================================================================== BUG: KASAN: use-after-free in __mutex_lock_common+0x118/0x2400 kernel/locking/mutex.c:575 Read of size 8 at addr ffff888024847860 by task syz-executor/5670 CPU: 1 PID: 5670 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 __mutex_lock_common+0x118/0x2400 kernel/locking/mutex.c:575 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_interruptible_nested+0x17/0x20 kernel/locking/mutex.c:765 ep_open+0x4a/0x260 drivers/usb/gadget/legacy/inode.c:822 do_dentry_open+0x7f7/0xf90 fs/open.c:826 do_open fs/namei.c:3659 [inline] path_openat+0x2718/0x2fb0 fs/namei.c:3793 do_filp_open+0x1df/0x400 fs/namei.c:3820 do_sys_openat2+0x14b/0x500 fs/open.c:1255 do_sys_open fs/open.c:1271 [inline] __do_sys_openat fs/open.c:1287 [inline] __se_sys_openat fs/open.c:1282 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1282 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7e6984490e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007ffd3e510368 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000555579c9d500 RCX: 00007f7e6984490e RDX: 0000000000000000 RSI: 00007ffd3e5104d0 RDI: ffffffffffffff9c RBP: 00007ffd3e5104d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3e5115c0 R13: 00007f7e6991a474 R14: 0000555579c9d4e8 R15: 0000000000000006 Allocated by task 5777: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xaf/0xe0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:607 [inline] kzalloc include/linux/slab.h:738 [inline] activate_ep_files drivers/usb/gadget/legacy/inode.c:1600 [inline] gadgetfs_bind+0x25b/0x820 drivers/usb/gadget/legacy/inode.c:1691 udc_bind_to_driver+0x203/0x5f0 drivers/usb/gadget/udc/core.c:1574 usb_gadget_probe_driver+0x1fb/0x380 drivers/usb/gadget/udc/core.c:1637 dev_config+0xe3c/0x1250 drivers/usb/gadget/legacy/inode.c:1882 vfs_write+0x304/0xd70 fs/read_write.c:592 ksys_write+0x153/0x260 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 5779: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1710 [inline] slab_free_freelist_hook+0xec/0x170 mm/slub.c:1736 slab_free mm/slub.c:3504 [inline] kfree+0xef/0x2a0 mm/slub.c:4564 destroy_ep_files+0x280/0x340 drivers/usb/gadget/legacy/inode.c:1575 gadgetfs_unbind+0x105/0x2a0 drivers/usb/gadget/legacy/inode.c:1654 usb_gadget_remove_driver+0x15c/0x350 drivers/usb/gadget/udc/core.c:1495 usb_gadget_unregister_driver+0x15d/0x4c0 drivers/usb/gadget/udc/core.c:1654 dev_release+0x82/0x1f0 drivers/usb/gadget/legacy/inode.c:1197 __fput+0x212/0x8c0 fs/file_table.c:311 task_work_run+0x125/0x1a0 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0x635/0x2100 kernel/exit.c:890 __do_sys_exit kernel/exit.c:973 [inline] __se_sys_exit kernel/exit.c:971 [inline] __x64_sys_exit+0x3c/0x40 kernel/exit.c:971 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Last potentially related work creation: kasan_save_stack+0x35/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xb8/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x105/0x7f0 kernel/rcu/tree.c:3600 drop_sysctl_table+0x359/0x4e0 fs/proc/proc_sysctl.c:1685 drop_sysctl_table+0x348/0x4e0 fs/proc/proc_sysctl.c:1688 unregister_sysctl_table+0x87/0x130 fs/proc/proc_sysctl.c:1723 __devinet_sysctl_unregister net/ipv4/devinet.c:2626 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2654 [inline] inetdev_destroy net/ipv4/devinet.c:326 [inline] inetdev_event+0x6ce/0x1350 net/ipv4/devinet.c:1611 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:391 call_netdevice_notifiers_extack net/core/dev.c:2074 [inline] call_netdevice_notifiers net/core/dev.c:2088 [inline] unregister_netdevice_many+0x109b/0x1a40 net/core/dev.c:11161 default_device_exit_batch+0x364/0x3c0 net/core/dev.c:11694 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x78e/0xba0 net/core/net_namespace.c:635 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff888024847800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 96 bytes inside of 512-byte region [ffff888024847800, ffff888024847a00) The buggy address belongs to the page: page:ffffea0000921100 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888024844800 pfn:0x24844 head:ffffea0000921100 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00008f0c08 ffffea0001f0d408 ffff888017841c80 raw: ffff888024844800 000000000010000d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 145, ts 7849174917, free_ts 0 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x24f6/0x2670 mm/page_alloc.c:4192 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x807/0xdd0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] kmem_cache_alloc_node_trace+0x120/0x2f0 mm/slub.c:3275 kmalloc_node include/linux/slab.h:625 [inline] kzalloc_node include/linux/slab.h:749 [inline] blkg_alloc+0xa9/0x640 block/blk-cgroup.c:158 blkcg_init_queue+0x26/0x430 block/blk-cgroup.c:1202 blk_alloc_queue+0x427/0x580 block/blk-core.c:582 blk_mq_init_queue_data block/blk-mq.c:3164 [inline] blk_mq_init_queue+0x33/0xd0 block/blk-mq.c:3178 scsi_alloc_sdev+0x6ee/0xb40 drivers/scsi/scsi_scan.c:319 scsi_probe_and_add_lun+0x1a3/0x3dc0 drivers/scsi/scsi_scan.c:1158 __scsi_scan_target+0x1d4/0x1050 drivers/scsi/scsi_scan.c:1639 scsi_scan_channel drivers/scsi/scsi_scan.c:1727 [inline] scsi_scan_host_selected+0x374/0x6a0 drivers/scsi/scsi_scan.c:1756 do_scsi_scan_host drivers/scsi/scsi_scan.c:1895 [inline] do_scan_async+0x10e/0x700 drivers/scsi/scsi_scan.c:1905 async_run_entry_fn+0x93/0x3e0 kernel/async.c:127 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 page_owner free stack trace missing Memory state around the buggy address: ffff888024847700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888024847780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888024847800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888024847880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888024847900: fb fb fb fb fb fb 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