================================================================== 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: 0 PID: 15 Comm: kworker/0:1 Not tainted 6.0.0-syzkaller-09413-g4899a36f91a9 #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 3657: 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_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] vmalloc+0x67/0x80 mm/vmalloc.c:3294 xt_compat_init_offsets+0xdf/0x220 net/netfilter/x_tables.c:733 ebt_compat_init_offsets net/bridge/netfilter/ebtables.c:1828 [inline] compat_table_info+0x11b/0x7b0 net/bridge/netfilter/ebtables.c:1839 compat_do_ebt_get_ctl+0x33d/0xad0 net/bridge/netfilter/ebtables.c:2392 do_ebt_get_ctl+0x2b0/0x790 net/bridge/netfilter/ebtables.c:2455 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x185/0x1e0 net/ipv4/ip_sockglue.c:1796 tcp_getsockopt+0x95/0xf0 net/ipv4/tcp.c:4399 __sys_getsockopt+0x216/0x690 net/socket.c:2296 __do_compat_sys_socketcall+0x513/0x660 net/compat.c:492 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 The buggy address belongs to the object at ffff8880655f9900 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 0 bytes inside of 64-byte region [ffff8880655f9900, ffff8880655f9940) The buggy address belongs to the physical page: page:ffffea0001957e40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880655f9600 pfn:0x655f9 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000961148 ffffea00007d9ec8 ffff888011841640 raw: ffff8880655f9600 0000000000200011 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 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 3654, tgid 3654 (syz-executor.5), ts 187647284503, free_ts 187474053075 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] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x323/0x3e0 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] sctp_inetaddr_event+0x3a5/0x6c0 net/sctp/protocol.c:787 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 blocking_notifier_call_chain kernel/notifier.c:382 [inline] blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:370 __inet_insert_ifa+0x919/0xbd0 net/ipv4/devinet.c:554 inet_rtm_newaddr+0x54d/0x980 net/ipv4/devinet.c:960 rtnetlink_rcv_msg+0x43a/0xca0 net/core/rtnetlink.c:6091 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2540 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921 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 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2553 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x2c0/0x3e0 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:643 [inline] netdevice_event+0x1ad/0x8b0 drivers/infiniband/core/roce_gid_mgmt.c:802 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1945 call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] dev_set_mac_address+0x2d3/0x3d0 net/core/dev.c:8799 dev_set_mac_address_user+0x2d/0x50 net/core/dev.c:8813 do_setlink+0x18c4/0x3bb0 net/core/rtnetlink.c:2736 __rtnl_newlink+0xd6a/0x17e0 net/core/rtnetlink.c:3547 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3594 rtnetlink_rcv_msg+0x43a/0xca0 net/core/rtnetlink.c:6091 Memory state around the buggy address: ffff8880655f9800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880655f9880: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc >ffff8880655f9900: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8880655f9980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8880655f9a00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================