==================================================================
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 ffff888026f8a5a5 by task syz.0.1705/13363

CPU: 1 UID: 0 PID: 13363 Comm: syz.0.1705 Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #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
 do_iter_readv_writev+0x614/0x7f0 fs/read_write.c:818
 vfs_readv+0x4cf/0x890 fs/read_write.c:1011
 do_readv+0x133/0x340 fs/read_write.c:1073
 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: 0033:0x7f68e4d85d29
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:00007f68e5bb9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007f68e4f75fa0 RCX: 00007f68e4d85d29
RDX: 0000000000000001 RSI: 0000000020000a80 RDI: 0000000000000003
RBP: 00007f68e4e01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f68e4f75fa0 R15: 00007ffd0779a9e8
 </TASK>

The buggy address belongs to the object at ffff888026f8a580
 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 [ffff888026f8a580, ffff888026f8a5a5)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26f8a
ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801ac418c0 ffffea0000c06800 dead000000000003
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 61, tgid 61 (kworker/u8:4), ts 13854844760, free_ts 13854605858
 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_noprof+0x2de/0x4f0 mm/slub.c:4310
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 lsm_blob_alloc+0x68/0x90 security/security.c:684
 lsm_task_alloc security/security.c:771 [inline]
 security_task_alloc+0x2d/0x260 security/security.c:3151
 copy_process+0x211f/0x6f20 kernel/fork.c:2376
 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
page last free pid 973 tgid 973 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:
 ffff888026f8a480: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
 ffff888026f8a500: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff888026f8a580: 00 00 00 00 05 fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888026f8a600: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888026f8a680: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
==================================================================
CPU: 0 UID: 0 PID: 13363 Comm: syz.0.1705 Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075 #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+0x3d/0x1f0 lib/dump_stack.c:120
 panic+0x71d/0x800 kernel/panic.c:354
 check_panic_on_warn+0xab/0xb0 kernel/panic.c:243
 end_report+0x117/0x180 mm/kasan/report.c:227
 kasan_report+0xe9/0x110 mm/kasan/report.c:604
 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
 do_iter_readv_writev+0x614/0x7f0 fs/read_write.c:818
 vfs_readv+0x4cf/0x890 fs/read_write.c:1011
 do_readv+0x133/0x340 fs/read_write.c:1073
 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: 0033:0x7f68e4d85d29
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:00007f68e5bb9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013
RAX: ffffffffffffffda RBX: 00007f68e4f75fa0 RCX: 00007f68e4d85d29
RDX: 0000000000000001 RSI: 0000000020000a80 RDI: 0000000000000003
RBP: 00007f68e4e01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f68e4f75fa0 R15: 00007ffd0779a9e8
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..