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qemu-io: fix memory leak 

qemu-io leaks the request buffer whenever the read or write function isn't
executed completely down the "normal" code path.

[hch: also fix the aio and vectored variants the same way]

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Kevin Wolf 2009-07-10 13:33:52 +02:00 committed by Anthony Liguori
parent 9c4bab2668
commit 7d8abfcb50
1 changed files with 38 additions and 22 deletions
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60
qemu-io.c
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@ -358,7 +358,7 @@ read_f(int argc, char **argv)
if (cnt < 0) {
printf("read failed: %s\n", strerror(-cnt));
return 0;
goto out;
}
if (Pflag) {
@ -373,7 +373,7 @@ read_f(int argc, char **argv)
}
if (qflag)
return 0;
goto out;
if (vflag)
dump_buffer(buf, offset, count);
@ -382,6 +382,7 @@ read_f(int argc, char **argv)
t2 = tsub(t2, t1);
print_report("read", &t2, offset, count, total, cnt, Cflag);
out:
qemu_io_free(buf);
return 0;
@ -480,7 +481,7 @@ readv_f(int argc, char **argv)
if (cnt < 0) {
printf("readv failed: %s\n", strerror(-cnt));
return 0;
goto out;
}
if (Pflag) {
@ -495,7 +496,7 @@ readv_f(int argc, char **argv)
}
if (qflag)
return 0;
goto out;
if (vflag)
dump_buffer(buf, offset, qiov.size);
@ -504,8 +505,8 @@ readv_f(int argc, char **argv)
t2 = tsub(t2, t1);
print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
out:
qemu_io_free(buf);
return 0;
}
@ -613,16 +614,17 @@ write_f(int argc, char **argv)
if (cnt < 0) {
printf("write failed: %s\n", strerror(-cnt));
return 0;
goto out;
}
if (qflag)
return 0;
goto out;
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("wrote", &t2, offset, count, total, cnt, Cflag);
out:
qemu_io_free(buf);
return 0;
@ -713,18 +715,17 @@ writev_f(int argc, char **argv)
if (cnt < 0) {
printf("writev failed: %s\n", strerror(-cnt));
return 0;
goto out;
}
if (qflag)
return 0;
goto out;
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
out:
qemu_io_free(buf);
return 0;
}
@ -761,18 +762,18 @@ aio_write_done(void *opaque, int ret)
if (ret < 0) {
printf("aio_write failed: %s\n", strerror(-ret));
return;
goto out;
}
if (ctx->qflag) {
return;
goto out;
}
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, ctx->t1);
print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
ctx->qiov.size, 1, ctx->Cflag);
out:
qemu_io_free(ctx->buf);
free(ctx);
}
@ -789,7 +790,7 @@ aio_read_done(void *opaque, int ret)
if (ret < 0) {
printf("readv failed: %s\n", strerror(-ret));
return;
goto out;
}
if (ctx->Pflag) {
@ -805,7 +806,7 @@ aio_read_done(void *opaque, int ret)
}
if (ctx->qflag) {
return;
goto out;
}
if (ctx->vflag) {
@ -816,7 +817,7 @@ aio_read_done(void *opaque, int ret)
t2 = tsub(t2, ctx->t1);
print_report("read", &t2, ctx->offset, ctx->qiov.size,
ctx->qiov.size, 1, ctx->Cflag);
out:
qemu_io_free(ctx->buf);
free(ctx);
}
@ -865,17 +866,20 @@ aio_read_f(int argc, char **argv)
ctx->vflag = 1;
break;
default:
free(ctx);
return command_usage(&aio_read_cmd);
}
}
if (optind > argc - 2)
if (optind > argc - 2) {
free(ctx);
return command_usage(&aio_read_cmd);
}
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
free(ctx);
return 0;
}
optind++;
@ -883,6 +887,7 @@ aio_read_f(int argc, char **argv)
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
free(ctx);
return 0;
}
@ -892,8 +897,11 @@ aio_read_f(int argc, char **argv)
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_read_done, ctx);
if (!acb)
if (!acb) {
free(ctx->buf);
free(ctx);
return -EIO;
}
return 0;
}
@ -952,16 +960,20 @@ aio_write_f(int argc, char **argv)
pattern = atoi(optarg);
break;
default:
free(ctx);
return command_usage(&aio_write_cmd);
}
}
if (optind > argc - 2)
if (optind > argc - 2) {
free(ctx);
return command_usage(&aio_write_cmd);
}
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
free(ctx);
return 0;
}
optind++;
@ -969,6 +981,7 @@ aio_write_f(int argc, char **argv)
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
free(ctx);
return 0;
}
@ -978,8 +991,11 @@ aio_write_f(int argc, char **argv)
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_write_done, ctx);
if (!acb)
if (!acb) {
free(ctx->buf);
free(ctx);
return -EIO;
}
return 0;
}