================================================================== 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 ffff88808cb540c4 by task syz-executor.0/3625 CPU: 0 PID: 3625 Comm: syz-executor.0 Not tainted 5.0.0+ #104 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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+0x2ab/0x3f0 net/rds/recv.c:126 rds_recv_rcvbuf_delta net/rds/recv.c:764 [inline] rds_clear_recv_queue+0x233/0x380 net/rds/recv.c:764 rds_release+0x108/0x3c0 net/rds/af_rds.c:73 __sock_release+0xd3/0x2b0 net/socket.c:599 sock_close+0x1b/0x30 net/socket.c:1247 __fput+0x2e5/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411fc1 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffdfd986fc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411fc1 RDX: 0000000000000001 RSI: 0000000000741350 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00000000000b9735 R09: 00000000000b9735 R10: 00007ffdfd986ef0 R11: 0000000000000293 R12: 0000000000000001 R13: 00007ffdfd987000 R14: 0000000000000000 R15: 00007ffdfd987010 Allocated by task 3874: 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] do_renameat2+0x199/0xc40 fs/namei.c:4543 __do_sys_rename fs/namei.c:4671 [inline] __se_sys_rename fs/namei.c:4669 [inline] __x64_sys_rename+0x61/0x80 fs/namei.c:4669 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 3874: 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 do_renameat2+0x2b4/0xc40 fs/namei.c:4647 __do_sys_rename fs/namei.c:4671 [inline] __se_sys_rename fs/namei.c:4669 [inline] __x64_sys_rename+0x61/0x80 fs/namei.c:4669 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 ffff88808cb542c0 which belongs to the cache names_cache of size 4096 The buggy address is located 508 bytes to the left of 4096-byte region [ffff88808cb542c0, ffff88808cb552c0) The buggy address belongs to the page: page:ffffea000232d500 count:1 mapcount:0 mapping:ffff88812c2d8dc0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00018d7d08 ffffea0001abab88 ffff88812c2d8dc0 raw: 0000000000000000 ffff88808cb542c0 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88808cb53f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808cb54000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88808cb54080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88808cb54100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808cb54180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================