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-rw-r--r--kernel/printk/printk.c36
1 files changed, 21 insertions, 15 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 7131dd4d0e3a..7476a53bc378 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -378,10 +378,10 @@ static u32 truncate_msg(u16 *text_len, u16 *trunc_msg_len,
}
/* insert record into the buffer, discard old ones, update heads */
-static void log_store(int facility, int level,
- enum log_flags flags, u64 ts_nsec,
- const char *dict, u16 dict_len,
- const char *text, u16 text_len)
+static int log_store(int facility, int level,
+ enum log_flags flags, u64 ts_nsec,
+ const char *dict, u16 dict_len,
+ const char *text, u16 text_len)
{
struct printk_log *msg;
u32 size, pad_len;
@@ -396,7 +396,7 @@ static void log_store(int facility, int level,
&dict_len, &pad_len);
/* survive when the log buffer is too small for trunc_msg */
if (log_make_free_space(size))
- return;
+ return 0;
}
if (log_next_idx + size + sizeof(struct printk_log) > log_buf_len) {
@@ -432,6 +432,8 @@ static void log_store(int facility, int level,
/* insert message */
log_next_idx += msg->len;
log_next_seq++;
+
+ return msg->text_len;
}
#ifdef CONFIG_SECURITY_DMESG_RESTRICT
@@ -1606,10 +1608,10 @@ asmlinkage int vprintk_emit(int facility, int level,
"BUG: recent printk recursion!";
recursion_bug = 0;
- printed_len += strlen(recursion_msg);
+ text_len = strlen(recursion_msg);
/* emit KERN_CRIT message */
- log_store(0, 2, LOG_PREFIX|LOG_NEWLINE, 0,
- NULL, 0, recursion_msg, printed_len);
+ printed_len += log_store(0, 2, LOG_PREFIX|LOG_NEWLINE, 0,
+ NULL, 0, recursion_msg, text_len);
}
/*
@@ -1662,9 +1664,12 @@ asmlinkage int vprintk_emit(int facility, int level,
cont_flush(LOG_NEWLINE);
/* buffer line if possible, otherwise store it right away */
- if (!cont_add(facility, level, text, text_len))
- log_store(facility, level, lflags | LOG_CONT, 0,
- dict, dictlen, text, text_len);
+ if (cont_add(facility, level, text, text_len))
+ printed_len += text_len;
+ else
+ printed_len += log_store(facility, level,
+ lflags | LOG_CONT, 0,
+ dict, dictlen, text, text_len);
} else {
bool stored = false;
@@ -1683,11 +1688,12 @@ asmlinkage int vprintk_emit(int facility, int level,
cont_flush(LOG_NEWLINE);
}
- if (!stored)
- log_store(facility, level, lflags, 0,
- dict, dictlen, text, text_len);
+ if (stored)
+ printed_len += text_len;
+ else
+ printed_len += log_store(facility, level, lflags, 0,
+ dict, dictlen, text, text_len);
}
- printed_len += text_len;
/*
* Try to acquire and then immediately release the console semaphore.