From ff61d1a4959065aa99d52489438f6737765987c6 Mon Sep 17 00:00:00 2001 From: LOLi Date: Wed, 29 Mar 2017 02:21:11 +0200 Subject: Check ashift validity in 'zpool add' df83110 added the ability to specify a custom "ashift" value from the command line in 'zpool add' and 'zpool attach'. This commit adds additional checks to the provided ashift to prevent invalid values from being used, which could result in disastrous consequences for the whole pool. Additionally provide ASHIFT_MAX and ASHIFT_MIN definitions in spa.h. Reviewed-by: Giuseppe Di Natale Reviewed-by: Brian Behlendorf Signed-off-by: loli10K Closes #5878 --- lib/libzfs/libzfs_pool.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'lib') diff --git a/lib/libzfs/libzfs_pool.c b/lib/libzfs/libzfs_pool.c index 616f5061f..16fff89e6 100644 --- a/lib/libzfs/libzfs_pool.c +++ b/lib/libzfs/libzfs_pool.c @@ -538,10 +538,13 @@ zpool_valid_proplist(libzfs_handle_t *hdl, const char *poolname, goto error; } - if (intval != 0 && (intval < 9 || intval > 13)) { + if (intval != 0 && + (intval < ASHIFT_MIN || intval > ASHIFT_MAX)) { zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, - "property '%s' number %d is invalid."), - propname, intval); + "invalid '%s=%d' property: only values " + "between %" PRId32 " and %" PRId32 " " + "are allowed.\n"), + propname, intval, ASHIFT_MIN, ASHIFT_MAX); (void) zfs_error(hdl, EZFS_BADPROP, errbuf); goto error; } -- cgit v1.2.3