6.18-stable review patch. If anyone has any objections, please let me know.
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From: Christian Brauner brauner@kernel.org
[ Upstream commit d8fc51d8fa3b9894713e7eebcf574bee488fa3e1 ]
Validate that the size of struct pidfd_info is correctly updated.
Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-4-ca449b7b7aa0@ker... Fixes: 1d8db6fd698d ("pidfs, coredump: add PIDFD_INFO_COREDUMP") Reviewed-by: Alexander Mikhalitsyn aleksandr.mikhalitsyn@canonical.com Reviewed-by: Oleg Nesterov oleg@redhat.com Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/pidfs.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/pidfs.c b/fs/pidfs.c index 0ef5b47d796a2..f4d7dac1b4494 100644 --- a/fs/pidfs.c +++ b/fs/pidfs.c @@ -306,6 +306,8 @@ static long pidfd_info(struct file *file, unsigned int cmd, unsigned long arg) const struct cred *c; __u64 mask;
+ BUILD_BUG_ON(sizeof(struct pidfd_info) != PIDFD_INFO_SIZE_VER1); + if (!uinfo) return -EINVAL; if (usize < PIDFD_INFO_SIZE_VER0)