Subject: [PATCH] driver: gpu: add failure check for ftell

[沈言峰 <shenyanfeng@xxxxxxxxxx>]

add return-value check of ftell to improve robustness(and avoid abnormal behavior)

Signed-off-by: SPeak <speakshen@xxxxxxx>

Signed-off-by: shenyanfeng <shenyanfeng@xxxxxxxxxx>

---

 drivers/gpu/drm/radeon/mkregtable.c | 5 +++--

 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/mkregtable.c b/drivers/gpu/drm/radeon/mkregtable.c

index 52a7246fe..c31c58e5f 100644

--- a/drivers/gpu/drm/radeon/mkregtable.c

+++ b/drivers/gpu/drm/radeon/mkregtable.c

@@ -193,6 +193,7 @@ static int parser_auth(struct table *t, const char *filename)

  regmatch_t match[4];

  char buf[1024];

  size_t end;

+ long pos;

  int len;

  int done = 0;

  int r;

@@ -228,12 +229,12 @@ static int parser_auth(struct table *t, const char *filename)

  last_reg = strtol(last_reg_s, NULL, 16);

 

  do {

- if (fgets(buf, 1024, file) == NULL) {

+ if ((fgets(buf, 1024, file) == NULL) || (pos = ftell(file)) < 0) {

  fclose(file);

  return -1;

  }

  len = strlen(buf);

- if (ftell(file) == end)

+ if (pos == end)

  done = 1;

  if (len) {

  r = regexec(&mask_rex, buf, 4, match, 0);

-- 

2.37.2

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