[ 53.670546][ T68] ================================================================== [ 53.670894][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 53.671194][ T68] Read of size 8 at addr ffff88800be680f8 by task kworker/u16:1/68 [ 53.671483][ T68] [ 53.671595][ T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 53.671913][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 53.672137][ T68] Workqueue: netns cleanup_net [ 53.672365][ T68] Call Trace: [ 53.672526][ T68] [ 53.672635][ T68] dump_stack_lvl+0x82/0xd0 [ 53.672857][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 53.673124][ T68] ? cleanup_net+0x932/0xa40 [ 53.673323][ T68] print_report+0xb4/0x270 [ 53.673525][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 53.673729][ T68] kasan_report+0xbd/0xf0 [ 53.673889][ T68] ? cleanup_net+0x932/0xa40 [ 53.674099][ T68] cleanup_net+0x932/0xa40 [ 53.674302][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.674527][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 53.674737][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 53.674949][ T68] ? lock_acquire+0x32/0xc0 [ 53.675154][ T68] ? process_one_work+0xe0b/0x16d0 [ 53.675369][ T68] process_one_work+0xe55/0x16d0 [ 53.675582][ T68] ? __pfx___lock_release+0x10/0x10 [ 53.675793][ T68] ? __pfx_process_one_work+0x10/0x10 [ 53.676007][ T68] ? assign_work+0x16c/0x240 [ 53.676225][ T68] worker_thread+0x58c/0xce0 [ 53.676439][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 53.676703][ T68] ? __pfx_worker_thread+0x10/0x10 [ 53.676910][ T68] ? __pfx_worker_thread+0x10/0x10 [ 53.677121][ T68] kthread+0x28a/0x350 [ 53.677281][ T68] ? __pfx_kthread+0x10/0x10 [ 53.677483][ T68] ret_from_fork+0x31/0x70 [ 53.677690][ T68] ? __pfx_kthread+0x10/0x10 [ 53.677897][ T68] ret_from_fork_asm+0x1a/0x30 [ 53.678112][ T68] [ 53.678272][ T68] [ 53.678376][ T68] Allocated by task 851: [ 53.678528][ T68] kasan_save_stack+0x24/0x50 [ 53.678740][ T68] kasan_save_track+0x14/0x30 [ 53.678945][ T68] __kasan_slab_alloc+0x59/0x70 [ 53.679147][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 53.679364][ T68] copy_net_ns+0xc6/0x340 [ 53.679529][ T68] create_new_namespaces+0x35f/0x920 [ 53.679738][ T68] unshare_nsproxy_namespaces+0x8d/0x130 [ 53.679944][ T68] ksys_unshare+0x2a9/0x660 [ 53.680154][ T68] __x64_sys_unshare+0x31/0x40 [ 53.680357][ T68] do_syscall_64+0xc1/0x1d0 [ 53.680565][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.680819][ T68] [ 53.680929][ T68] Freed by task 68: [ 53.681080][ T68] kasan_save_stack+0x24/0x50 [ 53.681305][ T68] kasan_save_track+0x14/0x30 [ 53.681509][ T68] kasan_save_free_info+0x3b/0x60 [ 53.681715][ T68] __kasan_slab_free+0x38/0x50 [ 53.681918][ T68] kmem_cache_free+0xf8/0x330 [ 53.682116][ T68] cleanup_net+0x5a8/0xa40 [ 53.682320][ T68] process_one_work+0xe55/0x16d0 [ 53.682526][ T68] worker_thread+0x58c/0xce0 [ 53.682732][ T68] kthread+0x28a/0x350 [ 53.682892][ T68] ret_from_fork+0x31/0x70 [ 53.683093][ T68] ret_from_fork_asm+0x1a/0x30 [ 53.683296][ T68] [ 53.683402][ T68] Last potentially related work creation: [ 53.683604][ T68] kasan_save_stack+0x24/0x50 [ 53.683816][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 53.684022][ T68] insert_work+0x34/0x230 [ 53.684178][ T68] __queue_work+0x5fd/0xa40 [ 53.684387][ T68] queue_delayed_work_on+0x8c/0xa0 [ 53.684599][ T68] __inet_insert_ifa+0x751/0xb10 [ 53.684745][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 53.684886][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 53.685035][ T68] netlink_rcv_skb+0x130/0x360 [ 53.685185][ T68] netlink_unicast+0x44b/0x710 [ 53.685333][ T68] netlink_sendmsg+0x723/0xbe0 [ 53.685508][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 53.685720][ T68] ___sys_sendmsg+0xee/0x170 [ 53.685882][ T68] __sys_sendmsg+0x109/0x1a0 [ 53.686077][ T68] do_syscall_64+0xc1/0x1d0 [ 53.686285][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.686542][ T68] [ 53.686647][ T68] The buggy address belongs to the object at ffff88800be68040 [ 53.686647][ T68] which belongs to the cache net_namespace of size 5696 [ 53.687149][ T68] The buggy address is located 184 bytes inside of [ 53.687149][ T68] freed 5696-byte region [ffff88800be68040, ffff88800be69680) [ 53.687627][ T68] [ 53.687729][ T68] The buggy address belongs to the physical page: [ 53.687974][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800be6c780 pfn:0xbe68 [ 53.688394][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 53.688709][ T68] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 53.688981][ T68] page_type: f5(slab) [ 53.689150][ T68] raw: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 53.689532][ T68] raw: ffff88800be6c780 0000000000050003 00000001f5000000 0000000000000000 [ 53.689894][ T68] head: 0080000000000240 ffff888001927240 ffff88800192a088 ffff88800192a088 [ 53.690265][ T68] head: ffff88800be6c780 0000000000050003 00000001f5000000 0000000000000000 [ 53.690616][ T68] head: 0080000000000003 ffffea00002f9a01 ffffffffffffffff 0000000000000000 [ 53.690978][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 53.691345][ T68] page dumped because: kasan: bad access detected [ 53.691597][ T68] [ 53.691709][ T68] Memory state around the buggy address: [ 53.691907][ T68] ffff88800be67f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 53.692196][ T68] ffff88800be68000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 53.692538][ T68] >ffff88800be68080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.692831][ T68] ^ [ 53.693125][ T68] ffff88800be68100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.693409][ T68] ffff88800be68180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.693705][ T68] ================================================================== [ 53.694035][ T68] Disabling lock debugging due to kernel taint