================================================================== 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 ffff88812ccb8054 by task syz-executor.1/5282 CPU: 0 PID: 5282 Comm: syz-executor.1 Not tainted 6.1.75-syzkaller-1151022-gfa87a072a7fc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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 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:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffb7127cae9 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:00007ffb71ef00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffb7139c120 RCX: 00007ffb7127cae9 RDX: 0000000020000080 RSI: 000000004030582b RDI: 0000000000000004 RBP: 00007ffb712c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007ffb7139c120 R15: 00007ffcfcf19838 The buggy address belongs to the physical page: page:ffffea0004b32e00 refcount:2 mapcount:0 mapping:ffff88810bc0fdd0 index:0x3a pfn:0x12ccb8 memcg:ffff888114948000 aops:def_blk_aops ino:700001 flags: 0x5600000000002056(referenced|uptodate|lru|workingset|private|zone=1) raw: 5600000000002056 ffffea0004ac2108 ffffea00045c4188 ffff88810bc0fdd0 raw: 000000000000003a ffff88811f42fd20 00000002ffffffff ffff888114948000 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 5260, tgid 5259 (syz-executor.1), ts 175546431498, free_ts 175454678015 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_ext_map_blocks+0x1c31/0x71e0 fs/ext4/extents.c:4308 ext4_map_blocks+0xa36/0x1ca0 fs/ext4/inode.c:651 _ext4_get_block+0x23b/0x660 fs/ext4/inode.c:798 ext4_get_block+0x39/0x50 fs/ext4/inode.c:815 ext4_block_write_begin+0x55e/0x1200 fs/ext4/inode.c:1100 ext4_write_begin+0x5e0/0xfb0 ext4_da_write_begin+0x2ff/0x920 fs/ext4/inode.c:2989 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 mm/mmu_gather.c:261 [inline] tlb_finish_mmu+0x1e0/0x3f0 mm/mmu_gather.c:361 exit_mmap+0x421/0x940 mm/mmap.c:3343 __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 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87 Memory state around the buggy address: ffff88812ccb7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88812ccb7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88812ccb8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88812ccb8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88812ccb8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== EXT4-fs error (device loop1): __ext4_get_inode_loc:4497: comm syz-executor.1: Invalid inode table block 0 in block_group 0 EXT4-fs error (device loop1) in ext4_reserve_inode_write:5870: Corrupt filesystem EXT4-fs error (device loop1): ext4_punch_hole:4142: inode #16: comm syz-executor.1: mark_inode_dirty error