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authorAkshay Gupta <akshay.gupta@amd.com>2025-07-16 14:07:27 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2025-07-16 16:02:45 +0300
commite108b0a5d339aca9661cd93eb4258b2c661e11e8 (patch)
treeec642138a4cbbbe797080d63a847485602a818fc /scripts/gdb/linux/interrupts.py
parent1b98304c09a0192598d0767f1eb8c83d7e793091 (diff)
downloadlinux-e108b0a5d339aca9661cd93eb4258b2c661e11e8.tar.xz
misc: amd-sbi: Address potential integer overflow issue reported in smatch
Smatch warnings are reported for below commit, Commit bb13a84ed6b7 ("misc: amd-sbi: Add support for CPUID protocol") from Apr 28, 2025 (linux-next), leads to the following Smatch static checker warning: drivers/misc/amd-sbi/rmi-core.c:132 rmi_cpuid_read() warn: bitwise OR is zero '0xffffffff00000000 & 0xffff' drivers/misc/amd-sbi/rmi-core.c:132 rmi_cpuid_read() warn: potential integer overflow from user 'msg->cpu_in_out << 32' drivers/misc/amd-sbi/rmi-core.c:213 rmi_mca_msr_read() warn: bitwise OR is zero '0xffffffff00000000 & 0xffff' drivers/misc/amd-sbi/rmi-core.c:213 rmi_mca_msr_read() warn: potential integer overflow from user 'msg->mcamsr_in_out << 32' CPUID & MCAMSR thread data from input is available at byte 4 & 5, this patch fixes to copy the user data correctly in the argument. Previously, CPUID and MCAMSR data is return only for thread 0. Fixes: bb13a84ed6b7 ("misc: amd-sbi: Add support for CPUID protocol") Fixes: 69b1ba83d21c ("misc: amd-sbi: Add support for read MCA register protocol") Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/all/aDVyO8ByVsceybk9@stanley.mountain/ Reviewed-by: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@amd.com> Signed-off-by: Akshay Gupta <akshay.gupta@amd.com> Link: https://lore.kernel.org/r/20250716110729.2193725-1-akshay.gupta@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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