================================================================== BUG: KASAN: slab-out-of-bounds in atomic_read include/asm-generic/atomic-instrumented.h:26 [inline] BUG: KASAN: slab-out-of-bounds in refcount_read include/linux/refcount.h:43 [inline] BUG: KASAN: slab-out-of-bounds in check_net include/net/net_namespace.h:254 [inline] BUG: KASAN: slab-out-of-bounds in rds_destroy_pending net/rds/rds.h:951 [inline] BUG: KASAN: slab-out-of-bounds in rds_cong_queue_updates+0x209/0x4d0 net/rds/cong.c:229 Read of size 4 at addr ffff88806086c144 by task kworker/u4:8/11472 CPU: 1 PID: 11472 Comm: kworker/u4:8 Not tainted 5.1.0-rc1+ #32 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:102 atomic_read include/asm-generic/atomic-instrumented.h:26 [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:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Allocated by task 23403: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:511 kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3621 kmalloc include/linux/slab.h:545 [inline] perf_event_mmap_event kernel/events/core.c:7274 [inline] perf_event_mmap+0x535/0xec0 kernel/events/core.c:7491 mprotect_fixup+0x57a/0xa70 mm/mprotect.c:446 do_mprotect_pkey+0x594/0xa30 mm/mprotect.c:556 __do_sys_mprotect mm/mprotect.c:581 [inline] __se_sys_mprotect mm/mprotect.c:578 [inline] __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:578 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 23403: save_stack+0x45/0xd0 mm/kasan/common.c:75 set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:459 kasan_slab_free+0xe/0x10 mm/kasan/common.c:467 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3821 perf_event_mmap_event kernel/events/core.c:7354 [inline] perf_event_mmap+0x7e7/0xec0 kernel/events/core.c:7491 mprotect_fixup+0x57a/0xa70 mm/mprotect.c:446 do_mprotect_pkey+0x594/0xa30 mm/mprotect.c:556 __do_sys_mprotect mm/mprotect.c:581 [inline] __se_sys_mprotect mm/mprotect.c:578 [inline] __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:578 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88806086ca80 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2364 bytes to the left of 4096-byte region [ffff88806086ca80, ffff88806086da80) The buggy address belongs to the page: page:ffffea0001821b00 count:1 mapcount:0 mapping:ffff88812c3f0dc0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00013d0f08 ffffea000239b688 ffff88812c3f0dc0 raw: 0000000000000000 ffff88806086ca80 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88806086c000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806086c080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88806086c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88806086c180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806086c200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================