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| author |   Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2009-09-11 10:28:59 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-09-11 10:29:53 +0200 |
| commit | f64d04c042193183c6dad98944ae2861b998e8b7 (patch) | |
| tree | d275472a5559e0333c8c55dfe418e3e30108b8bc /arch | |
| parent | [S390] Initialize __LC_THREAD_INFO early. (diff) | |
| download | linux-dev-f64d04c042193183c6dad98944ae2861b998e8b7.tar.xz linux-dev-f64d04c042193183c6dad98944ae2861b998e8b7.zip | |
[S390] s390dbf: Add description for usage of "%s" in sprintf events
Using "%s" in sprintf event functions is dangerous. This patch adds a short
description for this issue to the s390 debug feature documentation.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/debug.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/s390/include/asm/debug.h b/arch/s390/include/asm/debug.h index 31ed5686a968..18124b75a7ab 100644 --- a/arch/s390/include/asm/debug.h +++ b/arch/s390/include/asm/debug.h @@ -167,6 +167,10 @@ debug_text_event(debug_info_t* id, int level, const char* txt) return debug_event_common(id,level,txt,strlen(txt)); } +/* + * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are + * stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details! + */ extern debug_entry_t * debug_sprintf_event(debug_info_t* id,int level,char *string,...) __attribute__ ((format(printf, 3, 4))); @@ -206,7 +210,10 @@ debug_text_exception(debug_info_t* id, int level, const char* txt) return debug_exception_common(id,level,txt,strlen(txt)); } - +/* + * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are + * stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details! + */ extern debug_entry_t * debug_sprintf_exception(debug_info_t* id,int level,char *string,...) __attribute__ ((format(printf, 3, 4))); |