[ 60.828594][ T66] ================================================================== [ 60.828828][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 60.829019][ T66] Read of size 8 at addr ffff8880090e80f8 by task kworker/u16:1/66 [ 60.829199][ T66] [ 60.829266][ T66] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 60.829468][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 60.829621][ T66] Workqueue: netns cleanup_net [ 60.829749][ T66] Call Trace: [ 60.829841][ T66] [ 60.829906][ T66] dump_stack_lvl+0x82/0xd0 [ 60.830040][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 60.830195][ T66] ? cleanup_net+0x932/0xa40 [ 60.830319][ T66] print_report+0xb4/0x270 [ 60.830444][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 60.830569][ T66] kasan_report+0xbd/0xf0 [ 60.830664][ T66] ? cleanup_net+0x932/0xa40 [ 60.830789][ T66] cleanup_net+0x932/0xa40 [ 60.830914][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 60.831042][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 60.831164][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 60.831292][ T66] ? lock_acquire+0x32/0xc0 [ 60.831418][ T66] ? process_one_work+0xe0b/0x16d0 [ 60.831552][ T66] process_one_work+0xe55/0x16d0 [ 60.831678][ T66] ? __pfx___lock_release+0x10/0x10 [ 60.831803][ T66] ? __pfx_process_one_work+0x10/0x10 [ 60.831930][ T66] ? assign_work+0x16c/0x240 [ 60.832055][ T66] worker_thread+0x58c/0xce0 [ 60.832183][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 60.832337][ T66] ? __pfx_worker_thread+0x10/0x10 [ 60.832463][ T66] ? __pfx_worker_thread+0x10/0x10 [ 60.832588][ T66] kthread+0x28a/0x350 [ 60.832682][ T66] ? __pfx_kthread+0x10/0x10 [ 60.832806][ T66] ret_from_fork+0x31/0x70 [ 60.832929][ T66] ? __pfx_kthread+0x10/0x10 [ 60.833053][ T66] ret_from_fork_asm+0x1a/0x30 [ 60.833180][ T66] [ 60.833275][ T66] [ 60.833339][ T66] Allocated by task 241: [ 60.833431][ T66] kasan_save_stack+0x24/0x50 [ 60.833558][ T66] kasan_save_track+0x14/0x30 [ 60.833681][ T66] __kasan_slab_alloc+0x59/0x70 [ 60.833804][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 60.833932][ T66] copy_net_ns+0xc6/0x340 [ 60.834024][ T66] create_new_namespaces+0x35f/0x920 [ 60.834152][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 60.834276][ T66] ksys_unshare+0x2a9/0x660 [ 60.834400][ T66] __x64_sys_unshare+0x31/0x40 [ 60.834523][ T66] do_syscall_64+0xc1/0x1d0 [ 60.834651][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 60.834805][ T66] [ 60.834876][ T66] Freed by task 66: [ 60.834970][ T66] kasan_save_stack+0x24/0x50 [ 60.835099][ T66] kasan_save_track+0x14/0x30 [ 60.835227][ T66] kasan_save_free_info+0x3b/0x60 [ 60.835357][ T66] __kasan_slab_free+0x38/0x50 [ 60.835478][ T66] kmem_cache_free+0xf8/0x330 [ 60.835605][ T66] cleanup_net+0x5a8/0xa40 [ 60.835732][ T66] process_one_work+0xe55/0x16d0 [ 60.835857][ T66] worker_thread+0x58c/0xce0 [ 60.835980][ T66] kthread+0x28a/0x350 [ 60.836079][ T66] ret_from_fork+0x31/0x70 [ 60.836203][ T66] ret_from_fork_asm+0x1a/0x30 [ 60.836325][ T66] [ 60.836388][ T66] Last potentially related work creation: [ 60.836514][ T66] kasan_save_stack+0x24/0x50 [ 60.836645][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 60.836767][ T66] insert_work+0x34/0x230 [ 60.836860][ T66] __queue_work+0x5fd/0xa40 [ 60.836982][ T66] queue_delayed_work_on+0x8c/0xa0 [ 60.837105][ T66] __inet_insert_ifa+0x751/0xb10 [ 60.837230][ T66] inetdev_event+0xb18/0xcf0 [ 60.837359][ T66] notifier_call_chain+0xcd/0x150 [ 60.837485][ T66] __dev_notify_flags+0xe6/0x250 [ 60.837613][ T66] dev_change_flags+0xec/0x160 [ 60.837740][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 60.837868][ T66] rtnl_newlink+0x6de/0xa80 [ 60.837996][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 60.838129][ T66] netlink_rcv_skb+0x130/0x360 [ 60.838258][ T66] netlink_unicast+0x44b/0x710 [ 60.838384][ T66] netlink_sendmsg+0x723/0xbe0 [ 60.838521][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 60.838655][ T66] ___sys_sendmsg+0xee/0x170 [ 60.838781][ T66] __sys_sendmsg+0x109/0x1a0 [ 60.838904][ T66] do_syscall_64+0xc1/0x1d0 [ 60.839031][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 60.839187][ T66] [ 60.839251][ T66] The buggy address belongs to the object at ffff8880090e8040 [ 60.839251][ T66] which belongs to the cache net_namespace of size 6080 [ 60.839587][ T66] The buggy address is located 184 bytes inside of [ 60.839587][ T66] freed 6080-byte region [ffff8880090e8040, ffff8880090e9800) [ 60.839878][ T66] [ 60.839942][ T66] The buggy address belongs to the physical page: [ 60.840104][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880090ecc00 pfn:0x90e8 [ 60.840353][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 60.840542][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 60.840703][ T66] page_type: f5(slab) [ 60.840801][ T66] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 60.841030][ T66] raw: ffff8880090ecc00 0000000000050003 00000001f5000000 0000000000000000 [ 60.841249][ T66] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 60.841471][ T66] head: ffff8880090ecc00 0000000000050003 00000001f5000000 0000000000000000 [ 60.841686][ T66] head: 0080000000000003 ffffea0000243a01 ffffffffffffffff 0000000000000000 [ 60.841902][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 60.842115][ T66] page dumped because: kasan: bad access detected [ 60.842265][ T66] [ 60.842326][ T66] Memory state around the buggy address: [ 60.842445][ T66] ffff8880090e7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.842627][ T66] ffff8880090e8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.842798][ T66] >ffff8880090e8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.842974][ T66] ^ [ 60.843150][ T66] ffff8880090e8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.843323][ T66] ffff8880090e8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.843502][ T66] ================================================================== [ 60.843745][ T66] Disabling lock debugging due to kernel taint [ 210.423140][ T4090] netem: version 1.3 [ 1437.019685][T20054] pm_nl_ctl (20054) used greatest stack depth: 22944 bytes left