Commit b0aa931f authored by Liu ShuoX's avatar Liu ShuoX Committed by Tony Luck
Browse files

pstore: Fix NULL pointer fault if get NULL prz in ramoops_get_next_prz



ramoops_get_next_prz get the prz according the paramters. If it get a
uninitialized prz, access its members by following persistent_ram_old_size(prz)
will cause a NULL pointer crash.
Ex: if ftrace_size is 0, fprz will be NULL.

Fix it by return NULL in advance.

Signed-off-by: default avatarLiu ShuoX <shuox.liu@intel.com>
Acked-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent aa9a4a1e
......@@ -119,6 +119,8 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
return NULL;
prz = przs[i];
if (!prz)
return NULL;
/* Update old/shadowed buffer. */
if (update)
......
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