syzbot

==================================================================
BUG: KASAN: double-free or invalid-free in kfree+0x19e/0x220 mm/slub.c:4574

CPU: 0 PID: 295 Comm: syz-executor113 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 kasan_report_invalid_free+0x6b/0xa0 mm/kasan/report.c:370
 __kasan_kfree_large+0x82/0x90 mm/kasan/common.c:398
 kasan_kfree_large include/linux/kasan.h:201 [inline]
 kfree_hook mm/slub.c:1687 [inline]
 free_nonslab_page+0x3c/0xc0 mm/slub.c:3551
 kfree+0x19e/0x220 mm/slub.c:4574
 kvfree+0x35/0x40 mm/util.c:658
 ext4_xattr_move_to_block fs/ext4/xattr.c:2628 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline]
 ext4_expand_extra_isize_ea+0x1063/0x1bc0 fs/ext4/xattr.c:2783
 __ext4_expand_extra_isize+0x303/0x3f0 fs/ext4/inode.c:5859
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5902 [inline]
 __ext4_mark_inode_dirty+0x4af/0x7a0 fs/ext4/inode.c:5980
 __ext4_unlink+0x8cd/0xae0 fs/ext4/namei.c:3255
 ext4_unlink+0x142/0x3f0 fs/ext4/namei.c:3298
 vfs_unlink+0x38c/0x630 fs/namei.c:4209
 do_unlinkat+0x47d/0x910 fs/namei.c:4277
 __do_sys_unlinkat fs/namei.c:4320 [inline]
 __se_sys_unlinkat fs/namei.c:4313 [inline]
 __x64_sys_unlinkat+0xcd/0xf0 fs/namei.c:4313
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7efcaeb84c19
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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:00007ffcb88bf1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007efcaeb84c19
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007efcaeb44250 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efcaeb442e0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to the page:
page:ffffea000468fd80 refcount:3 mapcount:0 mapping:ffff8881091905d8 index:0x1 pfn:0x11a3f6
memcg:ffff8881001f8000
aops:def_blk_aops ino:700000
flags: 0x400000000002202e(referenced|uptodate|dirty|active|private|mappedtodisk|zone=1)
raw: 400000000002202e 0000000000000000 dead000000000122 ffff8881091905d8
raw: 0000000000000001 ffff88811cd0e000 00000003ffffffff ffff8881001f8000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x108c48(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), pid 295, ts 24960373889, free_ts 24900720438
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2502
 prep_new_page mm/page_alloc.c:2508 [inline]
 get_page_from_freelist+0x2c14/0x2cf0 mm/page_alloc.c:4291
 __alloc_pages+0x386/0x7b0 mm/page_alloc.c:5569
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 __page_cache_alloc include/linux/pagemap.h:305 [inline]
 pagecache_get_page+0xb18/0xeb0 mm/filemap.c:1940
 find_or_create_page include/linux/pagemap.h:418 [inline]
 grow_dev_page fs/buffer.c:949 [inline]
 grow_buffers fs/buffer.c:1014 [inline]
 __getblk_slow fs/buffer.c:1041 [inline]
 __getblk_gfp+0x21e/0x7c0 fs/buffer.c:1336
 sb_getblk include/linux/buffer_head.h:361 [inline]
 __ext4_get_inode_loc+0x4ce/0xcd0 fs/ext4/inode.c:4352
 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4460 [inline]
 __ext4_iget+0x467/0x3e40 fs/ext4/inode.c:4665
 ext4_fill_super+0x7570/0x9680 fs/ext4/super.c:4829
 mount_bdev+0x281/0x3b0 fs/super.c:1378
 ext4_mount+0x34/0x40 fs/ext4/super.c:6567
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:610
 vfs_get_tree+0x88/0x290 fs/super.c:1508
 do_new_mount+0x28b/0xac0 fs/namespace.c:2994
 path_mount+0x671/0x1070 fs/namespace.c:3324
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3522
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3522
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1370 [inline]
 free_pcp_prepare mm/page_alloc.c:1442 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3441
 free_unref_page_list+0x15d/0x980 mm/page_alloc.c:3562
 release_pages+0x1310/0x1370 mm/swap.c:1009
 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:320
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
 tlb_flush_mmu mm/mmu_gather.c:247 [inline]
 tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:338
 unmap_region+0x304/0x350 mm/mmap.c:2688
 __do_munmap+0x1421/0x1a90 mm/mmap.c:2920
 __vm_munmap+0x166/0x2a0 mm/mmap.c:2943
 __do_sys_munmap mm/mmap.c:2969 [inline]
 __se_sys_munmap mm/mmap.c:2965 [inline]
 __x64_sys_munmap+0x6b/0x80 mm/mmap.c:2965
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Memory state around the buggy address:
 ffff88811a3f6480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811a3f6500: 00 00 00 00 00 00 00 00 00 00 00