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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2010-06-14 13:33:39 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2010-06-14 13:54:31 +0300
commitd1c12c6f45db38c7c8264ac9cda25bc05bfda430 (patch)
tree106d9e450ed07bce16ab0f2a6c9208f21be0da1e /ubi-utils
parent5e77e9d5a72d4f7bafc74373d5e44a106a369ceb (diff)
libubigen: do not create huge arrays on stack
Stop creating 128KiB and larger arrays on stack - allocate RAM using malloc() instead. This patch also teaches libubigen to always set errno. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'ubi-utils')
-rw-r--r--ubi-utils/src/libubigen.c68
1 files changed, 51 insertions, 17 deletions
diff --git a/ubi-utils/src/libubigen.c b/ubi-utils/src/libubigen.c
index db58cae..b090b14 100644
--- a/ubi-utils/src/libubigen.c
+++ b/ubi-utils/src/libubigen.c
@@ -117,13 +117,19 @@ int ubigen_add_volume(const struct ubigen_info *ui,
struct ubi_vtbl_record *vtbl_rec = &vtbl[vi->id];
uint32_t tmp;
- if (vi->id >= ui->max_volumes)
- return errmsg("too high volume id %d, max. volumes is %d",
- vi->id, ui->max_volumes);
+ if (vi->id >= ui->max_volumes) {
+ errmsg("too high volume id %d, max. volumes is %d",
+ vi->id, ui->max_volumes);
+ errno = EINVAL;
+ return -1;
+ }
- if (vi->alignment >= ui->leb_size)
- return errmsg("too large alignment %d, max is %d (LEB size)",
- vi->alignment, ui->leb_size);
+ if (vi->alignment >= ui->leb_size) {
+ errmsg("too large alignment %d, max is %d (LEB size)",
+ vi->alignment, ui->leb_size);
+ errno = EINVAL;
+ return -1;
+ }
memset(vtbl_rec, 0, sizeof(struct ubi_vtbl_record));
tmp = (vi->bytes + ui->leb_size - 1) / ui->leb_size;
@@ -225,15 +231,31 @@ int ubigen_write_volume(const struct ubigen_info *ui,
long long bytes, int in, int out)
{
int len = vi->usable_leb_size, rd, lnum = 0;
- char inbuf[ui->leb_size], outbuf[ui->peb_size];
+ char *inbuf, *outbuf;
- if (vi->id >= ui->max_volumes)
- return errmsg("too high volume id %d, max. volumes is %d",
- vi->id, ui->max_volumes);
+ if (vi->id >= ui->max_volumes) {
+ errmsg("too high volume id %d, max. volumes is %d",
+ vi->id, ui->max_volumes);
+ errno = EINVAL;
+ return -1;
+ }
- if (vi->alignment >= ui->leb_size)
- return errmsg("too large alignment %d, max is %d (LEB size)",
- vi->alignment, ui->leb_size);
+ if (vi->alignment >= ui->leb_size) {
+ errmsg("too large alignment %d, max is %d (LEB size)",
+ vi->alignment, ui->leb_size);
+ errno = EINVAL;
+ return -1;
+ }
+
+ inbuf = malloc(ui->leb_size);
+ if (!inbuf)
+ return sys_errmsg("cannot allocate %d bytes of memory",
+ ui->leb_size);
+ outbuf = malloc(ui->peb_size);
+ if (!outbuf) {
+ sys_errmsg("cannot allocate %d bytes of memory", ui->peb_size);
+ goto out_free;
+ }
memset(outbuf, 0xFF, ui->data_offs);
ubigen_init_ec_hdr(ui, (struct ubi_ec_hdr *)outbuf, ec);
@@ -249,8 +271,10 @@ int ubigen_write_volume(const struct ubigen_info *ui,
l = len;
do {
rd = read(in, inbuf + len - l, l);
- if (rd != l)
- return sys_errmsg("cannot read %d bytes from the input file", l);
+ if (rd != l) {
+ sys_errmsg("cannot read %d bytes from the input file", l);
+ goto out_free1;
+ }
l -= rd;
} while (l);
@@ -262,13 +286,23 @@ int ubigen_write_volume(const struct ubigen_info *ui,
memset(outbuf + ui->data_offs + len, 0xFF,
ui->peb_size - ui->data_offs - len);
- if (write(out, outbuf, ui->peb_size) != ui->peb_size)
- return sys_errmsg("cannot write %d bytes to the output file", ui->peb_size);
+ if (write(out, outbuf, ui->peb_size) != ui->peb_size) {
+ sys_errmsg("cannot write %d bytes to the output file", ui->peb_size);
+ goto out_free1;
+ }
lnum += 1;
}
+ free(outbuf);
+ free(inbuf);
return 0;
+
+out_free1:
+ free(outbuf);
+out_free:
+ free(inbuf);
+ return -1;
}
/**