[ 11.364366][ T265] ip (265) used greatest stack depth: 23936 bytes left [ 14.685036][ T306] netem: version 1.3 [ 126.262153][ T11] ================================================================== [ 126.262368][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 126.262558][ T11] Read of size 8 at addr ffff88800bb600f8 by task kworker/u16:0/11 [ 126.262734][ T11] [ 126.262799][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 126.262980][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 126.263132][ T11] Workqueue: netns cleanup_net [ 126.263264][ T11] Call Trace: [ 126.263358][ T11] [ 126.263423][ T11] dump_stack_lvl+0x82/0xd0 [ 126.263551][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 126.263707][ T11] ? cleanup_net+0x932/0xa40 [ 126.263833][ T11] print_report+0xb4/0x270 [ 126.263955][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 126.264081][ T11] kasan_report+0xbd/0xf0 [ 126.264176][ T11] ? cleanup_net+0x932/0xa40 [ 126.264301][ T11] cleanup_net+0x932/0xa40 [ 126.264423][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 126.264548][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 126.264669][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 126.264794][ T11] ? lock_acquire+0x32/0xc0 [ 126.264918][ T11] ? process_one_work+0xe0b/0x16d0 [ 126.265044][ T11] process_one_work+0xe55/0x16d0 [ 126.265167][ T11] ? __pfx___lock_release+0x10/0x10 [ 126.265291][ T11] ? __pfx_process_one_work+0x10/0x10 [ 126.265415][ T11] ? assign_work+0x16c/0x240 [ 126.265536][ T11] worker_thread+0x58c/0xce0 [ 126.265662][ T11] ? __pfx_worker_thread+0x10/0x10 [ 126.265785][ T11] kthread+0x28a/0x350 [ 126.265881][ T11] ? __pfx_kthread+0x10/0x10 [ 126.266011][ T11] ret_from_fork+0x31/0x70 [ 126.266131][ T11] ? __pfx_kthread+0x10/0x10 [ 126.266255][ T11] ret_from_fork_asm+0x1a/0x30 [ 126.266382][ T11] [ 126.266475][ T11] [ 126.266538][ T11] Allocated by task 248: [ 126.266630][ T11] kasan_save_stack+0x24/0x50 [ 126.266757][ T11] kasan_save_track+0x14/0x30 [ 126.266883][ T11] __kasan_slab_alloc+0x59/0x70 [ 126.267003][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 126.267125][ T11] copy_net_ns+0xc6/0x340 [ 126.267215][ T11] create_new_namespaces+0x35f/0x920 [ 126.267340][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 126.267461][ T11] ksys_unshare+0x2a9/0x660 [ 126.267582][ T11] __x64_sys_unshare+0x31/0x40 [ 126.267706][ T11] do_syscall_64+0xc1/0x1d0 [ 126.267828][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.267977][ T11] [ 126.268040][ T11] Freed by task 11: [ 126.268133][ T11] kasan_save_stack+0x24/0x50 [ 126.268256][ T11] kasan_save_track+0x14/0x30 [ 126.268378][ T11] kasan_save_free_info+0x3b/0x60 [ 126.268500][ T11] __kasan_slab_free+0x38/0x50 [ 126.268620][ T11] kmem_cache_free+0xf8/0x330 [ 126.268743][ T11] cleanup_net+0x5a8/0xa40 [ 126.268863][ T11] process_one_work+0xe55/0x16d0 [ 126.268985][ T11] worker_thread+0x58c/0xce0 [ 126.269107][ T11] kthread+0x28a/0x350 [ 126.269199][ T11] ret_from_fork+0x31/0x70 [ 126.269320][ T11] ret_from_fork_asm+0x1a/0x30 [ 126.269441][ T11] [ 126.269504][ T11] Last potentially related work creation: [ 126.269625][ T11] kasan_save_stack+0x24/0x50 [ 126.269754][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 126.269879][ T11] insert_work+0x34/0x230 [ 126.269971][ T11] __queue_work+0x5fd/0xa40 [ 126.270092][ T11] queue_delayed_work_on+0x8c/0xa0 [ 126.270215][ T11] __inet_insert_ifa+0x751/0xb10 [ 126.270348][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 126.270470][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 126.270591][ T11] netlink_rcv_skb+0x130/0x360 [ 126.270716][ T11] netlink_unicast+0x44b/0x710 [ 126.270836][ T11] netlink_sendmsg+0x723/0xbe0 [ 126.270956][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 126.271077][ T11] ___sys_sendmsg+0xee/0x170 [ 126.271201][ T11] __sys_sendmsg+0x109/0x1a0 [ 126.271324][ T11] do_syscall_64+0xc1/0x1d0 [ 126.271452][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.271602][ T11] [ 126.271664][ T11] Second to last potentially related work creation: [ 126.271813][ T11] kasan_save_stack+0x24/0x50 [ 126.271937][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 126.272063][ T11] insert_work+0x34/0x230 [ 126.272157][ T11] __queue_work+0x5fd/0xa40 [ 126.272283][ T11] queue_delayed_work_on+0x8c/0xa0 [ 126.272407][ T11] __inet_insert_ifa+0x751/0xb10 [ 126.272530][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 126.272653][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 126.272774][ T11] netlink_rcv_skb+0x130/0x360 [ 126.272894][ T11] netlink_unicast+0x44b/0x710 [ 126.273015][ T11] netlink_sendmsg+0x723/0xbe0 [ 126.273140][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 126.273257][ T11] ___sys_sendmsg+0xee/0x170 [ 126.273380][ T11] __sys_sendmsg+0x109/0x1a0 [ 126.273502][ T11] do_syscall_64+0xc1/0x1d0 [ 126.273623][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.273781][ T11] [ 126.273842][ T11] The buggy address belongs to the object at ffff88800bb60040 [ 126.273842][ T11] which belongs to the cache net_namespace of size 6080 [ 126.274164][ T11] The buggy address is located 184 bytes inside of [ 126.274164][ T11] freed 6080-byte region [ffff88800bb60040, ffff88800bb61800) [ 126.274455][ T11] [ 126.274521][ T11] The buggy address belongs to the physical page: [ 126.274669][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bb64c00 pfn:0xbb60 [ 126.274912][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 126.275096][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 126.275251][ T11] page_type: f5(slab) [ 126.275351][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 126.275568][ T11] raw: ffff88800bb64c00 0000000000050003 00000001f5000000 0000000000000000 [ 126.275782][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 126.276003][ T11] head: ffff88800bb64c00 0000000000050003 00000001f5000000 0000000000000000 [ 126.276235][ T11] head: 0080000000000003 ffffea00002ed801 ffffffffffffffff 0000000000000000 [ 126.276451][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 126.276665][ T11] page dumped because: kasan: bad access detected [ 126.276813][ T11] [ 126.276875][ T11] Memory state around the buggy address: [ 126.277054][ T11] ffff88800bb5ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 126.277234][ T11] ffff88800bb60000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 126.277406][ T11] >ffff88800bb60080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.277581][ T11] ^ [ 126.277754][ T11] ffff88800bb60100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.277931][ T11] ffff88800bb60180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.278165][ T11] ================================================================== [ 126.278358][ T11] Disabling lock debugging due to kernel taint