From 1a42c69237a57805b09b50e90878c33100ea2397 Mon Sep 17 00:00:00 2001 From: Murilo Opsfelder Araujo Date: Tue, 12 Jul 2022 18:08:10 -0300 Subject: [PATCH] target/ppc/kvm: Skip current and parent directories in kvmppc_find_cpu_dt Some systems have /proc/device-tree/cpus/../clock-frequency. However, this is not the expected path for a CPU device tree directory. Signed-off-by: Murilo Opsfelder Araujo Signed-off-by: Fabiano Rosas Reviewed-by: David Gibson Reviewed-by: Daniel Henrique Barboza Message-Id: <20220712210810.35514-1-muriloo@linux.ibm.com> Signed-off-by: Daniel Henrique Barboza --- target/ppc/kvm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index 6eed466f80..466d0d2f4c 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -1877,6 +1877,12 @@ static int kvmppc_find_cpu_dt(char *buf, int buf_len) buf[0] = '\0'; while ((dirp = readdir(dp)) != NULL) { FILE *f; + + /* Don't accidentally read from the current and parent directories */ + if (strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0) { + continue; + } + snprintf(buf, buf_len, "%s%s/clock-frequency", PROC_DEVTREE_CPU, dirp->d_name); f = fopen(buf, "r"); -- 2.11.0