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BUG: KASAN: slab-out-of-bounds in string_nocheck lib/vsprintf.c:646 [inline]
BUG: KASAN: slab-out-of-bounds in string+0x398/0x3d0 lib/vsprintf.c:728
Read of size 1 at addr ffff888025e15a25 by task syz.2.652/8136

CPU: 1 UID: 0 PID: 8136 Comm: syz.2.652 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:489
 kasan_report+0xd9/0x110 mm/kasan/report.c:602
 string_nocheck lib/vsprintf.c:646 [inline]
 string+0x398/0x3d0 lib/vsprintf.c:728
 vsnprintf+0xc67/0x1870 lib/vsprintf.c:2848
 snprintf+0xc8/0x100 lib/vsprintf.c:2983
 nvmet_root_discovery_nqn_show+0x69/0x90 drivers/nvme/target/configfs.c:2250
 fill_read_buffer fs/configfs/file.c:68 [inline]
 configfs_read_iter+0x40d/0x690 fs/configfs/file.c:88
 __kernel_read+0x3f1/0xb50 fs/read_write.c:523
 integrity_kernel_read+0x7f/0xb0 security/integrity/iint.c:28
 ima_calc_file_hash_tfm+0x2c9/0x3e0 security/integrity/ima/ima_crypto.c:480
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0x1ba/0x490 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x8a7/0xa10 security/integrity/ima/ima_api.c:293
 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372
 ima_file_check+0xc6/0x110 security/integrity/ima/ima_main.c:572
 security_file_post_open+0x8e/0x210 security/security.c:3121
 do_open fs/namei.c:3830 [inline]
 path_openat+0x1419/0x2d60 fs/namei.c:3987
 do_filp_open+0x20c/0x470 fs/namei.c:4014
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_openat fs/open.c:1433 [inline]
 __se_sys_openat fs/open.c:1428 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1428
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f42fa185d29
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:00007f42faf0f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f42fa375fa0 RCX: 00007f42fa185d29
RDX: 0000000000189002 RSI: 0000000020000100 RDI: ffffffffffffff9c
RBP: 00007f42fa201aa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f42fa375fa0 R15: 00007fff6aa3b7d8
 </TASK>

The buggy address belongs to the object at ffff888025e15a00
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes to the right of
 allocated 37-byte region [ffff888025e15a00, ffff888025e15a25)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25e15
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801ac418c0 ffffea0000bce2c0 dead000000000005
raw: 0000000000000000 0000000000200020 00000001f5000000 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 12, tgid 12 (kworker/u8:1), ts 13646323081, free_ts 13559727652
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
 prep_new_page mm/page_alloc.c:1566 [inline]
 get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753
 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
 alloc_slab_page mm/slub.c:2423 [inline]
 allocate_slab mm/slub.c:2589 [inline]
 new_slab+0x2c9/0x410 mm/slub.c:2642
 ___slab_alloc+0xce2/0x1650 mm/slub.c:3830
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920
 __slab_alloc_node mm/slub.c:3995 [inline]
 slab_alloc_node mm/slub.c:4156 [inline]
 __do_kmalloc_node mm/slub.c:4297 [inline]
 __kmalloc_node_noprof+0x2f0/0x520 mm/slub.c:4304
 kmalloc_node_noprof include/linux/slab.h:928 [inline]
 __vmalloc_area_node mm/vmalloc.c:3647 [inline]
 __vmalloc_node_range_noprof+0x3d8/0x1530 mm/vmalloc.c:3846
 alloc_thread_stack_node kernel/fork.c:314 [inline]
 dup_task_struct kernel/fork.c:1116 [inline]
 copy_process+0x29b3/0x6f20 kernel/fork.c:2224
 kernel_clone+0xfd/0x960 kernel/fork.c:2806
 user_mode_thread+0xb4/0xf0 kernel/fork.c:2884
 call_usermodehelper_exec_work kernel/umh.c:171 [inline]
 call_usermodehelper_exec_work+0xcb/0x170 kernel/umh.c:157
 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
page last free pid 46 tgid 46 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0x661/0x1080 mm/page_alloc.c:2659
 vfree+0x174/0x950 mm/vmalloc.c:3383
 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3303
 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff888025e15900: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
 ffff888025e15980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
>ffff888025e15a00: 00 00 00 00 05 fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888025e15a80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
 ffff888025e15b00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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