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new 160737cf0d fftools/opt_common: fix format string bug in
print_program_info
160737cf0d is described below
commit 160737cf0da1915d8499881a8021d170f927411d
Author: Zhao Zhili <[email protected]>
AuthorDate: Mon Jul 6 20:17:13 2026 +0800
Commit: Zhao Zhili <[email protected]>
CommitDate: Tue Jul 7 02:39:49 2026 +0000
fftools/opt_common: fix format string bug in print_program_info
FFMPEG_CONFIGURATION and FFMPEG_VERSION were concatenated into av_log
format strings, so any % in them was interpreted as a conversion
specifier and consumed unrelated varargs, causing undefined behavior
ranging from garbled output to a segfault on `ffmpeg -version`. Pass
both as %s arguments instead.
Fixes issue #23662.
The FFMPEG_CONFIGURATION fix is based on a patch by FinnRG; the
FFMPEG_VERSION case is fixed here as well.
Signed-off-by: Zhao Zhili <[email protected]>
---
fftools/opt_common.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fftools/opt_common.c b/fftools/opt_common.c
index 82b3cf2464..572cc563e3 100644
--- a/fftools/opt_common.c
+++ b/fftools/opt_common.c
@@ -201,14 +201,14 @@ static void print_program_info(int flags, int level)
{
const char *indent = flags & INDENT? " " : "";
- av_log(NULL, level, "%s version " FFMPEG_VERSION, program_name);
+ av_log(NULL, level, "%s version %s", program_name, FFMPEG_VERSION);
if (flags & SHOW_COPYRIGHT)
av_log(NULL, level, " Copyright (c) %d-%d the FFmpeg developers",
program_birth_year, CONFIG_THIS_YEAR);
av_log(NULL, level, "\n");
av_log(NULL, level, "%sbuilt with %s\n", indent, CC_IDENT);
- av_log(NULL, level, "%sconfiguration: " FFMPEG_CONFIGURATION "\n", indent);
+ av_log(NULL, level, "%sconfiguration: %s\n", indent, FFMPEG_CONFIGURATION);
}
static void print_buildconf(int flags, int level)
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