3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Liu ShuoX <shuox.liu@xxxxxxxxx> commit aa9a4a1edfbd3d223af01db833da2f07850bc655 upstream. In ramoops_pstore_read, a valid prz pointer with zero size buffer will break traverse of all persistent ram buffers. The latter buffer might be lost. Signed-off-by: Liu ShuoX <shuox.liu@xxxxxxxxx> Cc: "Zhang, Yanmin" <yanmin_zhang@xxxxxxxxxxxxxxx> Cc: Colin Cross <ccross@xxxxxxxxxxx> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx> Cc: HuKeping <hukeping@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/pstore/ram.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -126,12 +126,12 @@ ramoops_get_next_prz(struct persistent_r prz = przs[i]; - if (update) { - /* Update old/shadowed buffer. */ + /* Update old/shadowed buffer. */ + if (update) persistent_ram_save_old(prz); - if (!persistent_ram_old_size(prz)) - return NULL; - } + + if (!persistent_ram_old_size(prz)) + return NULL; *typep = type; *id = i; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html