[ 79.055068][ T11] ================================================================== [ 79.055282][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 79.055472][ T11] Read of size 8 at addr ffff88800c5f00f8 by task kworker/u16:0/11 [ 79.055650][ T11] [ 79.055714][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 79.055899][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 79.056052][ T11] Workqueue: netns cleanup_net [ 79.056181][ T11] Call Trace: [ 79.056306][ T11] [ 79.056378][ T11] dump_stack_lvl+0x82/0xd0 [ 79.056509][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 79.056671][ T11] ? cleanup_net+0xa5d/0xb90 [ 79.056796][ T11] print_report+0xb4/0x270 [ 79.056920][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 79.057045][ T11] kasan_report+0xbd/0xf0 [ 79.057140][ T11] ? cleanup_net+0xa5d/0xb90 [ 79.057264][ T11] cleanup_net+0xa5d/0xb90 [ 79.057385][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 79.057511][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 79.057635][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 79.057761][ T11] ? lock_acquire+0x32/0xc0 [ 79.057883][ T11] ? process_one_work+0xe0b/0x16d0 [ 79.058009][ T11] process_one_work+0xe55/0x16d0 [ 79.058133][ T11] ? __pfx___lock_release+0x10/0x10 [ 79.058256][ T11] ? __pfx_process_one_work+0x10/0x10 [ 79.058383][ T11] ? assign_work+0x16c/0x240 [ 79.058509][ T11] worker_thread+0x58c/0xce0 [ 79.058636][ T11] ? __pfx_worker_thread+0x10/0x10 [ 79.058758][ T11] kthread+0x28a/0x350 [ 79.058852][ T11] ? __pfx_kthread+0x10/0x10 [ 79.058976][ T11] ret_from_fork+0x31/0x70 [ 79.059101][ T11] ? __pfx_kthread+0x10/0x10 [ 79.059224][ T11] ret_from_fork_asm+0x1a/0x30 [ 79.059353][ T11] [ 79.059446][ T11] [ 79.059510][ T11] Allocated by task 325: [ 79.059602][ T11] kasan_save_stack+0x24/0x50 [ 79.059729][ T11] kasan_save_track+0x14/0x30 [ 79.059849][ T11] __kasan_slab_alloc+0x59/0x70 [ 79.059972][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 79.060099][ T11] copy_net_ns+0xc6/0x540 [ 79.060192][ T11] create_new_namespaces+0x35f/0x920 [ 79.060318][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 79.060441][ T11] ksys_unshare+0x2c4/0x6e0 [ 79.060568][ T11] __x64_sys_unshare+0x31/0x40 [ 79.060691][ T11] do_syscall_64+0xc1/0x1d0 [ 79.060815][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.060969][ T11] [ 79.061034][ T11] Freed by task 11: [ 79.061125][ T11] kasan_save_stack+0x24/0x50 [ 79.061248][ T11] kasan_save_track+0x14/0x30 [ 79.061369][ T11] kasan_save_free_info+0x3b/0x60 [ 79.061492][ T11] __kasan_slab_free+0x38/0x50 [ 79.061617][ T11] kmem_cache_free+0xf8/0x330 [ 79.061741][ T11] cleanup_net+0x5a8/0xb90 [ 79.061863][ T11] process_one_work+0xe55/0x16d0 [ 79.061988][ T11] worker_thread+0x58c/0xce0 [ 79.062110][ T11] kthread+0x28a/0x350 [ 79.062203][ T11] ret_from_fork+0x31/0x70 [ 79.062325][ T11] ret_from_fork_asm+0x1a/0x30 [ 79.062447][ T11] [ 79.062513][ T11] Last potentially related work creation: [ 79.062636][ T11] kasan_save_stack+0x24/0x50 [ 79.062763][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 79.062887][ T11] insert_work+0x34/0x230 [ 79.062983][ T11] __queue_work+0x5fd/0xa40 [ 79.063107][ T11] queue_delayed_work_on+0x8c/0xa0 [ 79.063230][ T11] __inet_insert_ifa+0x751/0xb10 [ 79.063355][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 79.063480][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 79.063606][ T11] netlink_rcv_skb+0x130/0x360 [ 79.063745][ T11] netlink_unicast+0x44b/0x710 [ 79.063871][ T11] netlink_sendmsg+0x723/0xbe0 [ 79.063996][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 79.064120][ T11] ___sys_sendmsg+0xee/0x170 [ 79.064245][ T11] __sys_sendmsg+0x109/0x1a0 [ 79.064370][ T11] do_syscall_64+0xc1/0x1d0 [ 79.064495][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.064649][ T11] [ 79.064712][ T11] Second to last potentially related work creation: [ 79.064864][ T11] kasan_save_stack+0x24/0x50 [ 79.064990][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 79.065114][ T11] insert_work+0x34/0x230 [ 79.065210][ T11] __queue_work+0x5fd/0xa40 [ 79.065333][ T11] queue_delayed_work_on+0x8c/0xa0 [ 79.065457][ T11] __inet_insert_ifa+0x751/0xb10 [ 79.065584][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 79.065708][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 79.065831][ T11] netlink_rcv_skb+0x130/0x360 [ 79.065955][ T11] netlink_unicast+0x44b/0x710 [ 79.066079][ T11] netlink_sendmsg+0x723/0xbe0 [ 79.066202][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 79.066335][ T11] ___sys_sendmsg+0xee/0x170 [ 79.066460][ T11] __sys_sendmsg+0x109/0x1a0 [ 79.066585][ T11] do_syscall_64+0xc1/0x1d0 [ 79.066708][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 79.066861][ T11] [ 79.066925][ T11] The buggy address belongs to the object at ffff88800c5f0040 [ 79.066925][ T11] which belongs to the cache net_namespace of size 6528 [ 79.067247][ T11] The buggy address is located 184 bytes inside of [ 79.067247][ T11] freed 6528-byte region [ffff88800c5f0040, ffff88800c5f19c0) [ 79.067544][ T11] [ 79.067606][ T11] The buggy address belongs to the physical page: [ 79.067758][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c5f5140 pfn:0xc5f0 [ 79.068005][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 79.068191][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 79.068353][ T11] page_type: f5(slab) [ 79.068452][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 79.068672][ T11] raw: ffff88800c5f5140 0000000000040003 00000001f5000000 0000000000000000 [ 79.068890][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 79.069109][ T11] head: ffff88800c5f5140 0000000000040003 00000001f5000000 0000000000000000 [ 79.069327][ T11] head: 0080000000000003 ffffea0000317c01 ffffffffffffffff 0000000000000000 [ 79.069545][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 79.069762][ T11] page dumped because: kasan: bad access detected [ 79.069914][ T11] [ 79.069976][ T11] Memory state around the buggy address: [ 79.070095][ T11] ffff88800c5eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 79.070271][ T11] ffff88800c5f0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 79.070449][ T11] >ffff88800c5f0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 79.070627][ T11] ^ [ 79.070805][ T11] ffff88800c5f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 79.070981][ T11] ffff88800c5f0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 79.071155][ T11] ================================================================== [ 79.071448][ T11] Disabling lock debugging due to kernel taint [ 123.341276][ T1459] mpls_gso: MPLS GSO support