================================================================== BUG: KASAN: double-free in dev_free+0x446/0x700 drivers/usb/gadget/legacy/raw_gadget.c:225 Free of addr ffff888137a922c0 by task syz.7.6722/3262 CPU: 0 UID: 0 PID: 3262 Comm: syz.7.6722 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: 0033:0x7f33c9c90805 Code: Unable to access opcode bytes at 0x7f33c9c907db. RSP: 002b:00007f33c88d0fa0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 0000000000000000 RCX: 00007f33c9c90805 RDX: 00007f33c88d0fe0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f33c9cd132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f33c9e15f80 R15: 00007ffd83f73318 Allocated by task 3263: 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 3262: 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 ffff888137a922c0 which belongs to the cache kmalloc-16 of size 16 The buggy address is located 0 bytes inside of 16-byte region [ffff888137a922c0, ffff888137a922d0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x137a92 flags: 0x200000000000000(node=0|zone=2) page_type: f5(slab) raw: 0200000000000000 ffff888100041640 ffffea000412b7c0 dead000000000002 raw: 0000000000000000 0000000000800080 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 8622, tgid 8622 (kworker/0:1), ts 1172934870019, free_ts 1172911556102 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] __kmalloc_cache_noprof+0x27a/0x2c0 mm/slub.c:4290 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] ath9k_hif_usb_alloc_reg_in_urbs drivers/net/wireless/ath/ath9k/hif_usb.c:975 [inline] ath9k_hif_usb_alloc_urbs+0xb5b/0x1020 drivers/net/wireless/ath/ath9k/hif_usb.c:1048 ath9k_hif_usb_dev_init drivers/net/wireless/ath/ath9k/hif_usb.c:1134 [inline] ath9k_hif_usb_firmware_cb+0x146/0x620 drivers/net/wireless/ath/ath9k/hif_usb.c:1267 request_firmware_work_func+0x13a/0x250 drivers/base/firmware_loader/main.c:1197 process_one_work+0x9c5/0x1ba0 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 page last free pid 5246 tgid 5246 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 selinux_genfs_get_sid security/selinux/hooks.c:1348 [inline] inode_doinit_with_dentry+0xac4/0x12c0 security/selinux/hooks.c:1546 selinux_d_instantiate+0x26/0x30 security/selinux/hooks.c:6331 security_d_instantiate+0x58/0xc0 security/security.c:4063 d_splice_alias+0x94/0xdf0 fs/dcache.c:2989 kernfs_iop_lookup+0x286/0x330 fs/kernfs/dir.c:1229 __lookup_slow+0x24f/0x460 fs/namei.c:1732 lookup_slow fs/namei.c:1749 [inline] walk_component+0x350/0x5b0 fs/namei.c:2053 lookup_last fs/namei.c:2556 [inline] path_lookupat+0x17f/0x770 fs/namei.c:2580 filename_lookup+0x1e5/0x5b0 fs/namei.c:2609 vfs_statx+0x11e/0x1e0 fs/stat.c:312 vfs_fstatat+0x9f/0x160 fs/stat.c:341 __do_sys_newfstatat+0xa2/0x130 fs/stat.c:505 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 Memory state around the buggy address: ffff888137a92180: fa fb fc fc fa fb fc fc fa fb fc fc 00 01 fc fc ffff888137a92200: fa fb fc fc fa fb fc fc 00 00 fc fc 00 05 fc fc >ffff888137a92280: fa fb fc fc 00 06 fc fc fa fb fc fc 00 06 fc fc ^ ffff888137a92300: fa fb fc fc fa fb fc fc 00 01 fc fc fa fb fc fc ffff888137a92380: 00 01 fc fc 00 00 fc fc fa fb fc fc 00 00 fc fc 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