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storage: Fix crash when parsing backing store URI with schema

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The code that parses the schema from the URI touches the "hosts[0]"
member of the storage file source structure in case the URI contains a
schema. The hosts array was not yet allocated at the point in the code
where the transport protocol was parsed and set. This lead to a crash of
libvirtd.

Fix the code by allocating the "hosts" array upfront and add a test case
to verify this scenario. (Unfortunately this requires shuffling the test
case numbers too).

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1156288
This commit is contained in:
Peter Krempa 2014-10-29 10:55:23 +01:00
parent 85f2d0dd55
commit 98784369fd
2 changed files with 30 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/util/virstoragefile.c
View File

@ -2133,6 +2133,11 @@ virStorageSourceParseBackingURI(virStorageSourcePtr src,
goto cleanup;
}
if (VIR_ALLOC(src->hosts) < 0)
goto cleanup;
src->nhosts = 1;
if (!(scheme = virStringSplit(uri->scheme, "+", 2)))
goto cleanup;
@ -2183,11 +2188,6 @@ virStorageSourceParseBackingURI(virStorageSourcePtr src,
tmp[0] = '\0';
}
if (VIR_ALLOC(src->hosts) < 0)
goto cleanup;
src->nhosts = 1;
if (uri->port > 0) {
if (virAsprintf(&src->hosts->port, "%d", uri->port) < 0)
goto cleanup;

31
tests/virstoragetest.c
View File

@ -835,6 +835,25 @@ mymain(void)
(&qcow2, &nbd), EXP_PASS,
(&qcow2, &nbd), ALLOW_PROBE | EXP_PASS);
/* Rewrite qcow2 to use an nbd: protocol as backend */
virCommandFree(cmd);
cmd = virCommandNewArgList(qemuimg, "rebase", "-u", "-f", "qcow2",
"-F", "raw", "-b", "nbd+tcp://example.org:6000/blah",
"qcow2", NULL);
if (virCommandRun(cmd, NULL) < 0)
ret = -1;
qcow2.expBackingStoreRaw = "nbd+tcp://example.org:6000/blah";
/* Qcow2 file with backing protocol instead of file */
testFileData nbd2 = {
.path = "blah",
.type = VIR_STORAGE_TYPE_NETWORK,
.format = VIR_STORAGE_FILE_RAW,
};
TEST_CHAIN(12, absqcow2, VIR_STORAGE_FILE_QCOW2,
(&qcow2, &nbd2), EXP_PASS,
(&qcow2, &nbd2), ALLOW_PROBE | EXP_PASS);
/* qed file */
testFileData qed = {
.expBackingStoreRaw = absraw,
@ -848,7 +867,7 @@ mymain(void)
.type = VIR_STORAGE_TYPE_FILE,
.format = VIR_STORAGE_FILE_RAW,
};
TEST_CHAIN(12, absqed, VIR_STORAGE_FILE_AUTO,
TEST_CHAIN(13, absqed, VIR_STORAGE_FILE_AUTO,
(&qed_as_raw), EXP_PASS,
(&qed, &raw), ALLOW_PROBE | EXP_PASS);
@ -858,10 +877,10 @@ mymain(void)
.type = VIR_STORAGE_TYPE_DIR,
.format = VIR_STORAGE_FILE_DIR,
};
TEST_CHAIN(13, absdir, VIR_STORAGE_FILE_AUTO,
TEST_CHAIN(14, absdir, VIR_STORAGE_FILE_AUTO,
(&dir), EXP_PASS,
(&dir), ALLOW_PROBE | EXP_PASS);
TEST_CHAIN(14, absdir, VIR_STORAGE_FILE_DIR,
TEST_CHAIN(15, absdir, VIR_STORAGE_FILE_DIR,
(&dir), EXP_PASS,
(&dir), ALLOW_PROBE | EXP_PASS);
@ -900,7 +919,7 @@ mymain(void)
raw.path = datadir "/sub/../sub/../raw";
raw.pathRel = "../raw";
TEST_CHAIN(15, abslink2, VIR_STORAGE_FILE_QCOW2,
TEST_CHAIN(16, abslink2, VIR_STORAGE_FILE_QCOW2,
(&link2, &link1, &raw), EXP_PASS,
(&link2, &link1, &raw), ALLOW_PROBE | EXP_PASS);
#endif
@ -914,7 +933,7 @@ mymain(void)
qcow2.expBackingStoreRaw = "qcow2";
/* Behavior of an infinite loop chain */
TEST_CHAIN(16, absqcow2, VIR_STORAGE_FILE_QCOW2,
TEST_CHAIN(17, absqcow2, VIR_STORAGE_FILE_QCOW2,
(&qcow2), EXP_WARN,
(&qcow2), ALLOW_PROBE | EXP_WARN);
@ -933,7 +952,7 @@ mymain(void)
qcow2.expBackingStoreRaw = "wrap";
/* Behavior of an infinite loop chain */
TEST_CHAIN(17, abswrap, VIR_STORAGE_FILE_QCOW2,
TEST_CHAIN(18, abswrap, VIR_STORAGE_FILE_QCOW2,
(&wrap, &qcow2), EXP_WARN,
(&wrap, &qcow2), ALLOW_PROBE | EXP_WARN);