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Merge pull request #272 from NOVBobLee/pr_patch
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Fix a wierd behavior of a function
This commit is contained in:
Jim Huang 2024-10-07 12:11:10 +08:00 committed by GitHub
commit 2eadbb1ecf
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1 changed files with 3 additions and 3 deletions
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6
examples/procfs2.c
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@ -48,13 +48,13 @@ static ssize_t procfile_write(struct file *file, const char __user *buff,
size_t len, loff_t *off) size_t len, loff_t *off)
{ {
procfs_buffer_size = len; procfs_buffer_size = len;
if (procfs_buffer_size > PROCFS_MAX_SIZE) if (procfs_buffer_size >= PROCFS_MAX_SIZE)
procfs_buffer_size = PROCFS_MAX_SIZE; procfs_buffer_size = PROCFS_MAX_SIZE - 1;
if (copy_from_user(procfs_buffer, buff, procfs_buffer_size)) if (copy_from_user(procfs_buffer, buff, procfs_buffer_size))
return -EFAULT; return -EFAULT;
procfs_buffer[procfs_buffer_size & (PROCFS_MAX_SIZE - 1)] = '\0'; procfs_buffer[procfs_buffer_size] = '\0';
*off += procfs_buffer_size; *off += procfs_buffer_size;
pr_info("procfile write %s\n", procfs_buffer); pr_info("procfile write %s\n", procfs_buffer);