Similar to our handling of fds that have been subject to F_SETOWN,
detect when an fd has had its f_owner->signum changed from the
default.
Signed-off-by: Nathan Lynch <ntl@xxxxxxxxx>
---
fs/checkpoint.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/fs/checkpoint.c b/fs/checkpoint.c
index fd539c5..bf4d2d4 100644
--- a/fs/checkpoint.c
+++ b/fs/checkpoint.c
@@ -265,6 +265,7 @@ static int checkpoint_file_desc(struct ckpt_ctx *ctx,
struct file *file = NULL;
struct fdtable *fdt;
int objref, ret;
+ int signum;
int coe = 0; /* avoid gcc warning */
pid_t pid;
@@ -311,6 +312,13 @@ static int checkpoint_file_desc(struct ckpt_ctx *ctx,
goto out;
}
+ signum = ACCESS_ONCE(file->f_owner.signum);
+ if (signum != 0) {
+ ret = -EBUSY;
+ ckpt_err(ctx, ret, "%(T)fd %d has a signal set (%d)\n", fd, signum);
+ goto out;
+ }
+
/*
* if seen first time, this will add 'file' to the objhash, keep
* a reference to it, dump its state while at it.
--
1.7.4.4
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