Commit a94cdd1f authored by Jiri Slaby's avatar Jiri Slaby Committed by Linus Torvalds

Char: ipmi_bt_sm, fix infinite loop

In read_all_bytes, we do

  unsigned char i;
  bt->read_data[0] = BMC2HOST;
  bt->read_count = bt->read_data[0];
  for (i = 1; i <= bt->read_count; i++)
    bt->read_data[i] = BMC2HOST;

If bt->read_data[0] == bt->read_count == 255, we loop infinitely in the
'for' loop.  Make 'i' an 'int' instead of 'char' to get rid of the
overflow and finish the loop after 255 iterations every time.
Signed-off-by: default avatarJiri Slaby <>
Reported-and-debugged-by: default avatarRui Hui Dian <>
Cc: Tomas Cech <>
Cc: Corey Minyard <>
Cc: <>
Signed-off-by: default avatarCorey Minyard <>
Signed-off-by: default avatarLinus Torvalds <>
parent c9eaa447
......@@ -352,7 +352,7 @@ static inline void write_all_bytes(struct si_sm_data *bt)
static inline int read_all_bytes(struct si_sm_data *bt)
unsigned char i;
unsigned int i;
* length is "framing info", minimum = 4: NetFn, Seq, Cmd, cCode.
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