EXT4-fs error (device loop0): ext4_readdir:260: inode #2: block 16: comm syz-executor: path /0/bus: 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+0x423/0xc30 fs/ext4/inline.c:1480 Read of size 68 at addr ffff888116cf051a by task syz-executor/2327 CPU: 0 PID: 2327 Comm: syz-executor Not tainted 6.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf8/0x260 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x167/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 kasan_check_range+0x282/0x290 mm/kasan/generic.c:187 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ext4_read_inline_data fs/ext4/inline.c:209 [inline] ext4_read_inline_dir+0x423/0xc30 fs/ext4/inline.c:1480 ext4_readdir+0x22a/0x2e30 fs/ext4/dir.c:158 iterate_dir+0x1f0/0x500 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x1b3/0x3e0 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 RIP: 0033:0x7f02c2e39333 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 02 45 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:00007ffdd2eead58 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555555ffb520 RCX: 00007f02c2e39333 RDX: 0000000000008000 RSI: 0000555555ffb520 RDI: 0000000000000006 RBP: 0000555555ffb4f4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 0000555555ffb4f0 R15: 00007ffdd2eee0f0 Allocated by task 2671: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762 kmem_cache_alloc_bulk+0x30f/0x3b0 mm/slub.c:4048 mt_alloc_bulk lib/maple_tree.c:164 [inline] mas_alloc_nodes+0x359/0x680 lib/maple_tree.c:1304 mas_node_count_gfp lib/maple_tree.c:1362 [inline] mas_preallocate+0xf2/0x2a0 lib/maple_tree.c:5546 vma_iter_prealloc mm/internal.h:1032 [inline] mmap_region+0xe76/0x1b80 mm/mmap.c:2809 do_mmap+0x6c2/0xb80 mm/mmap.c:1362 vm_mmap_pgoff+0x218/0x3a0 mm/util.c:543 ksys_mmap_pgoff+0x2d9/0x3c0 mm/mmap.c:1408 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 Freed by task 2671: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0x122/0x1f0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook mm/slub.c:1818 [inline] slab_free mm/slub.c:3801 [inline] kmem_cache_free_bulk+0x56c/0x7a0 mm/slub.c:3919 mt_free_bulk lib/maple_tree.c:169 [inline] mas_destroy+0x27d4/0x2ee0 lib/maple_tree.c:5599 mas_store_prealloc+0x2b5/0x6c0 lib/maple_tree.c:5531 mmap_region+0xf0a/0x1b80 mm/mmap.c:2817 do_mmap+0x6c2/0xb80 mm/mmap.c:1362 vm_mmap_pgoff+0x218/0x3a0 mm/util.c:543 ksys_mmap_pgoff+0x2d9/0x3c0 mm/mmap.c:1408 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2649 [inline] call_rcu+0x159/0x8e0 kernel/rcu/tree.c:2763 ma_free_rcu lib/maple_tree.c:189 [inline] mas_free lib/maple_tree.c:1344 [inline] mas_mat_free lib/maple_tree.c:1021 [inline] mas_wmb_replace+0xef0/0x1420 lib/maple_tree.c:2801 mas_split lib/maple_tree.c:3587 [inline] mas_commit_b_node+0x2124/0x3d70 lib/maple_tree.c:3638 mas_wr_bnode lib/maple_tree.c:4315 [inline] mas_wr_modify+0xe73/0x21f0 lib/maple_tree.c:4353 mas_store_gfp+0x260/0x3d0 lib/maple_tree.c:5506 vma_iter_store_gfp mm/internal.h:1085 [inline] do_brk_flags+0x88f/0xd30 mm/mmap.c:3100 __do_sys_brk mm/mmap.c:271 [inline] __se_sys_brk+0x75c/0xb90 mm/mmap.c:190 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2649 [inline] call_rcu+0x159/0x8e0 kernel/rcu/tree.c:2763 mas_wr_node_store lib/maple_tree.c:4151 [inline] mas_wr_modify+0x1943/0x21f0 lib/maple_tree.c:4346 mas_store_prealloc+0x255/0x6c0 lib/maple_tree.c:5529 mmap_region+0xf0a/0x1b80 mm/mmap.c:2817 