[ 10.706880][ T229] modprobe (229) used greatest stack depth: 23944 bytes left [ 10.715615][ T66] ================================================================== [ 10.715883][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 10.716117][ T66] Read of size 8 at addr ffff88800b5d80f8 by task kworker/u16:1/66 [ 10.716340][ T66] [ 10.716421][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 10.716665][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.716867][ T66] Workqueue: netns cleanup_net [ 10.717026][ T66] Call Trace: [ 10.717147][ T66] [ 10.717233][ T66] dump_stack_lvl+0x82/0xd0 [ 10.717406][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 10.717622][ T66] ? cleanup_net+0x932/0xa40 [ 10.717782][ T66] print_report+0xb4/0x270 [ 10.717936][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 10.718089][ T66] kasan_report+0xbd/0xf0 [ 10.718206][ T66] ? cleanup_net+0x932/0xa40 [ 10.718361][ T66] cleanup_net+0x932/0xa40 [ 10.718522][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 10.718679][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 10.718831][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 10.718987][ T66] ? lock_acquire+0x32/0xc0 [ 10.719141][ T66] ? process_one_work+0xe0b/0x16d0 [ 10.719307][ T66] process_one_work+0xe55/0x16d0 [ 10.719474][ T66] ? __pfx___lock_release+0x10/0x10 [ 10.719629][ T66] ? __pfx_process_one_work+0x10/0x10 [ 10.719786][ T66] ? assign_work+0x16c/0x240 [ 10.719940][ T66] worker_thread+0x58c/0xce0 [ 10.720092][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 10.720282][ T66] ? __pfx_worker_thread+0x10/0x10 [ 10.720436][ T66] ? __pfx_worker_thread+0x10/0x10 [ 10.720595][ T66] kthread+0x28a/0x350 [ 10.720712][ T66] ? __pfx_kthread+0x10/0x10 [ 10.720865][ T66] ret_from_fork+0x31/0x70 [ 10.721018][ T66] ? __pfx_kthread+0x10/0x10 [ 10.721170][ T66] ret_from_fork_asm+0x1a/0x30 [ 10.721331][ T66] [ 10.721447][ T66] [ 10.721535][ T66] Allocated by task 226: [ 10.721650][ T66] kasan_save_stack+0x24/0x50 [ 10.721811][ T66] kasan_save_track+0x14/0x30 [ 10.721961][ T66] __kasan_slab_alloc+0x59/0x70 [ 10.722111][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 10.722269][ T66] copy_net_ns+0xc6/0x340 [ 10.722383][ T66] create_new_namespaces+0x35f/0x920 [ 10.722544][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 10.722697][ T66] ksys_unshare+0x2a9/0x660 [ 10.722852][ T66] __x64_sys_unshare+0x31/0x40 [ 10.723008][ T66] do_syscall_64+0xc1/0x1d0 [ 10.723167][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 10.723357][ T66] [ 10.723436][ T66] Freed by task 66: [ 10.723566][ T66] kasan_save_stack+0x24/0x50 [ 10.723718][ T66] kasan_save_track+0x14/0x30 [ 10.723865][ T66] kasan_save_free_info+0x3b/0x60 [ 10.724014][ T66] __kasan_slab_free+0x38/0x50 [ 10.724164][ T66] kmem_cache_free+0xf8/0x330 [ 10.724314][ T66] cleanup_net+0x5a8/0xa40 [ 10.724470][ T66] process_one_work+0xe55/0x16d0 [ 10.724620][ T66] worker_thread+0x58c/0xce0 [ 10.724771][ T66] kthread+0x28a/0x350 [ 10.724890][ T66] ret_from_fork+0x31/0x70 [ 10.725040][ T66] ret_from_fork_asm+0x1a/0x30 [ 10.725190][ T66] [ 10.725267][ T66] The buggy address belongs to the object at ffff88800b5d8040 [ 10.725267][ T66] which belongs to the cache net_namespace of size 5696 [ 10.725674][ T66] The buggy address is located 184 bytes inside of [ 10.725674][ T66] freed 5696-byte region [ffff88800b5d8040, ffff88800b5d9680) [ 10.726045][ T66] [ 10.726120][ T66] The buggy address belongs to the physical page: [ 10.726303][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b5dafc0 pfn:0xb5d8 [ 10.726614][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 10.726840][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 10.727042][ T66] page_type: f5(slab) [ 10.727164][ T66] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.727428][ T66] raw: ffff88800b5dafc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.727695][ T66] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 10.727961][ T66] head: ffff88800b5dafc0 0000000000050002 00000001f5000000 0000000000000000 [ 10.728231][ T66] head: 0080000000000003 ffffea00002d7601 ffffffffffffffff 0000000000000000 [ 10.728504][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 10.728771][ T66] page dumped because: kasan: bad access detected [ 10.728955][ T66] [ 10.729031][ T66] Memory state around the buggy address: [ 10.729194][ T66] ffff88800b5d7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 10.729421][ T66] ffff88800b5d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 10.729649][ T66] >ffff88800b5d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.729869][ T66] ^ [ 10.730092][ T66] ffff88800b5d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.730311][ T66] ffff88800b5d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 10.730539][ T66] ================================================================== [ 10.730782][ T66] Disabling lock debugging due to kernel taint