EXT4-fs error (device loop2): ext4_readdir:260: inode #2: block 48: comm syz-executor: path /12/file0: bad entry in directory: rec_len is smaller than minimal - offset=980, inode=0, rec_len=0, size=1024 fake=0 ================================================================== 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+0x48b/0xdf0 fs/ext4/inline.c:1483 Read of size 836 at addr ffff88802d65da05 by task syz-executor/5222 CPU: 0 UID: 0 PID: 5222 Comm: syz-executor Not tainted 6.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ext4_read_inline_data fs/ext4/inline.c:209 [inline] ext4_read_inline_dir+0x48b/0xdf0 fs/ext4/inline.c:1483 ext4_readdir+0x3bb/0x3500 fs/ext4/dir.c:158 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efe017ac013 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 52 43 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:00007ffdc648cbe8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 000055559029e640 RCX: 00007efe017ac013 RDX: 0000000000008000 RSI: 000055559029e640 RDI: 0000000000000006 RBP: 000055559029e614 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 000055559029e610 R15: 00007ffdc648ff80 Allocated by task 5210: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 vma_lock_alloc kernel/fork.c:445 [inline] vm_area_alloc+0x10e/0x1d0 kernel/fork.c:476 mmap_region+0xc3d/0x2090 mm/mmap.c:2944 do_mmap+0x8f9/0x1010 mm/mmap.c:1468 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1514 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5210: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4548 vma_lock_free kernel/fork.c:457 [inline] __vm_area_free+0xe3/0x110 kernel/fork.c:513 remove_vma mm/mmap.c:187 [inline] exit_mmap+0x645/0xc80 mm/mmap.c:3436 __mmput+0x115/0x380 kernel/fork.c:1345 exit_mm+0x220/0x310 kernel/exit.c:571 do_exit+0x9b2/0x27f0 kernel/exit.c:869 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 __do_sys_exit_group kernel/exit.c:1042 [inline] __se_sys_exit_group kernel/exit.c:1040 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802d65d948 which belongs to the cache vma_lock of size 152 The buggy address is located 37 bytes to the right of allocated 152-byte region [ffff88802d65d948, ffff88802d65d9e0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2d65d memcg:ffff888022f74401 anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff8880162fdc80 ffffea00006ee000 0000000000000005 raw: 0000000000000000 0000000000120012 00000001fdffffff ffff888022f74401 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 4875, tgid 4875 (wait_iface), ts 32220113935, free_ts 32220006290 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2321 allocate_slab+0x5a/0x2f0 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4044 vma_lock_alloc kernel/fork.c:445 [inline] vm_area_dup+0x61/0x290 kernel/fork.c:498 __split_vma+0x1a9/0xc30 mm/mmap.c:2465 do_vmi_align_munmap+0x388/0x18c0 mm/mmap.c:2663 do_vmi_munmap+0x261/0x2f0 mm/mmap.c:2830 __vm_munmap+0x1fc/0x400 mm/mmap.c:3109 elf_map fs/binfmt_elf.c:383 [inline] elf_load+0x2d8/0x6f0 fs/binfmt_elf.c:408 load_elf_binary+0x1027/0x2680 fs/binfmt_elf.c:1167 search_binary_handler fs/exec.c:1827 [inline] exec_binprm fs/exec.c:1869 [inline] bprm_execve+0xaf8/0x1770 fs/exec.c:1920 page last free pid 4875 tgid 4875 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_folios+0x100f/0x1ac0 mm/page_alloc.c:2660 folios_put_refs+0x76e/0x860 mm/swap.c:1039 free_pages_and_swap_cache+0x5c8/0x690 mm/swap_state.c:335 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465 shift_arg_pages fs/exec.c:781 [inline] setup_arg_pages+0xd2d/0x1000 fs/exec.c:880 load_elf_binary+0xb80/0x2680 fs/binfmt_elf.c:1014 search_binary_handler fs/exec.c:1827 [inline] exec_binprm fs/exec.c:1869 [inline] bprm_execve+0xaf8/0x1770 fs/exec.c:1920 do_execveat_common+0x55f/0x6f0 fs/exec.c:2027 do_execve fs/exec.c:2101 [inline] __do_sys_execve fs/exec.c:2177 [inline] __se_sys_execve fs/exec.c:2172 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2172 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88802d65d900: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb ffff88802d65d980: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff88802d65da00: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88802d65da80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 ffff88802d65db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================