syzbot

loop0: detected capacity change from 0 to 512
==================================================================
BUG: KASAN: slab-use-after-free in check_igot_inode+0x187/0x1b0 fs/ext4/inode.c:4664
Read of size 8 at addr ffff88808219bad0 by task syz-executor.0/12683

CPU: 0 PID: 12683 Comm: syz-executor.0 Not tainted 6.7.0-rc2-syzkaller-00195-g0f5cc96c367f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 check_igot_inode+0x187/0x1b0 fs/ext4/inode.c:4664
 __ext4_iget+0x14f5/0x4350 fs/ext4/inode.c:4716
 __ext4_fill_super fs/ext4/super.c:5482 [inline]
 ext4_fill_super+0x6802/0xaf10 fs/ext4/super.c:5712
 get_tree_bdev+0x3b5/0x650 fs/super.c:1598
 vfs_get_tree+0x8c/0x370 fs/super.c:1771
 do_new_mount fs/namespace.c:3337 [inline]
 path_mount+0x1492/0x1ed0 fs/namespace.c:3664
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount fs/namespace.c:3863 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f669a07e1ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f669ad3eee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f669ad3ef80 RCX: 00007f669a07e1ea
RDX: 00000000200000c0 RSI: 0000000020000500 RDI: 00007f669ad3ef40
RBP: 00000000200000c0 R08: 00007f669ad3ef80 R09: 0000000002018412
R10: 0000000002018412 R11: 0000000000000202 R12: 0000000020000500
R13: 00007f669ad3ef40 R14: 000000000000053d R15: 0000000020000080
 </TASK>

Allocated by task 22765:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:763 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc_lru+0x219/0x6f0 mm/slub.c:3509
 alloc_inode_sb include/linux/fs.h:2937 [inline]
 reiserfs_alloc_inode+0x26/0xb0 fs/reiserfs/super.c:642
 alloc_inode+0x5d/0x220 fs/inode.c:261
 new_inode_pseudo fs/inode.c:1006 [inline]
 new_inode+0x22/0x260 fs/inode.c:1032
 reiserfs_mkdir+0x214/0x9a0 fs/reiserfs/namei.c:813
 create_privroot fs/reiserfs/xattr.c:891 [inline]
 reiserfs_xattr_init+0x4e3/0xae0 fs/reiserfs/xattr.c:1007
 reiserfs_fill_super+0x2139/0x3160 fs/reiserfs/super.c:2175
 mount_bdev+0x1f3/0x2e0 fs/super.c:1650
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x370 fs/super.c:1771
 do_new_mount fs/namespace.c:3337 [inline]
 path_mount+0x1492/0x1ed0 fs/namespace.c:3664
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount fs/namespace.c:3863 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 __call_rcu_common.constprop.0+0x9a/0x7a0 kernel/rcu/tree.c:2681
 destroy_inode+0x129/0x1b0 fs/inode.c:316
 dispose_list+0x117/0x1e0 fs/inode.c:699
 evict_inodes+0x34f/0x450 fs/inode.c:749
 generic_shutdown_super+0xb5/0x3d0 fs/super.c:675
 kill_block_super+0x3b/0x90 fs/super.c:1667
 deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
 deactivate_super+0xde/0x100 fs/super.c:517
 cleanup_mnt+0x222/0x450 fs/namespace.c:1256
 task_work_run+0x14d/0x240 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x217/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Second to last potentially related work creation:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492
 __call_rcu_common.constprop.0+0x9a/0x7a0 kernel/rcu/tree.c:2681
 destroy_inode+0x129/0x1b0 fs/inode.c:316
 dispose_list+0x117/0x1e0 fs/inode.c:699
 evict_inodes+0x34f/0x450 fs/inode.c:749
 generic_shutdown_super+0xb5/0x3d0 fs/super.c:675
 kill_block_super+0x3b/0x90 fs/super.c:1667
 deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
 deactivate_super+0xde/0x100 fs/super.c:517
 cleanup_mnt+0x222/0x450 fs/namespace.c:1256
 task_work_run+0x14d/0x240 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x217/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

The buggy address belongs to the object at ffff88808219b500
 which belongs to the cache reiser_inode_cache of size 1568
The buggy address is located 1488 bytes inside of
 freed 1568-byte region [ffff88808219b500, ffff88808219bb20)

The buggy address belongs to the physical page:
page:ffffea0002086600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88808219f740 pfn:0x82198
head:ffffea0002086600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880276e5301
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff8881422b98c0 ffffea0000f8fc00 dead000000000002
raw: ffff88808219f740 0000000080130001 00000001ffffffff ffff8880276e5301
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 11575, tgid 11571 (syz-executor.4), ts 1855279276769, free_ts 1851851425367
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1544 [inline]
 get_page_from_freelist+0xa25/0x36d0 mm/page_alloc.c:3312
 __alloc_pages+0x22e/0x2420 mm/page_alloc.c:4568
 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133
 alloc_slab_page mm/slub.c:1870 [inline]
 allocate_slab mm/slub.c:2017 [inline]
 new_slab+0x283/0x3c0 mm/slub.c:2070
 ___slab_alloc+0x979/0x1500 mm/slub.c:3223
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
 __slab_alloc_node mm/slub.c:3375 [inline]
 slab_alloc_node mm/slub.c:3468 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc_lru+0x4a1/0x6f0 mm/slub.c:3509
 alloc_inode_sb include/linux/fs.h:2937 [inline]
 reiserfs_alloc_inode+0x26/0xb0 fs/reiserfs/super.c:642
 alloc_inode+0x5d/0x220 fs/inode.c:261
 iget5_locked fs/inode.c:1271 [inline]
 iget5_locked+0x63/0xe0 fs/inode.c:1264
 reiserfs_fill_super+0x10e7/0x3160 fs/reiserfs/super.c:2053
 mount_bdev+0x1f3/0x2e0 fs/super.c:1650
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x370 fs/super.c:1771
 do_new_mount fs/namespace.c:3337 [inline]
 path_mount+0x1492/0x1ed0 fs/namespace.c:3664
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1137 [inline]
 free_unref_page_prepare+0x4fa/0xaa0 mm/page_alloc.c:2347
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2487
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:763 [inline]
 slab_alloc_node mm/slub.c:3478 [inline]
 slab_alloc mm/slub.c:3486 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
 kmem_cache_alloc+0x15d/0x2f0 mm/slub.c:3502
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 jbd2_alloc_handle include/linux/jbd2.h:1592 [inline]
 new_handle fs/jbd2/transaction.c:476 [inline]
 jbd2__journal_start+0x190/0x840 fs/jbd2/transaction.c:503
 __ext4_journal_start_sb+0x343/0x5d0 fs/ext4/ext4_jbd2.c:112
 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
 __ext4_unlink+0x418/0xcb0 fs/ext4/namei.c:3265
 ext4_unlink+0x40d/0x590 fs/ext4/namei.c:3324
 vfs_unlink+0x2f1/0x900 fs/namei.c:4318
 do_unlinkat+0x5bc/0x740 fs/namei.c:4382
 __do_sys_unlink fs/namei.c:4430 [inline]
 __se_sys_unlink fs/namei.c:4428 [inline]
 __x64_sys_unlink+0xc8/0x110 fs/namei.c:4428
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff88808219b980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808219ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88808219ba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff88808219bb00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88808219bb80: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================