do_mmap+0x6c2/0xb80 mm/mmap.c:1362 vm_mmap_pgoff+0x218/0x3a0 mm/util.c:543 ksys_mmap_pgoff+0x2d9/0x3c0 mm/mmap.c:1408 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 The buggy address belongs to the object at ffff888116cf0400 which belongs to the cache maple_node of size 256 The buggy address is located 26 bytes to the right of allocated 256-byte region [ffff888116cf0400, ffff888116cf0500) The buggy address belongs to the physical page: page:ffffea00045b3c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116cf0 head:ffffea00045b3c00 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x200000000010200(slab|head|node=0|zone=2) page_type: 0xffffffff() raw: 0200000000010200 ffff888100653000 ffffea000440e480 dead000000000002 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 871, tgid 871 (modprobe), ts 28889945520, free_ts 28847028123 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x10f/0x130 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x332d/0x35a0 mm/page_alloc.c:3221 __alloc_pages+0x255/0x650 mm/page_alloc.c:4477 alloc_slab_page+0x6a/0x170 mm/slub.c:1862 allocate_slab mm/slub.c:2009 [inline] new_slab+0x70/0x270 mm/slub.c:2062 ___slab_alloc+0x834/0xd60 mm/slub.c:3215 __kmem_cache_alloc_bulk mm/slub.c:3966 [inline] kmem_cache_alloc_bulk+0x15b/0x3b0 mm/slub.c:4041 mt_alloc_bulk lib/maple_tree.c:164 [inline] mas_alloc_nodes+0x359/0x680 lib/maple_tree.c:1304 mas_node_count_gfp lib/maple_tree.c:1362 [inline] mas_preallocate+0xf2/0x2a0 lib/maple_tree.c:5546 vma_iter_prealloc mm/internal.h:1032 [inline] mmap_region+0xe76/0x1b80 mm/mmap.c:2809 do_mmap+0x6c2/0xb80 mm/mmap.c:1362 vm_mmap_pgoff+0x218/0x3a0 mm/util.c:543 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x46/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x6f/0xd9 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x807/0x930 mm/page_alloc.c:2348 free_unref_page+0x34/0x220 mm/page_alloc.c:2443 discard_slab mm/slub.c:2108 [inline] __unfreeze_partials+0x1b1/0x200 mm/slub.c:2647 put_cpu_partial+0xdc/0x120 mm/slub.c:2723 __slab_free+0x26f/0x330 mm/slub.c:3671 qlist_free_all+0x22/0x70 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x15b/0x180 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x67/0x3d0 mm/slab.h:762 slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x11f/0x2a0 mm/slub.c:3494 ptlock_alloc+0x1b/0x60 mm/memory.c:6062 ptlock_init include/linux/mm.h:2797 [inline] pgtable_pte_page_ctor include/linux/mm.h:2818 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:66 [inline] pte_alloc_one+0xb7/0x2e0 arch/x86/mm/pgtable.c:33 do_fault_around mm/memory.c:4504 [inline] do_read_fault mm/memory.c:4542 [inline] do_fault mm/memory.c:4670 [inline] do_pte_missing mm/memory.c:3664 [inline] handle_pte_fault mm/memory.c:4939 [inline] __handle_mm_fault mm/memory.c:5079 [inline] handle_mm_fault+0xc2b/0x29f0 mm/memory.c:5233 do_user_addr_fault arch/x86/mm/fault.c:1392 [inline] handle_page_fault arch/x86/mm/fault.c:1486 [inline] exc_page_fault+0x264/0x760 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 Memory state around the buggy address: ffff888116cf0400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888116cf0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888116cf0500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888116cf0580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888116cf0600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================