[ 13.429979][ T251] tun: Universal TUN/TAP device driver, 1.6 [ 18.537176][ T281] packetdrill (281) used greatest stack depth: 24376 bytes left [ 18.590582][ T11] ================================================================== [ 18.590814][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 18.591008][ T11] Read of size 8 at addr ffff8880025100f8 by task kworker/u16:0/11 [ 18.591190][ T11] [ 18.591259][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 18.591454][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.591616][ T11] Workqueue: netns cleanup_net [ 18.591752][ T11] Call Trace: [ 18.591850][ T11] [ 18.591921][ T11] dump_stack_lvl+0x82/0xd0 [ 18.592051][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 18.592215][ T11] ? cleanup_net+0x932/0xa40 [ 18.592347][ T11] print_report+0xb4/0x270 [ 18.592477][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 18.592604][ T11] kasan_report+0xbd/0xf0 [ 18.592701][ T11] ? cleanup_net+0x932/0xa40 [ 18.592828][ T11] cleanup_net+0x932/0xa40 [ 18.592957][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.593089][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 18.593214][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 18.593346][ T11] ? lock_acquire+0x32/0xc0 [ 18.593471][ T11] ? process_one_work+0xe0b/0x16d0 [ 18.593597][ T11] process_one_work+0xe55/0x16d0 [ 18.593724][ T11] ? __pfx___lock_release+0x10/0x10 [ 18.593850][ T11] ? __pfx_process_one_work+0x10/0x10 [ 18.593977][ T11] ? assign_work+0x16c/0x240 [ 18.594112][ T11] worker_thread+0x58c/0xce0 [ 18.594246][ T11] ? __pfx_worker_thread+0x10/0x10 [ 18.594373][ T11] kthread+0x28a/0x350 [ 18.594470][ T11] ? __pfx_kthread+0x10/0x10 [ 18.594594][ T11] ret_from_fork+0x31/0x70 [ 18.594719][ T11] ? __pfx_kthread+0x10/0x10 [ 18.594842][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.594974][ T11] [ 18.595069][ T11] [ 18.595135][ T11] Allocated by task 257: [ 18.595235][ T11] kasan_save_stack+0x24/0x50 [ 18.595361][ T11] kasan_save_track+0x14/0x30 [ 18.595487][ T11] __kasan_slab_alloc+0x59/0x70 [ 18.595612][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.595737][ T11] copy_net_ns+0xc6/0x340 [ 18.595833][ T11] create_new_namespaces+0x35f/0x920 [ 18.595960][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 18.596088][ T11] ksys_unshare+0x2a9/0x660 [ 18.596213][ T11] __x64_sys_unshare+0x31/0x40 [ 18.596337][ T11] do_syscall_64+0xc1/0x1d0 [ 18.596464][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.596620][ T11] [ 18.596684][ T11] Freed by task 11: [ 18.596776][ T11] kasan_save_stack+0x24/0x50 [ 18.596902][ T11] kasan_save_track+0x14/0x30 [ 18.597025][ T11] kasan_save_free_info+0x3b/0x60 [ 18.597156][ T11] __kasan_slab_free+0x38/0x50 [ 18.597283][ T11] kmem_cache_free+0xf8/0x330 [ 18.597409][ T11] cleanup_net+0x5a8/0xa40 [ 18.597534][ T11] process_one_work+0xe55/0x16d0 [ 18.597659][ T11] worker_thread+0x58c/0xce0 [ 18.597783][ T11] kthread+0x28a/0x350 [ 18.597878][ T11] ret_from_fork+0x31/0x70 [ 18.598003][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.598131][ T11] [ 18.598195][ T11] Last potentially related work creation: [ 18.598320][ T11] kasan_save_stack+0x24/0x50 [ 18.598450][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 18.598576][ T11] insert_work+0x34/0x230 [ 18.598671][ T11] __queue_work+0x5fd/0xa40 [ 18.598797][ T11] queue_delayed_work_on+0x8c/0xa0 [ 18.598924][ T11] __inet_insert_ifa+0x751/0xb10 [ 18.599056][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 18.599183][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 18.599310][ T11] netlink_rcv_skb+0x130/0x360 [ 18.599440][ T11] netlink_unicast+0x44b/0x710 [ 18.599565][ T11] netlink_sendmsg+0x723/0xbe0 [ 18.599690][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 18.599817][ T11] ___sys_sendmsg+0xee/0x170 [ 18.599945][ T11] __sys_sendmsg+0x109/0x1a0 [ 18.600074][ T11] do_syscall_64+0xc1/0x1d0 [ 18.600201][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.600356][ T11] [ 18.600421][ T11] The buggy address belongs to the object at ffff888002510040 [ 18.600421][ T11] which belongs to the cache net_namespace of size 6592 [ 18.600749][ T11] The buggy address is located 184 bytes inside of [ 18.600749][ T11] freed 6592-byte region [ffff888002510040, ffff888002511a00) [ 18.601053][ T11] [ 18.601117][ T11] The buggy address belongs to the physical page: [ 18.601268][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880025136c0 pfn:0x2510 [ 18.601519][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.601706][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.601870][ T11] page_type: f5(slab) [ 18.601971][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 18.602191][ T11] raw: ffff8880025136c0 0000000000040002 00000001f5000000 0000000000000000 [ 18.602410][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 18.602630][ T11] head: ffff8880025136c0 0000000000040002 00000001f5000000 0000000000000000 [ 18.602850][ T11] head: 0080000000000003 ffffea0000094401 ffffffffffffffff 0000000000000000 [ 18.603071][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.603286][ T11] page dumped because: kasan: bad access detected [ 18.603442][ T11] [ 18.603506][ T11] Memory state around the buggy address: [ 18.603632][ T11] ffff88800250ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.603813][ T11] ffff888002510000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.603994][ T11] >ffff888002510080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.604184][ T11] ^ [ 18.604369][ T11] ffff888002510100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.604547][ T11] ffff888002510180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.604723][ T11] ================================================================== [ 18.604923][ T11] Disabling lock debugging due to kernel taint