================================================================== netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'. BUG: KASAN: use-after-free in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:43 [inline] BUG: KASAN: use-after-free in check_net include/net/net_namespace.h:254 [inline] BUG: KASAN: use-after-free in rds_destroy_pending net/rds/rds.h:951 [inline] BUG: KASAN: use-after-free in rds_cong_queue_updates+0x209/0x4d0 net/rds/cong.c:229 Read of size 4 at addr ffff8880866400c4 by task kworker/u4:3/11973 CPU: 1 PID: 11973 Comm: kworker/u4:3 Not tainted 5.0.0-rc8+ #96 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krdsd rds_send_worker Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x123/0x190 mm/kasan/generic.c:191 kasan_check_read+0x11/0x20 mm/kasan/common.c:100 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline] refcount_read include/linux/refcount.h:43 [inline] check_net include/net/net_namespace.h:254 [inline] rds_destroy_pending net/rds/rds.h:951 [inline] rds_cong_queue_updates+0x209/0x4d0 net/rds/cong.c:229 rds_recv_rcvbuf_delta.part.0+0x34f/0x3f0 net/rds/recv.c:118 rds_recv_rcvbuf_delta net/rds/recv.c:379 [inline] rds_recv_incoming+0x789/0x11f0 net/rds/recv.c:379 rds_loop_xmit+0xf3/0x2a0 net/rds/loop.c:96 rds_send_xmit+0x1113/0x2560 net/rds/send.c:355 rds_send_worker+0x90/0x290 net/rds/threads.c:200 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173 worker_thread+0x98/0xe40 kernel/workqueue.c:2319 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the page: page:ffffea0002199000 count:0 mapcount:-128 mapping:0000000000000000 index:0xffff888086640000 flags: 0x1fffc0000000000() raw: 01fffc0000000000 ffffea0002255d08 ffffea0002a5d508 0000000000000000 raw: ffff888086640000 0000000000000002 00000000ffffff7f 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808663ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888086640000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888086640080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888086640100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888086640180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================