[ 24.632795][ T265] packetdrill (265) used greatest stack depth: 23432 bytes left [ 24.707228][ T11] ================================================================== [ 24.707530][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 24.707782][ T11] Read of size 8 at addr ffff88800b1f00f8 by task kworker/u16:0/11 [ 24.708012][ T11] [ 24.708095][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 24.708339][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 24.708567][ T11] Workqueue: netns cleanup_net [ 24.708748][ T11] Call Trace: [ 24.708878][ T11] [ 24.708974][ T11] dump_stack_lvl+0x82/0xd0 [ 24.709141][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 24.709350][ T11] ? cleanup_net+0x932/0xa40 [ 24.709523][ T11] print_report+0xb4/0x270 [ 24.709685][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 24.709841][ T11] kasan_report+0xbd/0xf0 [ 24.709958][ T11] ? cleanup_net+0x932/0xa40 [ 24.710130][ T11] cleanup_net+0x932/0xa40 [ 24.710297][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 24.710450][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 24.710613][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 24.710760][ T11] ? lock_acquire+0x32/0xc0 [ 24.710910][ T11] ? process_one_work+0xe0b/0x16d0 [ 24.711096][ T11] process_one_work+0xe55/0x16d0 [ 24.711269][ T11] ? __pfx___lock_release+0x10/0x10 [ 24.711419][ T11] ? __pfx_process_one_work+0x10/0x10 [ 24.711586][ T11] ? assign_work+0x16c/0x240 [ 24.711748][ T11] worker_thread+0x58c/0xce0 [ 24.711913][ T11] ? __pfx_worker_thread+0x10/0x10 [ 24.712067][ T11] kthread+0x28a/0x350 [ 24.712190][ T11] ? __pfx_kthread+0x10/0x10 [ 24.712355][ T11] ret_from_fork+0x31/0x70 [ 24.712516][ T11] ? __pfx_kthread+0x10/0x10 [ 24.712650][ T11] ret_from_fork_asm+0x1a/0x30 [ 24.712797][ T11] [ 24.712912][ T11] [ 24.713012][ T11] Allocated by task 223: [ 24.713140][ T11] kasan_save_stack+0x24/0x50 [ 24.713279][ T11] kasan_save_track+0x14/0x30 [ 24.713417][ T11] __kasan_slab_alloc+0x59/0x70 [ 24.713559][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 24.713714][ T11] copy_net_ns+0xc6/0x340 [ 24.713825][ T11] create_new_namespaces+0x35f/0x920 [ 24.713968][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 24.714108][ T11] ksys_unshare+0x2a9/0x660 [ 24.714267][ T11] __x64_sys_unshare+0x31/0x40 [ 24.714427][ T11] do_syscall_64+0xc1/0x1d0 [ 24.714581][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 24.714793][ T11] [ 24.714889][ T11] Freed by task 11: [ 24.715008][ T11] kasan_save_stack+0x24/0x50 [ 24.715175][ T11] kasan_save_track+0x14/0x30 [ 24.715328][ T11] kasan_save_free_info+0x3b/0x60 [ 24.715477][ T11] __kasan_slab_free+0x38/0x50 [ 24.715632][ T11] kmem_cache_free+0xf8/0x330 [ 24.715810][ T11] cleanup_net+0x5a8/0xa40 [ 24.715957][ T11] process_one_work+0xe55/0x16d0 [ 24.716105][ T11] worker_thread+0x58c/0xce0 [ 24.716266][ T11] kthread+0x28a/0x350 [ 24.716382][ T11] ret_from_fork+0x31/0x70 [ 24.716531][ T11] ret_from_fork_asm+0x1a/0x30 [ 24.716685][ T11] [ 24.716766][ T11] Last potentially related work creation: [ 24.716941][ T11] kasan_save_stack+0x24/0x50 [ 24.717113][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 24.717280][ T11] insert_work+0x34/0x230 [ 24.717408][ T11] __queue_work+0x5fd/0xa40 [ 24.717558][ T11] queue_delayed_work_on+0x8c/0xa0 [ 24.717713][ T11] __inet_insert_ifa+0x751/0xb10 [ 24.717858][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 24.718010][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 24.718162][ T11] netlink_rcv_skb+0x130/0x360 [ 24.718308][ T11] netlink_unicast+0x44b/0x710 [ 24.718443][ T11] netlink_sendmsg+0x723/0xbe0 [ 24.718593][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 24.718756][ T11] ___sys_sendmsg+0xee/0x170 [ 24.718907][ T11] __sys_sendmsg+0x109/0x1a0 [ 24.719052][ T11] do_syscall_64+0xc1/0x1d0 [ 24.719208][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 24.719404][ T11] [ 24.719484][ T11] The buggy address belongs to the object at ffff88800b1f0040 [ 24.719484][ T11] which belongs to the cache net_namespace of size 5696 [ 24.719907][ T11] The buggy address is located 184 bytes inside of [ 24.719907][ T11] freed 5696-byte region [ffff88800b1f0040, ffff88800b1f1680) [ 24.720287][ T11] [ 24.720380][ T11] The buggy address belongs to the physical page: [ 24.720562][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b1f2fc0 pfn:0xb1f0 [ 24.720870][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 24.721140][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 24.721333][ T11] page_type: f5(slab) [ 24.721463][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 24.721777][ T11] raw: ffff88800b1f2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 24.722040][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 24.722310][ T11] head: ffff88800b1f2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 24.722560][ T11] head: 0080000000000003 ffffea00002c7c01 ffffffffffffffff 0000000000000000 [ 24.722814][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 24.723087][ T11] page dumped because: kasan: bad access detected [ 24.723276][ T11] [ 24.723354][ T11] Memory state around the buggy address: [ 24.723518][ T11] ffff88800b1eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.723753][ T11] ffff88800b1f0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.723983][ T11] >ffff88800b1f0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.724218][ T11] ^ [ 24.724432][ T11] ffff88800b1f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.724644][ T11] ffff88800b1f0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.724895][ T11] ================================================================== [ 24.726205][ T11] Disabling lock debugging due to kernel taint