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BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0xf86/0x1070 fs/hfsplus/wrapper.c:226
Read of size 2 at addr ffff888024122c00 by task syz-executor365/5187

CPU: 0 PID: 5187 Comm: syz-executor365 Not tainted 6.9.0-rc3-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 hfsplus_read_wrapper+0xf86/0x1070 fs/hfsplus/wrapper.c:226
 hfsplus_fill_super+0x352/0x1bc0 fs/hfsplus/super.c:419
 mount_bdev+0x1e3/0x2d0 fs/super.c:1658
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1779
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x297/0x320 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7fcf37a4e14a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 3e 07 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffcc22e858 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fffcc22e870 RCX: 00007fcf37a4e14a
RDX: 0000000020000500 RSI: 0000000020000080 RDI: 00007fffcc22e870
RBP: 0000000000000004 R08: 00007fffcc22e8b0 R09: 0000000000000614
R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000
R13: 00007fffcc22e8b0 R14: 0000000000000003 R15: 0000000000080000
 </TASK>

The buggy address belongs to the object at ffff888024122c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes inside of
 freed 512-byte region [ffff888024122c00, ffff888024122e00)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24120
head: order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000840 ffff888015042c80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
head: 00fff80000000840 ffff888015042c80 dead000000000100 dead000000000122
head: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
head: 00fff80000000002 ffffea0000904801 ffffea0000904848 00000000ffffffff
head: 0000000400000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 18372511785, free_ts 17871615388
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
 prep_new_page mm/page_alloc.c:1541 [inline]
 get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page mm/slub.c:2175 [inline]
 allocate_slab mm/slub.c:2338 [inline]
 new_slab+0xcc/0x3a0 mm/slub.c:2391
 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610
 __slab_alloc_node mm/slub.c:3663 [inline]
 slab_alloc_node mm/slub.c:3835 [inline]
 kmalloc_trace+0x2fb/0x330 mm/slub.c:3992
 kmalloc include/linux/slab.h:628 [inline]
 kzalloc include/linux/slab.h:749 [inline]
 zs_create_pool+0x39b/0x9e0 mm/zsmalloc.c:2171
 zpool_create_pool+0x106/0x330 mm/zpool.c:174
 zswap_pool_create+0x218/0x7b0 mm/zswap.c:340
 __zswap_pool_create_fallback mm/zswap.c:424 [inline]
 zswap_setup+0x3cb/0x7e0 mm/zswap.c:1821
 zswap_init+0x2c/0x40 mm/zswap.c:1856
 do_one_initcall+0x128/0x700 init/main.c:1238
 do_initcall_level init/main.c:1300 [inline]
 do_initcalls init/main.c:1316 [inline]
 do_basic_setup init/main.c:1335 [inline]
 kernel_init_freeable+0x69d/0xca0 init/main.c:1548
 kernel_init+0x1c/0x2b0 init/main.c:1437
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
page last free pid 1 tgid 1 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1141 [inline]
 free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3798 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 __do_kmalloc_node mm/slub.c:3965 [inline]
 __kmalloc_node+0x1e9/0x480 mm/slub.c:3973
 kmalloc_node include/linux/slab.h:648 [inline]
 __alloc+0x13a/0x190 kernel/bpf/memalloc.c:153
 alloc_bulk+0x3e1/0x600 kernel/bpf/memalloc.c:247
 prefill_mem_cache kernel/bpf/memalloc.c:503 [inline]
 bpf_mem_alloc_init+0x378/0xd00 kernel/bpf/memalloc.c:573
 bpf_global_ma_init+0x1a/0x40 kernel/bpf/core.c:3005
 do_one_initcall+0x128/0x700 init/main.c:1238
 do_initcall_level init/main.c:1300 [inline]
 do_initcalls init/main.c:1316 [inline]
 do_basic_setup init/main.c:1335 [inline]
 kernel_init_freeable+0x69d/0xca0 init/main.c:1548
 kernel_init+0x1c/0x2b0 init/main.c:1437
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

Memory state around the buggy address:
 ffff888024122b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888024122b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888024122c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888024122c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888024122d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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