[ 11.384031][ T274] gro (274) used greatest stack depth: 24024 bytes left [ 11.611828][ T66] ================================================================== [ 11.612067][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.612277][ T66] Read of size 8 at addr ffff888005289bf8 by task kworker/u16:1/66 [ 11.612488][ T66] [ 11.612561][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.612762][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.612931][ T66] Workqueue: netns cleanup_net [ 11.613079][ T66] Call Trace: [ 11.613183][ T66] [ 11.613255][ T66] dump_stack_lvl+0x82/0xd0 [ 11.613403][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 11.613574][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.613710][ T66] print_report+0xb4/0x270 [ 11.613844][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 11.613982][ T66] kasan_report+0xbd/0xf0 [ 11.614087][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.614224][ T66] cleanup_net+0xa5d/0xb90 [ 11.614358][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.614499][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 11.614632][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 11.614768][ T66] ? lock_acquire+0x32/0xc0 [ 11.614906][ T66] ? process_one_work+0xe0b/0x16d0 [ 11.615048][ T66] process_one_work+0xe55/0x16d0 [ 11.615186][ T66] ? __pfx___lock_release+0x10/0x10 [ 11.615323][ T66] ? __pfx_process_one_work+0x10/0x10 [ 11.615463][ T66] ? assign_work+0x16c/0x240 [ 11.615601][ T66] worker_thread+0x58c/0xce0 [ 11.615735][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.615905][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.616041][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.616180][ T66] kthread+0x28a/0x350 [ 11.616287][ T66] ? __pfx_kthread+0x10/0x10 [ 11.616424][ T66] ret_from_fork+0x31/0x70 [ 11.616560][ T66] ? __pfx_kthread+0x10/0x10 [ 11.616698][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.616838][ T66] [ 11.616940][ T66] [ 11.617008][ T66] Allocated by task 270: [ 11.617115][ T66] kasan_save_stack+0x24/0x50 [ 11.617254][ T66] kasan_save_track+0x14/0x30 [ 11.617390][ T66] __kasan_slab_alloc+0x59/0x70 [ 11.617522][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.617657][ T66] copy_net_ns+0xc6/0x540 [ 11.617760][ T66] create_new_namespaces+0x35f/0x920 [ 11.617906][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.618043][ T66] ksys_unshare+0x2c4/0x6e0 [ 11.618179][ T66] __x64_sys_unshare+0x31/0x40 [ 11.618317][ T66] do_syscall_64+0xc1/0x1d0 [ 11.618455][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.618627][ T66] [ 11.618694][ T66] Freed by task 66: [ 11.618803][ T66] kasan_save_stack+0x24/0x50 [ 11.618941][ T66] kasan_save_track+0x14/0x30 [ 11.619075][ T66] kasan_save_free_info+0x3b/0x60 [ 11.619210][ T66] __kasan_slab_free+0x38/0x50 [ 11.619345][ T66] kmem_cache_free+0xf8/0x330 [ 11.619479][ T66] cleanup_net+0x5a8/0xb90 [ 11.619613][ T66] process_one_work+0xe55/0x16d0 [ 11.619750][ T66] worker_thread+0x58c/0xce0 [ 11.619885][ T66] kthread+0x28a/0x350 [ 11.619987][ T66] ret_from_fork+0x31/0x70 [ 11.620129][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.620266][ T66] [ 11.620336][ T66] The buggy address belongs to the object at ffff888005289b40 [ 11.620336][ T66] which belongs to the cache net_namespace of size 6528 [ 11.620710][ T66] The buggy address is located 184 bytes inside of [ 11.620710][ T66] freed 6528-byte region [ffff888005289b40, ffff88800528b4c0) [ 11.621038][ T66] [ 11.621108][ T66] The buggy address belongs to the physical page: [ 11.621270][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800528b640 pfn:0x5288 [ 11.621545][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.621750][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.621926][ T66] page_type: f5(slab) [ 11.622040][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.622280][ T66] raw: ffff88800528b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.622532][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.622771][ T66] head: ffff88800528b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.623012][ T66] head: 0080000000000003 ffffea000014a201 ffffffffffffffff 0000000000000000 [ 11.623250][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.623490][ T66] page dumped because: kasan: bad access detected [ 11.623659][ T66] [ 11.623728][ T66] Memory state around the buggy address: [ 11.623859][ T66] ffff888005289a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.624058][ T66] ffff888005289b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.624252][ T66] >ffff888005289b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.624454][ T66] ^ [ 11.624656][ T66] ffff888005289c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.624853][ T66] ffff888005289c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.625052][ T66] ================================================================== [ 11.625283][ T66] Disabling lock debugging due to kernel taint