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BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:229 [inline]
BUG: KASAN: slab-use-after-free in release_metapage+0x760/0xac0 fs/jfs/jfs_metapage.c:784
Read of size 8 at addr ffff8880293266f0 by task syz.2.3/5914

CPU: 1 UID: 0 PID: 5914 Comm: syz.2.3 Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0xb4/0x290 mm/kasan/report.c:521
 kasan_report+0x118/0x150 mm/kasan/report.c:634
 drop_metapage fs/jfs/jfs_metapage.c:229 [inline]
 release_metapage+0x760/0xac0 fs/jfs/jfs_metapage.c:784
 write_metapage fs/jfs/jfs_metapage.h:75 [inline]
 flush_metapage fs/jfs/jfs_metapage.h:81 [inline]
 ea_put fs/jfs/xattr.c:623 [inline]
 __jfs_setxattr+0xa6e/0x1120 fs/jfs/xattr.c:792
 jfs_initxattrs+0x18c/0x260 fs/jfs/xattr.c:1040
 security_inode_init_security+0x29d/0x3f0 security/security.c:1852
 jfs_init_security+0x91/0xe0 fs/jfs/xattr.c:1052
 jfs_mkdir+0x28d/0xa70 fs/jfs/namei.c:240
 vfs_mkdir+0x303/0x510 fs/namei.c:4359
 do_mkdirat+0x247/0x590 fs/namei.c:4392
 __do_sys_mkdirat fs/namei.c:4409 [inline]
 __se_sys_mkdirat fs/namei.c:4407 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4407
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65cc38d1d7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f65cd294e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f65cd294ef0 RCX: 00007f65cc38d1d7
RDX: 00000000000001ff RSI: 0000200000000240 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000240
R13: 00007f65cd294eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 5914:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4147 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4203
 mempool_alloc_noprof+0x1a7/0x510 mm/mempool.c:402
 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline]
 __get_metapage+0x50f/0xdc0 fs/jfs/jfs_metapage.c:652
 ea_get+0xb8e/0x1330 fs/jfs/xattr.c:528
 __jfs_setxattr+0x57c/0x1120 fs/jfs/xattr.c:727
 jfs_initxattrs+0x18c/0x260 fs/jfs/xattr.c:1040
 security_inode_init_security+0x29d/0x3f0 security/security.c:1852
 jfs_init_security+0x91/0xe0 fs/jfs/xattr.c:1052
 jfs_mkdir+0x28d/0xa70 fs/jfs/namei.c:240
 vfs_mkdir+0x303/0x510 fs/namei.c:4359
 do_mkdirat+0x247/0x590 fs/namei.c:4392
 __do_sys_mkdirat fs/namei.c:4409 [inline]
 __se_sys_mkdirat fs/namei.c:4407 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4407
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5907:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2380 [inline]
 slab_free mm/slub.c:4642 [inline]
 kmem_cache_free+0x192/0x3f0 mm/slub.c:4744
 free_metapage fs/jfs/jfs_metapage.c:197 [inline]
 metapage_release_folio+0x40e/0x540 fs/jfs/jfs_metapage.c:552
 folio_invalidate mm/truncate.c:140 [inline]
 truncate_cleanup_folio+0x2d8/0x430 mm/truncate.c:160
 truncate_inode_folio mm/truncate.c:175 [inline]
 truncate_inode_pages_range+0xb1c/0xda0 mm/truncate.c:432
 jfs_reconfigure+0x5ac/0xa00 fs/jfs/super.c:406
 reconfigure_super+0x224/0x890 fs/super.c:1083
 do_remount fs/namespace.c:3365 [inline]
 path_mount+0xd18/0xfe0 fs/namespace.c:4200
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4409
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880293266c8
 which belongs to the cache jfs_mp of size 184
The buggy address is located 40 bytes inside of
 freed 184-byte region [ffff8880293266c8, ffff888029326780)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29326
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801d3ac640 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 00000000f5000000 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 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5914, tgid 5906 (syz.2.3), ts 98306234366, free_ts 98218410608
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718
 prep_new_page mm/page_alloc.c:1726 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3688
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2450 [inline]
 allocate_slab+0x8a/0x3b0 mm/slub.c:2618
 new_slab mm/slub.c:2672 [inline]
 ___slab_alloc+0xbfc/0x1480 mm/slub.c:3858
 __slab_alloc mm/slub.c:3948 [inline]
 __slab_alloc_node mm/slub.c:4023 [inline]
 slab_alloc_node mm/slub.c:4184 [inline]
 kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4203
 mempool_alloc_noprof+0x1a7/0x510 mm/mempool.c:402
 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline]
 __get_metapage+0x50f/0xdc0 fs/jfs/jfs_metapage.c:652
 diWriteSpecial+0x1b4/0x460 fs/jfs/jfs_imap.c:518
 diSync+0x69d/0x8d0 fs/jfs/jfs_imap.c:251
 diNewIAG fs/jfs/jfs_imap.c:2610 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x17e6/0x1df0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1d5/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x8f0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x193/0xa70 fs/jfs/namei.c:225
 vfs_mkdir+0x303/0x510 fs/namei.c:4359
page last free pid 15 tgid 15 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2725
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca8/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968
 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:164
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff888029326580: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00
 ffff888029326600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888029326680: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb
                                                             ^
 ffff888029326700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888029326780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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