==================================================================
BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:311 [inline]
BUG: KASAN: slab-use-after-free in release_metapage+0x680/0xa3c fs/jfs/jfs_metapage.c:890
Read of size 8 at addr ffff0000c8b42500 by task syz.0.24/6807

CPU: 1 UID: 0 PID: 6807 Comm: syz.0.24 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x220 mm/kasan/report.c:378
 print_report+0x68/0x84 mm/kasan/report.c:480
 kasan_report+0xb0/0x110 mm/kasan/report.c:593
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 drop_metapage fs/jfs/jfs_metapage.c:311 [inline]
 release_metapage+0x680/0xa3c fs/jfs/jfs_metapage.c:890
 write_metapage fs/jfs/jfs_metapage.h:75 [inline]
 flush_metapage fs/jfs/jfs_metapage.h:81 [inline]
 ea_write+0x4d4/0xb60 fs/jfs/xattr.c:280
 ea_put fs/jfs/xattr.c:626 [inline]
 __jfs_setxattr+0x7bc/0xf84 fs/jfs/xattr.c:792
 __jfs_xattr_set+0xe0/0x178 fs/jfs/xattr.c:941
 jfs_xattr_set+0x58/0x70 fs/jfs/xattr.c:965
 __vfs_removexattr+0x3bc/0x3e4 fs/xattr.c:518
 __vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:553
 vfs_removexattr+0x80/0x190 fs/xattr.c:575
 ovl_do_removexattr fs/overlayfs/overlayfs.h:335 [inline]
 ovl_removexattr fs/overlayfs/overlayfs.h:343 [inline]
 ovl_make_workdir fs/overlayfs/super.c:747 [inline]
 ovl_get_workdir+0xa18/0x11f4 fs/overlayfs/super.c:827
 ovl_fill_super+0x1028/0x2c80 fs/overlayfs/super.c:1406
 vfs_get_super fs/super.c:1325 [inline]
 get_tree_nodev+0xb4/0x144 fs/super.c:1344
 ovl_get_tree+0x28/0x38 fs/overlayfs/params.c:701
 vfs_get_tree+0x90/0x28c fs/super.c:1804
 do_new_mount+0x228/0x814 fs/namespace.c:3902
 path_mount+0x5b4/0xde0 fs/namespace.c:4226
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount fs/namespace.c:4427 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Allocated by task 6807:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4204
 mempool_alloc_slab+0x58/0x74 mm/mempool.c:559
 mempool_alloc_noprof+0x150/0x3f4 mm/mempool.c:402
 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline]
 __get_metapage+0x528/0xe8c fs/jfs/jfs_metapage.c:758
 ea_write+0x464/0xb60 fs/jfs/xattr.c:256
 ea_put fs/jfs/xattr.c:626 [inline]
 __jfs_setxattr+0x7bc/0xf84 fs/jfs/xattr.c:792
 __jfs_xattr_set+0xe0/0x178 fs/jfs/xattr.c:941
 jfs_xattr_set+0x58/0x70 fs/jfs/xattr.c:965
 __vfs_removexattr+0x3bc/0x3e4 fs/xattr.c:518
 __vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:553
 vfs_removexattr+0x80/0x190 fs/xattr.c:575
 ovl_do_removexattr fs/overlayfs/overlayfs.h:335 [inline]
 ovl_removexattr fs/overlayfs/overlayfs.h:343 [inline]
 ovl_make_workdir fs/overlayfs/super.c:747 [inline]
 ovl_get_workdir+0xa18/0x11f4 fs/overlayfs/super.c:827
 ovl_fill_super+0x1028/0x2c80 fs/overlayfs/super.c:1406
 vfs_get_super fs/super.c:1325 [inline]
 get_tree_nodev+0xb4/0x144 fs/super.c:1344
 ovl_get_tree+0x28/0x38 fs/overlayfs/params.c:701
 vfs_get_tree+0x90/0x28c fs/super.c:1804
 do_new_mount+0x228/0x814 fs/namespace.c:3902
 path_mount+0x5b4/0xde0 fs/namespace.c:4226
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount fs/namespace.c:4427 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Freed by task 6810:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x68/0x88 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x184/0x550 mm/slub.c:4745
 mempool_free_slab+0x28/0x38 mm/mempool.c:566
 mempool_free+0xbc/0x2e8 mm/mempool.c:548
 free_metapage fs/jfs/jfs_metapage.c:279 [inline]
 metapage_release_folio+0x374/0x48c fs/jfs/jfs_metapage.c:634
 metapage_invalidate_folio+0x14c/0x1cc fs/jfs/jfs_metapage.c:669
 folio_invalidate mm/truncate.c:140 [inline]
 truncate_cleanup_folio+0x264/0x3a0 mm/truncate.c:160
 truncate_inode_folio mm/truncate.c:175 [inline]
 truncate_inode_pages_range+0xab8/0xe18 mm/truncate.c:436
 truncate_inode_pages+0x2c/0x3c mm/truncate.c:460
 jfs_reconfigure+0x474/0x824 fs/jfs/super.c:406
 reconfigure_super+0x1d4/0x6f0 fs/super.c:1077
 do_remount fs/namespace.c:3386 [inline]
 path_mount+0xb34/0xde0 fs/namespace.c:4218
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount fs/namespace.c:4427 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4427
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

The buggy address belongs to the object at ffff0000c8b424d8
 which belongs to the cache jfs_mp of size 184
The buggy address is located 40 bytes inside of
 freed 184-byte region [ffff0000c8b424d8, ffff0000c8b42590)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x108b42
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000000 ffff0000c4a193c0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000c8b42400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000c8b42480: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb
>ffff0000c8b42500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff0000c8b42580: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000c8b42600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
read_mapping_page failed!
ERROR: (device loop0): txAbort: 

ERROR: (device loop0): remounting filesystem as read-only
read_mapping_page failed!
ERROR: (device loop0): txAbort: 

overlayfs: failed to set uuid (/file0, err=-5); falling back to uuid=null.