================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:199 [inline] BUG: KASAN: use-after-free in list_empty include/linux/list.h:268 [inline] BUG: KASAN: use-after-free in waitqueue_active include/linux/wait.h:126 [inline] BUG: KASAN: use-after-free in wq_has_sleeper include/linux/wait.h:160 [inline] BUG: KASAN: use-after-free in skwq_has_sleeper include/net/sock.h:2088 [inline] BUG: KASAN: use-after-free in sock_def_write_space+0x486/0x4b0 net/core/sock.c:2806 Read of size 8 at addr ffff88809aeb1578 by task kworker/1:3/7608 CPU: 1 PID: 7608 Comm: kworker/1:3 Not tainted 5.4.0-rc1+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp srcu_invoke_callbacks Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x113/0x167 lib/dump_stack.c:113 print_address_description.constprop.8.cold.10+0x9/0x31d mm/kasan/report.c:374 __kasan_report.cold.11+0x1b/0x3a mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:634 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132 __read_once_size include/linux/compiler.h:199 [inline] list_empty include/linux/list.h:268 [inline] waitqueue_active include/linux/wait.h:126 [inline] wq_has_sleeper include/linux/wait.h:160 [inline] skwq_has_sleeper include/net/sock.h:2088 [inline] sock_def_write_space+0x486/0x4b0 net/core/sock.c:2806 sock_wfree+0x100/0x130 net/core/sock.c:1953 skb_release_head_state+0x9f/0x1a0 net/core/skbuff.c:652 skb_release_all+0xd/0x50 net/core/skbuff.c:663 _kfree_skb_defer net/core/skbuff.c:873 [inline] napi_consume_skb+0x129/0x430 net/core/skbuff.c:918 free_old_xmit_skbs+0xbc/0x1f0 drivers/net/virtio_net.c:1366 virtnet_poll_tx+0x1e5/0x360 drivers/net/virtio_net.c:1493 napi_poll net/core/dev.c:6392 [inline] net_rx_action+0x458/0xe40 net/core/dev.c:6460 __do_softirq+0x262/0x9a8 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.12+0x126/0x160 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x21d/0x260 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] srcu_invoke_callbacks+0x23a/0x360 kernel/rcu/srcutree.c:1186 process_one_work+0x856/0x1630 kernel/workqueue.c:2269 worker_thread+0x85/0xb60 kernel/workqueue.c:2415 kthread+0x331/0x3f0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 22762: save_stack+0x21/0x90 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc.constprop.9+0xc7/0xd0 mm/kasan/common.c:510 kasan_slab_alloc+0x12/0x20 mm/kasan/common.c:518 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc mm/slab.c:3319 [inline] kmem_cache_alloc+0x121/0x750 mm/slab.c:3483 sock_alloc_inode+0x16/0x1a0 net/socket.c:239 alloc_inode+0x5c/0x1a0 fs/inode.c:230 new_inode_pseudo+0xc/0xd0 fs/inode.c:919 sock_alloc+0x3c/0x270 net/socket.c:558 __sock_create+0x7a/0x540 net/socket.c:1382 sock_create net/socket.c:1469 [inline] __sys_socket+0xd7/0x1c0 net/socket.c:1511 __do_sys_socket net/socket.c:1520 [inline] __se_sys_socket net/socket.c:1518 [inline] __x64_sys_socket+0x6e/0xb0 net/socket.c:1518 do_syscall_64+0xca/0x5d0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 16: save_stack+0x21/0x90 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] kasan_set_free_info mm/kasan/common.c:332 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:471 kasan_slab_free+0xe/0x10 mm/kasan/common.c:480 __cache_free mm/slab.c:3425 [inline] kmem_cache_free+0x83/0x320 mm/slab.c:3693 sock_free_inode+0x17/0x20 net/socket.c:260 i_callback+0x3c/0x70 fs/inode.c:219 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch kernel/rcu/tree.c:2157 [inline] rcu_core+0x557/0x14b0 kernel/rcu/tree.c:2377 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2386 __do_softirq+0x262/0x9a8 kernel/softirq.c:292 The buggy address belongs to the object at ffff88809aeb1500 which belongs to the cache sock_inode_cache(33:syz0) of size 1152 The buggy address is located 120 bytes inside of 1152-byte region [ffff88809aeb1500, ffff88809aeb1980) The buggy address belongs to the page: page:ffffea00026bac40 refcount:1 mapcount:0 mapping:ffff888090ac0a80 index:0xffff88809aeb1ffd flags: 0x1fffc0000000200(slab) raw: 01fffc0000000200 ffffea0002454948 ffffea00026bf808 ffff888090ac0a80 raw: ffff88809aeb1ffd ffff88809aeb1000 0000000100000003 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809aeb1400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809aeb1480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88809aeb1500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88809aeb1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809aeb1600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================