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-rw-r--r--hw/i386/pc.c2
-rw-r--r--hw/mips/cps.c2
-rw-r--r--hw/nvram/fw_cfg.c2
-rw-r--r--hw/ppc/spapr_cpu_core.c2
-rw-r--r--hw/vfio/platform.c2
-rw-r--r--kvm-all.c2
-rw-r--r--qemu-img.c4
-rwxr-xr-xscripts/checkpatch.pl5
-rw-r--r--scripts/coccinelle/err-bad-newline.cocci29
-rw-r--r--slirp/slirp.c8
-rw-r--r--target-i386/kvm.c2
-rw-r--r--ui/vnc.c2
12 files changed, 47 insertions, 15 deletions
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 47593b741a..022dd1b205 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -381,7 +381,7 @@ ISADevice *pc_find_fdc0(void)
         error_report("warning: multiple floppy disk controllers with "
                      "iobase=0x3f0 have been found");
         error_printf("the one being picked for CMOS setup might not reflect "
-                     "your intent");
+                     "your intent\n");
     }
 
     return state.floppy;
diff --git a/hw/mips/cps.c b/hw/mips/cps.c
index 77c621797a..4ef337d5c4 100644
--- a/hw/mips/cps.c
+++ b/hw/mips/cps.c
@@ -73,7 +73,7 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < s->num_vp; i++) {
         cpu = cpu_mips_init(s->cpu_model);
         if (cpu == NULL) {
-            error_setg(errp, "%s: CPU initialization failed\n",  __func__);
+            error_setg(errp, "%s: CPU initialization failed",  __func__);
             return;
         }
 
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index f10d5ec9c8..6a68e594d5 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -744,7 +744,7 @@ static int get_fw_cfg_order(FWCfgState *s, const char *name)
     }
 
     /* Stick unknown stuff at the end. */
-    error_report("warning: Unknown firmware file in legacy mode: %s\n", name);
+    error_report("warning: Unknown firmware file in legacy mode: %s", name);
     return FW_CFG_ORDER_OVERRIDE_LAST;
 }
 
diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
index 704803ac23..716f7c44cd 100644
--- a/hw/ppc/spapr_cpu_core.c
+++ b/hw/ppc/spapr_cpu_core.c
@@ -231,7 +231,7 @@ void spapr_core_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
     }
 
     if (cc->core_id % smp_threads) {
-        error_setg(&local_err, "invalid core id %d\n", cc->core_id);
+        error_setg(&local_err, "invalid core id %d", cc->core_id);
         goto out;
     }
 
diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index 1798a00a3f..a559e7b659 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -496,7 +496,7 @@ static int vfio_populate_device(VFIODevice *vbasedev)
         irq.index = i;
         ret = ioctl(vbasedev->fd, VFIO_DEVICE_GET_IRQ_INFO, &irq);
         if (ret) {
-            error_printf("vfio: error getting device %s irq info",
+            error_report("vfio: error getting device %s irq info",
                          vbasedev->name);
             goto irq_err;
         } else {
diff --git a/kvm-all.c b/kvm-all.c
index 65608def36..ebf35b0c5b 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -2143,7 +2143,7 @@ void kvm_device_access(int fd, int group, uint64_t attr,
     if (err < 0) {
         error_report("KVM_%s_DEVICE_ATTR failed: %s",
                      write ? "SET" : "GET", strerror(-err));
-        error_printf("Group %d attr 0x%016" PRIx64, group, attr);
+        error_printf("Group %d attr 0x%016" PRIx64 "\n", group, attr);
         abort();
     }
 }
diff --git a/qemu-img.c b/qemu-img.c
index 2e40e1fc84..d2865a589e 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3490,7 +3490,7 @@ typedef struct BenchData {
 static void bench_undrained_flush_cb(void *opaque, int ret)
 {
     if (ret < 0) {
-        error_report("Failed flush request: %s\n", strerror(-ret));
+        error_report("Failed flush request: %s", strerror(-ret));
         exit(EXIT_FAILURE);
     }
 }
@@ -3501,7 +3501,7 @@ static void bench_cb(void *opaque, int ret)
     BlockAIOCB *acb;
 
     if (ret < 0) {
-        error_report("Failed request: %s\n", strerror(-ret));
+        error_report("Failed request: %s", strerror(-ret));
         exit(EXIT_FAILURE);
     }
 
