loop6: detected capacity change from 0 to 32768
netlink: 8 bytes leftover after parsing attributes in process `syz.6.224'.
==================================================================
BUG: KASAN: use-after-free in jfs_readdir+0xed0/0x3148 fs/jfs/jfs_dtree.c:2870
Read of size 8 at addr ffff0000ca1d2220 by task syz.6.224/6640

CPU: 1 PID: 6640 Comm: syz.6.224 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351
 jfs_readdir+0xed0/0x3148 fs/jfs/jfs_dtree.c:2870
 iterate_dir+0x1f0/0x4cc fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x11c/0x318 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Allocated by task 6640:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x43c mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x234/0x318 mm/slub.c:3383
 mempool_alloc_slab+0x58/0x74 mm/mempool.c:512
 mempool_alloc+0x150/0x3f4 mm/mempool.c:392
 alloc_metapage fs/jfs/jfs_metapage.c:176 [inline]
 __get_metapage+0x5c4/0xfcc fs/jfs/jfs_metapage.c:651
 dtReadFirst+0xcc/0x78c fs/jfs/jfs_dtree.c:3067
 dtReadNext fs/jfs/jfs_dtree.c:3148 [inline]
 jfs_readdir+0x740/0x3148 fs/jfs/jfs_dtree.c:2863
 iterate_dir+0x1f0/0x4cc fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x11c/0x318 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Freed by task 6640:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_free_info+0x3c/0x60 mm/kasan/generic.c:516
 ____kasan_slab_free+0x148/0x1b0 mm/kasan/common.c:236
 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x16c/0x1ec mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 kmem_cache_free+0x11c/0x324 mm/slub.c:3709
 mempool_free_slab+0x28/0x38 mm/mempool.c:519
 mempool_free+0xbc/0x2e0 mm/mempool.c:501
 free_metapage fs/jfs/jfs_metapage.c:191 [inline]
 drop_metapage fs/jfs/jfs_metapage.c:228 [inline]
 release_metapage+0x814/0xc90 fs/jfs/jfs_metapage.c:757
 dtReadNext fs/jfs/jfs_dtree.c:3190 [inline]
 jfs_readdir+0xc64/0x3148 fs/jfs/jfs_dtree.c:2863
 iterate_dir+0x1f0/0x4cc fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x11c/0x318 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the object at ffff0000ca1d21f0
 which belongs to the cache jfs_mp of size 184
The buggy address is located 48 bytes inside of
 184-byte region [ffff0000ca1d21f0, ffff0000ca1d22a8)

The buggy address belongs to the physical page:
page:00000000f9c3a7b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10a1d2
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 0000000000000000 dead000000000122 ffff0000c4b51380
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ca1d2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ca1d2180: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb
>ffff0000ca1d2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff0000ca1d2280: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
 ffff0000ca1d2300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================