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| author | Pengpeng Hou <pengpeng@iscas.ac.cn> | 2026-04-03 16:55:56 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-05-11 16:32:30 +0200 |
| commit | c2c7983c93f5d86962318be7e7298f1bc3feb1a6 (patch) | |
| tree | 9f80a9fef6fdd3a60c30ab96628fdb54ef92a5a1 /kernel/irq | |
| parent | 254f49634ee16a731174d2ae34bc50bd5f45e731 (diff) | |
| download | linux-next-c2c7983c93f5d86962318be7e7298f1bc3feb1a6.tar.gz linux-next-c2c7983c93f5d86962318be7e7298f1bc3feb1a6.zip | |
genirq/proc: Size interrupt directory names for 10-digit interrupt numbers
/proc/irq/<n>/ directory names are built in `char name[10]` buffers
with `sprintf(name, "%u", irq)`.
Ten-digit IRQ numbers already need 11 bytes including the trailing NUL, and
current sparse-IRQ configurations allow interrupt numbers in that range.
Size the temporary name buffer for the current decimal form and switch
to bounded formatting when creating or removing the proc entry.
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260404101001.1-genirq-proc-pengpeng@iscas.ac.cn
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/proc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index b0999a4f1f68..dfa0b0723642 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -10,6 +10,7 @@ #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/interrupt.h> +#include <linux/kernel.h> #include <linux/kernel_stat.h> #include <linux/mutex.h> #include <linux/string.h> @@ -326,7 +327,7 @@ void register_handler_proc(unsigned int irq, struct irqaction *action) #undef MAX_NAMELEN -#define MAX_NAMELEN 10 +#define MAX_NAMELEN 11 void register_irq_proc(unsigned int irq, struct irq_desc *desc) { @@ -348,7 +349,7 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc) return; /* create /proc/irq/1234 */ - sprintf(name, "%u", irq); + snprintf(name, MAX_NAMELEN, "%u", irq); desc->dir = proc_mkdir(name, root_irq_dir); if (!desc->dir) return; @@ -401,7 +402,7 @@ void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) #endif remove_proc_entry("spurious", desc->dir); - sprintf(name, "%u", irq); + snprintf(name, MAX_NAMELEN, "%u", irq); remove_proc_entry(name, root_irq_dir); } |