520 RCX: 00007f0264880313 RDX: 0000000000008000 RSI: 000055557d361520 RDI: 0000000000000006 RBP: 000055557d3614f4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 000055557d3614f0 R15: 00007fff3b864090 Allocated by task 101: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580 slab_alloc_node mm/slub.c:2952 [inline] slab_alloc mm/slub.c:2960 [inline] kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2965 kmem_cache_zalloc include/linux/slab.h:657 [inline] __alloc_file+0x28/0x320 fs/file_table.c:101 alloc_empty_file+0x97/0x180 fs/file_table.c:151 path_openat+0xf2/0x3160 fs/namei.c:3503 do_filp_open+0x1b3/0x3e0 fs/namei.c:3544 do_sys_openat2+0x14c/0x6d0 fs/open.c:1219 do_sys_open fs/open.c:1235 [inline] __do_sys_openat fs/open.c:1251 [inline] __se_sys_openat fs/open.c:1246 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1246 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2980 [inline] call_rcu+0x10e/0x1050 kernel/rcu/tree.c:3054 file_free fs/file_table.c:58 [inline] __fput+0x5ad/0x770 fs/file_table.c:299 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x127/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb Second to last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack+0xe/0x10 mm/kasan/generic.c:353 task_work_add+0x27/0x1e0 kernel/task_work.c:38 fput_many+0xe7/0x1a0 fs/file_table.c:342 fput+0x1a/0x20 fs/file_table.c:358 filp_close+0x105/0x150 fs/open.c:1335 __close_fd+0x35/0x50 fs/file.c:702 __do_sys_close fs/open.c:1348 [inline] __se_sys_close fs/open.c:1346 [inline] __x64_sys_close+0x66/0xb0 fs/open.c:1346 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888117697680 which belongs to the cache filp of size 296 The buggy address is located 83 bytes inside of 296-byte region [ffff888117697680, ffff8881176977a8) The buggy address belongs to the page: page:ffffea00045da580 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888117697e00 pfn:0x117696 head:ffffea00045da580 order:1 compound_mapcount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 ffffea00045deb88 ffffea00045dea08 ffff88810018b500 raw: ffff888117697e00 0000000000150001 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 101, ts 5301352984, free_ts 0 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x179/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5370 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1813 [inline] new_slab+0x84/0x3f0 mm/slub.c:1874 new_slab_objects mm/slub.c:2632 [inline] ___slab_alloc+0x2a6/0x450 mm/slub.c:2796 __slab_alloc+0x63/0xa0 mm/slub.c:2836 slab_alloc_node mm/slub.c:2918 [inline] slab_alloc mm/slub.c:2960 [inline] kmem_cache_alloc+0x1af/0x2e0 mm/slub.c:2965 kmem_cache_zalloc include/linux/slab.h:657 [inline] __alloc_file+0x28/0x320 fs/file_table.c:101 alloc_empty_file+0x97/0x180 fs/file_table.c:151 path_openat+0xf2/0x3160 fs/namei.c:3503 do_filp_open+0x1b3/0x3e0 fs/namei.c:3544 do_sys_openat2+0x14c/0x6d0 fs/open.c:1219 do_sys_open fs/open.c:1235 [inline] __do_sys_openat fs/open.c:1251 [inline] __se_sys_openat fs/open.c:1246 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1246 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb page_owner free stack trace missing Memory state around the buggy address: ffff888117697580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888117697600: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc >ffff888117697680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888117697700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888117697780: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ================================================================== EXT4-fs error (device loop2): ext4_read_inline_dir:1604: inode #12: block 7: comm syz-executor: path /0/file1/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=2239623941, rec_len=29527, size=148 fake=0 EXT4-fs error (device loop2): ext4_read_inline_dir:1604: inode #12: block 7: comm syz-executor: path /0/file1/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=2239623941, rec_len=29527, size=148 fake=0 EXT4-fs error (device loop2): empty_inline_dir:1858: inode #12: block 7: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=2239623941, rec_len=29527, size=60 fake=0 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs error (device loop2): ext4_read_inline_dir:1604: inode #12: block 7: comm syz-executor: path /0/file1/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=2239623941, rec_len=29527, size=148 fake=0 EXT4-fs error (device loop2): ext4_read_inline_dir:1604: inode #12: block 7: comm syz-executor: path /0/file1/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=2239623941, rec_len=29527, size=148 fake=0 EXT4-fs error (device loop2): empty_inline_dir:1858: inode #12: block 7: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=2239623941, rec_len=29527, size=60 fake=0 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs error (device loop2): ext4_read_inline_dir:1604: inode #12: block 7: comm syz-executor: path /0/file1/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=2239623941, rec_len=29527, size=148 fake=0 EXT4-fs error (device loop2): ext4_read_inline_dir:1604: inode #12: block 7: comm syz-executor: path /0/file1/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=2239623941, rec_len=29527, size=148 fake=0 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1865: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60