| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /// PTR_ERR should be applied before its argument is reassigned, typically |
| 2 | /// to NULL |
| 3 | /// |
| 4 | // Confidence: High |
| 5 | // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. GPLv2. |
| 6 | // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. GPLv2. |
| 7 | // URL: http://coccinelle.lip6.fr/ |
| 8 | // Comments: |
| 9 | // Options: --no-includes --include-headers |
| 10 | |
| 11 | virtual org |
| 12 | virtual report |
| 13 | virtual context |
| 14 | |
| 15 | @r exists@ |
| 16 | expression e,e1; |
| 17 | constant c; |
| 18 | position p1,p2; |
| 19 | @@ |
| 20 | |
| 21 | *e@p1 = c |
| 22 | ... when != e = e1 |
| 23 | when != &e |
| 24 | when != true IS_ERR(e) |
| 25 | *PTR_ERR@p2(e) |
| 26 | |
| 27 | @script:python depends on org@ |
| 28 | p1 << r.p1; |
| 29 | p2 << r.p2; |
| 30 | @@ |
| 31 | |
| 32 | cocci.print_main("PTR_ERR",p2) |
| 33 | cocci.print_secs("assignment",p1) |
| 34 | |
| 35 | @script:python depends on report@ |
| 36 | p1 << r.p1; |
| 37 | p2 << r.p2; |
| 38 | @@ |
| 39 | |
| 40 | msg = "ERROR: PTR_ERR applied after initialization to constant on line %s" % (p1[0].line) |
| 41 | coccilib.report.print_report(p2[0],msg) |