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acrn-kernel/kernel/debug/kdb
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Christophe JAILLET 7809296dc1 kdb: Fix a potential buffer overflow in kdb_local() 
[ Upstream commit 4f41d30cd6dc865c3cbc1a852372321eba6d4e4c ]

When appending "[defcmd]" to 'kdb_prompt_str', the size of the string
already in the buffer should be taken into account.

An option could be to switch from strncat() to strlcat() which does the
correct test to avoid such an overflow.

However, this actually looks as dead code, because 'defcmd_in_progress'
can't be true here.
See a more detailed explanation at [1].

[1]: https://lore.kernel.org/all/CAD=FV=WSh7wKN7Yp-3wWiDgX4E3isQ8uh0LCzTmd1v9Cg9j+nQ@mail.gmail.com/

Fixes: 5d5314d679 ("kdb: core for kgdb back end (1 of 2)")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2024-01-25 15:27:51 -08:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Makefile
…
kdb_bp.c kdb: Rename members of struct kdbtab_t 2021-07-27 17:05:06 +01:00
kdb_bt.c kdb: Adopt scheduler's task classification 2021-11-03 17:21:37 +00:00
kdb_cmds
…
kdb_debugger.c kdb: Get rid of custom debug heap allocator 2021-07-27 14:46:11 +01:00
kdb_io.c module: Move kdb module related code out of main kdb code 2022-04-05 08:43:04 -07:00
kdb_keyboard.c module: Move kdb module related code out of main kdb code 2022-04-05 08:43:04 -07:00
kdb_main.c kdb: Fix a potential buffer overflow in kdb_local() 2024-01-25 15:27:51 -08:00
kdb_private.h module: Move kdb module related code out of main kdb code 2022-04-05 08:43:04 -07:00
kdb_support.c module: Move kdb module related code out of main kdb code 2022-04-05 08:43:04 -07:00