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LU-9859 libcfs: Prevent harmless read underflow
[fs/lustre-release.git]
/
libcfs
/
libcfs
/
tracefile.c
diff --git
a/libcfs/libcfs/tracefile.c
b/libcfs/libcfs/tracefile.c
index
926451f
..
81cb393
100644
(file)
--- a/
libcfs/libcfs/tracefile.c
+++ b/
libcfs/libcfs/tracefile.c
@@
-722,7
+722,7
@@
int cfs_trace_copyin_string(char *knl_buffer, int knl_buffer_nob,
return -EFAULT;
nob = strnlen(knl_buffer, usr_buffer_nob);
-
while (nob--
>= 0) /* strip trailing whitespace */
+
while (--nob
>= 0) /* strip trailing whitespace */
if (!isspace(knl_buffer[nob]))
break;