[ 15.296512][ T11] ================================================================== [ 15.296871][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 15.297170][ T11] Read of size 8 at addr ffff88800b7f80f8 by task kworker/u16:0/11 [ 15.297458][ T11] [ 15.297564][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 15.297873][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.298131][ T11] Workqueue: netns cleanup_net [ 15.298351][ T11] Call Trace: [ 15.298514][ T11] [ 15.298626][ T11] dump_stack_lvl+0x82/0xd0 [ 15.298839][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 15.299104][ T11] ? cleanup_net+0x932/0xa40 [ 15.299318][ T11] print_report+0xb4/0x270 [ 15.299525][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 15.299732][ T11] kasan_report+0xbd/0xf0 [ 15.299891][ T11] ? cleanup_net+0x932/0xa40 [ 15.300107][ T11] cleanup_net+0x932/0xa40 [ 15.300317][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.300529][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 15.300730][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 15.300929][ T11] ? lock_acquire+0x32/0xc0 [ 15.301129][ T11] ? process_one_work+0xe0b/0x16d0 [ 15.301335][ T11] process_one_work+0xe55/0x16d0 [ 15.301477][ T11] ? __pfx___lock_release+0x10/0x10 [ 15.301620][ T11] ? __pfx_process_one_work+0x10/0x10 [ 15.301772][ T11] ? assign_work+0x16c/0x240 [ 15.301954][ T11] worker_thread+0x58c/0xce0 [ 15.302092][ T11] ? __pfx_worker_thread+0x10/0x10 [ 15.302221][ T11] kthread+0x28a/0x350 [ 15.302323][ T11] ? __pfx_kthread+0x10/0x10 [ 15.302448][ T11] ret_from_fork+0x31/0x70 [ 15.302570][ T11] ? __pfx_kthread+0x10/0x10 [ 15.302710][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.302853][ T11] [ 15.302953][ T11] [ 15.303024][ T11] Allocated by task 224: [ 15.303118][ T11] kasan_save_stack+0x24/0x50 [ 15.303252][ T11] kasan_save_track+0x14/0x30 [ 15.303374][ T11] __kasan_slab_alloc+0x59/0x70 [ 15.303497][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.303623][ T11] copy_net_ns+0xc6/0x340 [ 15.303749][ T11] create_new_namespaces+0x35f/0x920 [ 15.303874][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 15.303997][ T11] ksys_unshare+0x2a9/0x660 [ 15.304119][ T11] __x64_sys_unshare+0x31/0x40 [ 15.304244][ T11] do_syscall_64+0xc1/0x1d0 [ 15.304385][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.304542][ T11] [ 15.304606][ T11] Freed by task 11: [ 15.304714][ T11] kasan_save_stack+0x24/0x50 [ 15.304855][ T11] kasan_save_track+0x14/0x30 [ 15.304979][ T11] kasan_save_free_info+0x3b/0x60 [ 15.305104][ T11] __kasan_slab_free+0x38/0x50 [ 15.305237][ T11] kmem_cache_free+0xf8/0x330 [ 15.305370][ T11] cleanup_net+0x5a8/0xa40 [ 15.305494][ T11] process_one_work+0xe55/0x16d0 [ 15.305625][ T11] worker_thread+0x58c/0xce0 [ 15.305805][ T11] kthread+0x28a/0x350 [ 15.305909][ T11] ret_from_fork+0x31/0x70 [ 15.306047][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.306185][ T11] [ 15.306256][ T11] Last potentially related work creation: [ 15.306393][ T11] kasan_save_stack+0x24/0x50 [ 15.306533][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 15.306675][ T11] insert_work+0x34/0x230 [ 15.306783][ T11] __queue_work+0x5fd/0xa40 [ 15.306923][ T11] queue_delayed_work_on+0x8c/0xa0 [ 15.307064][ T11] __inet_insert_ifa+0x751/0xb10 [ 15.307206][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 15.307343][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 15.307481][ T11] netlink_rcv_skb+0x130/0x360 [ 15.307623][ T11] netlink_unicast+0x44b/0x710 [ 15.307772][ T11] netlink_sendmsg+0x723/0xbe0 [ 15.307912][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 15.308052][ T11] ___sys_sendmsg+0xee/0x170 [ 15.308192][ T11] __sys_sendmsg+0x109/0x1a0 [ 15.308330][ T11] do_syscall_64+0xc1/0x1d0 [ 15.308472][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.308645][ T11] [ 15.308730][ T11] The buggy address belongs to the object at ffff88800b7f8040 [ 15.308730][ T11] which belongs to the cache net_namespace of size 5696 [ 15.309116][ T11] The buggy address is located 184 bytes inside of [ 15.309116][ T11] freed 5696-byte region [ffff88800b7f8040, ffff88800b7f9680) [ 15.309412][ T11] [ 15.309477][ T11] The buggy address belongs to the physical page: [ 15.309628][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b7fafc0 pfn:0xb7f8 [ 15.309909][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.310112][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.310284][ T11] page_type: f5(slab) [ 15.310385][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 15.310630][ T11] raw: ffff88800b7fafc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.310865][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 15.311108][ T11] head: ffff88800b7fafc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.311359][ T11] head: 0080000000000003 ffffea00002dfe01 ffffffffffffffff 0000000000000000 [ 15.311606][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.311842][ T11] page dumped because: kasan: bad access detected [ 15.312005][ T11] [ 15.312071][ T11] Memory state around the buggy address: [ 15.312192][ T11] ffff88800b7f7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 15.312375][ T11] ffff88800b7f8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.312569][ T11] >ffff88800b7f8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.312755][ T11] ^ [ 15.312937][ T11] ffff88800b7f8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.313116][ T11] ffff88800b7f8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.313307][ T11] ================================================================== [ 15.313562][ T11] Disabling lock debugging due to kernel taint