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[Qemu-devel] [PATCH] contrib/elf2dmp: add kernel start address checking

From: Viktor Prutyanov
Subject: [Qemu-devel] [PATCH] contrib/elf2dmp: add kernel start address checking
Date: Wed, 20 Feb 2019 00:19:36 +0300

Before this patch, if elf2dmp failed to find NT kernel PE magic in
allowed virtual address range, then it assumes NULL as NT kernel
address and cause segfault.

This patch fix the problem described above by checking NT kernel address
before futher processing.

Signed-off-by: Viktor Prutyanov <address@hidden>
 contrib/elf2dmp/main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/contrib/elf2dmp/main.c b/contrib/elf2dmp/main.c
index 1a45eaf565..1bfeb89ba7 100644
--- a/contrib/elf2dmp/main.c
+++ b/contrib/elf2dmp/main.c
@@ -524,6 +524,12 @@ int main(int argc, char *argv[])
+    if (!nt_start_addr) {
+        eprintf("Failed to find NT kernel image\n");
+        err = 1;
+        goto out_ps;
+    }
     printf("KernBase = 0x%016"PRIx64", signature is \'%.2s\'\n", KernBase,
             (char *)nt_start_addr);

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