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-rw-r--r--gnu/packages/patches/qemu-CVE-2017-5856.patch68
1 files changed, 68 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2017-5856.patch b/gnu/packages/patches/qemu-CVE-2017-5856.patch
new file mode 100644
index 0000000000..bee0824c0a
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2017-5856.patch
@@ -0,0 +1,68 @@
+http://git.qemu.org/?p=qemu.git;a=patch;h=765a707000e838c30b18d712fe6cb3dd8e0435f3
+this patch is from qemu-git.
+
+
+From 765a707000e838c30b18d712fe6cb3dd8e0435f3 Mon Sep 17 00:00:00 2001
+From: Paolo Bonzini <pbonzini@redhat.com>
+Date: Mon, 2 Jan 2017 11:03:33 +0100
+Subject: [PATCH] megasas: fix guest-triggered memory leak
+
+If the guest sets the sglist size to a value >=2GB, megasas_handle_dcmd
+will return MFI_STAT_MEMORY_NOT_AVAILABLE without freeing the memory.
+Avoid this by returning only the status from map_dcmd, and loading
+cmd->iov_size in the caller.
+
+Reported-by: Li Qiang <liqiang6-s@360.cn>
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+---
+ hw/scsi/megasas.c | 11 ++++++-----
+ 1 files changed, 6 insertions(+), 5 deletions(-)
+
+diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
+index 67fc1e7..6233865 100644
+--- a/hw/scsi/megasas.c
++++ b/hw/scsi/megasas.c
+@@ -683,14 +683,14 @@ static int megasas_map_dcmd(MegasasState *s, MegasasCmd *cmd)
+ trace_megasas_dcmd_invalid_sge(cmd->index,
+ cmd->frame->header.sge_count);
+ cmd->iov_size = 0;
+- return -1;
++ return -EINVAL;
+ }
+ iov_pa = megasas_sgl_get_addr(cmd, &cmd->frame->dcmd.sgl);
+ iov_size = megasas_sgl_get_len(cmd, &cmd->frame->dcmd.sgl);
+ pci_dma_sglist_init(&cmd->qsg, PCI_DEVICE(s), 1);
+ qemu_sglist_add(&cmd->qsg, iov_pa, iov_size);
+ cmd->iov_size = iov_size;
+- return cmd->iov_size;
++ return 0;
+ }
+
+ static void megasas_finish_dcmd(MegasasCmd *cmd, uint32_t iov_size)
+@@ -1559,19 +1559,20 @@ static const struct dcmd_cmd_tbl_t {
+
+ static int megasas_handle_dcmd(MegasasState *s, MegasasCmd *cmd)
+ {
+- int opcode, len;
++ int opcode;
+ int retval = 0;
++ size_t len;
+ const struct dcmd_cmd_tbl_t *cmdptr = dcmd_cmd_tbl;
+
+ opcode = le32_to_cpu(cmd->frame->dcmd.opcode);
+ trace_megasas_handle_dcmd(cmd->index, opcode);
+- len = megasas_map_dcmd(s, cmd);
+- if (len < 0) {
++ if (megasas_map_dcmd(s, cmd) < 0) {
+ return MFI_STAT_MEMORY_NOT_AVAILABLE;
+ }
+ while (cmdptr->opcode != -1 && cmdptr->opcode != opcode) {
+ cmdptr++;
+ }
++ len = cmd->iov_size;
+ if (cmdptr->opcode == -1) {
+ trace_megasas_dcmd_unhandled(cmd->index, opcode, len);
+ retval = megasas_dcmd_dummy(s, cmd);
+--
+1.7.0.4
+