================================================================== 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+0x449/0xe60 fs/ext4/inline.c:1530 Read of size 68 at addr ffff8881303a1d05 by task syz-executor/463 CPU: 1 PID: 463 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:88 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106 print_address_description+0x71/0x200 mm/kasan/report.c:316 print_report+0x4a/0x60 mm/kasan/report.c:420 kasan_report+0x122/0x150 mm/kasan/report.c:524 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:210 [inline] ext4_read_inline_dir+0x449/0xe60 fs/ext4/inline.c:1530 ext4_readdir+0x3c6/0x3e10 fs/ext4/dir.c:161 iterate_dir+0x271/0x610 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 x64_sys_call+0x15c/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:218 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fbb32db8d73 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:00007fffeabd8ae8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555573df1950 RCX: 00007fbb32db8d73 RDX: 0000000000008000 RSI: 0000555573df1980 RDI: 0000000000000006 RBP: 0000555573df1980 R08: 00007fbb32f63ca0 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000293 R12: 0000555573df1954 R13: ffffffffffffffe8 R14: 0000000000000016 R15: 0000000000000001 The buggy address belongs to the physical page: page:ffffea0004c0e840 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1303a1 flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0004c0e848 ffffea0004c0e848 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffff8881303a1c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881303a1c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881303a1d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881303a1d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881303a1e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== EXT4-fs error (device loop2): ext4_read_inline_dir:1611: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0 EXT4-fs error (device loop2): ext4_read_inline_dir:1611: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0 EXT4-fs error (device loop2): empty_inline_dir:1895: inode #12: block 5: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=1633771873, rec_len=24929, size=60 fake=0 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs error (device loop2): ext4_read_inline_dir:1611: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0 EXT4-fs error (device loop2): ext4_read_inline_dir:1611: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0 EXT4-fs error (device loop2): empty_inline_dir:1895: inode #12: block 5: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=1633771873, rec_len=24929, size=60 fake=0 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs error (device loop2): ext4_read_inline_dir:1611: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0 EXT4-fs error (device loop2): ext4_read_inline_dir:1611: inode #12: block 5: comm syz-executor: path /0/file0/file0: bad entry in directory: rec_len % 4 != 0 - offset=24, inode=1633771873, rec_len=24929, size=148 fake=0 EXT4-fs error (device loop2): empty_inline_dir:1895: inode #12: block 5: comm syz-executor: bad entry in directory: rec_len % 4 != 0 - offset=4, inode=1633771873, rec_len=24929, size=60 fake=0 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs warning (device loop2): empty_inline_dir:1902: bad inline directory (dir #12) - inode 1633771873, rec_len 24929, name_len 97inline size 60 EXT4-fs (loop2): unmounting filesystem.