[ 14.370278][ T289] ip (289) used greatest stack depth: 23344 bytes left [ 20.159760][ T11] ================================================================== [ 20.159979][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 20.160185][ T11] Read of size 8 at addr ffff8880025d80f8 by task kworker/u16:0/11 [ 20.160373][ T11] [ 20.160441][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 20.160637][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.160805][ T11] Workqueue: netns cleanup_net [ 20.160947][ T11] Call Trace: [ 20.161063][ T11] [ 20.161153][ T11] dump_stack_lvl+0x82/0xd0 [ 20.161300][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 20.161460][ T11] ? cleanup_net+0x932/0xa40 [ 20.161587][ T11] print_report+0xb4/0x270 [ 20.161717][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 20.161841][ T11] kasan_report+0xbd/0xf0 [ 20.161938][ T11] ? cleanup_net+0x932/0xa40 [ 20.162079][ T11] cleanup_net+0x932/0xa40 [ 20.162221][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.162362][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 20.162503][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 20.162645][ T11] ? lock_acquire+0x32/0xc0 [ 20.162780][ T11] ? process_one_work+0xe0b/0x16d0 [ 20.162919][ T11] process_one_work+0xe55/0x16d0 [ 20.163061][ T11] ? __pfx___lock_release+0x10/0x10 [ 20.163202][ T11] ? __pfx_process_one_work+0x10/0x10 [ 20.163373][ T11] ? assign_work+0x16c/0x240 [ 20.163516][ T11] worker_thread+0x58c/0xce0 [ 20.163656][ T11] ? __pfx_worker_thread+0x10/0x10 [ 20.163792][ T11] kthread+0x28a/0x350 [ 20.163904][ T11] ? __pfx_kthread+0x10/0x10 [ 20.164045][ T11] ret_from_fork+0x31/0x70 [ 20.164168][ T11] ? __pfx_kthread+0x10/0x10 [ 20.164293][ T11] ret_from_fork_asm+0x1a/0x30 [ 20.164448][ T11] [ 20.164567][ T11] [ 20.164637][ T11] Allocated by task 255: [ 20.164741][ T11] kasan_save_stack+0x24/0x50 [ 20.164893][ T11] kasan_save_track+0x14/0x30 [ 20.165045][ T11] __kasan_slab_alloc+0x59/0x70 [ 20.165199][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 20.165363][ T11] copy_net_ns+0xc6/0x340 [ 20.165480][ T11] create_new_namespaces+0x35f/0x920 [ 20.165627][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 20.165789][ T11] ksys_unshare+0x2a9/0x660 [ 20.165947][ T11] __x64_sys_unshare+0x31/0x40 [ 20.166094][ T11] do_syscall_64+0xc1/0x1d0 [ 20.166262][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.166454][ T11] [ 20.166553][ T11] Freed by task 11: [ 20.166649][ T11] kasan_save_stack+0x24/0x50 [ 20.166795][ T11] kasan_save_track+0x14/0x30 [ 20.166920][ T11] kasan_save_free_info+0x3b/0x60 [ 20.167071][ T11] __kasan_slab_free+0x38/0x50 [ 20.167208][ T11] kmem_cache_free+0xf8/0x330 [ 20.167350][ T11] cleanup_net+0x5a8/0xa40 [ 20.167483][ T11] process_one_work+0xe55/0x16d0 [ 20.167619][ T11] worker_thread+0x58c/0xce0 [ 20.167751][ T11] kthread+0x28a/0x350 [ 20.167869][ T11] ret_from_fork+0x31/0x70 [ 20.168001][ T11] ret_from_fork_asm+0x1a/0x30 [ 20.168125][ T11] [ 20.168196][ T11] Last potentially related work creation: [ 20.168329][ T11] kasan_save_stack+0x24/0x50 [ 20.168476][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 20.168606][ T11] insert_work+0x34/0x230 [ 20.168705][ T11] __queue_work+0x5fd/0xa40 [ 20.168845][ T11] queue_delayed_work_on+0x8c/0xa0 [ 20.169006][ T11] __inet_insert_ifa+0x751/0xb10 [ 20.169191][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 20.169311][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 20.169435][ T11] netlink_rcv_skb+0x130/0x360 [ 20.169562][ T11] netlink_unicast+0x44b/0x710 [ 20.169688][ T11] netlink_sendmsg+0x723/0xbe0 [ 20.169812][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 20.169936][ T11] ___sys_sendmsg+0xee/0x170 [ 20.170060][ T11] __sys_sendmsg+0x109/0x1a0 [ 20.170186][ T11] do_syscall_64+0xc1/0x1d0 [ 20.170311][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.170464][ T11] [ 20.170528][ T11] Second to last potentially related work creation: [ 20.170713][ T11] kasan_save_stack+0x24/0x50 [ 20.170855][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 20.170994][ T11] insert_work+0x34/0x230 [ 20.171108][ T11] __queue_work+0x5fd/0xa40 [ 20.171247][ T11] queue_delayed_work_on+0x8c/0xa0 [ 20.171396][ T11] __inet_insert_ifa+0x751/0xb10 [ 20.171549][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 20.171681][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 20.171816][ T11] netlink_rcv_skb+0x130/0x360 [ 20.171970][ T11] netlink_unicast+0x44b/0x710 [ 20.172121][ T11] netlink_sendmsg+0x723/0xbe0 [ 20.172260][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 20.172411][ T11] ___sys_sendmsg+0xee/0x170 [ 20.172562][ T11] __sys_sendmsg+0x109/0x1a0 [ 20.172744][ T11] do_syscall_64+0xc1/0x1d0 [ 20.172923][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.173113][ T11] [ 20.173189][ T11] The buggy address belongs to the object at ffff8880025d8040 [ 20.173189][ T11] which belongs to the cache net_namespace of size 6080 [ 20.173597][ T11] The buggy address is located 184 bytes inside of [ 20.173597][ T11] freed 6080-byte region [ffff8880025d8040, ffff8880025d9800) [ 20.174000][ T11] [ 20.174107][ T11] The buggy address belongs to the physical page: [ 20.174286][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880025db2c0 pfn:0x25d8 [ 20.174590][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 20.174807][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 20.174999][ T11] page_type: f5(slab) [ 20.175108][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 20.175372][ T11] raw: ffff8880025db2c0 0000000000050002 00000001f5000000 0000000000000000 [ 20.175614][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 20.175854][ T11] head: ffff8880025db2c0 0000000000050002 00000001f5000000 0000000000000000 [ 20.176111][ T11] head: 0080000000000003 ffffea0000097601 ffffffffffffffff 0000000000000000 [ 20.176338][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 20.176569][ T11] page dumped because: kasan: bad access detected [ 20.176729][ T11] [ 20.176792][ T11] Memory state around the buggy address: [ 20.176934][ T11] ffff8880025d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.177154][ T11] ffff8880025d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 20.177359][ T11] >ffff8880025d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.177549][ T11] ^ [ 20.177754][ T11] ffff8880025d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.177970][ T11] ffff8880025d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.178173][ T11] ================================================================== [ 20.178394][ T11] Disabling lock debugging due to kernel taint [ 204.614048][ T2851] netem: version 1.3 [ 1498.802446][T18822] pm_nl_ctl (18822) used greatest stack depth: 22944 bytes left