The parisc architecture recently reimplemented the memcpy function and their reimplementation crashed when source and destination overlapped. The crash happened in the function ide_complete_cmd where memcpy is called with the same source and destination pointer. According to the C specification, memcpy behavior is undefined if the source and destination range overlaps. This patches fixes the undefined behavior. Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> --- drivers/ide/ide-io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-4.11-rc6/drivers/ide/ide-io.c =================================================================== --- linux-4.11-rc6.orig/drivers/ide/ide-io.c +++ linux-4.11-rc6/drivers/ide/ide-io.c @@ -107,7 +107,7 @@ void ide_complete_cmd(ide_drive_t *drive if (cmd->tf_flags & IDE_TFLAG_DYN) kfree(orig_cmd); - else + else if (cmd != orig_cmd) memcpy(orig_cmd, cmd, sizeof(*cmd)); } } -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
