Useful to determine size of devcoreump before writing it out. Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx> --- drivers/gpu/drm/drm_print.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index cf24dfdeb6b2..a1a4de9f9c44 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -100,8 +100,9 @@ void __drm_puts_coredump(struct drm_printer *p, const char *str) copy = iterator->remain; /* Copy out the bit of the string that we need */ - memcpy(iterator->data, - str + (iterator->start - iterator->offset), copy); + if (iterator->data) + memcpy(iterator->data, + str + (iterator->start - iterator->offset), copy); iterator->offset = iterator->start + copy; iterator->remain -= copy; @@ -110,7 +111,8 @@ void __drm_puts_coredump(struct drm_printer *p, const char *str) len = min_t(ssize_t, strlen(str), iterator->remain); - memcpy(iterator->data + pos, str, len); + if (iterator->data) + memcpy(iterator->data + pos, str, len); iterator->offset += len; iterator->remain -= len; @@ -140,8 +142,9 @@ void __drm_printfn_coredump(struct drm_printer *p, struct va_format *vaf) if ((iterator->offset >= iterator->start) && (len < iterator->remain)) { ssize_t pos = iterator->offset - iterator->start; - snprintf(((char *) iterator->data) + pos, - iterator->remain, "%pV", vaf); + if (iterator->data) + snprintf(((char *) iterator->data) + pos, + iterator->remain, "%pV", vaf); iterator->offset += len; iterator->remain -= len; -- 2.34.1