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MFV r325605: 8713 Buffer overflow in dsl_dataset_name()

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illumos/illumos-gate@f37ae9a714
f37ae9a714

https://www.illumos.org/issues/8713
  If we're creating a pool with version >= SPA_VERSION_DSL_SCRUB (v11) we need to
  account for additional space needed by the origin dataset which will also be
  snapshotted: "poolname"+"/"+"$ORIGIN"+"@"+"$ORIGIN".
  Enforce this limit in pool_namecheck().

Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@joyent.com>
Author: loli10K <ezomori.nozomu@gmail.com>

MFC after:	1 week
This commit is contained in:
avg 2017-11-09 18:12:21 +00:00
parent e24581a972
commit eb86daaed9
1 changed files with 8 additions and 1 deletions
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9
sys/cddl/contrib/opensolaris/common/zfs/zfs_namecheck.c
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@ -44,6 +44,7 @@
#include <string.h>
#endif
#include <sys/dsl_dir.h>
#include <sys/param.h>
#include <sys/nvpair.h>
#include "zfs_namecheck.h"
@ -301,8 +302,14 @@ pool_namecheck(const char *pool, namecheck_err_t *why, char *what)
/*
* Make sure the name is not too long.
* If we're creating a pool with version >= SPA_VERSION_DSL_SCRUB (v11)
* we need to account for additional space needed by the origin ds which
* will also be snapshotted: "poolname"+"/"+"$ORIGIN"+"@"+"$ORIGIN".
* Play it safe and enforce this limit even if the pool version is < 11
* so it can be upgraded without issues.
*/
if (strlen(pool) >= ZFS_MAX_DATASET_NAME_LEN) {
if (strlen(pool) >= (ZFS_MAX_DATASET_NAME_LEN - 2 -
strlen(ORIGIN_DIR_NAME) * 2)) {
if (why)
*why = NAME_ERR_TOOLONG;
return (-1);