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| author | Yun Zhou <yun.zhou@windriver.com> | 2021-06-26 11:21:55 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-20 16:21:09 +0200 |
| commit | f2b9f758e1dfb593872fd0fcd7644875bcb8757a (patch) | |
| tree | 757a224565202c8cc3db387e21df097b302c440c /kernel/Kconfig.freezer | |
| parent | ac4e43703809d2d6aa4d74b71de7c8024c68470b (diff) | |
| download | linux-stable-f2b9f758e1dfb593872fd0fcd7644875bcb8757a.tar.gz linux-stable-f2b9f758e1dfb593872fd0fcd7644875bcb8757a.tar.bz2 linux-stable-f2b9f758e1dfb593872fd0fcd7644875bcb8757a.zip | |
seq_buf: Fix overflow in seq_buf_putmem_hex()
commit d3b16034a24a112bb83aeb669ac5b9b01f744bb7 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/Kconfig.freezer')
0 files changed, 0 insertions, 0 deletions