================================================================== BUG: KASAN: slab-out-of-bounds in ext4_read_inline_data fs/ext4/inline.c:209 [inline] BUG: KASAN: slab-out-of-bounds in ext4_read_inline_dir+0x435/0xd90 fs/ext4/inline.c:1515 Read of size 68 at addr ffff88811af726d3 by task syz-executor/476 CPU: 0 PID: 476 Comm: syz-executor Not tainted 5.10.240-syzkaller-1008085-g1154f779f3f3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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:1515 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: 0033:0x7f75651fe313 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:00007ffce4461138 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555584183520 RCX: 00007f75651fe313 RDX: 0000000000008000 RSI: 0000555584183520 RDI: 0000000000000006 RBP: 00005555841834f4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 00005555841834f0 R15: 00007ffce44644e0 Allocated by task 185: 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:583 slab_alloc_node mm/slub.c:2947 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960 anon_vma_alloc mm/rmap.c:90 [inline] __anon_vma_prepare+0x9a/0x420 mm/rmap.c:199 anon_vma_prepare include/linux/rmap.h:171 [inline] do_cow_fault mm/memory.c:4415 [inline] do_fault mm/memory.c:4529 [inline] handle_pte_fault+0x2e5c/0x3750 mm/memory.c:4791 __handle_mm_fault mm/memory.c:4944 [inline] handle_mm_fault+0xf3f/0x16a0 mm/memory.c:5358 do_user_addr_fault+0x5a2/0xc80 arch/x86/mm/fault.c:1362 handle_page_fault arch/x86/mm/fault.c:1428 [inline] exc_page_fault+0x5a/0xc0 arch/x86/mm/fault.c:1484 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 The buggy address belongs to the object at ffff88811af72678 which belongs to the cache anon_vma of size 120 The buggy address is located 91 bytes inside of 120-byte region [ffff88811af72678, ffff88811af726f0) The buggy address belongs to the page: page:ffffea00046bdc80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11af72 flags: 0x4000000000000200(slab) raw: 4000000000000200 ffffea0004308600 0000000700000007 ffff88810004de00 raw: 0000000000000000 0000000000160016 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 164, ts 5222351855, 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:5357 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1808 [inline] new_slab+0x84/0x3f0 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x2a6/0x450 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x1af/0x2e0 mm/slub.c:2960 anon_vma_alloc mm/rmap.c:90 [inline] anon_vma_fork+0xf2/0x510 mm/rmap.c:356 dup_mmap kernel/fork.c:567 [inline] dup_mm kernel/fork.c:1435 [inline] copy_mm+0x95e/0x1480 kernel/fork.c:1491 copy_process+0x1187/0x32c0 kernel/fork.c:2268 kernel_clone+0x23f/0x940 kernel/fork.c:2650 __do_sys_clone kernel/fork.c:2776 [inline] __se_sys_clone kernel/fork.c:2760 [inline] __x64_sys_clone+0x176/0x1d0 kernel/fork.c:2760 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: ffff88811af72580: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff88811af72600: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 >ffff88811af72680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc ^ ffff88811af72700: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 ffff88811af72780: 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 ================================================================== EXT4-fs error (device loop6): ext4_read_inline_dir:1596: 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 loop6): ext4_read_inline_dir:1596: 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 loop6): empty_inline_dir:1850: 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 loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs error (device loop6): ext4_read_inline_dir:1596: 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 loop6): ext4_read_inline_dir:1596: 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 loop6): empty_inline_dir:1850: 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 loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs error (device loop6): ext4_read_inline_dir:1596: 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 loop6): ext4_read_inline_dir:1596: 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 loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60 EXT4-fs warning (device loop6): empty_inline_dir:1857: bad inline directory (dir #12) - inode 2239623941, rec_len 29527, name_len 58inline size 60