================================================================== BUG: KASAN: double-free in dev_free drivers/usb/gadget/legacy/raw_gadget.c:225 [inline] BUG: KASAN: double-free in kref_put+0x4ab/0x7c0 include/linux/kref.h:65 Free of addr ffff888047a13f00 by task syz.1.7874/15640 CPU: 1 UID: 0 PID: 15640 Comm: syz.1.7874 Not tainted 6.11.0-rc6-syzkaller-00355-g5dadc1be8fc5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report_invalid_free+0x11a/0x140 mm/kasan/report.c:563 poison_slab_object+0xf4/0x150 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x149/0x360 mm/slub.c:4598 dev_free drivers/usb/gadget/legacy/raw_gadget.c:225 [inline] kref_put+0x4ab/0x7c0 include/linux/kref.h:65 raw_release+0x138/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:473 __fput+0x24a/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2f/0x27f0 kernel/exit.c:882 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 get_signal+0x16a1/0x1740 kernel/signal.c:2917 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 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+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa0d577cef9 Code: Unable to access opcode bytes at 0x7fa0d577cecf. RSP: 002b:00007fa0d64b00e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000000 RBX: 00007fa0d5936138 RCX: 00007fa0d577cef9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa0d593613c RBP: 00007fa0d5936130 R08: 7fffffffffffffff R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fa0d593613c R13: 0000000000000000 R14: 00007fa0d5a5f940 R15: 00007fa0d5a5fa28 Allocated by task 15638: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4162 [inline] __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4181 memdup_user+0x2b/0xc0 mm/util.c:226 raw_ioctl_ep_enable drivers/usb/gadget/legacy/raw_gadget.c:847 [inline] raw_ioctl+0xd0f/0x3cd0 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+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 15620: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x149/0x360 mm/slub.c:4598 dev_free drivers/usb/gadget/legacy/raw_gadget.c:225 [inline] kref_put+0x4ab/0x7c0 include/linux/kref.h:65 raw_release+0x138/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:473 __fput+0x24a/0x8a0 fs/file_table.c:422 __do_sys_close fs/open.c:1566 [inline] __se_sys_close fs/open.c:1551 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1551 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888047a13f00 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of 16-byte region [ffff888047a13f00, ffff888047a13f10) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47a13 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff88801ac41640 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000800080 00000001fdffffff 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 0x1d2cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 13246, tgid 13246 (syz-executor), ts 3236116461584, free_ts 3137282038634 create_dummy_stack mm/page_owner.c:94 [inline] register_dummy_stack+0x8a/0xe0 mm/page_owner.c:100 init_page_owner+0x3e/0x970 mm/page_owner.c:118 invoke_init_callbacks mm/page_ext.c:148 [inline] page_ext_init+0x731/0x790 mm/page_ext.c:497 mm_core_init+0x4c/0x60 mm/mm_init.c:2673 page last free pid 1828 tgid 1828 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1101 [inline] __free_pages_ok+0xb4e/0xcc0 mm/page_alloc.c:1221 __folio_put+0x2c8/0x440 mm/swap.c:128 folio_put include/linux/mm.h:1490 [inline] free_large_kmalloc+0x105/0x1c0 mm/slub.c:4569 kfree+0x1c4/0x360 mm/slub.c:4592 ieee80211_txq_teardown_flows+0x4a/0x220 net/mac80211/tx.c:1633 ieee80211_unregister_hw+0x65/0x2c0 net/mac80211/main.c:1671 mac80211_hwsim_del_radio+0x2c4/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5625 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6505 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd10 kernel/workqueue.c:3389 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/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: ffff888047a13e00: 00 00 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc ffff888047a13e80: fa fb fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc >ffff888047a13f00: fa fb fc fc 00 00 fc fc 00 03 fc fc 00 00 fc fc ^ ffff888047a13f80: 00 00 fc fc 00 00 fc fc 00 03 fc fc fa fb fc fc ffff888047a14000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================