[ 28.685566][ T11] ================================================================== [ 28.685822][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 28.686054][ T11] Read of size 8 at addr ffff88800a8380f8 by task kworker/u16:0/11 [ 28.686266][ T11] [ 28.686341][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 28.686573][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 28.686754][ T11] Workqueue: netns cleanup_net [ 28.686907][ T11] Call Trace: [ 28.687024][ T11] <TASK> [ 28.687100][ T11] dump_stack_lvl+0x82/0xd0 [ 28.687254][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 28.687440][ T11] ? cleanup_net+0x932/0xa40 [ 28.687584][ T11] print_report+0xb4/0x270 [ 28.687726][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 28.687874][ T11] kasan_report+0xbd/0xf0 [ 28.687983][ T11] ? cleanup_net+0x932/0xa40 [ 28.688130][ T11] cleanup_net+0x932/0xa40 [ 28.688277][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 28.688422][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 28.688566][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 28.688715][ T11] ? lock_acquire+0x32/0xc0 [ 28.688860][ T11] ? process_one_work+0xe0b/0x16d0 [ 28.689006][ T11] process_one_work+0xe55/0x16d0 [ 28.689150][ T11] ? __pfx___lock_release+0x10/0x10 [ 28.689299][ T11] ? __pfx_process_one_work+0x10/0x10 [ 28.689449][ T11] ? assign_work+0x16c/0x240 [ 28.689606][ T11] worker_thread+0x58c/0xce0 [ 28.689751][ T11] ? __pfx_worker_thread+0x10/0x10 [ 28.689894][ T11] kthread+0x28a/0x350 [ 28.690005][ T11] ? __pfx_kthread+0x10/0x10 [ 28.690153][ T11] ret_from_fork+0x31/0x70 [ 28.690296][ T11] ? __pfx_kthread+0x10/0x10 [ 28.690441][ T11] ret_from_fork_asm+0x1a/0x30 [ 28.690591][ T11] </TASK> [ 28.690699][ T11] [ 28.690772][ T11] Allocated by task 251: [ 28.690883][ T11] kasan_save_stack+0x24/0x50 [ 28.691029][ T11] kasan_save_track+0x14/0x30 [ 28.691170][ T11] __kasan_slab_alloc+0x59/0x70 [ 28.691314][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 28.691456][ T11] copy_net_ns+0xc6/0x340 [ 28.691564][ T11] create_new_namespaces+0x35f/0x920 [ 28.691709][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 28.691849][ T11] ksys_unshare+0x2a9/0x660 [ 28.691992][ T11] __x64_sys_unshare+0x31/0x40 [ 28.692136][ T11] do_syscall_64+0xc1/0x1d0 [ 28.692286][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.692465][ T11] [ 28.692538][ T11] Freed by task 11: [ 28.692646][ T11] kasan_save_stack+0x24/0x50 [ 28.692790][ T11] kasan_save_track+0x14/0x30 [ 28.692937][ T11] kasan_save_free_info+0x3b/0x60 [ 28.693082][ T11] __kasan_slab_free+0x38/0x50 [ 28.693222][ T11] kmem_cache_free+0xf8/0x330 [ 28.693366][ T11] cleanup_net+0x5a8/0xa40 [ 28.693520][ T11] process_one_work+0xe55/0x16d0 [ 28.693661][ T11] worker_thread+0x58c/0xce0 [ 28.693808][ T11] kthread+0x28a/0x350 [ 28.693918][ T11] ret_from_fork+0x31/0x70 [ 28.694058][ T11] ret_from_fork_asm+0x1a/0x30 [ 28.694201][ T11] [ 28.694274][ T11] Last potentially related work creation: [ 28.694420][ T11] kasan_save_stack+0x24/0x50 [ 28.694570][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 28.694722][ T11] insert_work+0x34/0x230 [ 28.694831][ T11] __queue_work+0x5fd/0xa40 [ 28.694972][ T11] queue_delayed_work_on+0x8c/0xa0 [ 28.695117][ T11] __inet_insert_ifa+0x751/0xb10 [ 28.695261][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 28.695408][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 28.695553][ T11] netlink_rcv_skb+0x130/0x360 [ 28.695710][ T11] netlink_unicast+0x44b/0x710 [ 28.695853][ T11] netlink_sendmsg+0x723/0xbe0 [ 28.695994][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 28.696136][ T11] ___sys_sendmsg+0xee/0x170 [ 28.696280][ T11] __sys_sendmsg+0x109/0x1a0 [ 28.696422][ T11] do_syscall_64+0xc1/0x1d0 [ 28.696562][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.696737][ T11] [ 28.696812][ T11] Second to last potentially related work creation: [ 28.696989][ T11] kasan_save_stack+0x24/0x50 [ 28.697135][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 28.697277][ T11] insert_work+0x34/0x230 [ 28.697388][ T11] __queue_work+0x5fd/0xa40 [ 28.697532][ T11] queue_delayed_work_on+0x8c/0xa0 [ 28.697674][ T11] __inet_insert_ifa+0x751/0xb10 [ 28.697832][ T11] inetdev_event+0xb18/0xcf0 [ 28.697973][ T11] notifier_call_chain+0xcd/0x150 [ 28.698116][ T11] __dev_notify_flags+0xe6/0x250 [ 28.698259][ T11] dev_change_flags+0xec/0x160 [ 28.698401][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 28.698544][ T11] rtnl_newlink+0x6de/0xa80 [ 28.698686][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 28.698830][ T11] netlink_rcv_skb+0x130/0x360 [ 28.698976][ T11] netlink_unicast+0x44b/0x710 [ 28.699121][ T11] netlink_sendmsg+0x723/0xbe0 [ 28.699263][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 28.699408][ T11] ___sys_sendmsg+0xee/0x170 [ 28.699549][ T11] __sys_sendmsg+0x109/0x1a0 [ 28.699688][ T11] do_syscall_64+0xc1/0x1d0 [ 28.699842][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.700019][ T11] [ 28.700095][ T11] The buggy address belongs to the object at ffff88800a838040 [ 28.700095][ T11] which belongs to the cache net_namespace of size 6592 [ 28.700473][ T11] The buggy address is located 184 bytes inside of [ 28.700473][ T11] freed 6592-byte region [ffff88800a838040, ffff88800a839a00) [ 28.700816][ T11] [ 28.700898][ T11] The buggy address belongs to the physical page: [ 28.701076][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a83b6c0 pfn:0xa838 [ 28.701364][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 28.701578][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 28.701758][ T11] page_type: f5(slab) [ 28.701868][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 28.702129][ T11] raw: ffff88800a83b6c0 0000000000040002 00000001f5000000 0000000000000000 [ 28.702377][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 28.702627][ T11] head: ffff88800a83b6c0 0000000000040002 00000001f5000000 0000000000000000 [ 28.702872][ T11] head: 0080000000000003 ffffea00002a0e01 ffffffffffffffff 0000000000000000 [ 28.703121][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 28.703364][ T11] page dumped because: kasan: bad access detected [ 28.703539][ T11] [ 28.703614][ T11] Memory state around the buggy address: [ 28.703753][ T11] ffff88800a837f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 28.703961][ T11] ffff88800a838000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.704173][ T11] >ffff88800a838080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.704379][ T11] ^ [ 28.704581][ T11] ffff88800a838100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.704792][ T11] ffff88800a838180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.705002][ T11] ================================================================== [ 28.705257][ T11] Disabling lock debugging due to kernel taint