From 6b26285f44c9306747c609cb304f787f1933594c Mon Sep 17 00:00:00 2001 From: Roberto Sassu Date: Tue, 8 Jun 2021 14:31:22 +0200 Subject: ima/evm: Fix type mismatch The endianness of a variable written to the measurement list cannot be determined at compile time, as it depends on the value of the ima_canonical_fmt global variable (set through a kernel option with the same name if the machine is big endian). If ima_canonical_fmt is false, the endianness of a variable is the same as the machine; if ima_canonical_fmt is true, the endianness is little endian. The warning arises due to this type of instruction: var = cpu_to_leXX(var) which tries to assign a value in little endian to a variable with native endianness (little or big endian). Given that the variables set with this instruction are not used in any operation but just written to a buffer, it is safe to force the type of the value being set to be the same of the type of the variable with: var = (__force )cpu_to_leXX(var) Reported-by: kernel test robot Signed-off-by: Roberto Sassu Signed-off-by: Mimi Zohar --- security/integrity/evm/evm_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'security/integrity/evm') diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index 2c226e634ae9..977208aecd06 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -360,7 +360,7 @@ int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer, size = sizeof(u32); if (buffer) { if (canonical_fmt) - rc = cpu_to_le32(rc); + rc = (__force int)cpu_to_le32(rc); *(u32 *)(buffer + total_size) = rc; } -- cgit v1.2.3