[ 19.620384][ T11] ================================================================== [ 19.620659][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 19.620894][ T11] Read of size 8 at addr ffff888005df00f8 by task kworker/u16:0/11 [ 19.621116][ T11] [ 19.621196][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 19.621434][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 19.621631][ T11] Workqueue: netns cleanup_net [ 19.621792][ T11] Call Trace: [ 19.621914][ T11] [ 19.621998][ T11] dump_stack_lvl+0x82/0xd0 [ 19.622156][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 19.622363][ T11] ? cleanup_net+0x932/0xa40 [ 19.622531][ T11] print_report+0xb4/0x270 [ 19.622686][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 19.622840][ T11] kasan_report+0xbd/0xf0 [ 19.622961][ T11] ? cleanup_net+0x932/0xa40 [ 19.623117][ T11] cleanup_net+0x932/0xa40 [ 19.623274][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 19.623429][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 19.623585][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 19.623766][ T11] ? lock_acquire+0x32/0xc0 [ 19.623924][ T11] ? process_one_work+0xe0b/0x16d0 [ 19.624084][ T11] process_one_work+0xe55/0x16d0 [ 19.624245][ T11] ? __pfx___lock_release+0x10/0x10 [ 19.624402][ T11] ? __pfx_process_one_work+0x10/0x10 [ 19.624562][ T11] ? assign_work+0x16c/0x240 [ 19.624716][ T11] worker_thread+0x58c/0xce0 [ 19.624874][ T11] ? __pfx_worker_thread+0x10/0x10 [ 19.625033][ T11] kthread+0x28a/0x350 [ 19.625154][ T11] ? __pfx_kthread+0x10/0x10 [ 19.625310][ T11] ret_from_fork+0x31/0x70 [ 19.625468][ T11] ? __pfx_kthread+0x10/0x10 [ 19.625626][ T11] ret_from_fork_asm+0x1a/0x30 [ 19.625791][ T11] [ 19.625912][ T11] [ 19.625992][ T11] Allocated by task 221: [ 19.626109][ T11] kasan_save_stack+0x24/0x50 [ 19.626268][ T11] kasan_save_track+0x14/0x30 [ 19.626421][ T11] __kasan_slab_alloc+0x59/0x70 [ 19.626572][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 19.626726][ T11] copy_net_ns+0xc6/0x340 [ 19.626845][ T11] create_new_namespaces+0x35f/0x920 [ 19.627004][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 19.627159][ T11] ksys_unshare+0x2a9/0x660 [ 19.627311][ T11] __x64_sys_unshare+0x31/0x40 [ 19.627465][ T11] do_syscall_64+0xc1/0x1d0 [ 19.627623][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.627843][ T11] [ 19.627920][ T11] Freed by task 11: [ 19.628034][ T11] kasan_save_stack+0x24/0x50 [ 19.628191][ T11] kasan_save_track+0x14/0x30 [ 19.628349][ T11] kasan_save_free_info+0x3b/0x60 [ 19.628513][ T11] __kasan_slab_free+0x38/0x50 [ 19.628669][ T11] kmem_cache_free+0xf8/0x330 [ 19.628824][ T11] cleanup_net+0x5a8/0xa40 [ 19.628981][ T11] process_one_work+0xe55/0x16d0 [ 19.629135][ T11] worker_thread+0x58c/0xce0 [ 19.629289][ T11] kthread+0x28a/0x350 [ 19.629409][ T11] ret_from_fork+0x31/0x70 [ 19.629563][ T11] ret_from_fork_asm+0x1a/0x30 [ 19.629734][ T11] [ 19.629818][ T11] Last potentially related work creation: [ 19.629969][ T11] kasan_save_stack+0x24/0x50 [ 19.630137][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 19.630289][ T11] insert_work+0x34/0x230 [ 19.630402][ T11] __queue_work+0x5fd/0xa40 [ 19.630565][ T11] queue_delayed_work_on+0x8c/0xa0 [ 19.630727][ T11] __inet_insert_ifa+0x751/0xb10 [ 19.630878][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 19.631035][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 19.631193][ T11] netlink_rcv_skb+0x130/0x360 [ 19.631355][ T11] netlink_unicast+0x44b/0x710 [ 19.631519][ T11] netlink_sendmsg+0x723/0xbe0 [ 19.631682][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 19.631856][ T11] ___sys_sendmsg+0xee/0x170 [ 19.632019][ T11] __sys_sendmsg+0x109/0x1a0 [ 19.632175][ T11] do_syscall_64+0xc1/0x1d0 [ 19.632338][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.632539][ T11] [ 19.632624][ T11] The buggy address belongs to the object at ffff888005df0040 [ 19.632624][ T11] which belongs to the cache net_namespace of size 5696 [ 19.633045][ T11] The buggy address is located 184 bytes inside of [ 19.633045][ T11] freed 5696-byte region [ffff888005df0040, ffff888005df1680) [ 19.633423][ T11] [ 19.633504][ T11] The buggy address belongs to the physical page: [ 19.633693][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005df2fc0 pfn:0x5df0 [ 19.634017][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 19.634257][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 19.634460][ T11] page_type: f5(slab) [ 19.634585][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 19.634869][ T11] raw: ffff888005df2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 19.635134][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 19.635417][ T11] head: ffff888005df2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 19.635711][ T11] head: 0080000000000003 ffffea0000177c01 ffffffffffffffff 0000000000000000 [ 19.635988][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 19.636261][ T11] page dumped because: kasan: bad access detected [ 19.636455][ T11] [ 19.636535][ T11] Memory state around the buggy address: [ 19.636687][ T11] ffff888005deff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.636920][ T11] ffff888005df0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 19.637155][ T11] >ffff888005df0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.637380][ T11] ^ [ 19.637614][ T11] ffff888005df0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.637845][ T11] ffff888005df0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.638071][ T11] ================================================================== [ 19.638319][ T11] Disabling lock debugging due to kernel taint