[ 18.311187][ T65] ================================================================== [ 18.311548][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 18.311856][ T65] Read of size 8 at addr ffff8880050680f8 by task kworker/u16:1/65 [ 18.312146][ T65] [ 18.312250][ T65] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 18.312556][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.312812][ T65] Workqueue: netns cleanup_net [ 18.313028][ T65] Call Trace: [ 18.313182][ T65] [ 18.313292][ T65] dump_stack_lvl+0x82/0xd0 [ 18.313500][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 18.313779][ T65] ? cleanup_net+0x932/0xa40 [ 18.313985][ T65] print_report+0xb4/0x270 [ 18.314209][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 18.314424][ T65] kasan_report+0xbd/0xf0 [ 18.314589][ T65] ? cleanup_net+0x932/0xa40 [ 18.314808][ T65] cleanup_net+0x932/0xa40 [ 18.315022][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.315244][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 18.315466][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 18.315686][ T65] ? lock_acquire+0x32/0xc0 [ 18.315905][ T65] ? process_one_work+0xe0b/0x16d0 [ 18.316131][ T65] process_one_work+0xe55/0x16d0 [ 18.316362][ T65] ? __pfx___lock_release+0x10/0x10 [ 18.316590][ T65] ? __pfx_process_one_work+0x10/0x10 [ 18.316811][ T65] ? assign_work+0x16c/0x240 [ 18.317032][ T65] worker_thread+0x58c/0xce0 [ 18.317253][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 18.317522][ T65] ? __pfx_worker_thread+0x10/0x10 [ 18.317741][ T65] ? __pfx_worker_thread+0x10/0x10 [ 18.317955][ T65] kthread+0x28a/0x350 [ 18.318118][ T65] ? __pfx_kthread+0x10/0x10 [ 18.318346][ T65] ret_from_fork+0x31/0x70 [ 18.318554][ T65] ? __pfx_kthread+0x10/0x10 [ 18.318782][ T65] ret_from_fork_asm+0x1a/0x30 [ 18.319009][ T65] [ 18.319176][ T65] [ 18.319288][ T65] Allocated by task 223: [ 18.319461][ T65] kasan_save_stack+0x24/0x50 [ 18.319692][ T65] kasan_save_track+0x14/0x30 [ 18.319909][ T65] __kasan_slab_alloc+0x59/0x70 [ 18.320128][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.320346][ T65] copy_net_ns+0xc6/0x340 [ 18.320516][ T65] create_new_namespaces+0x35f/0x920 [ 18.320732][ T65] unshare_nsproxy_namespaces+0x8d/0x130 [ 18.320951][ T65] ksys_unshare+0x2a9/0x660 [ 18.321169][ T65] __x64_sys_unshare+0x31/0x40 [ 18.321393][ T65] do_syscall_64+0xc1/0x1d0 [ 18.321619][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.321899][ T65] [ 18.322012][ T65] Freed by task 65: [ 18.322184][ T65] kasan_save_stack+0x24/0x50 [ 18.322409][ T65] kasan_save_track+0x14/0x30 [ 18.322615][ T65] kasan_save_free_info+0x3b/0x60 [ 18.322818][ T65] __kasan_slab_free+0x38/0x50 [ 18.323033][ T65] kmem_cache_free+0xf8/0x330 [ 18.323252][ T65] cleanup_net+0x5a8/0xa40 [ 18.323474][ T65] process_one_work+0xe55/0x16d0 [ 18.323696][ T65] worker_thread+0x58c/0xce0 [ 18.323911][ T65] kthread+0x28a/0x350 [ 18.324077][ T65] ret_from_fork+0x31/0x70 [ 18.324292][ T65] ret_from_fork_asm+0x1a/0x30 [ 18.324512][ T65] [ 18.324625][ T65] Last potentially related work creation: [ 18.324838][ T65] kasan_save_stack+0x24/0x50 [ 18.325065][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 18.325281][ T65] insert_work+0x34/0x230 [ 18.325406][ T65] __queue_work+0x5fd/0xa40 [ 18.325560][ T65] queue_delayed_work_on+0x8c/0xa0 [ 18.325758][ T65] __inet_insert_ifa+0x751/0xb10 [ 18.325974][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 18.326165][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 18.326371][ T65] netlink_rcv_skb+0x130/0x360 [ 18.326584][ T65] netlink_unicast+0x44b/0x710 [ 18.326793][ T65] netlink_sendmsg+0x723/0xbe0 [ 18.326983][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 18.327201][ T65] ___sys_sendmsg+0xee/0x170 [ 18.327420][ T65] __sys_sendmsg+0x109/0x1a0 [ 18.327577][ T65] do_syscall_64+0xc1/0x1d0 [ 18.327742][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.327942][ T65] [ 18.328023][ T65] The buggy address belongs to the object at ffff888005068040 [ 18.328023][ T65] which belongs to the cache net_namespace of size 5696 [ 18.328431][ T65] The buggy address is located 184 bytes inside of [ 18.328431][ T65] freed 5696-byte region [ffff888005068040, ffff888005069680) [ 18.328810][ T65] [ 18.328888][ T65] The buggy address belongs to the physical page: [ 18.329075][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800506afc0 pfn:0x5068 [ 18.329388][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.329649][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.329846][ T65] page_type: f5(slab) [ 18.329968][ T65] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.330241][ T65] raw: ffff88800506afc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.330512][ T65] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 18.330798][ T65] head: ffff88800506afc0 0000000000050002 00000001f5000000 0000000000000000 [ 18.331067][ T65] head: 0080000000000003 ffffea0000141a01 ffffffffffffffff 0000000000000000 [ 18.331336][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.331607][ T65] page dumped because: kasan: bad access detected [ 18.331873][ T65] [ 18.331972][ T65] Memory state around the buggy address: [ 18.332165][ T65] ffff888005067f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.332407][ T65] ffff888005068000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.332633][ T65] >ffff888005068080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.332859][ T65] ^ [ 18.333145][ T65] ffff888005068100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.333367][ T65] ffff888005068180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.333654][ T65] ================================================================== [ 18.334008][ T65] Disabling lock debugging due to kernel taint