Sometimes kwboot after quitting terminal prints error message:
terminal: Bad address
This is caused by trying to call write() syscall with count of (size_t)-1 bytes.
When quit sequence is split into more read() calls then number of input bytes (nin) at the end of cycle can underflow and be negative. Fix it.
Fixes: de7514046ea5 ("tools: kwboot: Fix detection of quit esc sequence") Signed-off-by: Pali Rohár pali@kernel.org --- tools/kwboot.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/kwboot.c b/tools/kwboot.c index 68c0ef1f1b07..2d2d545d8258 100644 --- a/tools/kwboot.c +++ b/tools/kwboot.c @@ -1197,7 +1197,7 @@ kwboot_term_pipe(int in, int out, const char *quit, int *s) if (buf[i] == quit[*s]) { (*s)++; if (!quit[*s]) { - nin = i - *s; + nin = (i > *s) ? (i - *s) : 0; break; } } else { @@ -1208,7 +1208,7 @@ kwboot_term_pipe(int in, int out, const char *quit, int *s) }
if (i == nin) - nin -= *s; + nin -= (nin > *s) ? *s : nin; }
if (kwboot_write(out, buf, nin) < 0)