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BUG: KASAN: use-after-free in jfs_readdir+0xecc/0x37bc fs/jfs/jfs_dtree.c:2869
Read of size 8 at addr ffff0000f1f91bd0 by task syz.0.153/4896

CPU: 0 PID: 4896 Comm: syz.0.153 Not tainted 6.1.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:395
 kasan_report+0xd4/0x130 mm/kasan/report.c:495
 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351
 jfs_readdir+0xecc/0x37bc fs/jfs/jfs_dtree.c:2869
 iterate_dir+0x1f4/0x4ec
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x1c4/0x4a0 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+0x58/0x168 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 4896:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x458 mm/slab.h:737
 slab_alloc_node mm/slub.c:3398 [inline]
 slab_alloc mm/slub.c:3406 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3413 [inline]
 kmem_cache_alloc+0x230/0x37c mm/slub.c:3422
 mempool_alloc_slab+0x58/0x74 mm/mempool.c:512
 mempool_alloc+0x150/0x48c mm/mempool.c:392
 alloc_metapage fs/jfs/jfs_metapage.c:176 [inline]
 __get_metapage+0x618/0x1050 fs/jfs/jfs_metapage.c:651
 dtReadFirst+0xc8/0x9bc fs/jfs/jfs_dtree.c:3058
 dtReadNext fs/jfs/jfs_dtree.c:3132 [inline]
 jfs_readdir+0x764/0x37bc fs/jfs/jfs_dtree.c:2862
 iterate_dir+0x1f4/0x4ec
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x1c4/0x4a0 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+0x58/0x168 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 4896:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:52
 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:516
 ____kasan_slab_free+0x144/0x1c0 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:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 kmem_cache_free+0x2f0/0x588 mm/slub.c:3683
 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+0x808/0xc84 fs/jfs/jfs_metapage.c:757
 dtReadNext fs/jfs/jfs_dtree.c:3174 [inline]
 jfs_readdir+0xc5c/0x37bc fs/jfs/jfs_dtree.c:2862
 iterate_dir+0x1f4/0x4ec
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x1c4/0x4a0 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+0x58/0x168 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 ffff0000f1f91ba0
 which belongs to the cache jfs_mp of size 184
The buggy address is located 48 bytes inside of
 184-byte region [ffff0000f1f91ba0, ffff0000f1f91c58)

The buggy address belongs to the physical page:
page:00000000e23dd93e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x131f91
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 0000000000000000 dead000000000122 ffff0000c6fd8480
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f1f91a80: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb
 ffff0000f1f91b00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff0000f1f91b80: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff0000f1f91c00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
 ffff0000f1f91c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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