loop5: detected capacity change from 0 to 32768
BTRFS: device fsid 24c7a497-3402-47dd-bef8-82358f5f30e0 devid 1 transid 8 /dev/loop5 scanned by syz-executor.5 (11808)
==================================================================
BUG: KASAN: use-after-free in btrfs_test_super+0x56/0x90 fs/btrfs/super.c:1348
Read of size 8 at addr ffff888010a6d110 by task syz-executor.5/11808

CPU: 0 PID: 11808 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x167/0x220 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
 btrfs_test_super+0x56/0x90 fs/btrfs/super.c:1348
 sget+0x102/0x3a0 fs/super.c:861
 btrfs_mount_root+0x4e8/0x770 fs/btrfs/super.c:1508
 legacy_get_tree+0xe9/0x170 fs/fs_context.c:638
 vfs_get_tree+0x7f/0x230 fs/super.c:1711
 fc_mount fs/namespace.c:1112 [inline]
 vfs_kern_mount+0x63/0xf0 fs/namespace.c:1142
 btrfs_mount+0x2fd/0xa30 fs/btrfs/super.c:1585
 legacy_get_tree+0xe9/0x170 fs/fs_context.c:638
 vfs_get_tree+0x7f/0x230 fs/super.c:1711
 do_new_mount+0x1e5/0x940 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x232/0x2c0 fs/namespace.c:3861
 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: 0033:0x7f9c6267e1ea
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:00007f9c6340eee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9c6340ef80 RCX: 00007f9c6267e1ea
RDX: 0000000020005100 RSI: 0000000020000000 RDI: 00007f9c6340ef40
RBP: 0000000020005100 R08: 00007f9c6340ef80 R09: 0000000000000080
R10: 0000000000000080 R11: 0000000000000246 R12: 0000000020000000
R13: 00007f9c6340ef40 R14: 00000000000050ef R15: 0000000020000040
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0000429b40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x4 pfn:0x10a6d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 ffffffff00000201 0000000000000000
raw: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x152dc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO), pid 11796, tgid 11795 (syz-executor.0), ts 436370330998, free_ts 437156036272
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 alloc_pages_node include/linux/gfp.h:260 [inline]
 __kmalloc_large_node+0x91/0x1d0 mm/slab_common.c:1126
 __do_kmalloc_node mm/slab_common.c:973 [inline]
 __kmalloc_node+0x116/0x230 mm/slab_common.c:992
 kmalloc_node include/linux/slab.h:602 [inline]
 kvmalloc_node+0x42/0xf0 mm/util.c:604
 kvmalloc include/linux/slab.h:720 [inline]
 kvzalloc include/linux/slab.h:728 [inline]
 btrfs_mount_root+0xf1/0x770 fs/btrfs/super.c:1466
 legacy_get_tree+0xe9/0x170 fs/fs_context.c:638
 vfs_get_tree+0x7f/0x230 fs/super.c:1711
 fc_mount fs/namespace.c:1112 [inline]
 vfs_kern_mount+0x63/0xf0 fs/namespace.c:1142
 btrfs_mount+0x2fd/0xa30 fs/btrfs/super.c:1585
 legacy_get_tree+0xe9/0x170 fs/fs_context.c:638
 vfs_get_tree+0x7f/0x230 fs/super.c:1711
 do_new_mount+0x1e5/0x940 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x232/0x2c0 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1161 [inline]
 free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2348
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2443
 free_large_kmalloc+0xff/0x190 mm/slab_common.c:962
 deactivate_locked_super+0x80/0x1c0 fs/super.c:454
 cleanup_mnt+0x358/0x3e0 fs/namespace.c:1254
 task_work_run+0x20a/0x290 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xcd/0xe0 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xa9/0x130 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff888010a6d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888010a6d080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888010a6d100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff888010a6d180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888010a6d200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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