loop0: detected capacity change from 0 to 164
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BUG: KASAN: slab-out-of-bounds in isofs_fh_to_parent+0x1cc/0x230 fs/isofs/export.c:183
Read of size 4 at addr ffff8880003514d4 by task syz.0.0/5320

CPU: 0 UID: 0 PID: 5320 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-10514-g7f2ff7b62617 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16e/0x5b0 mm/kasan/report.c:521
 kasan_report+0x143/0x180 mm/kasan/report.c:634
 isofs_fh_to_parent+0x1cc/0x230 fs/isofs/export.c:183
 exportfs_decode_fh_raw+0x3bf/0x770 fs/exportfs/expfs.c:521
 do_handle_to_path+0xba/0x1b0 fs/fhandle.c:257
 handle_to_path fs/fhandle.c:385 [inline]
 do_handle_open+0x886/0xb40 fs/fhandle.c:403
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0014b8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f00159b5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f0014da5fa0 RCX: 00007f0014b8d169
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000004
RBP: 00007f0014c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0014da5fa0 R15: 00007ffe537f7728
 </TASK>

Allocated by task 5320:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x9d/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4318 [inline]
 __kmalloc_noprof+0x28e/0x4d0 mm/slub.c:4330
 kmalloc_noprof include/linux/slab.h:906 [inline]
 handle_to_path fs/fhandle.c:357 [inline]
 do_handle_open+0x51f/0xb40 fs/fhandle.c:403
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880003514c0
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes to the right of
 allocated 20-byte region [ffff8880003514c0, ffff8880003514d4)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x351
ksm flags: 0x7ff00000000000(node=0|zone=0|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 007ff00000000000 ffff88801b041780 ffffea000001b240 dead000000000003
raw: 0000000000000000 0000000080400040 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 0x52800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP), pid 352, tgid 352 (kworker/u4:0), ts 8042268045, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3695/0x37e0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x2c5/0x7b0 mm/page_alloc.c:4740
 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2446 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2610
 new_slab mm/slub.c:2663 [inline]
 ___slab_alloc+0xc3b/0x1500 mm/slub.c:3849
 __slab_alloc+0x58/0xa0 mm/slub.c:3939
 __slab_alloc_node mm/slub.c:4014 [inline]
 slab_alloc_node mm/slub.c:4175 [inline]
 __kmalloc_cache_noprof+0x26a/0x370 mm/slub.c:4344
 kmalloc_noprof include/linux/slab.h:902 [inline]
 slab_free_hook mm/slub.c:2328 [inline]
 slab_free mm/slub.c:4633 [inline]
 kmem_cache_free+0x16e/0x410 mm/slub.c:4735
 __exit_signal kernel/exit.c:212 [inline]
 release_task+0x10d6/0x17c0 kernel/exit.c:260
 exit_notify kernel/exit.c:791 [inline]
 do_exit+0x1ae2/0x2950 kernel/exit.c:974
 call_usermodehelper_exec_async+0x37a/0x380 kernel/umh.c:122
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888000351380: 00 00 00 02 fc fc fc fc 00 00 05 fc fc fc fc fc
 ffff888000351400: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc
>ffff888000351480: 00 00 00 fc fc fc fc fc 00 00 04 fc fc fc fc fc
                                                 ^
 ffff888000351500: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc
 ffff888000351580: 00 00 05 fc fc fc fc fc 00 00 00 00 fc fc fc fc
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