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BTRFS info (device loop0 state EA): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
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BUG: KASAN: slab-use-after-free in rb_left_deepest_node lib/rbtree.c:595 [inline]
BUG: KASAN: slab-use-after-free in rb_first_postorder+0x69/0x90 lib/rbtree.c:628
Read of size 8 at addr ffff88802f9c0010 by task syz-executor252/5221

CPU: 0 UID: 0 PID: 5221 Comm: syz-executor252 Not tainted 6.11.0-syzkaller-02520-gadfc3ded5c33 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 rb_left_deepest_node lib/rbtree.c:595 [inline]
 rb_first_postorder+0x69/0x90 lib/rbtree.c:628
 btrfs_cleanup_defrag_inodes+0x2f/0x80 fs/btrfs/defrag.c:212
 close_ctree+0x2af/0xd20 fs/btrfs/disk-io.c:4256
 generic_shutdown_super+0x139/0x2d0 fs/super.c:642
 kill_anon_super+0x3b/0x70 fs/super.c:1237
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2121
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 __do_sys_exit_group kernel/exit.c:1042 [inline]
 __se_sys_exit_group kernel/exit.c:1040 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb8e92b9c9
Code: Unable to access opcode bytes at 0x7fdb8e92b99f.
RSP: 002b:00007ffd0d1f31f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fdb8e92b9c9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 00007fdb8e9ae390 R08: ffffffffffffffb8 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 00007fdb8e9ae390
R13: 0000000000000000 R14: 00007fdb8e9af100 R15: 00007fdb8e8f9980
 </TASK>

Allocated by task 5224:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3989 [inline]
 slab_alloc_node mm/slub.c:4038 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4045
 btrfs_add_inode_defrag+0x15c/0x790 fs/btrfs/defrag.c:136
 inode_should_defrag fs/btrfs/inode.c:888 [inline]
 cow_file_range+0x380/0x11f0 fs/btrfs/inode.c:1382
 btrfs_run_delalloc_range+0x33d/0xf70 fs/btrfs/inode.c:2334
 writepage_delalloc+0x482/0x7d0 fs/btrfs/extent_io.c:1192
 extent_writepage fs/btrfs/extent_io.c:1454 [inline]
 extent_write_cache_pages fs/btrfs/extent_io.c:2130 [inline]
 btrfs_writepages+0x1157/0x2370 fs/btrfs/extent_io.c:2261
 do_writepages+0x35d/0x870 mm/page-writeback.c:2683
 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 filemap_fdatawrite_range+0x120/0x180 mm/filemap.c:448
 btrfs_fdatawrite_range fs/btrfs/file.c:3799 [inline]
 start_ordered_ops fs/btrfs/file.c:1563 [inline]
 btrfs_sync_file+0x3ac/0x1230 fs/btrfs/file.c:1645
 generic_write_sync include/linux/fs.h:2870 [inline]
 btrfs_do_write_iter+0x5e0/0x760 fs/btrfs/file.c:1515
 do_iter_readv_writev+0x608/0x890
 vfs_writev+0x376/0xba0 fs/read_write.c:1064
 do_pwritev fs/read_write.c:1165 [inline]
 __do_sys_pwritev2 fs/read_write.c:1224 [inline]
 __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5224:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2250 [inline]
 slab_free mm/slub.c:4474 [inline]
 kmem_cache_free+0x145/0x350 mm/slub.c:4549
 btrfs_cleanup_defrag_inodes+0x51/0x80 fs/btrfs/defrag.c:214
 btrfs_remount_cleanup fs/btrfs/super.c:1263 [inline]
 btrfs_reconfigure+0x269c/0x2d40 fs/btrfs/super.c:1555
 reconfigure_super+0x445/0x880 fs/super.c:1083
 do_remount fs/namespace.c:3047 [inline]
 path_mount+0xc22/0xfa0 fs/namespace.c:3826
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802f9c0000
 which belongs to the cache btrfs_inode_defrag of size 56
The buggy address is located 16 bytes inside of
 freed 56-byte region [ffff88802f9c0000, ffff88802f9c0038)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2f9c0
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000000 ffff8880347843c0 dead000000000122 0000000000000000
raw: 0000000000000000 00000000802e002e 00000001fdffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5224, tgid 5224 (syz-executor252), ts 78009961193, free_ts 77412438799
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1500
 prep_new_page mm/page_alloc.c:1508 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3446
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2319
 allocate_slab+0x5a/0x2f0 mm/slub.c:2482
 new_slab mm/slub.c:2535 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3721
 __slab_alloc+0x58/0xa0 mm/slub.c:3811
 __slab_alloc_node mm/slub.c:3864 [inline]
 slab_alloc_node mm/slub.c:4026 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4045
 btrfs_add_inode_defrag+0x15c/0x790 fs/btrfs/defrag.c:136
 inode_should_defrag fs/btrfs/inode.c:888 [inline]
 cow_file_range+0x380/0x11f0 fs/btrfs/inode.c:1382
 btrfs_run_delalloc_range+0x33d/0xf70 fs/btrfs/inode.c:2334
 writepage_delalloc+0x482/0x7d0 fs/btrfs/extent_io.c:1192
 extent_writepage fs/btrfs/extent_io.c:1454 [inline]
 extent_write_cache_pages fs/btrfs/extent_io.c:2130 [inline]
 btrfs_writepages+0x1157/0x2370 fs/btrfs/extent_io.c:2261
 do_writepages+0x35d/0x870 mm/page-writeback.c:2683
 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397
 __filemap_fdatawrite_range mm/filemap.c:430 [inline]
 filemap_fdatawrite_range+0x120/0x180 mm/filemap.c:448
page last free pid 5221 tgid 5221 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1101 [inline]
 free_unref_page+0xd19/0xea0 mm/page_alloc.c:2619
 discard_slab mm/slub.c:2581 [inline]
 __put_partials+0xeb/0x130 mm/slub.c:3049
 put_cpu_partial+0x17c/0x250 mm/slub.c:3124
 __slab_free+0x2ea/0x3d0 mm/slub.c:4344
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3989 [inline]
 slab_alloc_node mm/slub.c:4038 [inline]
 __do_kmalloc_node mm/slub.c:4158 [inline]
 __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4171
 kmalloc_noprof include/linux/slab.h:694 [inline]
 tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x2b7/0x740 security/tomoyo/file.c:822
 tomoyo_sb_umount+0xd0/0x110 security/tomoyo/tomoyo.c:430
 security_sb_umount+0x6d/0xa0 security/security.c:1474
 do_umount fs/namespace.c:1842 [inline]
 path_umount+0x399/0xf70 fs/namespace.c:2013
 ksys_umount fs/namespace.c:2036 [inline]
 __do_sys_umount fs/namespace.c:2041 [inline]
 __se_sys_umount fs/namespace.c:2039 [inline]
 __x64_sys_umount+0x123/0x170 fs/namespace.c:2039
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88802f9bff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802f9bff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802f9c0000: fa fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc
                         ^
 ffff88802f9c0080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802f9c0100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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