diff options
| author | Erick Archer <erick.archer@gmx.com> | 2024-02-09 19:31:28 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-13 10:53:15 +0100 |
| commit | e955a71f83598a347eb45af5576e7eb6cb5bf285 (patch) | |
| tree | f3735ed1de9f291b5aec50c9034ed6ee3ef1959b /drivers/irqchip | |
| parent | 004c7a6bf43edbd4b092fb6ebba8991d56bc3428 (diff) | |
irqchip/irq-bcm7038-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 bcm7038_l1_cpu" and this structure
ends in a flexible array:
struct bcm7038_l1_cpu {
void __iomem *map_base;
u32 mask_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 more safer.
Signed-off-by: Erick Archer <erick.archer@gmx.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20240209183128.10273-1-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-bcm7038-l1.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-bcm7038-l1.c b/drivers/irqchip/irq-bcm7038-l1.c index 24ca1d656adc..36e71af054e9 100644 --- a/drivers/irqchip/irq-bcm7038-l1.c +++ b/drivers/irqchip/irq-bcm7038-l1.c @@ -249,7 +249,7 @@ static int __init bcm7038_l1_init_one(struct device_node *dn, return -EINVAL; } - cpu = intc->cpus[idx] = kzalloc(sizeof(*cpu) + n_words * sizeof(u32), + cpu = intc->cpus[idx] = kzalloc(struct_size(cpu, mask_cache, n_words), GFP_KERNEL); if (!cpu) return -ENOMEM; |