[ 10.657896][ T239] bond0: (slave eth0): making interface the new active one [ 10.658800][ T239] bond0: (slave eth0): Enslaving as an active interface with an up link [ 15.397699][ T243] bond0: (slave eth0): Releasing backup interface [ 15.925181][ T246] bond0: (slave eth0): Enslaving as an active interface with an up link [ 20.530218][ T70] bond0: (slave eth0): Releasing backup interface [ 20.970641][ T70] bond0 (unregistering): Released all slaves [ 21.063342][ T70] ================================================================== [ 21.063832][ T70] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 21.064190][ T70] Read of size 8 at addr ffff8880020280f8 by task kworker/u16:1/70 [ 21.064551][ T70] [ 21.064680][ T70] CPU: 3 UID: 0 PID: 70 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 21.065051][ T70] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 21.065367][ T70] Workqueue: netns cleanup_net [ 21.065623][ T70] Call Trace: [ 21.065828][ T70] [ 21.065958][ T70] dump_stack_lvl+0x82/0xd0 [ 21.066222][ T70] print_address_description.constprop.0+0x2c/0x3b0 [ 21.066539][ T70] ? cleanup_net+0x932/0xa40 [ 21.066758][ T70] print_report+0xb4/0x270 [ 21.066984][ T70] ? kasan_addr_to_slab+0x25/0x80 [ 21.067179][ T70] kasan_report+0xbd/0xf0 [ 21.067305][ T70] ? cleanup_net+0x932/0xa40 [ 21.067496][ T70] cleanup_net+0x932/0xa40 [ 21.067698][ T70] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 21.067896][ T70] ? __pfx_cleanup_net+0x10/0x10 [ 21.068082][ T70] ? trace_lock_acquire+0x148/0x1f0 [ 21.068284][ T70] ? lock_acquire+0x32/0xc0 [ 21.068469][ T70] ? process_one_work+0xe0b/0x16d0 [ 21.068659][ T70] process_one_work+0xe55/0x16d0 [ 21.068850][ T70] ? __pfx___lock_release+0x10/0x10 [ 21.069048][ T70] ? __pfx_process_one_work+0x10/0x10 [ 21.069236][ T70] ? assign_work+0x16c/0x240 [ 21.069454][ T70] worker_thread+0x58c/0xce0 [ 21.069696][ T70] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 21.069999][ T70] ? __pfx_worker_thread+0x10/0x10 [ 21.070236][ T70] ? __pfx_worker_thread+0x10/0x10 [ 21.070471][ T70] kthread+0x28a/0x350 [ 21.070636][ T70] ? __pfx_kthread+0x10/0x10 [ 21.070814][ T70] ret_from_fork+0x31/0x70 [ 21.071000][ T70] ? __pfx_kthread+0x10/0x10 [ 21.071180][ T70] ret_from_fork_asm+0x1a/0x30 [ 21.071367][ T70] [ 21.071508][ T70] [ 21.071597][ T70] Allocated by task 232: [ 21.071748][ T70] kasan_save_stack+0x24/0x50 [ 21.071945][ T70] kasan_save_track+0x14/0x30 [ 21.072125][ T70] __kasan_slab_alloc+0x59/0x70 [ 21.072306][ T70] kmem_cache_alloc_noprof+0x10b/0x350 [ 21.072485][ T70] copy_net_ns+0xc6/0x340 [ 21.072627][ T70] create_new_namespaces+0x35f/0x920 [ 21.072817][ T70] unshare_nsproxy_namespaces+0x8d/0x130 [ 21.072994][ T70] ksys_unshare+0x2a9/0x660 [ 21.073186][ T70] __x64_sys_unshare+0x31/0x40 [ 21.073346][ T70] do_syscall_64+0xc1/0x1d0 [ 21.073539][ T70] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 21.073769][ T70] [ 21.073856][ T70] Freed by task 70: [ 21.073989][ T70] kasan_save_stack+0x24/0x50 [ 21.074169][ T70] kasan_save_track+0x14/0x30 [ 21.074352][ T70] kasan_save_free_info+0x3b/0x60 [ 21.074574][ T70] __kasan_slab_free+0x38/0x50 [ 21.074757][ T70] kmem_cache_free+0xf8/0x330 [ 21.074951][ T70] cleanup_net+0x5a8/0xa40 [ 21.075143][ T70] process_one_work+0xe55/0x16d0 [ 21.075342][ T70] worker_thread+0x58c/0xce0 [ 21.075542][ T70] kthread+0x28a/0x350 [ 21.075684][ T70] ret_from_fork+0x31/0x70 [ 21.075878][ T70] ret_from_fork_asm+0x1a/0x30 [ 21.076063][ T70] [ 21.076154][ T70] Last potentially related work creation: [ 21.076331][ T70] kasan_save_stack+0x24/0x50 [ 21.076506][ T70] __kasan_record_aux_stack+0x8e/0xa0 [ 21.076694][ T70] insert_work+0x34/0x230 [ 21.076823][ T70] __queue_work+0x5fd/0xa40 [ 21.077009][ T70] queue_delayed_work_on+0x8c/0xa0 [ 21.077190][ T70] __inet_insert_ifa+0x751/0xb10 [ 21.077387][ T70] inet_rtm_newaddr+0x833/0xbd0 [ 21.077580][ T70] rtnetlink_rcv_msg+0x712/0xc10 [ 21.077771][ T70] netlink_rcv_skb+0x130/0x360 [ 21.077979][ T70] netlink_unicast+0x44b/0x710 [ 21.078155][ T70] netlink_sendmsg+0x723/0xbe0 [ 21.078337][ T70] ____sys_sendmsg+0x7ac/0xa10 [ 21.078529][ T70] ___sys_sendmsg+0xee/0x170 [ 21.078732][ T70] __sys_sendmsg+0x109/0x1a0 [ 21.078934][ T70] do_syscall_64+0xc1/0x1d0 [ 21.079129][ T70] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 21.079369][ T70] [ 21.079466][ T70] The buggy address belongs to the object at ffff888002028040 [ 21.079466][ T70] which belongs to the cache net_namespace of size 5696 [ 21.080090][ T70] The buggy address is located 184 bytes inside of [ 21.080090][ T70] freed 5696-byte region [ffff888002028040, ffff888002029680) [ 21.080639][ T70] [ 21.080753][ T70] The buggy address belongs to the physical page: [ 21.081055][ T70] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800202afc0 pfn:0x2028 [ 21.081553][ T70] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 21.081877][ T70] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 21.082170][ T70] page_type: f5(slab) [ 21.082345][ T70] raw: 0080000000000240 ffff888001965240 ffff88800196a088 ffff88800196a088 [ 21.082784][ T70] raw: ffff88800202afc0 0000000000050002 00000001f5000000 0000000000000000 [ 21.083230][ T70] head: 0080000000000240 ffff888001965240 ffff88800196a088 ffff88800196a088 [ 21.083643][ T70] head: ffff88800202afc0 0000000000050002 00000001f5000000 0000000000000000 [ 21.084082][ T70] head: 0080000000000003 ffffea0000080a01 ffffffffffffffff 0000000000000000 [ 21.084489][ T70] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 21.084896][ T70] page dumped because: kasan: bad access detected [ 21.085208][ T70] [ 21.085327][ T70] Memory state around the buggy address: [ 21.085561][ T70] ffff888002027f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.085901][ T70] ffff888002028000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 21.086242][ T70] >ffff888002028080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.086627][ T70] ^ [ 21.086940][ T70] ffff888002028100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.087282][ T70] ffff888002028180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.087640][ T70] ================================================================== [ 21.088008][ T70] Disabling lock debugging due to kernel taint