[ 10.407316][ T228] modprobe (228) used greatest stack depth: 24376 bytes left [ 10.527374][ T11] ================================================================== [ 10.527621][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.527835][ T11] Read of size 8 at addr ffff88800bcc00f8 by task kworker/u16:0/11 [ 10.528037][ T11] [ 10.528109][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 10.528314][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.528486][ T11] Workqueue: netns cleanup_net [ 10.528634][ T11] Call Trace: [ 10.528740][ T11] [ 10.528820][ T11] dump_stack_lvl+0x82/0xd0 [ 10.528966][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 10.529145][ T11] ? cleanup_net+0x932/0xa40 [ 10.529286][ T11] print_report+0xb4/0x270 [ 10.529425][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 10.529565][ T11] kasan_report+0xbd/0xf0 [ 10.529673][ T11] ? cleanup_net+0x932/0xa40 [ 10.529832][ T11] cleanup_net+0x932/0xa40 [ 10.529974][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.530116][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 10.530255][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 10.530393][ T11] ? lock_acquire+0x32/0xc0 [ 10.530533][ T11] ? process_one_work+0xe0b/0x16d0 [ 10.530674][ T11] process_one_work+0xe55/0x16d0 [ 10.530817][ T11] ? __pfx___lock_release+0x10/0x10 [ 10.530957][ T11] ? __pfx_process_one_work+0x10/0x10 [ 10.531095][ T11] ? assign_work+0x16c/0x240 [ 10.531237][ T11] worker_thread+0x58c/0xce0 [ 10.531380][ T11] ? __pfx_worker_thread+0x10/0x10 [ 10.531519][ T11] kthread+0x28a/0x350 [ 10.531627][ T11] ? __pfx_kthread+0x10/0x10 [ 10.531765][ T11] ret_from_fork+0x31/0x70 [ 10.531905][ T11] ? __pfx_kthread+0x10/0x10 [ 10.532042][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.532187][ T11] [ 10.532293][ T11] [ 10.532364][ T11] Allocated by task 227: [ 10.532468][ T11] kasan_save_stack+0x24/0x50 [ 10.532608][ T11] kasan_save_track+0x14/0x30 [ 10.532744][ T11] __kasan_slab_alloc+0x59/0x70 [ 10.532883][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.533024][ T11] copy_net_ns+0xc6/0x340 [ 10.533126][ T11] create_new_namespaces+0x35f/0x920 [ 10.533263][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.533398][ T11] ksys_unshare+0x2a9/0x660 [ 10.533539][ T11] __x64_sys_unshare+0x31/0x40 [ 10.533675][ T11] do_syscall_64+0xc1/0x1d0 [ 10.533815][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.533988][ T11] [ 10.534060][ T11] Freed by task 11: [ 10.534162][ T11] kasan_save_stack+0x24/0x50 [ 10.534301][ T11] kasan_save_track+0x14/0x30 [ 10.534437][ T11] kasan_save_free_info+0x3b/0x60 [ 10.534575][ T11] __kasan_slab_free+0x38/0x50 [ 10.534719][ T11] kmem_cache_free+0xf8/0x330 [ 10.534862][ T11] cleanup_net+0x5a8/0xa40 [ 10.535002][ T11] process_one_work+0xe55/0x16d0 [ 10.535143][ T11] worker_thread+0x58c/0xce0 [ 10.535280][ T11] kthread+0x28a/0x350 [ 10.535379][ T11] ret_from_fork+0x31/0x70 [ 10.535515][ T11] ret_from_fork_asm+0x1a/0x30 [ 10.535650][ T11] [ 10.535722][ T11] The buggy address belongs to the object at ffff88800bcc0040 [ 10.535722][ T11] which belongs to the cache net_namespace of size 5696 [ 10.536087][ T11] The buggy address is located 184 bytes inside of [ 10.536087][ T11] freed 5696-byte region [ffff88800bcc0040, ffff88800bcc1680) [ 10.536413][ T11] [ 10.536483][ T11] The buggy address belongs to the physical page: [ 10.536648][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bcc2fc0 pfn:0xbcc0 [ 10.536924][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.537136][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.537314][ T11] page_type: f5(slab) [ 10.537424][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.537672][ T11] raw: ffff88800bcc2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.537921][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.538165][ T11] head: ffff88800bcc2fc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.538411][ T11] head: 0080000000000003 ffffea00002f3001 ffffffffffffffff 0000000000000000 [ 10.538655][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.538895][ T11] page dumped because: kasan: bad access detected [ 10.539073][ T11] [ 10.539145][ T11] Memory state around the buggy address: [ 10.539278][ T11] ffff88800bcbff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.539477][ T11] ffff88800bcc0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.539673][ T11] >ffff88800bcc0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.539889][ T11] ^ [ 10.540089][ T11] ffff88800bcc0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.540287][ T11] ffff88800bcc0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.540484][ T11] ================================================================== [ 10.540746][ T11] Disabling lock debugging due to kernel taint [ 12.525615][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.526496][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.527351][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.528084][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3 [ 12.529332][ T227] TCP: AO key ifindex 200 != sk bound ifindex 3