[ 15.050350][ T304] netem: version 1.3 [ 126.403153][ T11] ================================================================== [ 126.403381][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 126.403574][ T11] Read of size 8 at addr ffff88800ae780f8 by task kworker/u16:0/11 [ 126.403758][ T11] [ 126.403823][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 126.404011][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 126.404175][ T11] Workqueue: netns cleanup_net [ 126.404308][ T11] Call Trace: [ 126.404407][ T11] [ 126.404473][ T11] dump_stack_lvl+0x82/0xd0 [ 126.404603][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 126.404766][ T11] ? cleanup_net+0x932/0xa40 [ 126.404896][ T11] print_report+0xb4/0x270 [ 126.405024][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 126.405157][ T11] kasan_report+0xbd/0xf0 [ 126.405254][ T11] ? cleanup_net+0x932/0xa40 [ 126.405385][ T11] cleanup_net+0x932/0xa40 [ 126.405509][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 126.405644][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 126.405770][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 126.405896][ T11] ? lock_acquire+0x32/0xc0 [ 126.406025][ T11] ? process_one_work+0xe0b/0x16d0 [ 126.406152][ T11] process_one_work+0xe55/0x16d0 [ 126.406280][ T11] ? __pfx___lock_release+0x10/0x10 [ 126.406407][ T11] ? __pfx_process_one_work+0x10/0x10 [ 126.406533][ T11] ? assign_work+0x16c/0x240 [ 126.406657][ T11] worker_thread+0x58c/0xce0 [ 126.406792][ T11] ? __pfx_worker_thread+0x10/0x10 [ 126.406916][ T11] kthread+0x28a/0x350 [ 126.407015][ T11] ? __pfx_kthread+0x10/0x10 [ 126.407142][ T11] ret_from_fork+0x31/0x70 [ 126.407268][ T11] ? __pfx_kthread+0x10/0x10 [ 126.407410][ T11] ret_from_fork_asm+0x1a/0x30 [ 126.407538][ T11] [ 126.407632][ T11] [ 126.407696][ T11] Allocated by task 247: [ 126.407792][ T11] kasan_save_stack+0x24/0x50 [ 126.407919][ T11] kasan_save_track+0x14/0x30 [ 126.408042][ T11] __kasan_slab_alloc+0x59/0x70 [ 126.408163][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 126.408290][ T11] copy_net_ns+0xc6/0x340 [ 126.408384][ T11] create_new_namespaces+0x35f/0x920 [ 126.408511][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 126.408633][ T11] ksys_unshare+0x2a9/0x660 [ 126.408759][ T11] __x64_sys_unshare+0x31/0x40 [ 126.408883][ T11] do_syscall_64+0xc1/0x1d0 [ 126.409011][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.409175][ T11] [ 126.409239][ T11] Freed by task 11: [ 126.409330][ T11] kasan_save_stack+0x24/0x50 [ 126.409457][ T11] kasan_save_track+0x14/0x30 [ 126.409580][ T11] kasan_save_free_info+0x3b/0x60 [ 126.409701][ T11] __kasan_slab_free+0x38/0x50 [ 126.409825][ T11] kmem_cache_free+0xf8/0x330 [ 126.409951][ T11] cleanup_net+0x5a8/0xa40 [ 126.410074][ T11] process_one_work+0xe55/0x16d0 [ 126.410197][ T11] worker_thread+0x58c/0xce0 [ 126.410322][ T11] kthread+0x28a/0x350 [ 126.410416][ T11] ret_from_fork+0x31/0x70 [ 126.410539][ T11] ret_from_fork_asm+0x1a/0x30 [ 126.410662][ T11] [ 126.410728][ T11] Last potentially related work creation: [ 126.410854][ T11] kasan_save_stack+0x24/0x50 [ 126.410979][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 126.411103][ T11] insert_work+0x34/0x230 [ 126.411198][ T11] __queue_work+0x5fd/0xa40 [ 126.411323][ T11] queue_delayed_work_on+0x8c/0xa0 [ 126.411447][ T11] __inet_insert_ifa+0x751/0xb10 [ 126.411572][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 126.411698][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 126.411823][ T11] netlink_rcv_skb+0x130/0x360 [ 126.411950][ T11] netlink_unicast+0x44b/0x710 [ 126.412073][ T11] netlink_sendmsg+0x723/0xbe0 [ 126.412195][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 126.412319][ T11] ___sys_sendmsg+0xee/0x170 [ 126.412444][ T11] __sys_sendmsg+0x109/0x1a0 [ 126.412566][ T11] do_syscall_64+0xc1/0x1d0 [ 126.412690][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.412908][ T11] [ 126.412978][ T11] Second to last potentially related work creation: [ 126.413130][ T11] kasan_save_stack+0x24/0x50 [ 126.413258][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 126.413383][ T11] insert_work+0x34/0x230 [ 126.413477][ T11] __queue_work+0x5fd/0xa40 [ 126.413600][ T11] queue_delayed_work_on+0x8c/0xa0 [ 126.413725][ T11] __inet_insert_ifa+0x751/0xb10 [ 126.413917][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 126.414041][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 126.414316][ T11] netlink_rcv_skb+0x130/0x360 [ 126.414444][ T11] netlink_unicast+0x44b/0x710 [ 126.414584][ T11] netlink_sendmsg+0x723/0xbe0 [ 126.414710][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 126.414897][ T11] ___sys_sendmsg+0xee/0x170 [ 126.415022][ T11] __sys_sendmsg+0x109/0x1a0 [ 126.415148][ T11] do_syscall_64+0xc1/0x1d0 [ 126.415274][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.415425][ T11] [ 126.415488][ T11] The buggy address belongs to the object at ffff88800ae78040 [ 126.415488][ T11] which belongs to the cache net_namespace of size 6080 [ 126.415933][ T11] The buggy address is located 184 bytes inside of [ 126.415933][ T11] freed 6080-byte region [ffff88800ae78040, ffff88800ae79800) [ 126.416243][ T11] [ 126.416307][ T11] The buggy address belongs to the physical page: [ 126.416455][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ae7cc00 pfn:0xae78 [ 126.416701][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 126.416889][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 126.417047][ T11] page_type: f5(slab) [ 126.417151][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 126.417371][ T11] raw: ffff88800ae7cc00 0000000000050003 00000001f5000000 0000000000000000 [ 126.417719][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 126.417936][ T11] head: ffff88800ae7cc00 0000000000050003 00000001f5000000 0000000000000000 [ 126.418157][ T11] head: 0080000000000003 ffffea00002b9e01 ffffffffffffffff 0000000000000000 [ 126.418375][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 126.418590][ T11] page dumped because: kasan: bad access detected [ 126.418743][ T11] [ 126.418806][ T11] Memory state around the buggy address: [ 126.418994][ T11] ffff88800ae77f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 126.419172][ T11] ffff88800ae78000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 126.419348][ T11] >ffff88800ae78080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.419523][ T11] ^ [ 126.419756][ T11] ffff88800ae78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.420001][ T11] ffff88800ae78180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.420175][ T11] ================================================================== [ 126.420368][ T11] Disabling lock debugging due to kernel taint