EXT4-fs error (device loop0): ext4_read_block_bitmap_nowait:438: comm syz-executor.0: Invalid block bitmap block 0 in block_group 0 EXT4-fs (loop0): Remounting filesystem read-only EXT4-fs error (device loop0) in ext4_mb_clear_bb:6077: Corrupt filesystem ================================================================== 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 18446744073709551544 at addr ffff888125ff0054 by task syz-executor.0/453 CPU: 1 PID: 453 Comm: syz-executor.0 Not tainted 6.1.25-syzkaller-00071-gb1644a0031cf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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:284 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:395 kasan_report+0x13c/0x170 mm/kasan/report.c:495 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:4122 ext4_fallocate+0x318/0x1e90 fs/ext4/extents.c:4708 vfs_fallocate+0x492/0x570 fs/open.c:323 do_vfs_ioctl+0x2150/0x29a0 fs/ioctl.c:849 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x99/0x190 fs/ioctl.c:856 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ff00a27cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff00af040c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff00a39c050 RCX: 00007ff00a27cae9 RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004 RBP: 00007ff00a2c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff00a39c050 R15: 00007ffd259f1ef8 The buggy address belongs to the physical page: page:ffffea000497fc00 refcount:2 mapcount:0 mapping:ffff888100483450 index:0x3a pfn:0x125ff0 memcg:ffff88810f648000 aops:def_blk_aops ino:700000 flags: 0x4e00000000002056(referenced|uptodate|lru|workingset|private|zone=1) raw: 4e00000000002056 ffffea000493c2c8 ffffea0004368b88 ffff888100483450 raw: 000000000000003a ffff8881248c0f18 00000002ffffffff ffff88810f648000 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 450, tgid 449 (syz-executor.0), ts 46501744664, free_ts 46429117619 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e2/0x1f0 mm/page_alloc.c:2533 prep_new_page mm/page_alloc.c:2540 [inline] get_page_from_freelist+0x2e7a/0x2f50 mm/page_alloc.c:4292 __alloc_pages+0x3c2/0x7d0 mm/page_alloc.c:5559 __folio_alloc+0x15/0x40 mm/page_alloc.c:5591 __folio_alloc_node include/linux/gfp.h:246 [inline] folio_alloc include/linux/gfp.h:275 [inline] filemap_alloc_folio include/linux/pagemap.h:474 [inline] __filemap_get_folio+0x6c0/0x970 mm/filemap.c:1965 pagecache_get_page+0x2f/0x110 mm/folio-compat.c:110 find_or_create_page include/linux/pagemap.h:613 [inline] grow_dev_page fs/buffer.c:946 [inline] grow_buffers fs/buffer.c:1011 [inline] __getblk_slow fs/buffer.c:1038 [inline] __getblk_gfp+0x205/0x7d0 fs/buffer.c:1333 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_ext_map_blocks+0x1c31/0x71e0 fs/ext4/extents.c:4308 ext4_map_blocks+0xa42/0x1ce0 fs/ext4/inode.c:651 _ext4_get_block+0x23b/0x660 fs/ext4/inode.c:808 ext4_get_block+0x39/0x50 fs/ext4/inode.c:825 ext4_block_write_begin+0x57a/0x1190 fs/ext4/inode.c:1098 ext4_write_begin+0x5e0/0xfb0 ext4_da_write_begin+0x2ff/0x920 fs/ext4/inode.c:2986 generic_perform_write+0x2f9/0x5c0 mm/filemap.c:3754 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1460 [inline] free_pcp_prepare mm/page_alloc.c:1533 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3388 free_unref_page_list+0xf6/0x6c0 mm/page_alloc.c:3530 release_pages+0xf7f/0xfe0 mm/swap.c:1055 __pagevec_release+0x84/0x100 mm/swap.c:1075 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x465/0xf10 mm/truncate.c:373 truncate_inode_pages+0x24/0x30 mm/truncate.c:452 kill_bdev block/bdev.c:76 [inline] blkdev_flush_mapping+0x15b/0x2c0 block/bdev.c:662 blkdev_put_whole block/bdev.c:693 [inline] blkdev_put+0x4f7/0x790 block/bdev.c:953 kill_block_super+0xb3/0xe0 fs/super.c:1453 deactivate_locked_super+0xa5/0x110 fs/super.c:332 deactivate_super+0xbe/0xf0 fs/super.c:363 cleanup_mnt+0x485/0x510 fs/namespace.c:1186 __cleanup_mnt+0x19/0x20 fs/namespace.c:1193 task_work_run+0x24d/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x8b/0xa0 kernel/entry/common.c:171 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:204 Memory state around the buggy address: ffff888125feff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888125feff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888125ff0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888125ff0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888125ff0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop0): __ext4_get_inode_loc:4490: comm syz-executor.0: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop0) in ext4_reserve_inode_write:5839: Corrupt filesystem EXT4-fs error (device loop0): ext4_punch_hole:4135: inode #16: comm syz-executor.0: mark_inode_dirty error