REISERFS (device loop0): using 3.5.x disk format REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ================================================================== BUG: KASAN: out-of-bounds in leaf_paste_in_buffer+0x1bc/0xab0 fs/reiserfs/lbalance.c:1017 Read of size 18446744073709551365 at addr ffff888075a28000 by task syz-executor537/5034 CPU: 0 PID: 5034 Comm: syz-executor537 Not tainted 6.6.0-rc7-syzkaller-00151-g56567a20b22b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:187 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 leaf_paste_in_buffer+0x1bc/0xab0 fs/reiserfs/lbalance.c:1017 balance_leaf_new_nodes_paste_whole fs/reiserfs/do_balan.c:1171 [inline] balance_leaf_new_nodes_paste fs/reiserfs/do_balan.c:1215 [inline] balance_leaf_new_nodes fs/reiserfs/do_balan.c:1246 [inline] balance_leaf+0x6680/0x12510 fs/reiserfs/do_balan.c:1450 do_balance+0x30d/0x8f0 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x732/0x870 fs/reiserfs/stree.c:2157 reiserfs_get_block+0x2250/0x5130 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x54d/0x1ac0 fs/buffer.c:2120 reiserfs_write_begin+0x24d/0x520 fs/reiserfs/inode.c:2771 generic_cont_expand_simple+0x18b/0x2a0 fs/buffer.c:2476 reiserfs_setattr+0x57d/0x1140 fs/reiserfs/inode.c:3302 notify_change+0xb99/0xe60 fs/attr.c:499 do_truncate+0x220/0x300 fs/open.c:66 do_sys_ftruncate+0x2f3/0x390 fs/open.c:194 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fac36ffe639 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe5a191348 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007ffe5a191518 RCX: 00007fac36ffe639 RDX: 00007fac370399f3 RSI: 0000000002007fff RDI: 0000000000000004 RBP: 00007fac37072610 R08: 0000000000000000 R09: 00007ffe5a191518 R10: 00000000000010f1 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe5a191508 R14: 0000000000000001 R15: 0000000000000001 The buggy address belongs to the physical page: page:ffffea0001d68a00 refcount:2 mapcount:0 mapping:ffff888078594ad8 index:0x1948 pfn:0x75a28 memcg:ffff888015e52000 aops:ext4_da_aops ino:783 dentry name:"syz-execprog" flags: 0xfff00000008038(uptodate|dirty|lru|private|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000008038 ffffea0001d81c08 ffffea0001d89f08 ffff888078594ad8 raw: 0000000000001948 ffff888075d6e1d0 00000002ffffffff ffff888015e52000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x141cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_WRITE), pid 4887, tgid 4887 (sftp-server), ts 61448146497, free_ts 61431964942 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 folio_alloc+0x1e/0x60 mm/mempolicy.c:2309 filemap_alloc_folio+0xde/0x500 mm/filemap.c:976 __filemap_get_folio+0x431/0xbb0 mm/filemap.c:1936 ext4_da_write_begin+0x5b5/0xa40 fs/ext4/inode.c:2881 generic_perform_write+0x31b/0x630 mm/filemap.c:3969 ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299 ext4_file_write_iter+0x1d3/0x1ad0 fs/ext4/file.c:717 call_write_iter include/linux/fs.h:1956 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x782/0xaf0 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2451 release_pages+0x2113/0x23f0 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline] tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu+0x34c/0x4e0 mm/mmu_gather.c:300 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:392 exit_mmap+0x4d3/0xc50 mm/mmap.c:3243 __mmput+0x115/0x3c0 kernel/fork.c:1349 exit_mm+0x21f/0x300 kernel/exit.c:567 do_exit+0x9af/0x2650 kernel/exit.c:861 do_group_exit+0x206/0x2c0 kernel/exit.c:1024 __do_sys_exit_group kernel/exit.c:1035 [inline] __se_sys_exit_group kernel/exit.c:1033 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888075a27f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888075a27f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888075a28000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888075a28080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888075a28100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================