EXT4-fs error (device loop5): ext4_xattr_ibody_find:2229: inode #12: comm syz-executor: corrupted in-inode xattr EXT4-fs error (device loop5): ext4_xattr_ibody_find:2229: inode #12: comm syz-executor: corrupted in-inode xattr ================================================================== BUG: KASAN: use-after-free in ext4_read_inline_data fs/ext4/inline.c:210 [inline] BUG: KASAN: use-after-free in ext4_read_inline_dir+0x435/0xd90 fs/ext4/inline.c:1541 Read of size 68 at addr ffff8881281266d3 by task syz-executor/369 CPU: 1 PID: 369 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+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 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:210 [inline] ext4_read_inline_dir+0x435/0xd90 fs/ext4/inline.c:1541 ext4_readdir+0x383/0x3a40 fs/ext4/dir.c:161 iterate_dir+0x260/0x600 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 x64_sys_call+0x592/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:218 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f0e59f170b3 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 62 3d 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:00007fffccb54148 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555559491520 RCX: 00007f0e59f170b3 RDX: 0000000000008000 RSI: 0000555559491520 RDI: 0000000000000006 RBP: 00005555594914f4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 00005555594914f0 R15: 00007fffccb574f0 The buggy address belongs to the page: page:ffffea0004a04980 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x128126 flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0004a049c8 ffffea0004a037c8 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x100cca(GFP_HIGHUSER_MOVABLE), pid 305, ts 39334128904, free_ts 39334615796 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5808 __alloc_pages_node include/linux/gfp.h:595 [inline] alloc_pages_node include/linux/gfp.h:609 [inline] alloc_pages include/linux/gfp.h:622 [inline] shmem_alloc_page mm/shmem.c:1591 [inline] shmem_alloc_and_acct_page+0x42b/0x870 mm/shmem.c:1616 shmem_getpage_gfp+0xfe5/0x2310 mm/shmem.c:1912 shmem_getpage mm/shmem.c:156 [inline] shmem_write_begin+0xce/0x1b0 mm/shmem.c:2480 generic_perform_write+0x2ad/0x670 mm/filemap.c:3870 __generic_file_write_iter+0x268/0x480 mm/filemap.c:3998 generic_file_write_iter+0xa9/0x1d0 mm/filemap.c:4030 call_write_iter include/linux/fs.h:2212 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x802/0xf70 fs/read_write.c:594 ksys_write+0x140/0x240 fs/read_write.c:647 __do_sys_write fs/read_write.c:659 [inline] __se_sys_write fs/read_write.c:656 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:656 x64_sys_call+0x8ef/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page_list+0x134/0x9d0 mm/page_alloc.c:3671 release_pages+0xfda/0x1030 mm/swap.c:1014 __pagevec_release+0x71/0xe0 mm/swap.c:1034 pagevec_release include/linux/pagevec.h:81 [inline] shmem_undo_range+0x53f/0x13d0 mm/shmem.c:969 shmem_truncate_range mm/shmem.c:1068 [inline] shmem_evict_inode+0x1fd/0x9c0 mm/shmem.c:1150 evict+0x485/0x870 fs/inode.c:650 iput_final fs/inode.c:1779 [inline] iput+0x635/0x7c0 fs/inode.c:1805 dentry_unlink_inode+0x32f/0x3e0 fs/dcache.c:380 __dentry_kill+0x44f/0x650 fs/dcache.c:586 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x47/0x90 fs/dcache.c:893 do_renameat2+0x8ba/0xf60 fs/namei.c:4995 __do_sys_rename fs/namei.c:5039 [inline] __se_sys_rename fs/namei.c:5037 [inline] __x64_sys_rename+0x86/0x90 fs/namei.c:5037 x64_sys_call+0x680/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff888128126580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888128126600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888128126680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888128126700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888128126780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs error (device loop5): ext4_read_inline_dir:1622: 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 loop5): ext4_read_inline_dir:1622: 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 loop5): empty_inline_dir:1877: 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 loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs error (device loop5): ext4_read_inline_dir:1622: 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 loop5): ext4_read_inline_dir:1622: 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 loop5): empty_inline_dir:1877: 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 loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs error (device loop5): ext4_read_inline_dir:1622: 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 loop5): ext4_read_inline_dir:1622: 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 loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop5): empty_inline_dir:1884: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60