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pidfs: add missing BUILD_BUG_ON() assert on struct pidfd_info

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Validate that the size of struct pidfd_info is correctly updated.

Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-4-ca449b7b7aa0@kernel.org
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>
This commit is contained in:
Christian Brauner 2025-10-28 09:45:49 +01:00
parent 4061c43a99
commit d8fc51d8fa
1 changed files with 2 additions and 0 deletions
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fs/pidfs.c
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@ -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)