[ 25.690623][ T390] ip (390) used greatest stack depth: 23416 bytes left [ 146.709572][ T11] ================================================================== [ 146.709837][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 146.710072][ T11] Read of size 8 at addr ffff8880060700f8 by task kworker/u16:0/11 [ 146.710284][ T11] [ 146.710361][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 146.710580][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 146.710755][ T11] Workqueue: netns cleanup_net [ 146.710909][ T11] Call Trace: [ 146.711015][ T11] [ 146.711111][ T11] dump_stack_lvl+0x82/0xd0 [ 146.711302][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 146.711518][ T11] ? cleanup_net+0x932/0xa40 [ 146.711706][ T11] print_report+0xb4/0x270 [ 146.711866][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 146.712029][ T11] kasan_report+0xbd/0xf0 [ 146.712155][ T11] ? cleanup_net+0x932/0xa40 [ 146.712296][ T11] cleanup_net+0x932/0xa40 [ 146.712452][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 146.712626][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 146.712787][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 146.712937][ T11] ? lock_acquire+0x32/0xc0 [ 146.713087][ T11] ? process_one_work+0xe0b/0x16d0 [ 146.713258][ T11] process_one_work+0xe55/0x16d0 [ 146.713425][ T11] ? __pfx___lock_release+0x10/0x10 [ 146.713594][ T11] ? __pfx_process_one_work+0x10/0x10 [ 146.713734][ T11] ? assign_work+0x16c/0x240 [ 146.713876][ T11] worker_thread+0x58c/0xce0 [ 146.714022][ T11] ? __pfx_worker_thread+0x10/0x10 [ 146.714180][ T11] kthread+0x28a/0x350 [ 146.714294][ T11] ? __pfx_kthread+0x10/0x10 [ 146.714436][ T11] ret_from_fork+0x31/0x70 [ 146.714598][ T11] ? __pfx_kthread+0x10/0x10 [ 146.714749][ T11] ret_from_fork_asm+0x1a/0x30 [ 146.714909][ T11] [ 146.715026][ T11] [ 146.715102][ T11] Allocated by task 264: [ 146.715216][ T11] kasan_save_stack+0x24/0x50 [ 146.715369][ T11] kasan_save_track+0x14/0x30 [ 146.715530][ T11] __kasan_slab_alloc+0x59/0x70 [ 146.715687][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 146.715864][ T11] copy_net_ns+0xc6/0x340 [ 146.715992][ T11] create_new_namespaces+0x35f/0x920 [ 146.716156][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 146.716342][ T11] ksys_unshare+0x2a9/0x660 [ 146.716510][ T11] __x64_sys_unshare+0x31/0x40 [ 146.716674][ T11] do_syscall_64+0xc1/0x1d0 [ 146.716833][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 146.717031][ T11] [ 146.717126][ T11] Freed by task 11: [ 146.717245][ T11] kasan_save_stack+0x24/0x50 [ 146.717413][ T11] kasan_save_track+0x14/0x30 [ 146.717566][ T11] kasan_save_free_info+0x3b/0x60 [ 146.717732][ T11] __kasan_slab_free+0x38/0x50 [ 146.717883][ T11] kmem_cache_free+0xf8/0x330 [ 146.718043][ T11] cleanup_net+0x5a8/0xa40 [ 146.718199][ T11] process_one_work+0xe55/0x16d0 [ 146.718358][ T11] worker_thread+0x58c/0xce0 [ 146.718520][ T11] kthread+0x28a/0x350 [ 146.718648][ T11] ret_from_fork+0x31/0x70 [ 146.718813][ T11] ret_from_fork_asm+0x1a/0x30 [ 146.718974][ T11] [ 146.719055][ T11] Last potentially related work creation: [ 146.719224][ T11] kasan_save_stack+0x24/0x50 [ 146.719398][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 146.719560][ T11] insert_work+0x34/0x230 [ 146.719688][ T11] __queue_work+0x5fd/0xa40 [ 146.719847][ T11] queue_delayed_work_on+0x8c/0xa0 [ 146.720013][ T11] __inet_insert_ifa+0x751/0xb10 [ 146.720171][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 146.720334][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 146.720497][ T11] netlink_rcv_skb+0x130/0x360 [ 146.720662][ T11] netlink_unicast+0x44b/0x710 [ 146.720814][ T11] netlink_sendmsg+0x723/0xbe0 [ 146.720979][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 146.721173][ T11] ___sys_sendmsg+0xee/0x170 [ 146.721357][ T11] __sys_sendmsg+0x109/0x1a0 [ 146.721507][ T11] do_syscall_64+0xc1/0x1d0 [ 146.721653][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 146.721841][ T11] [ 146.721914][ T11] Second to last potentially related work creation: [ 146.722120][ T11] kasan_save_stack+0x24/0x50 [ 146.722268][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 146.722424][ T11] insert_work+0x34/0x230 [ 146.722534][ T11] __queue_work+0x5fd/0xa40 [ 146.722670][ T11] queue_delayed_work_on+0x8c/0xa0 [ 146.722824][ T11] __inet_insert_ifa+0x751/0xb10 [ 146.722969][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 146.723114][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 146.723264][ T11] netlink_rcv_skb+0x130/0x360 [ 146.723408][ T11] netlink_unicast+0x44b/0x710 [ 146.723565][ T11] netlink_sendmsg+0x723/0xbe0 [ 146.723703][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 146.723850][ T11] ___sys_sendmsg+0xee/0x170 [ 146.723988][ T11] __sys_sendmsg+0x109/0x1a0 [ 146.724126][ T11] do_syscall_64+0xc1/0x1d0 [ 146.724267][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 146.724451][ T11] [ 146.724521][ T11] The buggy address belongs to the object at ffff888006070040 [ 146.724521][ T11] which belongs to the cache net_namespace of size 6592 [ 146.724906][ T11] The buggy address is located 184 bytes inside of [ 146.724906][ T11] freed 6592-byte region [ffff888006070040, ffff888006071a00) [ 146.725234][ T11] [ 146.725310][ T11] The buggy address belongs to the physical page: [ 146.725480][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6070 [ 146.725723][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 146.725930][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 146.726114][ T11] page_type: f5(slab) [ 146.726231][ T11] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffffea00002d4410 [ 146.726494][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 146.726747][ T11] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffffea00002d4410 [ 146.726998][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 146.727253][ T11] head: 0080000000000003 ffffea0000181c01 ffffffffffffffff 0000000000000000 [ 146.727525][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 146.727795][ T11] page dumped because: kasan: bad access detected [ 146.727982][ T11] [ 146.728064][ T11] Memory state around the buggy address: [ 146.728221][ T11] ffff88800606ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 146.728458][ T11] ffff888006070000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 146.728691][ T11] >ffff888006070080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 146.728918][ T11] ^ [ 146.729145][ T11] ffff888006070100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 146.729385][ T11] ffff888006070180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 146.729620][ T11] ================================================================== [ 146.729866][ T11] Disabling lock debugging due to kernel taint