lkml.org 
[lkml]   [2024]   [Apr]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
SubjectRe: [syzbot] [bpf?] KMSAN: uninit-value in strnchr
Date
please test uini in strnchr

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 04b8076df253

diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 449b9a5d3fe3..07490eba24fe 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -826,7 +826,7 @@ int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
u64 cur_arg;
char fmt_ptype, cur_ip[16], ip_spec[] = "%pXX";

- fmt_end = strnchr(fmt, fmt_size, 0);
+ fmt_end = strnchrnul(fmt, fmt_size, 0);
if (!fmt_end)
return -EINVAL;
fmt_size = fmt_end - fmt;

\
 
 \ /
  Last update: 2024-04-09 13:42    [W:0.123 / U:1.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site