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authorErick Archer <erick.archer@gmx.com>2024-01-20 18:10:28 +0300
committerOded Gabbay <ogabbay@kernel.org>2024-02-26 10:30:41 +0300
commit9e263c5042d0cb7ed62e499345533c349db30d3f (patch)
treea99fda2508ffdf10844ba19e21c1a41260c80840 /drivers/accel
parent5ae8b6b774732d38840dd7562dc14d1950530023 (diff)
downloadlinux-9e263c5042d0cb7ed62e499345533c349db30d3f.tar.xz
accel/habanalabs: use kcalloc() instead of kzalloc()
As noted in the "Deprecated Interfaces, Language Features, Attributes, and Conventions" documentation [1], size calculations (especially multiplication) should not be performed in memory allocator (or similar) function arguments due to the risk of them overflowing. This could lead to values wrapping around and a smaller allocation being made than the caller was expecting. Using those allocations could lead to linear overflows of heap memory and other misbehaviors. So, use the purpose specific kcalloc() function instead of the argument size * count in the kzalloc() function. Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [1] Link: https://github.com/KSPP/linux/issues/162 Signed-off-by: Erick Archer <erick.archer@gmx.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Diffstat (limited to 'drivers/accel')
-rw-r--r--drivers/accel/habanalabs/common/mmu/mmu_v1.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/accel/habanalabs/common/mmu/mmu_v1.c b/drivers/accel/habanalabs/common/mmu/mmu_v1.c
index 64b5c8fbb166..845d16aaa637 100644
--- a/drivers/accel/habanalabs/common/mmu/mmu_v1.c
+++ b/drivers/accel/habanalabs/common/mmu/mmu_v1.c
@@ -43,7 +43,7 @@ static int dram_default_mapping_init(struct hl_ctx *ctx)
/* add hop1 and hop2 */
total_hops = num_of_hop3 + 2;
- ctx->dram_default_hops = kzalloc(HL_PTE_SIZE * total_hops, GFP_KERNEL);
+ ctx->dram_default_hops = kcalloc(total_hops, HL_PTE_SIZE, GFP_KERNEL);
if (!ctx->dram_default_hops)
return -ENOMEM;