configfs-gadget.g1 gadget.0: uvc: uvc_function_bind() configfs-gadget.g1 gadget.0: uvc: Unable to allocate streaming EP ================================================================== BUG: KASAN: slab-out-of-bounds in list_empty include/linux/list.h:404 [inline] BUG: KASAN: slab-out-of-bounds in dummy_free_request+0x8a/0x90 drivers/usb/gadget/udc/dummy_hcd.c:691 Read of size 8 at addr ffff88802b5cbcf0 by task syz.1.973/8658 CPU: 1 UID: 0 PID: 8658 Comm: syz.1.973 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 list_empty include/linux/list.h:404 [inline] dummy_free_request+0x8a/0x90 drivers/usb/gadget/udc/dummy_hcd.c:691 uvc_function_bind+0x181a/0x1939 drivers/usb/gadget/function/f_uvc.c:893 usb_add_function+0x219/0x890 drivers/usb/gadget/composite.c:333 configfs_composite_bind+0xd83/0x1960 drivers/usb/gadget/configfs.c:1802 gadget_bind_driver+0x28c/0xbf0 drivers/usb/gadget/udc/core.c:1662 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898 __driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292 bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383 bus_add_driver+0x305/0x5b0 drivers/base/bus.c:763 driver_register+0x1e2/0x360 drivers/base/driver.c:174 usb_gadget_register_driver_owner+0x132/0x210 drivers/usb/gadget/udc/core.c:1752 gadget_dev_desc_UDC_store+0x1b0/0x2e0 drivers/usb/gadget/configfs.c:300 flush_write_buffer fs/configfs/file.c:207 [inline] configfs_write_iter+0x302/0x4e0 fs/configfs/file.c:229 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f269239de99 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:00007f26932c4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f2692625fa0 RCX: 00007f269239de99 RDX: 000000000000000b RSI: 0000200000000d00 RDI: 0000000000000003 RBP: 00007f2692433eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2692626038 R14: 00007f2692625fa0 R15: 00007ffe75de00d8 Allocated by task 6055: kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_save_track+0x14/0x30 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5362 [inline] __kmalloc_noprof+0x322/0x820 mm/slub.c:5387 _kmalloc_noprof include/linux/slab.h:973 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] hash_netportnet6_resize+0xdb2/0x1e20 net/netfilter/ipset/ip_set_hash_gen.h:721 call_ad.isra.0+0x36d/0x940 net/netfilter/ipset/ip_set_core.c:1764 ip_set_ad.isra.0+0x3eb/0x8a0 net/netfilter/ipset/ip_set_core.c:1848 nfnetlink_rcv_msg+0x9d5/0x11e0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556 nfnetlink_rcv+0x1b3/0x440 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2684 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2738 __sys_sendmsg+0x160/0x210 net/socket.c:2770 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802b5cbc00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 128 bytes to the right of allocated 112-byte region [ffff88802b5cbc00, ffff88802b5cbc70) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802b5cb100 pfn:0x2b5cb flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000200 ffff88813fe22a00 ffffea00009aba50 ffffea0001dc5390 raw: ffff88802b5cb100 000000080010000a 00000000f5000000 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 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6055, tgid 6054 (syz.4.86), ts 90761770338, free_ts 81591648191 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3294 [inline] allocate_slab mm/slub.c:3408 [inline] new_slab+0xa2/0x650 mm/slub.c:3454 refill_objects+0xe3/0x410 mm/slub.c:7338 refill_sheaf mm/slub.c:2832 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703 alloc_from_pcs mm/slub.c:4801 [inline] slab_alloc_node mm/slub.c:4933 [inline] __do_kmalloc_node mm/slub.c:5361 [inline] __kmalloc_noprof+0x66d/0x820 mm/slub.c:5387 _kmalloc_noprof include/linux/slab.h:973 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] hash_netportnet6_resize+0xdb2/0x1e20 net/netfilter/ipset/ip_set_hash_gen.h:721 call_ad.isra.0+0x36d/0x940 net/netfilter/ipset/ip_set_core.c:1764 ip_set_ad.isra.0+0x3eb/0x8a0 net/netfilter/ipset/ip_set_core.c:1848 nfnetlink_rcv_msg+0x9d5/0x11e0 net/netfilter/nfnetlink.c:300 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2556 nfnetlink_rcv+0x1b3/0x440 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0xa4d/0xbe0 net/socket.c:2684 page last free pid 1110 tgid 1110 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 __folio_put+0x3b4/0x5f0 mm/swap.c:112 folio_put_refs include/linux/mm.h:2144 [inline] gup_put_folio+0x1cb/0x270 mm/gup.c:114 io_release_ubuf+0xce/0x140 io_uring/rsrc.c:157 io_buffer_unmap io_uring/rsrc.c:224 [inline] io_free_rsrc_node+0x718/0xbc0 io_uring/rsrc.c:596 io_put_rsrc_node io_uring/rsrc.h:107 [inline] io_rsrc_data_free+0x1e7/0x25d io_uring/rsrc.c:281 io_sqe_buffers_unregister.cold+0x12/0x17 io_uring/rsrc.c:690 io_ring_ctx_free io_uring/io_uring.c:2169 [inline] io_ring_exit_work+0x73c/0xd7a io_uring/io_uring.c:2419 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff88802b5cbb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802b5cbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc >ffff88802b5cbc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88802b5cbd00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802b5cbd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================