[ 9.762554][ T253] netdevsim netdevsim344 eni344np1: renamed from eth0 [ 9.864986][ T251] netdevsim netdevsim679 eni679np1: renamed from eth1 [ 13.775437][ T11] ================================================================== [ 13.775646][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.775835][ T11] Read of size 8 at addr ffff888009dc00f8 by task kworker/u16:0/11 [ 13.776012][ T11] [ 13.776074][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.776264][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.776418][ T11] Workqueue: netns cleanup_net [ 13.776546][ T11] Call Trace: [ 13.776640][ T11] [ 13.776705][ T11] dump_stack_lvl+0x82/0xd0 [ 13.776839][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.776993][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.777115][ T11] print_report+0xb4/0x270 [ 13.777245][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.777367][ T11] kasan_report+0xbd/0xf0 [ 13.777460][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.777582][ T11] cleanup_net+0xa5d/0xb90 [ 13.777704][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.777835][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.777955][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.778077][ T11] ? lock_acquire+0x32/0xc0 [ 13.778199][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.778322][ T11] process_one_work+0xe55/0x16d0 [ 13.778446][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.778570][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.778697][ T11] ? assign_work+0x16c/0x240 [ 13.778824][ T11] worker_thread+0x58c/0xce0 [ 13.778955][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.779076][ T11] kthread+0x28a/0x350 [ 13.779173][ T11] ? __pfx_kthread+0x10/0x10 [ 13.779295][ T11] ret_from_fork+0x31/0x70 [ 13.779417][ T11] ? __pfx_kthread+0x10/0x10 [ 13.779539][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.779667][ T11] [ 13.779760][ T11] [ 13.779822][ T11] Allocated by task 261: [ 13.779920][ T11] kasan_save_stack+0x24/0x50 [ 13.780041][ T11] kasan_save_track+0x14/0x30 [ 13.780161][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.780283][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.780405][ T11] copy_net_ns+0xc6/0x540 [ 13.780496][ T11] create_new_namespaces+0x35f/0x920 [ 13.780619][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.780744][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.780867][ T11] __x64_sys_unshare+0x31/0x40 [ 13.780989][ T11] do_syscall_64+0xc1/0x1d0 [ 13.781118][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.781274][ T11] [ 13.781336][ T11] Freed by task 11: [ 13.781430][ T11] kasan_save_stack+0x24/0x50 [ 13.781554][ T11] kasan_save_track+0x14/0x30 [ 13.781677][ T11] kasan_save_free_info+0x3b/0x60 [ 13.781801][ T11] __kasan_slab_free+0x38/0x50 [ 13.781920][ T11] kmem_cache_free+0xf8/0x330 [ 13.782047][ T11] cleanup_net+0x5a8/0xb90 [ 13.782170][ T11] process_one_work+0xe55/0x16d0 [ 13.782291][ T11] worker_thread+0x58c/0xce0 [ 13.782411][ T11] kthread+0x28a/0x350 [ 13.782509][ T11] ret_from_fork+0x31/0x70 [ 13.782630][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.782751][ T11] [ 13.782813][ T11] Last potentially related work creation: [ 13.782937][ T11] kasan_save_stack+0x24/0x50 [ 13.783063][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.783189][ T11] insert_work+0x34/0x230 [ 13.783282][ T11] __queue_work+0x5fd/0xa40 [ 13.783404][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.783527][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.783651][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.783772][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.783894][ T11] netlink_rcv_skb+0x130/0x360 [ 13.784018][ T11] netlink_unicast+0x44b/0x710 [ 13.784141][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.784265][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.784388][ T11] ___sys_sendmsg+0xee/0x170 [ 13.784510][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.784633][ T11] do_syscall_64+0xc1/0x1d0 [ 13.784756][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.784914][ T11] [ 13.784995][ T11] The buggy address belongs to the object at ffff888009dc0040 [ 13.784995][ T11] which belongs to the cache net_namespace of size 6528 [ 13.785321][ T11] The buggy address is located 184 bytes inside of [ 13.785321][ T11] freed 6528-byte region [ffff888009dc0040, ffff888009dc19c0) [ 13.785614][ T11] [ 13.785680][ T11] The buggy address belongs to the physical page: [ 13.785827][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009dc3640 pfn:0x9dc0 [ 13.786070][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.786251][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.786405][ T11] page_type: f5(slab) [ 13.786506][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.786722][ T11] raw: ffff888009dc3640 0000000000040002 00000001f5000000 0000000000000000 [ 13.786934][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.787150][ T11] head: ffff888009dc3640 0000000000040002 00000001f5000000 0000000000000000 [ 13.787362][ T11] head: 0080000000000003 ffffea0000277001 ffffffffffffffff 0000000000000000 [ 13.787581][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.787793][ T11] page dumped because: kasan: bad access detected [ 13.787939][ T11] [ 13.788002][ T11] Memory state around the buggy address: [ 13.788119][ T11] ffff888009dbff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 13.788297][ T11] ffff888009dc0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.788583][ T11] >ffff888009dc0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.788838][ T11] ^ [ 13.789127][ T11] ffff888009dc0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.789398][ T11] ffff888009dc0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.789637][ T11] ================================================================== [ 13.789951][ T11] Disabling lock debugging due to kernel taint