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intrepid-socketcan-kernel-module
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Add compile-time size checks to neomessage sizes 

All versions of the struct need to be the same size. Ensure they are.

Signed-off-by: Christian Gabriel <ch_gabriel@web.de>
pull/22/head
Christian Gabriel 2024-03-09 11:30:57 +01:00 committed by Kyle Schwarz
parent c888a206d9
commit 760b9d8e34
1 changed files with 11 additions and 0 deletions
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11
intrepid.c
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@ -1118,6 +1118,17 @@ static __init int intrepid_init(void)
int ret;
pr_info("intrepid: %s %s\n", KO_DESC, KO_VERSION);
BUILD_BUG_ON_MSG(sizeof(neomessage_t) != (56 + sizeof(void*) + sizeof(size_t)),
"neomessage_t size is incorrect!");
BUILD_BUG_ON_MSG(sizeof(neomessage_frame_t) != sizeof(neomessage_t),
"All types of neomessage_t must be the same size! (Base frame is not)");
BUILD_BUG_ON_MSG(sizeof(neomessage_can_t) != sizeof(neomessage_t),
"All types of neomessage_t must be the same size! (CAN is not)");
BUILD_BUG_ON_MSG(sizeof(neomessage_can_error_t) != sizeof(neomessage_t),
"All types of neomessage_t must be the same size! (CAN error is not)");
BUILD_BUG_ON_MSG(sizeof(neomessage_eth_t) != sizeof(neomessage_t),
"All types of neomessage_t must be the same size! (Ethernet is not)");
is_open = 0;
/* this is the shared memory used to transfer between us and the user daemon */