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| author | Amir Mohammad Jahangirzad <a.jahangirzad@gmail.com> | 2025-06-08 20:05:59 +0330 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 18:30:41 +0200 |
| commit | 62b4f6c6abe495e507103cfd00293730a7d54e6a (patch) | |
| tree | fcd5ab8663df6edd7d8b617f22fed9d7a275670d | |
| parent | 35782c32528d82aa21f84cb5ceb2abd3526a8159 (diff) | |
fs/orangefs: use snprintf() instead of sprintf()
[ Upstream commit cdfa1304657d6f23be8fd2bb0516380a3c89034e ]
sprintf() is discouraged for use with bounded destination buffers
as it does not prevent buffer overflows when the formatted output
exceeds the destination buffer size. snprintf() is a safer
alternative as it limits the number of bytes written and ensures
NUL-termination.
Replace sprintf() with snprintf() for copying the debug string
into a temporary buffer, using ORANGEFS_MAX_DEBUG_STRING_LEN as
the maximum size to ensure safe formatting and prevent memory
corruption in edge cases.
EDIT: After this patch sat on linux-next for a few days, Dan
Carpenter saw it and suggested that I use scnprintf instead of
snprintf. I made the change and retested.
Signed-off-by: Amir Mohammad Jahangirzad <a.jahangirzad@gmail.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/orangefs/orangefs-debugfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/orangefs/orangefs-debugfs.c b/fs/orangefs/orangefs-debugfs.c index b57140ebfad0..cd4bfd92ebd6 100644 --- a/fs/orangefs/orangefs-debugfs.c +++ b/fs/orangefs/orangefs-debugfs.c @@ -354,7 +354,7 @@ static ssize_t orangefs_debug_read(struct file *file, goto out; mutex_lock(&orangefs_debug_lock); - sprintf_ret = sprintf(buf, "%s", (char *)file->private_data); + sprintf_ret = scnprintf(buf, ORANGEFS_MAX_DEBUG_STRING_LEN, "%s", (char *)file->private_data); mutex_unlock(&orangefs_debug_lock); read_ret = simple_read_from_buffer(ubuf, count, ppos, buf, sprintf_ret); |