================================================================== BUG: KASAN: out-of-bounds in ext4_ext_rm_leaf fs/ext4/extents.c:2735 [inline] BUG: KASAN: out-of-bounds in ext4_ext_remove_space+0x2149/0x4a60 fs/ext4/extents.c:2957 Read of size 18446744073709551544 at addr ffff88811aee3054 by task syz-executor347/307 CPU: 0 PID: 307 Comm: syz-executor347 Not tainted 5.15.120-syzkaller-00229-g748fd0d9ca0f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 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:2735 [inline] ext4_ext_remove_space+0x2149/0x4a60 fs/ext4/extents.c:2957 ext4_punch_hole+0x794/0xbf0 fs/ext4/inode.c:4129 ext4_fallocate+0x30c/0x1f10 fs/ext4/extents.c:4711 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 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+0x61/0xcb RIP: 0033:0x7f9520578e19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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:00007f9518154218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f95206006d8 RCX: 00007f9520578e19 RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004 RBP: 00007f95206006d0 R08: 00007ffe005087d7 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f95205cd578 R13: 000000000000000b R14: 00007ffe005086f0 R15: 6f6f6c2f7665642f The buggy address belongs to the page: page:ffffea00046bb8c0 refcount:2 mapcount:0 mapping:ffff888109192c98 index:0x3a pfn:0x11aee3 memcg:ffff8881001f8000 aops:def_blk_aops ino:700000 flags: 0x4000000000002036(referenced|uptodate|lru|active|private|zone=1) raw: 4000000000002036 ffffea00046da308 ffffea00046da408 ffff888109192c98 raw: 000000000000003a ffff88811bd1bb28 00000002ffffffff ffff8881001f8000 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 304, ts 23868189950, free_ts 23787864920 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2600 prep_new_page mm/page_alloc.c:2606 [inline] get_page_from_freelist+0x2ed2/0x2f90 mm/page_alloc.c:4474 __alloc_pages+0x206/0x5e0 mm/page_alloc.c:5765 __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:1940 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:1328 [inline] ext4_ext_create_new_leaf fs/ext4/extents.c:1429 [inline] ext4_ext_insert_extent+0xf7a/0x4b10 fs/ext4/extents.c:2099 ext4_ext_map_blocks+0x1c61/0x7250 fs/ext4/extents.c:4308 ext4_map_blocks+0xaa7/0x1e30 fs/ext4/inode.c:646 _ext4_get_block+0x23b/0x660 fs/ext4/inode.c:803 ext4_get_block+0x39/0x50 fs/ext4/inode.c:820 ext4_block_write_begin+0x5ea/0x12a0 fs/ext4/inode.c:1088 ext4_write_begin+0x6bc/0x13d0 ext4_da_write_begin+0x4a2/0xc30 fs/ext4/inode.c:2986 generic_perform_write+0x2bc/0x5a0 mm/filemap.c:3833 ext4_buffered_write_iter+0x48a/0x610 fs/ext4/file.c:270 ext4_file_write_iter+0x443/0x1c80 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1467 [inline] free_pcp_prepare mm/page_alloc.c:1539 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3523 free_unref_page_list+0x14b/0xa60 mm/page_alloc.c:3660 release_pages+0x1310/0x1370 mm/swap.c:1009 __pagevec_release+0x84/0x100 mm/swap.c:1029 pagevec_release include/linux/pagevec.h:81 [inline] shmem_undo_range+0x604/0x1560 mm/shmem.c:965 shmem_truncate_range mm/shmem.c:1064 [inline] shmem_evict_inode+0x215/0x9d0 mm/shmem.c:1146 evict+0x2a3/0x630 fs/inode.c:587 iput_final fs/inode.c:1663 [inline] iput+0x63b/0x7e0 fs/inode.c:1689 dentry_unlink_inode+0x34f/0x440 fs/dcache.c:376 __dentry_kill+0x447/0x660 fs/dcache.c:582 dentry_kill+0xc0/0x2a0 dput+0x165/0x320 fs/dcache.c:888 __fput+0x662/0x910 fs/file_table.c:288 ____fput+0x15/0x20 fs/file_table.c:308 task_work_run+0x129/0x190 kernel/task_work.c:164 ptrace_notify+0x29e/0x350 kernel/signal.c:2383 Memory state around the buggy address: ffff88811aee2f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88811aee2f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88811aee3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88811aee3080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811aee3100: 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:4350: comm syz-executor347: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop0) in ext4_reserve_inode_write:5830: Corrupt filesystem EXT4-fs error (device loop0): ext4_punch_hole:4142: inode #16: comm syz-executor347: mark_inode_dirty error