[ 11.742749][ T11] ================================================================== [ 11.742984][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.743191][ T11] Read of size 8 at addr ffff88800aed80f8 by task kworker/u16:0/11 [ 11.743391][ T11] [ 11.743462][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.743669][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.743839][ T11] Workqueue: netns cleanup_net [ 11.743992][ T11] Call Trace: [ 11.744100][ T11] [ 11.744173][ T11] dump_stack_lvl+0x82/0xd0 [ 11.744314][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.744495][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.744634][ T11] print_report+0xb4/0x270 [ 11.744768][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.744955][ T11] kasan_report+0xbd/0xf0 [ 11.745057][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.745195][ T11] cleanup_net+0xa5d/0xb90 [ 11.745329][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.745482][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.745617][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.745757][ T11] ? lock_acquire+0x32/0xc0 [ 11.745893][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.746030][ T11] process_one_work+0xe55/0x16d0 [ 11.746169][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.746310][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.746449][ T11] ? assign_work+0x16c/0x240 [ 11.746585][ T11] worker_thread+0x58c/0xce0 [ 11.746725][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.746864][ T11] kthread+0x28a/0x350 [ 11.746971][ T11] ? __pfx_kthread+0x10/0x10 [ 11.747108][ T11] ret_from_fork+0x31/0x70 [ 11.747244][ T11] ? __pfx_kthread+0x10/0x10 [ 11.747382][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.747523][ T11] [ 11.747639][ T11] [ 11.747708][ T11] Allocated by task 252: [ 11.747812][ T11] kasan_save_stack+0x24/0x50 [ 11.747953][ T11] kasan_save_track+0x14/0x30 [ 11.748088][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.748222][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.748358][ T11] copy_net_ns+0xc6/0x540 [ 11.748460][ T11] create_new_namespaces+0x35f/0x920 [ 11.748596][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.748739][ T11] ksys_unshare+0x2c4/0x6e0 [ 11.748879][ T11] __x64_sys_unshare+0x31/0x40 [ 11.749016][ T11] do_syscall_64+0xc1/0x1d0 [ 11.749154][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.749324][ T11] [ 11.749393][ T11] Freed by task 11: [ 11.749499][ T11] kasan_save_stack+0x24/0x50 [ 11.749637][ T11] kasan_save_track+0x14/0x30 [ 11.749772][ T11] kasan_save_free_info+0x3b/0x60 [ 11.749912][ T11] __kasan_slab_free+0x38/0x50 [ 11.750046][ T11] kmem_cache_free+0xf8/0x330 [ 11.750185][ T11] cleanup_net+0x5a8/0xb90 [ 11.750318][ T11] process_one_work+0xe55/0x16d0 [ 11.750453][ T11] worker_thread+0x58c/0xce0 [ 11.750587][ T11] kthread+0x28a/0x350 [ 11.750693][ T11] ret_from_fork+0x31/0x70 [ 11.750833][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.750967][ T11] [ 11.751037][ T11] Last potentially related work creation: [ 11.751172][ T11] kasan_save_stack+0x24/0x50 [ 11.751310][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 11.751446][ T11] insert_work+0x34/0x230 [ 11.751549][ T11] __queue_work+0x5fd/0xa40 [ 11.751685][ T11] queue_delayed_work_on+0x8c/0xa0 [ 11.751823][ T11] __inet_insert_ifa+0x751/0xb10 [ 11.751962][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 11.752101][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 11.752238][ T11] netlink_rcv_skb+0x130/0x360 [ 11.752380][ T11] netlink_unicast+0x44b/0x710 [ 11.752517][ T11] netlink_sendmsg+0x723/0xbe0 [ 11.752653][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 11.752790][ T11] ___sys_sendmsg+0xee/0x170 [ 11.752927][ T11] __sys_sendmsg+0x109/0x1a0 [ 11.753062][ T11] do_syscall_64+0xc1/0x1d0 [ 11.753199][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.753372][ T11] [ 11.753442][ T11] Second to last potentially related work creation: [ 11.753624][ T11] kasan_save_stack+0x24/0x50 [ 11.753763][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 11.753901][ T11] insert_work+0x34/0x230 [ 11.754010][ T11] __queue_work+0x5fd/0xa40 [ 11.754145][ T11] queue_delayed_work_on+0x8c/0xa0 [ 11.754281][ T11] __inet_insert_ifa+0x751/0xb10 [ 11.754418][ T11] inetdev_event+0xb18/0xcf0 [ 11.754556][ T11] notifier_call_chain+0xcd/0x150 [ 11.754697][ T11] __dev_notify_flags+0xe6/0x250 [ 11.754845][ T11] dev_change_flags+0xec/0x160 [ 11.754981][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 11.755122][ T11] rtnl_newlink+0x6de/0xa80 [ 11.755259][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 11.755395][ T11] netlink_rcv_skb+0x130/0x360 [ 11.755531][ T11] netlink_unicast+0x44b/0x710 [ 11.755669][ T11] netlink_sendmsg+0x723/0xbe0 [ 11.755806][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 11.755943][ T11] ___sys_sendmsg+0xee/0x170 [ 11.756081][ T11] __sys_sendmsg+0x109/0x1a0 [ 11.756220][ T11] do_syscall_64+0xc1/0x1d0 [ 11.756359][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.756529][ T11] [ 11.756599][ T11] The buggy address belongs to the object at ffff88800aed8040 [ 11.756599][ T11] which belongs to the cache net_namespace of size 6528 [ 11.756959][ T11] The buggy address is located 184 bytes inside of [ 11.756959][ T11] freed 6528-byte region [ffff88800aed8040, ffff88800aed99c0) [ 11.757287][ T11] [ 11.757356][ T11] The buggy address belongs to the physical page: [ 11.757526][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800aedb640 pfn:0xaed8 [ 11.757810][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.758015][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.758190][ T11] page_type: f5(slab) [ 11.758297][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.758544][ T11] raw: ffff88800aedb640 0000000000040002 00000001f5000000 0000000000000000 [ 11.758786][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.759026][ T11] head: ffff88800aedb640 0000000000040002 00000001f5000000 0000000000000000 [ 11.759267][ T11] head: 0080000000000003 ffffea00002bb601 ffffffffffffffff 0000000000000000 [ 11.759507][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.759741][ T11] page dumped because: kasan: bad access detected [ 11.759908][ T11] [ 11.759978][ T11] Memory state around the buggy address: [ 11.760110][ T11] ffff88800aed7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.760306][ T11] ffff88800aed8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.760505][ T11] >ffff88800aed8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.760704][ T11] ^ [ 11.760897][ T11] ffff88800aed8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.761094][ T11] ffff88800aed8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.761293][ T11] ================================================================== [ 11.761550][ T11] Disabling lock debugging due to kernel taint [ 23.466253][ C1] IPv4: Oversized IP packet from 172.17.0.2