usb 1-1: Product: syz usb 1-1: Manufacturer: syz usb 1-1: SerialNumber: syz cdc_ether: probe of 1-1:1.0 failed with error -22 ================================================================== BUG: KASAN: double-free in slab_free mm/slub.c:3539 [inline] BUG: KASAN: double-free in kfree+0xe2/0x580 mm/slub.c:4567 CPU: 1 PID: 3726 Comm: kworker/1:7 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: events mptcp_worker Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:317 [inline] print_report.cold+0x2ba/0x719 mm/kasan/report.c:433 kasan_report_invalid_free+0x81/0x190 mm/kasan/report.c:462 ____kasan_slab_free+0x18b/0x1c0 mm/kasan/common.c:356 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1759 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1785 slab_free mm/slub.c:3539 [inline] kfree+0xe2/0x580 mm/slub.c:4567 tcp_disconnect+0x980/0x1e20 net/ipv4/tcp.c:3145 __mptcp_close_ssk+0x5ca/0x7e0 net/mptcp/protocol.c:2327 mptcp_do_fastclose net/mptcp/protocol.c:2592 [inline] mptcp_worker+0x78c/0xff0 net/mptcp/protocol.c:2627 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 28674: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc mm/kasan/common.c:516 [inline] ____kasan_kmalloc mm/kasan/common.c:475 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:525 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] lsm_task_alloc security/security.c:617 [inline] security_task_alloc+0x10b/0x250 security/security.c:1657 copy_process+0x23cf/0x7110 kernel/fork.c:2236 kernel_clone+0xe7/0x8f0 kernel/fork.c:2672 __do_sys_clone+0xba/0x100 kernel/fork.c:2806 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801f4a8900 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff88801f4a8900, ffff88801f4a8940) The buggy address belongs to the physical page: page:ffffea00007d2a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801f4a8680 pfn:0x1f4a8 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001f6aac8 ffffea0001fc4508 ffff888011841640 raw: ffff88801f4a8680 0000000000200006 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 3652, tgid 3652 (syz-executor.4), ts 361227792230, free_ts 361227752947 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5549 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:1829 [inline] allocate_slab+0x27e/0x3d0 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x84f/0xe80 mm/slub.c:3036 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3123 slab_alloc_node mm/slub.c:3214 [inline] kmem_cache_alloc_node_trace+0x185/0x410 mm/slub.c:3312 kmalloc_node include/linux/slab.h:618 [inline] kzalloc_node include/linux/slab.h:744 [inline] __get_vm_area_node+0xed/0x3f0 mm/vmalloc.c:2477 __vmalloc_node_range+0x250/0x13a0 mm/vmalloc.c:3156 __vmalloc_node mm/vmalloc.c:3261 [inline] vzalloc+0x67/0x80 mm/vmalloc.c:3334 do_ip6t_get_ctl+0x60f/0xa10 net/ipv6/netfilter/ip6_tables.c:817 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ipv6_getsockopt+0x1eb/0x2a0 net/ipv6/ipv6_sockglue.c:1509 tcp_getsockopt+0x95/0xf0 net/ipv4/tcp.c:4399 __sys_getsockopt+0x216/0x690 net/socket.c:2296 __do_sys_getsockopt net/socket.c:2311 [inline] __se_sys_getsockopt net/socket.c:2308 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x5e4/0xd20 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3476 __vunmap+0x85d/0xd30 mm/vmalloc.c:2696 __vfree+0x3c/0xd0 mm/vmalloc.c:2744 vfree+0x5a/0x90 mm/vmalloc.c:2775 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:884 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline] do_ip6t_get_ctl+0x82f/0xa10 net/ipv6/netfilter/ip6_tables.c:1672 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ipv6_getsockopt+0x1eb/0x2a0 net/ipv6/ipv6_sockglue.c:1509 tcp_getsockopt+0x95/0xf0 net/ipv4/tcp.c:4399 __sys_getsockopt+0x216/0x690 net/socket.c:2296 __do_sys_getsockopt net/socket.c:2311 [inline] __se_sys_getsockopt net/socket.c:2308 [inline] __x64_sys_getsockopt+0xba/0x150 net/socket.c:2308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88801f4a8800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88801f4a8880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff88801f4a8900: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff88801f4a8980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff88801f4a8a00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ==================================================================