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:710 Read of size 8 at addr ffff8880599535f0 by task syz.1.50/6023 CPU: 1 UID: 0 PID: 6023 Comm: syz.1.50 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 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:710 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: 0033:0x7f625bb9de99 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:00007f625cb09028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f625be25fa0 RCX: 00007f625bb9de99 RDX: 000000000000000b RSI: 0000200000000280 RDI: 0000000000000003 RBP: 00007f625bc33eaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f625be26038 R14: 00007f625be25fa0 R15: 00007fff95523748 Allocated by task 6018: 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:5334 [inline] __kmalloc_flags_noprof+0x371/0x8b0 mm/slub.c:5528 _kmalloc_flags_noprof mm/slab.h:39 [inline] alloc_slab_obj_exts+0x5a/0x160 mm/slub.c:2149 __memcg_slab_post_alloc_hook+0x3d4/0x1160 mm/memcontrol.c:3587 memcg_slab_post_alloc_hook mm/slub.c:2447 [inline] slab_post_alloc_hook mm/slub.c:4603 [inline] slab_alloc_node mm/slub.c:4917 [inline] __kmalloc_cache_noprof+0x592/0x6c0 mm/slub.c:5485 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] kvm_set_memory_region+0xc43/0x15e0 virt/kvm/kvm_main.c:2097 kvm_vm_ioctl_set_memory_region virt/kvm/kvm_main.c:2147 [inline] kvm_vm_ioctl+0x1e00/0x4180 virt/kvm/kvm_main.c:5202 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 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 ffff888059953500 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 112 bytes to the right of allocated 128-byte region [ffff888059953500, ffff888059953580) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x59953 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801bc42a00 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800100010 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5748, tgid 5748 (udevd), ts 51822576469, free_ts 51822288745 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:3266 [inline] allocate_slab mm/slub.c:3380 [inline] new_slab+0xa2/0x640 mm/slub.c:3426 refill_objects+0xe3/0x410 mm/slub.c:7310 refill_sheaf mm/slub.c:2804 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4675 alloc_from_pcs mm/slub.c:4773 [inline] slab_alloc_node mm/slub.c:4905 [inline] __kmalloc_cache_noprof+0x479/0x6c0 mm/slub.c:5485 _kmalloc_noprof include/linux/slab.h:988 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] kernfs_get_open_node fs/kernfs/file.c:536 [inline] kernfs_fop_open+0x9fa/0xd50 fs/kernfs/file.c:711 do_dentry_open+0x6ab/0x14d0 fs/open.c:947 vfs_open+0x82/0x3f0 fs/open.c:1052 do_open fs/namei.c:4700 [inline] path_openat+0x2873/0x4280 fs/namei.c:4863 do_file_open+0x20e/0x430 fs/namei.c:4892 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368 do_sys_open fs/open.c:1374 [inline] __do_sys_openat fs/open.c:1390 [inline] __se_sys_openat fs/open.c:1385 [inline] __x64_sys_openat+0x12d/0x210 fs/open.c:1385 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 page last free pid 5748 tgid 5748 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 selinux_genfs_get_sid security/selinux/hooks.c:1364 [inline] inode_doinit_with_dentry+0x99d/0x1320 security/selinux/hooks.c:1563 selinux_d_instantiate+0x26/0x40 security/selinux/hooks.c:6678 security_d_instantiate+0x14c/0x1b0 security/security.c:3704 d_splice_alias_ops+0xd7/0x15c0 fs/dcache.c:3244 kernfs_iop_lookup+0x23f/0x2d0 fs/kernfs/dir.c:1288 __lookup_slow+0x155/0x320 fs/namei.c:1919 lookup_slow+0x50/0x70 fs/namei.c:1936 walk_component fs/namei.c:2282 [inline] lookup_last fs/namei.c:2789 [inline] path_lookupat+0x5e8/0xc40 fs/namei.c:2813 filename_lookup+0x202/0x590 fs/namei.c:2842 vfs_statx+0xff/0x3f0 fs/stat.c:353 vfs_fstatat+0x77/0xe0 fs/stat.c:373 __do_sys_newfstatat+0x9d/0x120 fs/stat.c:538 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 Memory state around the buggy address: ffff888059953480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888059953500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888059953580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888059953600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888059953680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================