Failing to close the stderr pipe in verify_signed_buffer() causes
git to run out of file descriptors if there are many calls to
verify_signed_buffer(). An easy way to trigger this is to run
git log --show-signature --merges | grep "key"
on the linux kernel git repo. Eventually it will fail with
error: cannot create pipe for gpg: Too many open files
error: could not run gpg.
Close the stderr pipe so that this can't happen.
Suggested-by: Jeff King <peff@xxxxxxxx>
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---
gpg-interface.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gpg-interface.c b/gpg-interface.c
index 0863c61..5f142f6 100644
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -130,8 +130,10 @@ int verify_signed_buffer(const char *payload, size_t payload_size,
write_in_full(gpg.in, payload, payload_size);
close(gpg.in);
- if (gpg_output)
+ if (gpg_output) {
strbuf_read(gpg_output, gpg.err, 0);
+ close(gpg.err);
+ }
ret = finish_command(&gpg);
unlink_or_warn(path);
--
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