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-rw-r--r--sysfs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sysfs.c b/sysfs.c
index 6c17c5e4..d923f7fb 100644
--- a/sysfs.c
+++ b/sysfs.c
@@ -379,7 +379,7 @@ unsigned long long get_component_size(int fd)
return 0;
n = read(fd, fname, sizeof(fname));
close(fd);
- if (n == sizeof(fname))
+ if (n < 0 || n == sizeof(fname))
return 0;
fname[n] = 0;
return strtoull(fname, NULL, 10) * 2;