oom_control is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality. udc dummy_udc.0: failed to start USB Gadget filesystem: -12 gadgetfs gadget.0: probe with driver gadgetfs failed with error -12 udc dummy_udc.1: failed to start USB Gadget filesystem: -12 gadgetfs gadget.1: probe with driver gadgetfs failed with error -12 ================================================================== BUG: KASAN: slab-use-after-free in gadgetfs_bind+0xd8/0xad0 drivers/usb/gadget/legacy/inode.c:1692 Write of size 8 at addr ffff88802a71f8c0 by task syz.0.1420/9692 CPU: 0 UID: 0 PID: 9692 Comm: syz.0.1420 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 gadgetfs_bind+0xd8/0xad0 drivers/usb/gadget/legacy/inode.c:1692 gadget_bind_driver+0x2ca/0x9e0 drivers/usb/gadget/udc/core.c:1662 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __driver_attach+0x339/0x600 drivers/base/dd.c:1292 bus_for_each_dev+0x23b/0x2c0 drivers/base/bus.c:383 bus_add_driver+0x345/0x670 drivers/base/bus.c:763 driver_register+0x23a/0x320 drivers/base/driver.c:174 usb_gadget_register_driver_owner+0xf9/0x270 drivers/usb/gadget/udc/core.c:1752 dev_config+0xe3c/0x12a0 drivers/usb/gadget/legacy/inode.c:1893 vfs_write+0x296/0xba0 fs/read_write.c:685 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f721b99e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f721c918028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f721bc25fa0 RCX: 00007f721b99e159 RDX: 000000000000001f RSI: 0000200000000400 RDI: 0000000000000008 RBP: 00007f721ba3503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f721bc26038 R14: 00007f721bc25fa0 R15: 00007ffc34d1dcd8 Allocated by task 5620: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x31c/0x600 mm/slub.c:5599 _kmalloc_noprof include/linux/slab.h:991 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] dev_new drivers/usb/gadget/legacy/inode.c:176 [inline] gadgetfs_fill_super+0x27b/0x790 drivers/usb/gadget/legacy/inode.c:2064 vfs_get_super fs/super.c:1391 [inline] get_tree_single+0xc0/0x150 fs/super.c:1418 vfs_get_tree+0x92/0x2a0 fs/super.c:1933 fc_mount fs/namespace.c:1198 [inline] do_new_mount_fc fs/namespace.c:3772 [inline] do_new_mount+0x319/0xdc0 fs/namespace.c:3848 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4396 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4373 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 9692: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2779 [inline] slab_free mm/slub.c:6544 [inline] kfree+0x1c5/0x650 mm/slub.c:6837 gadgetfs_bind+0x93c/0xad0 drivers/usb/gadget/legacy/inode.c:1713 gadget_bind_driver+0x2ca/0x9e0 drivers/usb/gadget/udc/core.c:1662 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898 __driver_attach+0x339/0x600 drivers/base/dd.c:1292 bus_for_each_dev+0x23b/0x2c0 drivers/base/bus.c:383 bus_add_driver+0x345/0x670 drivers/base/bus.c:763 driver_register+0x23a/0x320 drivers/base/driver.c:174 usb_gadget_register_driver_owner+0xf9/0x270 drivers/usb/gadget/udc/core.c:1752 dev_config+0xe3c/0x12a0 drivers/usb/gadget/legacy/inode.c:1893 vfs_write+0x296/0xba0 fs/read_write.c:685 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802a71f800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 192 bytes inside of freed 1024-byte region [ffff88802a71f800, ffff88802a71fc00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802a71d800 pfn:0x2a718 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000240 ffff88801b041dc0 ffffea0000a7f010 ffffea0000ca6a10 raw: ffff88802a71d800 000000000010000d 00000000f5000000 0000000000000000 head: 00fff00000000240 ffff88801b041dc0 ffffea0000a7f010 ffffea0000ca6a10 head: ffff88802a71d800 000000000010000d 00000000f5000000 0000000000000000 head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5620, tgid 5620 (syz-executor), ts 89089017748 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1853 prep_new_page mm/page_alloc.c:1861 [inline] get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3925 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5430 alloc_slab_page mm/slub.c:3378 [inline] allocate_slab+0x7d/0x620 mm/slub.c:3493 new_slab mm/slub.c:3544 [inline] refill_objects+0x2d5/0x350 mm/slub.c:7453 refill_sheaf mm/slub.c:2916 [inline] __pcs_replace_empty_main+0x2c8/0x6c0 mm/slub.c:4805 alloc_from_pcs mm/slub.c:4881 [inline] slab_alloc_node mm/slub.c:5015 [inline] __do_kmalloc_node mm/slub.c:5449 [inline] __kmalloc_noprof+0x476/0x710 mm/slub.c:5475 _kmalloc_noprof include/linux/slab.h:995 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] tomoyo_init_log+0x1a6b/0x1f60 security/tomoyo/audit.c:273 tomoyo_supervisor+0x35f/0x1550 security/tomoyo/common.c:2232 tomoyo_audit_mount_log security/tomoyo/mount.c:33 [inline] tomoyo_mount_acl security/tomoyo/mount.c:168 [inline] tomoyo_mount_permission+0x670/0x9e0 security/tomoyo/mount.c:239 security_sb_mount+0xe4/0x320 security/security.c:1102 path_mount+0xbc/0x1050 fs/namespace.c:4110 do_mount fs/namespace.c:4181 [inline] __do_sys_mount fs/namespace.c:4396 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4373 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 191 tgid 191 ts 89051991781 stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1400 [inline] __free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2944 __slab_free+0x274/0x2c0 mm/slub.c:5859 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4714 [inline] slab_alloc_node mm/slub.c:5027 [inline] __do_kmalloc_node mm/slub.c:5449 [inline] __kmalloc_noprof+0x302/0x710 mm/slub.c:5475 _kmalloc_noprof include/linux/slab.h:995 [inline] _kzalloc_noprof include/linux/slab.h:1312 [inline] fib6_info_alloc+0x30/0xf0 net/ipv6/ip6_fib.c:155 ip6_route_info_create+0x149/0x890 net/ipv6/route.c:3833 ip6_route_add+0x49/0x1b0 net/ipv6/route.c:3962 addrconf_add_mroute+0x2d1/0x370 net/ipv6/addrconf.c:2571 addrconf_add_dev net/ipv6/addrconf.c:2589 [inline] addrconf_dev_config net/ipv6/addrconf.c:3511 [inline] addrconf_init_auto_addrs+0x4d7/0xa50 net/ipv6/addrconf.c:3599 addrconf_notify+0xb1e/0x1050 net/ipv6/addrconf.c:3779 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:86 netif_state_change+0x27d/0x3a0 net/core/dev.c:1625 __linkwatch_run_queue+0x52a/0x800 net/core/link_watch.c:240 linkwatch_event+0x4c/0x60 net/core/link_watch.c:314 Memory state around the buggy address: ffff88802a71f780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802a71f800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802a71f880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802a71f900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802a71f980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================