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| author | Yun Zhou <yun.zhou@windriver.com> | 2021-06-26 06:21:55 +0300 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-06-26 16:18:48 +0300 |
| commit | d3b16034a24a112bb83aeb669ac5b9b01f744bb7 (patch) | |
| tree | 8c3c57156010b8455fe76226777e3ed77b1a130b /lib/textsearch.c | |
| parent | c8895e271f7994a3ecb13b8a280e39aa53879545 (diff) | |
| download | linux-d3b16034a24a112bb83aeb669ac5b9b01f744bb7.tar.xz | |
seq_buf: Fix overflow in seq_buf_putmem_hex()
There's two variables being increased in that loop (i and j), and i
follows the raw data, and j follows what is being written into the buffer.
We should compare 'i' to MAX_MEMHEX_BYTES or compare 'j' to HEX_CHARS.
Otherwise, if 'j' goes bigger than HEX_CHARS, it will overflow the
destination buffer.
Link: https://lore.kernel.org/lkml/20210625122453.5e2fe304@oasis.local.home/
Link: https://lkml.kernel.org/r/20210626032156.47889-1-yun.zhou@windriver.com
Cc: stable@vger.kernel.org
Fixes: 5e3ca0ec76fce ("ftrace: introduce the "hex" output method")
Signed-off-by: Yun Zhou <yun.zhou@windriver.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'lib/textsearch.c')
0 files changed, 0 insertions, 0 deletions