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BUG: KASAN: double-free in dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225
Free of addr ffff88811cdbb720 by task syz.6.3100/18181

CPU: 0 UID: 0 PID: 18181 Comm: syz.6.3100 Not tainted 6.12.0-rc4-syzkaller-00059-gc67e9601e29a #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:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report_invalid_free+0xaa/0xd0 mm/kasan/report.c:563
 check_slab_allocation+0xfd/0x130 mm/kasan/common.c:225
 kasan_slab_pre_free include/linux/kasan.h:195 [inline]
 slab_free_hook mm/slub.c:2287 [inline]
 slab_free mm/slub.c:4579 [inline]
 kfree+0xff/0x480 mm/slub.c:4727
 dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225
 kref_put include/linux/kref.h:65 [inline]
 raw_release+0x168/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:473
 __fput+0x3f6/0xb60 fs/file_table.c:431
 task_work_run+0x14e/0x250 kernel/task_work.c:239
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xadd/0x2ce0 kernel/exit.c:939
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
 get_signal+0x25fb/0x2770 kernel/signal.c:2917
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f286662e31b
Code: Unable to access opcode bytes at 0x7f286662e2f1.
RSP: 002b:00007f28652a4f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff0 RBX: 0000000000000004 RCX: 00007f286662e31b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 00007f28652a5fe0 R08: 0000000000000000 R09: 00362e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f28652a4fb0 R14: 0000000020000000 R15: 00007f2866910b88
 </TASK>

Allocated by task 18186:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:257 [inline]
 __do_kmalloc_node mm/slub.c:4264 [inline]
 __kmalloc_node_track_caller_noprof+0x1ff/0x3e0 mm/slub.c:4283
 memdup_user+0x2a/0xd0 mm/util.c:226
 raw_ioctl_ep_enable drivers/usb/gadget/legacy/raw_gadget.c:847 [inline]
 raw_ioctl+0xbc4/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1318
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
 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

Freed by task 18185:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x37/0x50 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:2342 [inline]
 slab_free mm/slub.c:4579 [inline]
 kfree+0x130/0x480 mm/slub.c:4727
 dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225
 kref_put include/linux/kref.h:65 [inline]
 raw_release+0x168/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:473
 __fput+0x3f6/0xb60 fs/file_table.c:431
 __fput_sync+0x45/0x50 fs/file_table.c:516
 __do_sys_close fs/open.c:1565 [inline]
 __se_sys_close fs/open.c:1550 [inline]
 __x64_sys_close+0x86/0x100 fs/open.c:1550
 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

The buggy address belongs to the object at ffff88811cdbb720
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 0 bytes inside of
 16-byte region [ffff88811cdbb720, ffff88811cdbb730)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11cdbb
flags: 0x200000000000000(node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000000 ffff888100041640 ffffea00046f7c80 dead000000000002
raw: 0000000000000000 0000000080800080 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 36, tgid 36 (kworker/1:1), ts 97905199682, free_ts 97880281169
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0xd5c/0x2630 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x221/0x2270 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0xeb/0x400 mm/mempolicy.c:2265
 alloc_slab_page mm/slub.c:2412 [inline]
 allocate_slab mm/slub.c:2578 [inline]
 new_slab+0x2ba/0x3f0 mm/slub.c:2631
 ___slab_alloc+0xd45/0x1760 mm/slub.c:3818
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 __do_kmalloc_node mm/slub.c:4263 [inline]
 __kmalloc_node_track_caller_noprof+0x14e/0x3e0 mm/slub.c:4283
 kvasprintf+0xbd/0x160 lib/kasprintf.c:25
 kasprintf+0xc8/0x100 lib/kasprintf.c:59
 device_get_devnode+0xb2/0x2c0 drivers/base/core.c:3959
 dev_uevent+0x513/0x8f0 drivers/base/core.c:2650
 kobject_uevent_env+0x656/0x1860 lib/kobject_uevent.c:573
 driver_bound+0x164/0x230 drivers/base/dd.c:421
 really_probe+0x62b/0xa90 drivers/base/dd.c:708
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800
page last free pid 23 tgid 23 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0x58a/0xb50 mm/page_alloc.c:2638
 rcu_do_batch kernel/rcu/tree.c:2567 [inline]
 rcu_core+0x79d/0x14d0 kernel/rcu/tree.c:2823
 handle_softirqs+0x206/0x8d0 kernel/softirq.c:554
 run_ksoftirqd kernel/softirq.c:927 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:919
 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164
 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:
 ffff88811cdbb600: 00 00 fc fc fa fb fc fc 00 06 fc fc 00 00 fc fc
 ffff88811cdbb680: 00 00 fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
>ffff88811cdbb700: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
                               ^
 ffff88811cdbb780: fa fb fc fc 00 03 fc fc 00 05 fc fc 00 01 fc fc
 ffff88811cdbb800: fa fb fc fc 00 06 fc fc 00 00 fc fc 00 00 fc fc
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