From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
To: Andrew Morton <akpm@linux-foundation.org>,
Petr Mladek <pmladek@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: stable@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] lib/vsprintf.c: remove leftover 'f' and 'F' cases from bstr_printf()
Date: Fri, 23 Apr 2021 11:45:29 +0200 [thread overview]
Message-ID: <20210423094529.1862521-1-linux@rasmusvillemoes.dk> (raw)
Commit 9af7706492f9 ("lib/vsprintf: Remove support for %pF and %pf in
favour of %pS and %ps") removed support for %pF and %pf, and correctly
removed the handling of those cases in vbin_printf(). However, the
corresponding cases in bstr_printf() were left behind.
In the same series, %pf was re-purposed for dealing with
fwnodes (3bd32d6a2ee6, "lib/vsprintf: Add %pfw conversion specifier
for printing fwnode names").
So should anyone use %pf with the binary printf routines,
vbin_printf() would (correctly, as it involves dereferencing the
pointer) do the string formatting to the u32 array, but bstr_printf()
would not copy the string from the u32 array, but instead interpret
the first sizeof(void*) bytes of the formatted string as a pointer -
which generally won't end well (also, all subsequent get_args would be
out of sync).
Fixes: 9af7706492f9 ("lib/vsprintf: Remove support for %pF and %pf in favour of %pS and %ps")
Cc: stable@vger.kernel.org
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
lib/vsprintf.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 41ddc353ebb8..39ef2e314da5 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -3135,8 +3135,6 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
switch (*fmt) {
case 'S':
case 's':
- case 'F':
- case 'f':
case 'x':
case 'K':
case 'e':
--
2.29.2
next reply other threads:[~2021-04-23 9:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-23 9:45 Rasmus Villemoes [this message]
2021-04-23 10:01 ` [PATCH] lib/vsprintf.c: remove leftover 'f' and 'F' cases from bstr_printf() Sakari Ailus
2021-04-23 15:10 ` Petr Mladek
2021-04-26 13:07 ` Steven Rostedt
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