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BUG: KASAN: slab-use-after-free in string_nocheck lib/vsprintf.c:644 [inline]
BUG: KASAN: slab-use-after-free in string+0x1dc/0x264 lib/vsprintf.c:726
Read of size 1 at addr ffff0000c7846300 by task udevd/7552

CPU: 1 PID: 7552 Comm: udevd Not tainted 6.5.0-rc3-syzkaller-g6eaae1980760 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:475
 kasan_report+0xd8/0x138 mm/kasan/report.c:588
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 string_nocheck lib/vsprintf.c:644 [inline]
 string+0x1dc/0x264 lib/vsprintf.c:726
 vsnprintf+0xe9c/0x1a8c lib/vsprintf.c:2817
 add_uevent_var+0x190/0x3c0 lib/kobject_uevent.c:665
 dev_uevent+0x348/0x790 drivers/base/core.c:2575
 uevent_show+0x1a4/0x320 drivers/base/core.c:2646
 dev_attr_show+0x60/0xcc drivers/base/core.c:2349
 sysfs_kf_seq_show+0x2d0/0x43c fs/sysfs/file.c:59
 kernfs_seq_show+0x150/0x1fc fs/kernfs/file.c:205
 seq_read_iter+0x3e0/0xc44 fs/seq_file.c:230
 kernfs_fop_read_iter+0x144/0x5c8 fs/kernfs/file.c:279
 call_read_iter include/linux/fs.h:1865 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x5d0/0x8d4 fs/read_write.c:470
 ksys_read+0x15c/0x26c fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __arm64_sys_read+0x7c/0x90 fs/read_write.c:621
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:139
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:188
 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

Allocated by task 8453:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x7c mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 kmalloc_trace+0x70/0x88 mm/slab_common.c:1081
 kmalloc include/linux/slab.h:582 [inline]
 raw_ioctl_init drivers/usb/gadget/legacy/raw_gadget.c:460 [inline]
 raw_ioctl+0x16e4/0x33bc drivers/usb/gadget/legacy/raw_gadget.c:1250
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:139
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:188
 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

Freed by task 8452:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x7c mm/kasan/common.c:52
 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522
 ____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:162 [inline]
 slab_free_hook mm/slub.c:1792 [inline]
 slab_free_freelist_hook mm/slub.c:1818 [inline]
 slab_free mm/slub.c:3801 [inline]
 __kmem_cache_free+0x2ac/0x480 mm/slub.c:3814
 kfree+0xb8/0x19c mm/slab_common.c:1034
 dev_free drivers/usb/gadget/legacy/raw_gadget.c:210 [inline]
 kref_put+0xb8/0x6d0 include/linux/kref.h:65
 raw_release+0x12c/0x1bc drivers/usb/gadget/legacy/raw_gadget.c:424
 __fput+0x324/0x824 fs/file_table.c:384
 ____fput+0x20/0x30 fs/file_table.c:412
 task_work_run+0x230/0x2e0 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x63c/0x1f58 kernel/exit.c:874
 do_group_exit+0x194/0x22c kernel/exit.c:1024
 get_signal+0x14b0/0x159c kernel/signal.c:2877
 do_signal arch/arm64/kernel/signal.c:1249 [inline]
 do_notify_resume+0x3cc/0x3c90 arch/arm64/kernel/signal.c:1302
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline]
 el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

The buggy address belongs to the object at ffff0000c7846300
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
 freed 32-byte region [ffff0000c7846300, ffff0000c7846320)

The buggy address belongs to the physical page:
page:00000000d20114cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107846
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000200 ffff0000c0001500 fffffc0003223840 dead000000000002
raw: 0000000000000000 0000000000400040 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000c7846200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 ffff0000c7846280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
>ffff0000c7846300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
                   ^
 ffff0000c7846380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
 ffff0000c7846400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
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