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| author | Petr Mladek <pmladek@suse.com> | 2019-04-17 13:53:49 +0200 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2019-04-26 16:21:03 +0200 |
| commit | 635720ac75a51092b456bed517ff170047883252 (patch) | |
| tree | 9f458a2c4488835f3935301a87d976c04d4f2532 /Documentation/core-api | |
| parent | vsprintf: Prevent crash when dereferencing invalid pointers (diff) | |
| download | linux-635720ac75a51092b456bed517ff170047883252.tar.xz linux-635720ac75a51092b456bed517ff170047883252.zip | |
vsprintf: Avoid confusion between invalid address and value
We are able to detect invalid values handled by %p[iI] printk specifier.
The current error message is "invalid address". It might cause confusion
against "(efault)" reported by the generic valid_pointer_address() check.
Let's unify the style and use the more appropriate error code description
"(einval)".
Link: http://lkml.kernel.org/r/20190417115350.20479-10-pmladek@suse.com
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Tobin C . Harding" <me@tobin.cc>
Cc: Joe Perches <joe@perches.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'Documentation/core-api')
| -rw-r--r-- | Documentation/core-api/printk-formats.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index b2cac8d76b66..75d2bbe9813f 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -64,6 +64,7 @@ might be printed instead of the unreachable information:: (null) data on plain NULL address (efault) data on invalid address + (einval) invalid data on a valid address Plain Pointers -------------- |