EXT4-fs error (device loop2): ext4_free_blocks:6197: comm syz.2.9849: Freeing blocks not in datazone - block = 20, count = 1 EXT4-fs (loop2): Remounting filesystem read-only ================================================================== BUG: KASAN: out-of-bounds in ext4_ext_rm_leaf fs/ext4/extents.c:2737 [inline] BUG: KASAN: out-of-bounds in ext4_ext_remove_space+0x1e16/0x4f50 fs/ext4/extents.c:2959 Read of size 18446744073709551604 at addr ffff88813ba1a018 by task syz.2.9849/32516 CPU: 0 PID: 32516 Comm: syz.2.9849 Not tainted 6.1.78-syzkaller-00050-g76d91af9daec #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_ext_rm_leaf fs/ext4/extents.c:2737 [inline] ext4_ext_remove_space+0x1e16/0x4f50 fs/ext4/extents.c:2959 ext4_punch_hole+0x794/0xc00 fs/ext4/inode.c:4129 ext4_fallocate+0x318/0x1e90 fs/ext4/extents.c:4708 vfs_fallocate+0x492/0x570 fs/open.c:324 ksys_fallocate fs/open.c:347 [inline] __do_sys_fallocate fs/open.c:355 [inline] __se_sys_fallocate fs/open.c:353 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:353 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe1fe775b99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe1ff497048 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007fe1fe904078 RCX: 00007fe1fe775b99 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007fe1fe7f677e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001a00 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fe1fe904078 R15: 00007ffd1f474fd8 The buggy address belongs to the physical page: page:ffffea0004ee8680 refcount:2 mapcount:0 mapping:ffff88810b811c50 index:0x3f pfn:0x13ba1a memcg:ffff88810fc3c000 aops:def_blk_aops ino:700002 flags: 0x5600000000002056(referenced|uptodate|lru|workingset|private|zone=1) raw: 5600000000002056 ffffea0004f35d08 ffffea000446cd08 ffff88810b811c50 raw: 000000000000003f ffff88812af0f498 00000002ffffffff ffff88810fc3c000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 32512, tgid 32511 (syz.2.9849), ts 1480787762391, free_ts 1480636234503 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597 get_page_from_freelist+0x27ea/0x2870 mm/page_alloc.c:4425 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5712 __folio_alloc+0x15/0x40 mm/page_alloc.c:5744 __folio_alloc_node include/linux/gfp.h:245 [inline] folio_alloc include/linux/gfp.h:274 [inline] filemap_alloc_folio include/linux/pagemap.h:507 [inline] __filemap_get_folio+0x827/0xae0 mm/filemap.c:1983 pagecache_get_page+0x2f/0x110 mm/folio-compat.c:110 find_or_create_page include/linux/pagemap.h:648 [inline] grow_dev_page fs/buffer.c:989 [inline] grow_buffers fs/buffer.c:1054 [inline] __getblk_slow fs/buffer.c:1081 [inline] __getblk_gfp+0x205/0x7d0 fs/buffer.c:1376 sb_getblk_gfp include/linux/buffer_head.h:363 [inline] ext4_ext_grow_indepth fs/ext4/extents.c:1334 [inline] ext4_ext_create_new_leaf fs/ext4/extents.c:1435 [inline] ext4_ext_insert_extent+0xfd2/0x4e00 fs/ext4/extents.c:2102 ext4_split_extent_at+0x863/0x11f0 fs/ext4/extents.c:3254 ext4_split_extent+0x1bd/0x4e0 fs/ext4/extents.c:3355 ext4_split_convert_extents fs/ext4/extents.c:3714 [inline] ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3876 [inline] ext4_ext_map_blocks+0x211e/0x71e0 fs/ext4/extents.c:4168 ext4_map_blocks+0xa36/0x1ca0 fs/ext4/inode.c:651 mpage_map_one_extent fs/ext4/inode.c:2423 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2476 [inline] ext4_writepages+0x17b5/0x3fd0 fs/ext4/inode.c:2844 do_writepages+0x385/0x620 mm/page-writeback.c:2472 filemap_fdatawrite_wbc+0x153/0x1b0 mm/filemap.c:402 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1498 [inline] free_pcp_prepare mm/page_alloc.c:1572 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3498 free_unref_page_list+0xf1/0x7b0 mm/page_alloc.c:3646 release_pages+0xf7f/0xfe0 mm/swap.c:1063 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:314 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xfe/0x1d0 mm/mmu_gather.c:261 zap_pte_range mm/memory.c:1540 [inline] zap_pmd_range mm/memory.c:1589 [inline] zap_pud_range mm/memory.c:1618 [inline] zap_p4d_range mm/memory.c:1639 [inline] unmap_page_range+0x219d/0x2480 mm/memory.c:1660 unmap_single_vma mm/memory.c:1706 [inline] unmap_vmas+0x4e4/0x660 mm/memory.c:1746 exit_mmap+0x2d1/0x940 mm/mmap.c:3336 __mmput+0x95/0x310 kernel/fork.c:1298 mmput+0x56/0x170 kernel/fork.c:1321 exit_mm kernel/exit.c:566 [inline] do_exit+0xb29/0x2b80 kernel/exit.c:862 do_group_exit+0x21a/0x2d0 kernel/exit.c:1025 get_signal+0x169d/0x1820 kernel/signal.c:2880 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x74/0xa0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:204 Memory state around the buggy address: ffff88813ba19f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88813ba19f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88813ba1a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88813ba1a080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88813ba1a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Disabling lock debugging due to