From: David Thompson davthompson@nvidia.com
stable inclusion from stable-v6.6.64 commit ac6ebb9edcdb7077e841862c402697c4c48a7c0a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBDHGU CVE: CVE-2024-53161
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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[ Upstream commit 1fe774a93b46bb029b8f6fa9d1f25affa53f06c6 ]
The 64-bit argument for the "get DIMM info" SMC call consists of mem_ctrl_idx left-shifted 16 bits and OR-ed with DIMM index. With mem_ctrl_idx defined as 32-bits wide the left-shift operation truncates the upper 16 bits of information during the calculation of the SMC argument.
The mem_ctrl_idx stack variable must be defined as 64-bits wide to prevent any potential integer overflow, i.e. loss of data from upper 16 bits.
Fixes: 82413e562ea6 ("EDAC, mellanox: Add ECC support for BlueField DDR4") Signed-off-by: David Thompson davthompson@nvidia.com Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Reviewed-by: Shravan Kumar Ramani shravankr@nvidia.com Link: https://lore.kernel.org/r/20240930151056.10158-1-davthompson@nvidia.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Liu Kai liukai284@huawei.com --- drivers/edac/bluefield_edac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/edac/bluefield_edac.c b/drivers/edac/bluefield_edac.c index e4736eb37bfb..0ef048982768 100644 --- a/drivers/edac/bluefield_edac.c +++ b/drivers/edac/bluefield_edac.c @@ -180,7 +180,7 @@ static void bluefield_edac_check(struct mem_ctl_info *mci) static void bluefield_edac_init_dimms(struct mem_ctl_info *mci) { struct bluefield_edac_priv *priv = mci->pvt_info; - int mem_ctrl_idx = mci->mc_idx; + u64 mem_ctrl_idx = mci->mc_idx; struct dimm_info *dimm; u64 smc_info, smc_arg; int is_empty = 1, i;