================================================================== 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 ffff888090ea40c4 by task syz-executor.4/8203 CPU: 1 PID: 8203 Comm: syz-executor.4 Not tainted 5.1.0-rc1+ #35 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+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_sendmsg+0x3017/0x3550 net/rds/send.c:1369 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:632 __sys_sendto+0x262/0x380 net/socket.c:1809 __do_sys_sendto net/socket.c:1821 [inline] __se_sys_sendto net/socket.c:1817 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1817 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458209 Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4eab58fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458209 RDX: 0000000000000481 RSI: 0000000020000e40 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 00000000200004c0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4eab5906d4 R13: 00000000004c58b8 R14: 00000000004d9838 R15: 00000000ffffffff Allocated by task 29098: 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 __do_kmalloc_node mm/slab.c:3686 [inline] __kmalloc_node+0x4e/0x70 mm/slab.c:3693 kmalloc_node include/linux/slab.h:588 [inline] kvmalloc_node+0xbd/0x100 mm/util.c:430 kvmalloc include/linux/mm.h:605 [inline] kvzalloc include/linux/mm.h:613 [inline] alloc_netdev_mqs+0x98/0xd30 net/core/dev.c:9122 rtnl_create_link+0x22d/0xac0 net/core/rtnetlink.c:2914 __rtnl_newlink+0xf7b/0x16c0 net/core/rtnetlink.c:3166 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3234 rtnetlink_rcv_msg+0x465/0xb00 net/core/rtnetlink.c:5192 netlink_rcv_skb+0x17a/0x460 net/netlink/af_netlink.c:2485 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5210 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x536/0x720 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1925 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:632 ___sys_sendmsg+0x806/0x930 net/socket.c:2137 __sys_sendmsg+0x105/0x1d0 net/socket.c:2175 __do_sys_sendmsg net/socket.c:2184 [inline] __se_sys_sendmsg net/socket.c:2182 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2182 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 17536: 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 snd_seq_oss_readq_delete+0x38/0x60 sound/core/seq/oss/seq_oss_readq.c:78 free_devinfo+0x92/0xc0 sound/core/seq/oss/seq_oss_init.c:408 port_delete+0xe8/0x1c0 sound/core/seq/seq_ports.c:273 snd_seq_delete_port+0x272/0x340 sound/core/seq/seq_ports.c:303 snd_seq_ioctl_delete_port+0xba/0x190 sound/core/seq/seq_clientmgr.c:1324 snd_seq_kernel_client_ctl+0x101/0x150 sound/core/seq/seq_clientmgr.c:2353 snd_seq_event_port_detach+0xba/0x100 sound/core/seq/seq_ports.c:705 delete_port+0x87/0xd0 sound/core/seq/oss/seq_oss_init.c:354 snd_seq_oss_release+0xf5/0x150 sound/core/seq/oss/seq_oss_init.c:433 odev_release+0x54/0x80 sound/core/seq/oss/seq_oss.c:153 __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 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x90a/0x2fa0 kernel/exit.c:876 do_group_exit+0x135/0x370 kernel/exit.c:980 get_signal+0x399/0x1d50 kernel/signal.c:2577 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162 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 The buggy address belongs to the object at ffff888090ea5000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 3900 bytes to the left of 8192-byte region [ffff888090ea5000, ffff888090ea7000) The buggy address belongs to the page: page:ffffea000243a900 count:1 mapcount:0 mapping:ffff88812c3f2080 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000010200(slab|head) raw: 01fffc0000010200 ffffea00021bbd08 ffffea00025b9008 ffff88812c3f2080 raw: 0000000000000000 ffff888090ea5000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888090ea3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888090ea4000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888090ea4080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888090ea4100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888090ea4180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================