wifi: iwlwifi: fix out of bound copy_from_user

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[ Upstream commit cb2dfacb19 ]

The driver copies the userspace buffer into an internal NUL
byte terminated buffer. While doing so, it was reading beyond
the end of the userspace buffer, overwriting its own NUL
termination in the process.

Fix this by only copying the correct number of bytes.

Fixes: 3f244876ef ("wifi: iwlwifi: make debugfs entries link specific")
Signed-off-by: Anjaneyulu <pagadala.yesu.anjaneyulu@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Reviewed-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20231219215605.e4913deb2ad4.Idcf6a7e909ff4b7801cd49c2f691f84a2f68eff9@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Anjaneyulu 2023-12-19 21:58:55 +02:00 • committed by Greg Kroah-Hartman

parent 3ec42e03b9

commit 8e4bb647d7

1 changed files with 1 additions and 1 deletions

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drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c

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