random: sshd: uninitialized urandom read (32 bytes read) audit: type=1400 audit(1571043757.987:36): avc: denied { map } for pid=6969 comm="syz-executor323" path="/root/syz-executor323863313" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 ================================================================== BUG: unable to handle kernel NULL pointer dereference BUG: KASAN: null-ptr-deref in memcpy include/linux/string.h:347 [inline] BUG: KASAN: null-ptr-deref in llcp_sock_getname+0x38f/0x4a0 net/nfc/llcp_sock.c:532 Read of size 3 at addr (null) by task syz-executor323/6978 at (null) IP: memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 CPU: 0 PID: 6978 Comm: syz-executor323 Not tainted 4.14.149 #0 PGD 92f8b067 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 P4D 92f8b067 Call Trace: PUD a63a2067 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 PMD 0 kasan_report_error mm/kasan/report.c:349 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0x127/0x2af mm/kasan/report.c:393 Oops: 0000 [#1] PREEMPT SMP KASAN check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 Modules linked in: memcpy+0x24/0x50 mm/kasan/kasan.c:302 CPU: 1 PID: 6976 Comm: syz-executor323 Not tainted 4.14.149 #0 memcpy include/linux/string.h:347 [inline] llcp_sock_getname+0x38f/0x4a0 net/nfc/llcp_sock.c:532 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880938dc080 task.stack: ffff888099a30000 SYSC_getpeername+0x120/0x270 net/socket.c:1715 RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 RSP: 0018:ffff888099a37d20 EFLAGS: 00010246 RAX: ffff888099a37e0a RBX: ffff888099a37df8 RCX: 0000000000000003 RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff888099a37e0a RBP: ffff888099a37d40 R08: 1ffff11013346fc1 R09: ffffed1013346fc2 R10: ffffed1013346fc1 R11: ffff888099a37e0c R12: 0000000000000003 R13: ffff888099a37e0a R14: 0000000000000000 R15: ffffffff87068700 FS: 0000000001b9d880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009bc15000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy include/linux/string.h:347 [inline] llcp_sock_getname+0x38f/0x4a0 net/nfc/llcp_sock.c:532 SYSC_getpeername+0x120/0x270 net/socket.c:1715 SyS_getpeername+0x24/0x30 net/socket.c:1699 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 SyS_getpeername+0x24/0x30 net/socket.c:1699 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x441299 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 RSP: 002b:00007ffe6da2e4d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441299 RIP: 0033:0x441299 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RSP: 002b:00007ffe6da2e4d8 EFLAGS: 00000246 RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 ORIG_RAX: 0000000000000034 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441299 R13: 00000000004020a0 R14: 0000000000000000 R15: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 Code: RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 90 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402010 90 R13: 00000000004020a0 R14: 0000000000000000 R15: 0000000000000000 90 ================================================================== 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 RIP: memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 RSP: ffff888099a37d20 CR2: 0000000000000000 BUG: unable to handle kernel NULL pointer dereference at (null) IP: memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 PGD 9bd05067 P4D 9bd05067 PUD a61c2067 PMD 0 Oops: 0000 [#2] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 7017 Comm: syz-executor323 Tainted: G B D 4.14.149 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a962a240 task.stack: ffff888098ad8000 RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 RSP: 0018:ffff888098adfd20 EFLAGS: 00010246 RAX: ffff888098adfe0a RBX: ffff888098adfdf8 RCX: 0000000000000003 RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffff888098adfe0a RBP: ffff888098adfd40 R08: 1ffff1101315bfc1 R09: ffffed101315bfc2 R10: ffffed101315bfc1 R11: ffff888098adfe0c R12: 0000000000000003 R13: ffff888098adfe0a R14: 0000000000000000 R15: ffffffff87068700 FS: 0000000001b9d880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009f4c3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy include/linux/string.h:347 [inline] llcp_sock_getname+0x38f/0x4a0 net/nfc/llcp_sock.c:532 SYSC_getpeername+0x120/0x270 net/socket.c:1715 SyS_getpeername+0x24/0x30 net/socket.c:1699 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x441299 RSP: 002b:00007ffe6da2e4d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000034 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441299 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000000a209 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402010 R13: 00000000004020a0 R14: 0000000000000000 R15: 0000000000000000 Code: 90 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 RIP: memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:54 RSP: ffff888098adfd20 CR2: 0000000000000000 BUG: unable to handle kernel NULL pointer dereference at (null)