[ 13.868105][ T271] ipip: IPv4 and MPLS over IPv4 tunneling driver [ 26.076033][ T67] ================================================================== [ 26.076273][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 26.076472][ T67] Read of size 8 at addr ffff88800b4800f8 by task kworker/u16:1/67 [ 26.076668][ T67] [ 26.076732][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 26.076936][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.077097][ T67] Workqueue: netns cleanup_net [ 26.077228][ T67] Call Trace: [ 26.077334][ T67] [ 26.077406][ T67] dump_stack_lvl+0x82/0xd0 [ 26.077539][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 26.077703][ T67] ? cleanup_net+0x932/0xa40 [ 26.077840][ T67] print_report+0xb4/0x270 [ 26.077962][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 26.078091][ T67] kasan_report+0xbd/0xf0 [ 26.078192][ T67] ? cleanup_net+0x932/0xa40 [ 26.078324][ T67] cleanup_net+0x932/0xa40 [ 26.078449][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 26.078582][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 26.078712][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 26.078836][ T67] ? lock_acquire+0x32/0xc0 [ 26.078963][ T67] ? process_one_work+0xe0b/0x16d0 [ 26.079095][ T67] process_one_work+0xe55/0x16d0 [ 26.079222][ T67] ? __pfx___lock_release+0x10/0x10 [ 26.079346][ T67] ? __pfx_process_one_work+0x10/0x10 [ 26.079472][ T67] ? assign_work+0x16c/0x240 [ 26.079599][ T67] worker_thread+0x58c/0xce0 [ 26.079732][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 26.079893][ T67] ? __pfx_worker_thread+0x10/0x10 [ 26.080019][ T67] ? __pfx_worker_thread+0x10/0x10 [ 26.080148][ T67] kthread+0x28a/0x350 [ 26.080248][ T67] ? __pfx_kthread+0x10/0x10 [ 26.080377][ T67] ret_from_fork+0x31/0x70 [ 26.080511][ T67] ? __pfx_kthread+0x10/0x10 [ 26.080637][ T67] ret_from_fork_asm+0x1a/0x30 [ 26.080773][ T67] [ 26.080875][ T67] [ 26.080941][ T67] Allocated by task 252: [ 26.081040][ T67] kasan_save_stack+0x24/0x50 [ 26.081166][ T67] kasan_save_track+0x14/0x30 [ 26.081303][ T67] __kasan_slab_alloc+0x59/0x70 [ 26.081426][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 26.081557][ T67] copy_net_ns+0xc6/0x340 [ 26.081656][ T67] create_new_namespaces+0x35f/0x920 [ 26.081783][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 26.081910][ T67] ksys_unshare+0x2a9/0x660 [ 26.082040][ T67] __x64_sys_unshare+0x31/0x40 [ 26.082162][ T67] do_syscall_64+0xc1/0x1d0 [ 26.082294][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.082453][ T67] [ 26.082518][ T67] Freed by task 67: [ 26.082612][ T67] kasan_save_stack+0x24/0x50 [ 26.082737][ T67] kasan_save_track+0x14/0x30 [ 26.082881][ T67] kasan_save_free_info+0x3b/0x60 [ 26.083009][ T67] __kasan_slab_free+0x38/0x50 [ 26.083130][ T67] kmem_cache_free+0xf8/0x330 [ 26.083266][ T67] cleanup_net+0x5a8/0xa40 [ 26.083394][ T67] process_one_work+0xe55/0x16d0 [ 26.083517][ T67] worker_thread+0x58c/0xce0 [ 26.083641][ T67] kthread+0x28a/0x350 [ 26.083740][ T67] ret_from_fork+0x31/0x70 [ 26.083867][ T67] ret_from_fork_asm+0x1a/0x30 [ 26.083997][ T67] [ 26.084062][ T67] Last potentially related work creation: [ 26.084190][ T67] kasan_save_stack+0x24/0x50 [ 26.084314][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 26.084437][ T67] insert_work+0x34/0x230 [ 26.084531][ T67] __queue_work+0x5fd/0xa40 [ 26.084660][ T67] queue_delayed_work_on+0x8c/0xa0 [ 26.084788][ T67] __inet_insert_ifa+0x751/0xb10 [ 26.084918][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 26.085053][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 26.085190][ T67] netlink_rcv_skb+0x130/0x360 [ 26.085324][ T67] netlink_unicast+0x44b/0x710 [ 26.085451][ T67] netlink_sendmsg+0x723/0xbe0 [ 26.085580][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 26.085707][ T67] ___sys_sendmsg+0xee/0x170 [ 26.085835][ T67] __sys_sendmsg+0x109/0x1a0 [ 26.085962][ T67] do_syscall_64+0xc1/0x1d0 [ 26.086088][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.086246][ T67] [ 26.086311][ T67] Second to last potentially related work creation: [ 26.086458][ T67] kasan_save_stack+0x24/0x50 [ 26.086586][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 26.086709][ T67] insert_work+0x34/0x230 [ 26.086802][ T67] __queue_work+0x5fd/0xa40 [ 26.086928][ T67] queue_delayed_work_on+0x8c/0xa0 [ 26.087055][ T67] __inet_insert_ifa+0x751/0xb10 [ 26.087181][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 26.087306][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 26.087438][ T67] netlink_rcv_skb+0x130/0x360 [ 26.087565][ T67] netlink_unicast+0x44b/0x710 [ 26.087687][ T67] netlink_sendmsg+0x723/0xbe0 [ 26.087813][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 26.087938][ T67] ___sys_sendmsg+0xee/0x170 [ 26.088060][ T67] __sys_sendmsg+0x109/0x1a0 [ 26.088187][ T67] do_syscall_64+0xc1/0x1d0 [ 26.088307][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.088460][ T67] [ 26.088522][ T67] The buggy address belongs to the object at ffff88800b480040 [ 26.088522][ T67] which belongs to the cache net_namespace of size 6592 [ 26.088842][ T67] The buggy address is located 184 bytes inside of [ 26.088842][ T67] freed 6592-byte region [ffff88800b480040, ffff88800b481a00) [ 26.089136][ T67] [ 26.089197][ T67] The buggy address belongs to the physical page: [ 26.089346][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb480 [ 26.089566][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 26.089746][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 26.089907][ T67] page_type: f5(slab) [ 26.090009][ T67] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 26.090228][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 26.090441][ T67] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 26.090665][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 26.090882][ T67] head: 0080000000000003 ffffea00002d2001 ffffffffffffffff 0000000000000000 [ 26.091095][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 26.091309][ T67] page dumped because: kasan: bad access detected [ 26.091459][ T67] [ 26.091522][ T67] Memory state around the buggy address: [ 26.091646][ T67] ffff88800b47ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.091827][ T67] ffff88800b480000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.092005][ T67] >ffff88800b480080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.092180][ T67] ^ [ 26.092362][ T67] ffff88800b480100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.092552][ T67] ffff88800b480180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.092735][ T67] ================================================================== [ 26.092987][ T67] Disabling lock debugging due to kernel taint