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packet: Correct type of PACKET_MAX_LEN

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PACKET_MAX_LEN is usually involved in calculations on size_t values - the
type of the iov_len field in struct iovec.  However, being defined bare as
UINT16_MAX, the compiled is likely to assign it a shorter type.  This can
lead to unexpected promotions (or lack thereof).  Add a cast to force the
type to be what we expect.

Fixes: c43972ad6 ("packet: Give explicit name to maximum packet size")
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2025-03-17 20:24:18 +11:00 • committed by Stefano Brivio
parent 9866d146e6
commit c48331ca51
1 changed files with 1 additions and 1 deletions

2
packet.h
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@ -9,7 +9,7 @@
#include <stdbool.h>
/* Maximum size of a single packet stored in pool, including headers */
#define PACKET_MAX_LEN UINT16_MAX
#define PACKET_MAX_LEN ((size_t)UINT16_MAX)
/**
* struct pool - Generic pool of packets stored in a buffer