REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ================================================================== BUG: KASAN: use-after-free in leaf_paste_in_buffer+0x635/0xab0 Read of size 48 at addr ffff888072f36ff0 by task syz-executor145/5005 CPU: 0 PID: 5005 Comm: syz-executor145 Not tainted 6.4.0-rc7-syzkaller-00014-g692b7dc87ca6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 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:351 [inline] print_report+0x163/0x540 mm/kasan/report.c:462 kasan_report+0x176/0x1b0 mm/kasan/report.c:572 kasan_check_range+0x283/0x290 mm/kasan/generic.c:187 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 leaf_paste_in_buffer+0x635/0xab0 leaf_copy_dir_entries+0x71e/0xc60 fs/reiserfs/lbalance.c:108 leaf_copy_boundary_item+0xbbe/0x21b0 fs/reiserfs/lbalance.c:168 leaf_copy_items fs/reiserfs/lbalance.c:551 [inline] leaf_move_items+0xd1a/0x2960 fs/reiserfs/lbalance.c:726 leaf_shift_left+0xbe/0x430 fs/reiserfs/lbalance.c:750 balance_leaf+0x15d1/0x12510 fs/reiserfs/do_balan.c:1409 do_balance+0x30d/0x8f0 fs/reiserfs/do_balan.c:1888 reiserfs_insert_item+0xacc/0xc30 fs/reiserfs/stree.c:2259 reiserfs_get_block+0x20ae/0x5130 fs/reiserfs/inode.c:868 __block_write_begin_int+0x548/0x1a50 fs/buffer.c:2064 reiserfs_write_begin+0x24d/0x520 fs/reiserfs/inode.c:2773 generic_perform_write+0x300/0x5e0 mm/filemap.c:3929 __generic_file_write_iter+0x17a/0x400 mm/filemap.c:4057 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4089 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x790/0xb20 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 RIP: 0033:0x7fd880cb7a19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe3d3d76b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000000fdad RCX: 00007fd880cb7a19 RDX: 000000000000000f RSI: 0000000020000100 RDI: 0000000000000006 RBP: 0000000000000000 R08: 00007ffe3d3d76e0 R09: 00007ffe3d3d76e0 R10: 00007ffe3d3d76e0 R11: 0000000000000246 R12: 00007ffe3d3d76dc R13: 00007ffe3d3d7710 R14: 00007ffe3d3d76f0 R15: 0000000000000003 The buggy address belongs to the physical page: page:ffffea0001cbcd80 refcount:3 mapcount:0 mapping:ffff888148c8c9e8 index:0x214 pfn:0x72f36 memcg:ffff888141264000 aops:def_blk_aops ino:700000 flags: 0xfff00000002022(referenced|active|private|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000002022 0000000000000000 dead000000000122 ffff888148c8c9e8 raw: 0000000000000214 ffff888074a63570 00000003ffffffff ffff888141264000 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 5005, tgid 5005 (syz-executor145), ts 65496090521, free_ts 65495795076 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768 folio_alloc+0x1e/0x60 mm/mempolicy.c:2289 filemap_alloc_folio+0xde/0x500 mm/filemap.c:976 __filemap_get_folio+0x323/0xa00 mm/filemap.c:1971 pagecache_get_page+0x2e/0x220 mm/folio-compat.c:99 find_or_create_page include/linux/pagemap.h:635 [inline] grow_dev_page fs/buffer.c:995 [inline] grow_buffers fs/buffer.c:1060 [inline] __getblk_slow fs/buffer.c:1087 [inline] __getblk_gfp+0x211/0xcc0 fs/buffer.c:1382 sb_getblk include/linux/buffer_head.h:365 [inline] get_empty_nodes+0x8c5/0xd70 fs/reiserfs/fix_node.c:890 fix_nodes+0x2617/0x8ce0 fs/reiserfs/fix_node.c:2662 reiserfs_insert_item+0x9e8/0xc30 fs/reiserfs/stree.c:2238 indirect2direct+0x699/0xc00 fs/reiserfs/tail_conversion.c:283 maybe_indirect_to_direct fs/reiserfs/stree.c:1585 [inline] reiserfs_cut_from_item+0xba6/0x2580 fs/reiserfs/stree.c:1692 reiserfs_do_truncate+0xa16/0x15c0 fs/reiserfs/stree.c:1971 reiserfs_truncate_file+0x4da/0x820 fs/reiserfs/inode.c:2308 reiserfs_setattr+0xbc9/0x1140 fs/reiserfs/inode.c:3393 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2564 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2705 release_pages+0x2193/0x2470 mm/swap.c:1042 __pagevec_release+0x84/0x100 mm/swap.c:1062 pagevec_release include/linux/pagevec.h:63 [inline] folio_batch_release include/linux/pagevec.h:132 [inline] truncate_inode_pages_range+0x45d/0x11b0 mm/truncate.c:372 truncate_inode_pages mm/truncate.c:449 [inline] truncate_pagecache mm/truncate.c:744 [inline] truncate_setsize+0xcf/0xf0 mm/truncate.c:769 reiserfs_setattr+0xbbc/0x1140 fs/reiserfs/inode.c:3392 notify_change+0xc8b/0xf40 fs/attr.c:483 do_truncate+0x220/0x300 fs/open.c:66 do_sys_ftruncate+0x2e4/0x380 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 Memory state around the buggy address: ffff888072f36f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888072f36f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888072f37000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888072f37080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888072f37100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================