[ 11.353685][ T11] ================================================================== [ 11.353931][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 11.354133][ T11] Read of size 8 at addr ffff88800b1200f8 by task kworker/u16:0/11 [ 11.354321][ T11] [ 11.354389][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.354615][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.354790][ T11] Workqueue: netns cleanup_net [ 11.354937][ T11] Call Trace: [ 11.355035][ T11] [ 11.355107][ T11] dump_stack_lvl+0x82/0xd0 [ 11.355247][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.355417][ T11] ? cleanup_net+0x932/0xa40 [ 11.355555][ T11] print_report+0xb4/0x270 [ 11.355698][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.355823][ T11] kasan_report+0xbd/0xf0 [ 11.355922][ T11] ? cleanup_net+0x932/0xa40 [ 11.356060][ T11] cleanup_net+0x932/0xa40 [ 11.356187][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.356316][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.356450][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.356580][ T11] ? lock_acquire+0x32/0xc0 [ 11.356703][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.356836][ T11] process_one_work+0xe55/0x16d0 [ 11.356978][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.357103][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.357246][ T11] ? assign_work+0x16c/0x240 [ 11.357379][ T11] worker_thread+0x58c/0xce0 [ 11.357515][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.357649][ T11] kthread+0x28a/0x350 [ 11.357753][ T11] ? __pfx_kthread+0x10/0x10 [ 11.357880][ T11] ret_from_fork+0x31/0x70 [ 11.358011][ T11] ? __pfx_kthread+0x10/0x10 [ 11.358139][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.358278][ T11] [ 11.358387][ T11] [ 11.358467][ T11] Allocated by task 227: [ 11.358577][ T11] kasan_save_stack+0x24/0x50 [ 11.358710][ T11] kasan_save_track+0x14/0x30 [ 11.358836][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.358961][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.359096][ T11] copy_net_ns+0xc6/0x340 [ 11.359201][ T11] create_new_namespaces+0x35f/0x920 [ 11.359331][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 11.359462][ T11] ksys_unshare+0x2a9/0x660 [ 11.359591][ T11] __x64_sys_unshare+0x31/0x40 [ 11.359716][ T11] do_syscall_64+0xc1/0x1d0 [ 11.359843][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.360016][ T11] [ 11.360087][ T11] Freed by task 11: [ 11.360192][ T11] kasan_save_stack+0x24/0x50 [ 11.360321][ T11] kasan_save_track+0x14/0x30 [ 11.360448][ T11] kasan_save_free_info+0x3b/0x60 [ 11.360574][ T11] __kasan_slab_free+0x38/0x50 [ 11.360709][ T11] kmem_cache_free+0xf8/0x330 [ 11.360858][ T11] cleanup_net+0x5a8/0xa40 [ 11.360988][ T11] process_one_work+0xe55/0x16d0 [ 11.361112][ T11] worker_thread+0x58c/0xce0 [ 11.361238][ T11] kthread+0x28a/0x350 [ 11.361344][ T11] ret_from_fork+0x31/0x70 [ 11.361476][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.361606][ T11] [ 11.361672][ T11] The buggy address belongs to the object at ffff88800b120040 [ 11.361672][ T11] which belongs to the cache net_namespace of size 5696 [ 11.362013][ T11] The buggy address is located 184 bytes inside of [ 11.362013][ T11] freed 5696-byte region [ffff88800b120040, ffff88800b121680) [ 11.362376][ T11] [ 11.362467][ T11] The buggy address belongs to the physical page: [ 11.362636][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b122fc0 pfn:0xb120 [ 11.362905][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.363096][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.363261][ T11] page_type: f5(slab) [ 11.363361][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.363583][ T11] raw: ffff88800b122fc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.363809][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 11.364036][ T11] head: ffff88800b122fc0 0000000000050002 00000001f5000000 0000000000000000 [ 11.364258][ T11] head: 0080000000000003 ffffea00002c4801 ffffffffffffffff 0000000000000000 [ 11.364475][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.364705][ T11] page dumped because: kasan: bad access detected [ 11.364863][ T11] [ 11.364927][ T11] Memory state around the buggy address: [ 11.365052][ T11] ffff88800b11ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.365293][ T11] ffff88800b120000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.365470][ T11] >ffff88800b120080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.365695][ T11] ^ [ 11.365891][ T11] ffff88800b120100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.366070][ T11] ffff88800b120180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.366248][ T11] ================================================================== [ 11.366482][ T11] Disabling lock debugging due to kernel taint [ 12.346115][ T227] setsockopt-clos (227) used greatest stack depth: 24296 bytes left