EXT4-fs error (device loop3): xattr_find_entry:297: inode #12: comm syz-executor: corrupted xattr entries
EXT4-fs error (device loop3): xattr_find_entry:297: inode #12: comm syz-executor: corrupted xattr entries
==================================================================
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+0x448/0xdb0 fs/ext4/inline.c:1533
Read of size 68 at addr ffff8881197f06d3 by task syz-executor/489

CPU: 1 PID: 489 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 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+0x249/0x2a0 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+0x448/0xdb0 fs/ext4/inline.c:1533
 ext4_readdir+0x39b/0x3ab0 fs/ext4/dir.c:161
 iterate_dir+0x260/0x570 fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0xf2/0x250 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: 0033:0x7fd168d84ab3
Code: c7 c0 e8 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb 9e e8 81 9b fd ff 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 e8 ff ff ff f7 d8
RSP: 002b:00007ffe549d6078 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000055558b9b9950 RCX: 00007fd168d84ab3
RDX: 0000000000008000 RSI: 000055558b9b9980 RDI: 0000000000000006
RBP: 000055558b9b9980 R08: 00007fd168f61ca0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 000055558b9b9954
R13: ffffffffffffffe8 R14: 0000000000000016 R15: 00007ffe549d9410

Allocated by task 423:
 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+0x162/0x2d0 mm/slub.c:2965
 getname_flags+0xb9/0x500 fs/namei.c:141
 user_path_at_empty+0x2f/0x50 fs/namei.c:2748
 user_path_at include/linux/namei.h:60 [inline]
 vfs_statx+0x10a/0x530 fs/stat.c:193
 vfs_fstatat fs/stat.c:215 [inline]
 __do_sys_newfstatat fs/stat.c:383 [inline]
 __se_sys_newfstatat+0x10e/0x3d0 fs/stat.c:377
 __x64_sys_newfstatat+0x9b/0xb0 fs/stat.c:377
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 423:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kmem_cache_free+0x100/0x2d0 mm/slub.c:3224
 putname fs/namei.c:262 [inline]
 filename_lookup+0x4b3/0x6a0 fs/namei.c:2478
 user_path_at_empty+0x43/0x50 fs/namei.c:2748
 user_path_at include/linux/namei.h:60 [inline]
 vfs_statx+0x10a/0x530 fs/stat.c:193
 vfs_fstatat fs/stat.c:215 [inline]
 __do_sys_newfstatat fs/stat.c:383 [inline]
 __se_sys_newfstatat+0x10e/0x3d0 fs/stat.c:377
 __x64_sys_newfstatat+0x9b/0xb0 fs/stat.c:377
 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 ffff8881197f0000
 which belongs to the cache names_cache of size 4096
The buggy address is located 1747 bytes inside of
 4096-byte region [ffff8881197f0000, ffff8881197f1000)
The buggy address belongs to the page:
page:ffffea000465fc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1197f0
head:ffffea000465fc00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 0000000000000000 0000000100000001 ffff88810018be00
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 106, ts 5036099901, 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+0x223b/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x290/0x620 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+0x1ac/0x2d0 mm/slub.c:2965
 getname_flags+0xb9/0x500 fs/namei.c:141
 getname+0x19/0x20 fs/namei.c:212
 do_sys_openat2+0xde/0x750 fs/open.c:1213
 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:
 ffff8881197f0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881197f0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881197f0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881197f0700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881197f0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
EXT4-fs error (device loop3): ext4_read_inline_dir:1614: 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 loop3): ext4_read_inline_dir:1614: 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 loop3): empty_inline_dir:1868: 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 loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs error (device loop3): ext4_read_inline_dir:1614: 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 loop3): ext4_read_inline_dir:1614: 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 loop3): empty_inline_dir:1868: 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 loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs error (device loop3): ext4_read_inline_dir:1614: 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 loop3): ext4_read_inline_dir:1614: 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 loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60
EXT4-fs warning (device loop3): empty_inline_dir:1875: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60