[PATCH riscv64] kobject: fix WARNING in input_register_device

Edward Adam Davis
2024-02-08T10:47:10Z

The input_add_uevent_modalias_var()->input_print_modalias() will add 1684 bytes
of data to env, which will result in insufficient memory allocated to the buf
members of env.

Reported-and-tested-by: syzbot+8e41bb0c055b209ebbf4@syzkaller.appspotmail.com
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
---
include/linux/kobject.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index c30affcc43b4..74b37b6459cd 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -30,7 +30,7 @@

#define UEVENT_HELPER_PATH_LEN 256
#define UEVENT_NUM_ENVP 64 /* number of env pointers */
-#define UEVENT_BUFFER_SIZE 2048 /* buffer for the variables */
+#define UEVENT_BUFFER_SIZE 2560 /* buffer for the variables */

#ifdef CONFIG_UEVENT_HELPER
/* path to the userspace helper executed on an event */
--
2.43.0