Messages in this thread Patch in this message | | | From | Vasily Averin <> | Subject | [PATCH 2/7] gcov_seq_next should increase position index | Date | Fri, 24 Jan 2020 10:02:47 +0300 |
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if seq_file .next fuction does not change position index, read after some lseek can generate unexpected output.
https://bugzilla.kernel.org/show_bug.cgi?id=206283 Signed-off-by: Vasily Averin <vvs@virtuozzo.com> --- kernel/gcov/fs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c index e5eb5ea..cc4ee48 100644 --- a/kernel/gcov/fs.c +++ b/kernel/gcov/fs.c @@ -108,9 +108,9 @@ static void *gcov_seq_next(struct seq_file *seq, void *data, loff_t *pos) { struct gcov_iterator *iter = data; + (*pos)++; if (gcov_iter_next(iter)) return NULL; - (*pos)++; return iter; } -- 1.8.3.1
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