git: 19956b44dcfd - stable/13 - linuxkpi: seq_read: Fix off by one error
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Date: Thu, 02 Feb 2023 11:14:35 UTC
The branch stable/13 has been updated by manu:
URL: https://cgit.FreeBSD.org/src/commit/?id=19956b44dcfd6aadc096cd167e975f02a3804964
commit 19956b44dcfd6aadc096cd167e975f02a3804964
Author: Emmanuel Vadot <manu@FreeBSD.org>
AuthorDate: 2022-12-21 11:42:24 +0000
Commit: Emmanuel Vadot <manu@FreeBSD.org>
CommitDate: 2023-02-02 11:10:37 +0000
linuxkpi: seq_read: Fix off by one error
strscpy needs the buffer length not the string length (so including
the '\0').
Reviewed by: bz
Fixes: f697b9432d9c ("linuxkpi: drm-kmod debugfs support")
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D37771
(cherry picked from commit ccd8c4488afb15c2b866b58d5aa9dd994f300f95)
---
sys/compat/linuxkpi/common/src/linux_seq_file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sys/compat/linuxkpi/common/src/linux_seq_file.c b/sys/compat/linuxkpi/common/src/linux_seq_file.c
index c358e4ae7dc1..d4d8ef059ac4 100644
--- a/sys/compat/linuxkpi/common/src/linux_seq_file.c
+++ b/sys/compat/linuxkpi/common/src/linux_seq_file.c
@@ -67,7 +67,7 @@ seq_read(struct linux_file *f, char *ubuf, size_t size, off_t *ppos)
return (-EINVAL);
size = min(rc - *ppos, size);
- rc = strscpy(ubuf, sbuf_data(sbuf) + *ppos, size);
+ rc = strscpy(ubuf, sbuf_data(sbuf) + *ppos, size + 1);
/* add 1 for null terminator */
if (rc > 0)