Opened 13 years ago
Last modified 8 years ago
#1322 new defect
DebCheck QA: Possible null pointer dereference
| Reported by: | hamish | Owned by: | |
|---|---|---|---|
| Priority: | normal | Milestone: | 6.4.6 |
| Component: | Compiling | Version: | 6.4.0 |
| Keywords: | lib/nviz, lib/ogsf, r3.stats, v.mapcalc | Cc: | |
| CPU: | Unspecified | Platform: | Linux |
Description
Hi,
Debian's run of the Cpp check tool automatically found a number of C-code errors (or potential errors) which need to be reviewed by hand. See grass-dev ML thread of 13 Jan 2011.
about: Cppcheck is a command-line tool that tries to detect bugs that your C/C++ compiler doesn't see. It is versatile, and can check non-standard code including various compiler extensions, inline assembly code, etc. Its internal preprocessor can handle includes, macros, and several preprocessor commands. While Cppcheck is highly configurable, you can start using it just by giving it a path to the source code.
http://www.linuxjournal.com/content/daca-could-mean-less-bugs-debian
the list of probably-bugs in the 6.4.0 C/C++ code:
http://qa.debian.org/daca/cppcheck/squeeze/grass_6.4.0~rc6+42329-3.html
CLI analysis program (not Debian specific):
I have split those 154 hits into 16 classes, and will report each class in an individual bug report.
Run against releasebranch6_4 r42329 (including all patches up to, but not beyond, 6.4.0-final)
This bug report is for: Possible null pointer dereference
- ./lib/nviz/render.c:122 [error] - Possible null pointer dereference: v - otherwise it is redundant to check if v is null at line 128
- ./lib/nviz/render.c:123 [error] - Possible null pointer dereference: v - otherwise it is redundant to check if v is null at line 128
- ./lib/ogsf/gv.c:184 [error] - Possible null pointer dereference: gv - otherwise it is redundant to check if gv is null at line 186
- ./lib/ogsf/gvl.c:188 [error] - Possible null pointer dereference: gvl - otherwise it is redundant to check if gvl is null at line 190
- ./raster3d/r3.stats/main.c:665 [error] - Possible null pointer dereference: eqvals - otherwise it is redundant to check if eqvals is null at line 672
- ./raster3d/r3.stats/main.c:668 [error] - Possible null pointer dereference: eqvals - otherwise it is redundant to check if eqvals is null at line 672
- ./vector/v.mapcalc/list.c:524 [error] - Possible null pointer dereference: item
- ./vector/v.mapcalc/list.c:525 [error] - Possible null pointer dereference: item
Modules: lib/nviz, lib/ogsf, r3.stats, v.mapcalc
