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| author | Erick Archer <erick.archer@gmx.com> | 2024-02-09 21:16:00 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-13 12:53:15 +0300 |
| commit | 004c7a6bf43edbd4b092fb6ebba8991d56bc3428 (patch) | |
| tree | c081ad22c173a45a396c16908c6ee9be25ec83ae /drivers/irqchip | |
| parent | 83c0708719f77018cd3b98b0011c9526a3e0e2ca (diff) | |
| download | linux-004c7a6bf43edbd4b092fb6ebba8991d56bc3428.tar.xz | |
irqchip/bcm-6345-l1: Prefer struct_size)_ over open coded arithmetic
This is an effort to get rid of all multiplications from allocation
functions in order to prevent integer overflows.
The cpu variable is a pointer to "struct bcm6345_l1_cpu" and this structure
ends in a flexible array:
struct bcm6345_l1_cpu {
[...]
u32 enable_cache[];
};
The preferred way in the kernel is to use the struct_size() helper to do
the arithmetic instead of the argument "size + count * size" in the
kzalloc() function.
This way, the code is more readable and safer.
Signed-off-by: Erick Archer <erick.archer@gmx.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20240209181600.9472-1-erick.archer@gmx.com
Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [1]
Link: https://github.com/KSPP/linux/issues/162 [2]
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-bcm6345-l1.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-bcm6345-l1.c b/drivers/irqchip/irq-bcm6345-l1.c index 9745a119d0e6..eb02d203c963 100644 --- a/drivers/irqchip/irq-bcm6345-l1.c +++ b/drivers/irqchip/irq-bcm6345-l1.c @@ -242,7 +242,7 @@ static int __init bcm6345_l1_init_one(struct device_node *dn, else if (intc->n_words != n_words) return -EINVAL; - cpu = intc->cpus[idx] = kzalloc(sizeof(*cpu) + n_words * sizeof(u32), + cpu = intc->cpus[idx] = kzalloc(struct_size(cpu, enable_cache, n_words), GFP_KERNEL); if (!cpu) return -ENOMEM; |