random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) ================================================================== BUG: KASAN: use-after-free in nla_strlcpy+0x13d/0x150 lib/nlattr.c:314 Read of size 1 at addr ffff8801cf2a04dd by task syz-executor717/4561 CPU: 1 PID: 4561 Comm: syz-executor717 Not tainted 4.17.0-rc6+ #68 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+0x1b9/0x294 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430 nla_strlcpy+0x13d/0x150 lib/nlattr.c:314 nfnl_acct_new+0x574/0xc50 net/netfilter/nfnetlink_acct.c:118 nfnetlink_rcv_msg+0xdb5/0xff0 net/netfilter/nfnetlink.c:212 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448 nfnetlink_rcv+0x1fe/0x1ba0 net/netfilter/nfnetlink.c:513 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 sock_write_iter+0x35a/0x5a0 net/socket.c:908 call_write_iter include/linux/fs.h:1784 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x64d/0x960 fs/read_write.c:487 vfs_write+0x1f8/0x560 fs/read_write.c:549 ksys_write+0xf9/0x250 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x43fcf9 RSP: 002b:00007ffc5c634518 EFLAGS: 00000213 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fcf9 RDX: 000000000000001f RSI: 0000000020390000 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401620 R13: 00000000004016b0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 1: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554 mempool_alloc_slab+0x44/0x60 mm/mempool.c:450 mempool_create_node+0x2cf/0x610 mm/mempool.c:211 mempool_create+0x37/0x40 mm/mempool.c:179 mempool_create_slab_pool include/linux/mempool.h:49 [inline] biovec_create_pool block/bio.c:1855 [inline] bioset_create+0x6b3/0x900 block/bio.c:1921 blk_alloc_queue_node+0x16e/0xe40 block/blk-core.c:1009 blk_mq_init_queue+0x4b/0xb0 block/blk-mq.c:2546 scsi_mq_alloc_queue+0x45/0x190 drivers/scsi/scsi_lib.c:2300 scsi_alloc_sdev+0xc0e/0x11a0 drivers/scsi/scsi_scan.c:270 scsi_probe_and_add_lun+0x20aa/0x3260 drivers/scsi/scsi_scan.c:1086 __scsi_scan_target+0x2c0/0xfe0 drivers/scsi/scsi_scan.c:1569 scsi_scan_channel.part.7+0x11f/0x190 drivers/scsi/scsi_scan.c:1657 scsi_scan_channel drivers/scsi/scsi_scan.c:1684 [inline] scsi_scan_host_selected+0x2b9/0x3d0 drivers/scsi/scsi_scan.c:1686 do_scsi_scan_host+0x1ee/0x260 drivers/scsi/scsi_scan.c:1824 scsi_scan_host+0x4a2/0x590 drivers/scsi/scsi_scan.c:1854 virtscsi_probe+0xbe5/0xf04 drivers/scsi/virtio_scsi.c:913 virtio_dev_probe+0x592/0x942 drivers/virtio/virtio.c:245 really_probe drivers/base/dd.c:448 [inline] driver_probe_device+0x69b/0x960 drivers/base/dd.c:590 __driver_attach+0x1b2/0x1f0 drivers/base/dd.c:824 bus_for_each_dev+0x151/0x1d0 drivers/base/bus.c:311 driver_attach+0x3d/0x50 drivers/base/dd.c:843 bus_add_driver+0x4b2/0x600 drivers/base/bus.c:667 driver_register+0x1bf/0x320 drivers/base/driver.c:166 register_virtio_driver+0x79/0xd0 drivers/virtio/virtio.c:296 is_blacklisted_cpu arch/x86/crypto/camellia_glue.c:1473 [inline] init+0xa3/0x114 arch/x86/crypto/camellia_glue.c:1494 do_one_initcall+0x127/0x913 init/main.c:884 do_initcall_level init/main.c:952 [inline] do_initcalls init/main.c:960 [inline] do_basic_setup init/main.c:978 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1135 kernel_init+0x11/0x1b3 init/main.c:1061 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Freed by task 25: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x86/0x2d0 mm/slab.c:3756 mempool_free_slab+0x1d/0x30 mm/mempool.c:457 mempool_destroy.part.6+0xcc/0x180 mm/mempool.c:155 mempool_destroy+0x1f/0x30 mm/mempool.c:150 bioset_free+0xa9/0x320 block/bio.c:1864 __blk_release_queue+0x195/0x380 block/blk-sysfs.c:817 process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145 worker_thread+0x1cc/0x1440 kernel/workqueue.c:2279 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 The buggy address belongs to the object at ffff8801cf2a0200 which belongs to the cache biovec-max of size 8192 The buggy address is located 733 bytes inside of 8192-byte region [ffff8801cf2a0200, ffff8801cf2a2200) The buggy address belongs to the page: page:ffffea00073ca800 count:1 mapcount:0 mapping:ffff8801cf2a0200 index:0xffff8801cf2a0200 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801cf2a0200 ffff8801cf2a0200 0000000100000000 raw: ffff8801d7f33458 ffffea00073d4c20 ffff8801d7f38300 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cf2a0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cf2a0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cf2a0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cf2a0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cf2a0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================