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b7cb4ab478..9297087212 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2514,11 +2514,14 @@ sub process {
 	my $qemu_error_funcs = qr{error_setg|
 				error_setg_errno|
 				error_setg_win32|
+				error_setg_file_open|
 				error_set|
+				error_prepend|
+				error_reportf_err|
 				error_vreport|
 				error_report}x;
 
-	if ($rawline =~ /\b(?:$qemu_error_funcs)\s*\(\s*\".*\\n/) {
+	if ($rawline =~ /\b(?:$qemu_error_funcs)\s*\(.*\".*\\n/) {
 		WARN("Error messages should not contain newlines\n" . $herecurr);
 	}
 
diff --git a/scripts/coccinelle/err-bad-newline.cocci b/scripts/coccinelle/err-bad-newline.cocci
new file mode 100644
index 0000000000..1316cc86a6
--- /dev/null
+++ b/scripts/coccinelle/err-bad-newline.cocci
@@ -0,0 +1,29 @@
+// Error messages should not contain newlines.  This script finds
+// messages that do.  Fixing them is manual.
+@r@
+expression errp, eno, cls, fmt;
+position p;
+@@
+(
+error_report(fmt, ...)@p
+|
+error_setg(errp, fmt, ...)@p
+|
+error_setg_errno(errp, eno, fmt, ...)@p
+|
+error_setg_win32(errp, eno, cls, fmt, ...)@p
+|
+error_prepend(errp, fmt, ...)@p
+|
+error_setg_file_open(errp, eno, cls, fmt, ...)@p
+|
+error_reportf_err(errp, fmt, ...)@p
+|
+error_set(errp, cls, fmt, ...)@p
+)
+@script:python@
+fmt << r.fmt;
+p << r.p;
+@@
+if "\\n" in str(fmt):
+    print "%s:%s:%s:%s" % (p[0].file, p[0].line, p[0].column, fmt)
diff --git a/slirp/slirp.c b/slirp/slirp.c
index 7eb183d0e9..47a1652952 100644
--- a/slirp/slirp.c
+++ b/slirp/slirp.c
@@ -1197,8 +1197,8 @@ static void slirp_socket_save(QEMUFile *f, struct socket *so)
         qemu_put_be16(f, so->so_fport);
         break;
     default:
-        error_report(
-                "so_ffamily unknown, unable to save so_faddr and so_fport\n");
+        error_report("so_ffamily unknown, unable to save so_faddr and"
+                     " so_fport");
     }
     qemu_put_be16(f, so->so_lfamily);
     switch (so->so_lfamily) {
@@ -1207,8 +1207,8 @@ static void slirp_socket_save(QEMUFile *f, struct socket *so)
         qemu_put_be16(f, so->so_lport);
         break;
     default:
-        error_report(
-                "so_ffamily unknown, unable to save so_laddr and so_lport\n");
+        error_report("so_ffamily unknown, unable to save so_laddr and"
+                     " so_lport");
     }
     qemu_put_byte(f, so->so_iptos);
     qemu_put_byte(f, so->so_emu);
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 9697e16fdd..0b2016a77a 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -3250,7 +3250,7 @@ int kvm_arch_irqchip_create(MachineState *ms, KVMState *s)
     if (machine_kernel_irqchip_split(ms)) {
         ret = kvm_vm_enable_cap(s, KVM_CAP_SPLIT_IRQCHIP, 0, 24);
         if (ret) {
-            error_report("Could not enable split irqchip mode: %s\n",
+            error_report("Could not enable split irqchip mode: %s",
                          strerror(-ret));
             exit(1);
         } else {
diff --git a/ui/vnc.c b/ui/vnc.c
index 4ce903429f..853b57e982 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -3201,7 +3201,7 @@ int vnc_display_password(const char *id, const char *password)
     }
     if (vs->auth == VNC_AUTH_NONE) {
         error_printf_unless_qmp("If you want use passwords please enable "
-                                "password auth using '-vnc ${dpy},password'.");
+                                "password auth using '-vnc ${dpy},password'.\n");
         return -EINVAL;
     }