[ 10.463775][ T11] ================================================================== [ 10.464004][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 10.464218][ T11] Read of size 8 at addr ffff8880051b00f8 by task kworker/u16:0/11 [ 10.464417][ T11] [ 10.464488][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 10.464694][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.464863][ T11] Workqueue: netns cleanup_net [ 10.465006][ T11] Call Trace: [ 10.465109][ T11] [ 10.465183][ T11] dump_stack_lvl+0x82/0xd0 [ 10.465323][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 10.465495][ T11] ? cleanup_net+0xa5d/0xb90 [ 10.465645][ T11] print_report+0xb4/0x270 [ 10.465786][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 10.465924][ T11] kasan_report+0xbd/0xf0 [ 10.466030][ T11] ? cleanup_net+0xa5d/0xb90 [ 10.466169][ T11] cleanup_net+0xa5d/0xb90 [ 10.466305][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.466443][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 10.466579][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 10.466719][ T11] ? lock_acquire+0x32/0xc0 [ 10.466855][ T11] ? process_one_work+0xe0b/0x16d0 [ 10.466993][ T11] process_one_work+0xe55/0x16d0 [ 10.467132][ T11] ? __pfx___lock_release+0x10/0x10 [ 10.467270][ T11] ? __pfx_process_one_work+0x10/0x10 [ 10.467407][ T11] ? assign_work+0x16c/0x240 [ 10.467542][ T11] worker_thread+0x58c/0xce0 [ 10.467681][ T11] ? __pfx_worker_thread+0x10/0x10 [ 10.467818][ T11] kthread+0x28a/0x350 [ 10.467923][ T11] ? __pfx_kthread+0x10/0x10 [ 10.468059][ T11] ret_from_fork+0x31/0x70 [ 10.468196][ T11] ? __pfx_kthread+0x10/0x10 [ 10.468336][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.468476][ T11] [ 10.468582][ T11] [ 10.468650][ T11] Allocated by task 251: [ 10.468753][ T11] kasan_save_stack+0x24/0x50 [ 10.468897][ T11] kasan_save_track+0x14/0x30 [ 10.469030][ T11] __kasan_slab_alloc+0x59/0x70 [ 10.469164][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.469302][ T11] copy_net_ns+0xc6/0x540 [ 10.469405][ T11] create_new_namespaces+0x35f/0x920 [ 10.469544][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 10.469679][ T11] ksys_unshare+0x2c4/0x6e0 [ 10.469816][ T11] __x64_sys_unshare+0x31/0x40 [ 10.469951][ T11] do_syscall_64+0xc1/0x1d0 [ 10.470090][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.470264][ T11] [ 10.470335][ T11] Freed by task 11: [ 10.470438][ T11] kasan_save_stack+0x24/0x50 [ 10.470579][ T11] kasan_save_track+0x14/0x30 [ 10.470716][ T11] kasan_save_free_info+0x3b/0x60 [ 10.470854][ T11] __kasan_slab_free+0x38/0x50 [ 10.470990][ T11] kmem_cache_free+0xf8/0x330 [ 10.471126][ T11] cleanup_net+0x5a8/0xb90 [ 10.471260][ T11] process_one_work+0xe55/0x16d0 [ 10.471399][ T11] worker_thread+0x58c/0xce0 [ 10.471537][ T11] kthread+0x28a/0x350 [ 10.471645][ T11] ret_from_fork+0x31/0x70 [ 10.471780][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.471916][ T11] [ 10.471987][ T11] Last potentially related work creation: [ 10.472126][ T11] kasan_save_stack+0x24/0x50 [ 10.472264][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 10.472403][ T11] insert_work+0x34/0x230 [ 10.472507][ T11] __queue_work+0x5fd/0xa40 [ 10.472646][ T11] queue_delayed_work_on+0x8c/0xa0 [ 10.472783][ T11] __inet_insert_ifa+0x751/0xb10 [ 10.472923][ T11] inetdev_event+0xb18/0xcf0 [ 10.473059][ T11] notifier_call_chain+0xcd/0x150 [ 10.473197][ T11] __dev_notify_flags+0xe6/0x250 [ 10.473335][ T11] dev_change_flags+0xec/0x160 [ 10.473474][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 10.473611][ T11] rtnl_newlink+0x6de/0xa80 [ 10.473750][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 10.473887][ T11] netlink_rcv_skb+0x130/0x360 [ 10.474026][ T11] netlink_unicast+0x44b/0x710 [ 10.474173][ T11] netlink_sendmsg+0x723/0xbe0 [ 10.474314][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 10.474456][ T11] ___sys_sendmsg+0xee/0x170 [ 10.474594][ T11] __sys_sendmsg+0x109/0x1a0 [ 10.474734][ T11] do_syscall_64+0xc1/0x1d0 [ 10.474872][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.475045][ T11] [ 10.475121][ T11] The buggy address belongs to the object at ffff8880051b0040 [ 10.475121][ T11] which belongs to the cache net_namespace of size 6528 [ 10.475485][ T11] The buggy address is located 184 bytes inside of [ 10.475485][ T11] freed 6528-byte region [ffff8880051b0040, ffff8880051b19c0) [ 10.475815][ T11] [ 10.475887][ T11] The buggy address belongs to the physical page: [ 10.476054][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880051b5140 pfn:0x51b0 [ 10.476328][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.476536][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.476719][ T11] page_type: f5(slab) [ 10.476829][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 10.477075][ T11] raw: ffff8880051b5140 0000000000040003 00000001f5000000 0000000000000000 [ 10.477320][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 10.477564][ T11] head: ffff8880051b5140 0000000000040003 00000001f5000000 0000000000000000 [ 10.477808][ T11] head: 0080000000000003 ffffea0000146c01 ffffffffffffffff 0000000000000000 [ 10.478049][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.478290][ T11] page dumped because: kasan: bad access detected [ 10.478459][ T11] [ 10.478527][ T11] Memory state around the buggy address: [ 10.478659][ T11] ffff8880051aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 10.478858][ T11] ffff8880051b0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.479058][ T11] >ffff8880051b0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.479254][ T11] ^ [ 10.479454][ T11] ffff8880051b0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.479656][ T11] ffff8880051b0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.479860][ T11] ================================================================== [ 10.480148][ T11] Disabling lock debugging due to kernel taint