EXT4-fs error (device loop0): ext4_read_block_bitmap_nowait:476: 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:6183: Corrupt filesystem EXT4-fs (loop0): Remounting filesystem read-only ================================================================== BUG: KASAN: out-of-bounds in ext4_ext_rm_leaf fs/ext4/extents.c:2715 [inline] BUG: KASAN: out-of-bounds in ext4_ext_remove_space+0x2149/0x4a60 fs/ext4/extents.c:2937 Read of size 18446744073709551544 at addr ffff8881231b0054 by task syz-executor.0/368 CPU: 1 PID: 368 Comm: syz-executor.0 Not tainted 5.15.173-syzkaller-1077993-gf7ce2ffd2f33 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_ext_rm_leaf fs/ext4/extents.c:2715 [inline] ext4_ext_remove_space+0x2149/0x4a60 fs/ext4/extents.c:2937 ext4_punch_hole+0x794/0xbf0 fs/ext4/inode.c:4130 ext4_fallocate+0x30c/0x1f30 fs/ext4/extents.c:4763 vfs_fallocate+0x492/0x570 fs/open.c:309 do_vfs_ioctl+0x2238/0x2a80 fs/ioctl.c:853 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl+0x99/0x190 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f257333dae9 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:00007f256aadf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f257345d050 RCX: 00007f257333dae9 RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004 RBP: 00007f257338947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f257345d050 R15: 00007ffede3756b8 The buggy address belongs to the page: page:ffffea00048c6c00 refcount:2 mapcount:0 mapping:ffff8881092c1d18 index:0x3a pfn:0x1231b0 memcg:ffff88810d094000 aops:def_blk_aops ino:700000 flags: 0x4000000000002036(referenced|uptodate|lru|active|private|zone=1) raw: 4000000000002036 ffffea000485c4c8 ffff88810d08b030 ffff8881092c1d18 raw: 000000000000003a ffff888121c7e930 00000002ffffffff ffff88810d094000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x108c48(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), pid 365, ts 46560562181, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5780 __alloc_pages_node include/linux/gfp.h:591 [inline] alloc_pages_node include/linux/gfp.h:605 [inline] alloc_pages include/linux/gfp.h:618 [inline] __page_cache_alloc include/linux/pagemap.h:305 [inline] pagecache_get_page+0xb18/0xeb0 mm/filemap.c:1946 find_or_create_page include/linux/pagemap.h:418 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x21e/0x7c0 fs/buffer.c:1336 sb_getblk_gfp include/linux/buffer_head.h:368 [inline] ext4_ext_grow_indepth fs/ext4/extents.c:1330 [inline] ext4_ext_create_new_leaf fs/ext4/extents.c:1431 [inline] ext4_ext_insert_extent+0xf72/0x49d0 fs/ext4/extents.c:2102 ext4_ext_map_blocks+0x1d3e/0x7450 fs/ext4/extents.c:4360 ext4_map_blocks+0xa60/0x1c70 fs/ext4/inode.c:673 _ext4_get_block+0x23b/0x660 fs/ext4/inode.c:816 ext4_get_block+0x39/0x50 fs/ext4/inode.c:833 ext4_block_write_begin+0x5ea/0x12a0 fs/ext4/inode.c:1101 ext4_write_begin+0x6bc/0x13d0 ext4_da_write_begin+0x4a2/0xc30 fs/ext4/inode.c:2987 generic_perform_write+0x2de/0x750 mm/filemap.c:3853 ext4_buffered_write_iter+0x48a/0x610 fs/ext4/file.c:270 page_owner free stack trace missing Memory state around the buggy address: ffff8881231aff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881231aff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881231b0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8881231b0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881231b0100: 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:4351: comm syz-executor.0: Invalid inode table block 0 in block_group 0 EXT4-fs (loop0): Remounting filesystem read-only EXT4-fs error (device loop0) in ext4_reserve_inode_write:5837: Corrupt filesystem EXT4-fs (loop0): Remounting filesystem read-only EXT4-fs error (device loop0): ext4_punch_hole:4143: inode #16: comm syz-executor.0: mark_inode_dirty error EXT4-fs (loop0): Remounting filesystem read-only