[ 16.338267][ T11] ================================================================== [ 16.338576][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 16.338825][ T11] Read of size 8 at addr ffff88800b5900f8 by task kworker/u16:0/11 [ 16.339058][ T11] [ 16.339134][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 16.339328][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 16.339498][ T11] Workqueue: netns cleanup_net [ 16.339637][ T11] Call Trace: [ 16.339736][ T11] [ 16.339811][ T11] dump_stack_lvl+0x82/0xd0 [ 16.339946][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 16.340117][ T11] ? cleanup_net+0x932/0xa40 [ 16.340253][ T11] print_report+0xb4/0x270 [ 16.340389][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 16.340521][ T11] kasan_report+0xbd/0xf0 [ 16.340651][ T11] ? cleanup_net+0x932/0xa40 [ 16.340845][ T11] cleanup_net+0x932/0xa40 [ 16.341006][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 16.341176][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 16.341340][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 16.341506][ T11] ? lock_acquire+0x32/0xc0 [ 16.341673][ T11] ? process_one_work+0xe0b/0x16d0 [ 16.341845][ T11] process_one_work+0xe55/0x16d0 [ 16.342008][ T11] ? __pfx___lock_release+0x10/0x10 [ 16.342175][ T11] ? __pfx_process_one_work+0x10/0x10 [ 16.342340][ T11] ? assign_work+0x16c/0x240 [ 16.342508][ T11] worker_thread+0x58c/0xce0 [ 16.342677][ T11] ? __pfx_worker_thread+0x10/0x10 [ 16.342843][ T11] kthread+0x28a/0x350 [ 16.342969][ T11] ? __pfx_kthread+0x10/0x10 [ 16.343140][ T11] ret_from_fork+0x31/0x70 [ 16.343306][ T11] ? __pfx_kthread+0x10/0x10 [ 16.343468][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.343642][ T11] [ 16.343771][ T11] [ 16.343856][ T11] Allocated by task 223: [ 16.343979][ T11] kasan_save_stack+0x24/0x50 [ 16.344149][ T11] kasan_save_track+0x14/0x30 [ 16.344313][ T11] __kasan_slab_alloc+0x59/0x70 [ 16.344477][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 16.344643][ T11] copy_net_ns+0xc6/0x340 [ 16.344763][ T11] create_new_namespaces+0x35f/0x920 [ 16.344927][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 16.345093][ T11] ksys_unshare+0x2a9/0x660 [ 16.345254][ T11] __x64_sys_unshare+0x31/0x40 [ 16.345416][ T11] do_syscall_64+0xc1/0x1d0 [ 16.345582][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.345840][ T11] [ 16.345926][ T11] Freed by task 11: [ 16.346058][ T11] kasan_save_stack+0x24/0x50 [ 16.346229][ T11] kasan_save_track+0x14/0x30 [ 16.346393][ T11] kasan_save_free_info+0x3b/0x60 [ 16.346557][ T11] __kasan_slab_free+0x38/0x50 [ 16.346719][ T11] kmem_cache_free+0xf8/0x330 [ 16.346884][ T11] cleanup_net+0x5a8/0xa40 [ 16.347047][ T11] process_one_work+0xe55/0x16d0 [ 16.347214][ T11] worker_thread+0x58c/0xce0 [ 16.347375][ T11] kthread+0x28a/0x350 [ 16.347496][ T11] ret_from_fork+0x31/0x70 [ 16.347659][ T11] ret_from_fork_asm+0x1a/0x30 [ 16.347825][ T11] [ 16.347909][ T11] Last potentially related work creation: [ 16.348075][ T11] kasan_save_stack+0x24/0x50 [ 16.348240][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 16.348404][ T11] insert_work+0x34/0x230 [ 16.348530][ T11] __queue_work+0x5fd/0xa40 [ 16.348697][ T11] queue_delayed_work_on+0x8c/0xa0 [ 16.348864][ T11] __inet_insert_ifa+0x751/0xb10 [ 16.349066][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 16.349268][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 16.349457][ T11] netlink_rcv_skb+0x130/0x360 [ 16.349643][ T11] netlink_unicast+0x44b/0x710 [ 16.349829][ T11] netlink_sendmsg+0x723/0xbe0 [ 16.350046][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 16.350241][ T11] ___sys_sendmsg+0xee/0x170 [ 16.350462][ T11] __sys_sendmsg+0x109/0x1a0 [ 16.350672][ T11] do_syscall_64+0xc1/0x1d0 [ 16.350883][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 16.351140][ T11] [ 16.351244][ T11] The buggy address belongs to the object at ffff88800b590040 [ 16.351244][ T11] which belongs to the cache net_namespace of size 5696 [ 16.351762][ T11] The buggy address is located 184 bytes inside of [ 16.351762][ T11] freed 5696-byte region [ffff88800b590040, ffff88800b591680) [ 16.352269][ T11] [ 16.352389][ T11] The buggy address belongs to the physical page: [ 16.352640][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b592fc0 pfn:0xb590 [ 16.353104][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 16.353398][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 16.353669][ T11] page_type: f5(slab) [ 16.353837][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.354211][ T11] raw: ffff88800b592fc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.354463][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 16.354782][ T11] head: ffff88800b592fc0 0000000000050002 00000001f5000000 0000000000000000 [ 16.355018][ T11] head: 0080000000000003 ffffea00002d6401 ffffffffffffffff 0000000000000000 [ 16.355245][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 16.355472][ T11] page dumped because: kasan: bad access detected [ 16.355642][ T11] [ 16.355712][ T11] Memory state around the buggy address: [ 16.355839][ T11] ffff88800b58ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.356093][ T11] ffff88800b590000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 16.356290][ T11] >ffff88800b590080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.356564][ T11] ^ [ 16.356824][ T11] ffff88800b590100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.357013][ T11] ffff88800b590180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 16.357261][ T11] ================================================================== [ 16.357552][ T11] Disabling lock debugging due to kernel taint