================================================================== BUG: KASAN: double-free in dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225 Free of addr ffff8881057bcda0 by task syz.4.371/6594 CPU: 0 UID: 0 PID: 6594 Comm: syz.4.371 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: __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: 0033:0x7f84e594d3aa Code: Unable to access opcode bytes at 0x7f84e594d380. RSP: 002b:00007f84e45c0ff0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f84e5b05f80 RCX: 00007f84e594d3aa RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f84e59c132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f84e5b05f80 R15: 00007ffd8f91b4f8 Allocated by task 6605: 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 6594: 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 ffff8881057bcda0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of 16-byte region [ffff8881057bcda0, ffff8881057bcdb0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1057bc anon flags: 0x200000000000000(node=0|zone=2) page_type: f5(slab) raw: 0200000000000000 ffff888100041640 0000000000000000 dead000000000001 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 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 7188712874, free_ts 0 create_dummy_stack mm/page_owner.c:94 [inline] register_dummy_stack+0x8a/0xd0 mm/page_owner.c:100 init_page_owner+0x48/0xbd0 mm/page_owner.c:118 invoke_init_callbacks mm/page_ext.c:148 [inline] page_ext_init+0x725/0xbf0 mm/page_ext.c:497 mm_core_init+0x202/0x240 mm/mm_init.c:2667 page_owner free stack trace missing Memory state around the buggy address: ffff8881057bcc80: fa fb fc fc 00 00 fc fc fa fb fc fc 00 00 fc fc ffff8881057bcd00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc >ffff8881057bcd80: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc ^ ffff8881057bce00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc ffff8881057bce80: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc ==================================================================