Hello, syzbot found the following issue on: HEAD commit: 2585cf9dfaad Linux 5.16-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1627c4d1b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=95a8e2162a0920fc dashboard link: https://syzkaller.appspot.com/bug?extid=38b79774b6c990637f95 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=140a32d5b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17b3de05b00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+38b79774b6c990637f95@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using tea hash to sort names ================================================================== BUG: KASAN: out-of-bounds in memmove include/linux/fortify-string.h:241 [inline] BUG: KASAN: out-of-bounds in leaf_paste_entries+0x449/0x910 fs/reiserfs/lbalance.c:1377 Read of size 18446744073709551584 at addr ffff888064651fa4 by task syz-executor913/3605 CPU: 1 PID: 3605 Comm: syz-executor913 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x2ed mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memmove+0x20/0x60 mm/kasan/shadow.c:54 memmove include/linux/fortify-string.h:241 [inline] leaf_paste_entries+0x449/0x910 fs/reiserfs/lbalance.c:1377 balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline] balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline] balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline] balance_leaf+0x951e/0xd8b0 fs/reiserfs/do_balan.c:1452 do_balance+0x315/0x810 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x762/0x8e0 fs/reiserfs/stree.c:2159 reiserfs_add_entry+0x8cb/0xcf0 fs/reiserfs/namei.c:567 reiserfs_mkdir+0x675/0x980 fs/reiserfs/namei.c:860 create_privroot fs/reiserfs/xattr.c:889 [inline] reiserfs_xattr_init+0x4de/0xb60 fs/reiserfs/xattr.c:1012 reiserfs_fill_super+0x21ea/0x2f80 fs/reiserfs/super.c:2175 mount_bdev+0x34d/0x410 fs/super.c:1370 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f1bcda75d2a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007ffd9ad780d8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffd9ad78130 RCX: 00007f1bcda75d2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd9ad780f0 RBP: 00007ffd9ad780f0 R08: 00007ffd9ad78130 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200002a8 R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000007 </TASK> The buggy address belongs to the page: page:ffffea0001919440 refcount:3 mapcount:0 mapping:ffff88801715bc80 index:0x3d97 pfn:0x64651 memcg:ffff8880114d4000 aops:def_blk_aops ino:700000 flags: 0xfff00000002022(referenced|active|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002022 0000000000000000 dead000000000122 ffff88801715bc80 raw: 0000000000003d97 ffff8880701d4040 00000003ffffffff ffff8880114d4000 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 3605, ts 68498864248, free_ts 15483839908 prep_new_page mm/page_alloc.c:2418 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191 folio_alloc+0x1c/0x70 mm/mempolicy.c:2201 filemap_alloc_folio mm/filemap.c:1036 [inline] __filemap_get_folio+0x5f2/0xd60 mm/filemap.c:1951 pagecache_get_page+0x2c/0x1a0 mm/folio-compat.c:125 find_or_create_page include/linux/pagemap.h:489 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow+0x1ed/0xae0 fs/buffer.c:1041 __getblk_gfp+0x6e/0x80 fs/buffer.c:1334 sb_getblk include/linux/buffer_head.h:327 [inline] search_by_key+0x3a5/0x3cc0 fs/reiserfs/stree.c:672 reiserfs_read_locked_inode+0x154/0x2160 fs/reiserfs/inode.c:1557 reiserfs_fill_super+0x1350/0x2f80 fs/reiserfs/super.c:2071 mount_bdev+0x34d/0x410 fs/super.c:1370 legacy_get_tree+0x105/0x220 fs/fs_context.c:610 vfs_get_tree+0x89/0x2f0 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3516 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1338 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1389 free_unref_page_prepare mm/page_alloc.c:3309 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3388 free_contig_range+0xa8/0xf0 mm/page_alloc.c:9271 destroy_args+0xa8/0x646 mm/debug_vm_pgtable.c:1016 debug_vm_pgtable+0x2984/0x2a16 mm/debug_vm_pgtable.c:1330 do_one_initcall+0x103/0x650 init/main.c:1297 do_initcall_level init/main.c:1370 [inline] do_initcalls init/main.c:1386 [inline] do_basic_setup init/main.c:1405 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1610 kernel_init+0x1a/0x1d0 init/main.c:1499 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffff888064651e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888064651f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888064651f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888064652000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888064652080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
