Commit Diff
- Commit:
669713d43f8a014ba481265d4c58c3fe575527b4
- From:
- Ray Lai <ray@raylai.com>
- Via:
- Gleydson Soares <gsoares@gmail.com>
- Date:
- Message:
- 9term: Add missing parentheses, preventing buffer overflow. (el-sr) is the string length and (sizeof wdir - strlen(name) - 20) is the buffer size. When the string length is greater than the buffer size, the beginning of the string is supposed to be trimmed to fit in the buffer size. Unfortunately a pair of parentheses were missing, pointing sr outside the buffer, and the for loop below then reads outside the buffer. For certain binary data printed in a window, it causes a segfault. Change-Id: Iffeaa348260ee2a5a36d9577308fb8d1c1688d05 Reviewed-on: https://plan9port-review.googlesource.com/1540 Reviewed-by: Gleydson Soares <gsoares@gmail.com>
- Actions:
- Patch | Tree
--- src/cmd/9term/win.c +++ src/cmd/9term/win.c @@ -634,7 +634,7 @@ label(char *sr, int n) el = r+1; if(el-sr > sizeof wdir - strlen(name) - 20) - sr = el - sizeof wdir - strlen(name) - 20; + sr = el - (sizeof wdir - strlen(name) - 20); for(sl=el-3; sl>=sr; sl--) if(sl[0]=='\033' && sl[1]==']' && sl[2]==';') break;