================================================================== BUG: KASAN: stack-out-of-bounds in memset include/linux/string.h:340 [inline] BUG: KASAN: stack-out-of-bounds in ax25_getname+0x58/0x7a0 net/ax25/af_ax25.c:1406 Write of size 72 at addr ffff888091357c78 by task syz-executor.0/8269 CPU: 0 PID: 8269 Comm: syz-executor.0 Not tainted 5.1.0-rc6+ #81 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 memset+0x24/0x40 mm/kasan/common.c:115 memset include/linux/string.h:340 [inline] ax25_getname+0x58/0x7a0 net/ax25/af_ax25.c:1406 get_raw_socket drivers/vhost/net.c:1447 [inline] get_socket drivers/vhost/net.c:1503 [inline] vhost_net_set_backend drivers/vhost/net.c:1538 [inline] vhost_net_ioctl+0x120f/0x1900 drivers/vhost/net.c:1729 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458c39 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:00007f3564a21c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c39 RDX: 0000000020d7c000 RSI: 000000004008af30 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3564a226d4 R13: 00000000004c3657 R14: 00000000004d6b30 R15: 00000000ffffffff The buggy address belongs to the page: page:ffffea000244d5c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x1fffc0000000000() raw: 01fffc0000000000 0000000000000000 ffffffff02440101 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888091357b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 ffff888091357c00: f1 f1 f1 f1 f1 04 f2 00 f2 f2 f2 00 f2 f2 f2 00 >ffff888091357c80: 00 00 00 00 00 04 f3 f3 f3 f3 f3 00 00 00 00 00 ^ ffff888091357d00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ffff888091357d80: 00 f2 f2 f2 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 ==================================================================