================================================================== 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 ffff8880a49e8384 by task kworker/u4:17/12505 CPU: 1 PID: 12505 Comm: kworker/u4:17 Not tainted 5.0.0+ #135 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 8665: 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_slab_alloc+0xf/0x20 mm/kasan/common.c:505 slab_post_alloc_hook mm/slab.h:436 [inline] slab_alloc mm/slab.c:3392 [inline] kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3554 getname_flags fs/namei.c:138 [inline] getname_flags+0xd6/0x5b0 fs/namei.c:128 getname fs/namei.c:209 [inline] user_path_create fs/namei.c:3692 [inline] do_symlinkat+0xe1/0x290 fs/namei.c:4145 __do_sys_symlink fs/namei.c:4171 [inline] __se_sys_symlink fs/namei.c:4169 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4169 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8665: 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] kmem_cache_free+0x86/0x260 mm/slab.c:3764 putname+0xef/0x130 fs/namei.c:259 filename_create+0x26f/0x4f0 fs/namei.c:3657 user_path_create fs/namei.c:3692 [inline] do_symlinkat+0xf3/0x290 fs/namei.c:4145 __do_sys_symlink fs/namei.c:4171 [inline] __se_sys_symlink fs/namei.c:4169 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4169 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 ffff8880a49e8c00 which belongs to the cache names_cache of size 4096 The buggy address is located 2172 bytes to the left of 4096-byte region [ffff8880a49e8c00, ffff8880a49e9c00) The buggy address belongs to the page: page:ffffea0002927a00 count:1 mapcount:0 mapping:ffff88812c2d8dc0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea000156ba88 ffffea0002927a88 ffff88812c2d8dc0 raw: 0000000000000000 ffff8880a49e8c00 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a49e8280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a49e8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a49e8380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880a49e8400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a49e8480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================