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Fix bad kmem_free() in zvol_rename_minors_impl()

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Currently, zvol_rename_minors_impl() calls kmem_asprintf()
to allocate and initialize a string. This function is a thin
wrapper around the kernel's kvasprintf() and does not call
into the SPL's kmem tracking code when it is enabled. However,
this function frees the string with the tracked kmem_free()
instead of the untracked strfree(), which causes the SPL
kmem tracking code to believe that the function is attempting
to free memory it never allocated, triggering an ASSERT. This
patch simply corrects this issue.

Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #8307
This commit is contained in:
Tom Caputi 2019-01-23 14:38:05 -05:00 committed by Brian Behlendorf
parent 0a10863194
commit b5d693581d
1 changed files with 1 additions and 1 deletions
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2
module/zfs/zvol.c
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@ -2267,7 +2267,7 @@ zvol_rename_minors_impl(const char *oldname, const char *newname)
zv->zv_name[oldnamelen], zv->zv_name[oldnamelen],
zv->zv_name + oldnamelen + 1); zv->zv_name + oldnamelen + 1);
zvol_rename_minor(zv, name); zvol_rename_minor(zv, name);
kmem_free(name, strlen(name + 1)); strfree(name);
} }
mutex_exit(&zv->zv_state_lock); mutex_exit(&zv->zv_state_lock);