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| author | Kalle Valo <quic_kvalo@quicinc.com> | 2022-10-10 19:06:38 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@kernel.org> | 2022-10-11 11:46:31 +0300 |
| commit | abf93f369419249ca482a8911039fe1c75a94227 (patch) | |
| tree | 06561cbd7908add09948839ce6c3acd0682ebeb7 /net/sched/sch_taprio.c | |
| parent | 95b0f66649bb04c6c9c15e461ecf9522efe9555c (diff) | |
wifi: ath11k: mac: fix reading 16 bytes from a region of size 0 warning
Linaro reported stringop-overread warnings in ath11k (this is one of many):
drivers/net/wireless/ath/ath11k/mac.c:2238:29: error: 'ath11k_peer_assoc_h_he_limit' reading 16 bytes from a region of size 0 [-Werror=stringop-overread]
My further investigation showed that these warnings happen on GCC 11.3 but not
with GCC 12.2, and with only the kernel config Linaro provided:
https://builds.tuxbuild.com/2F4W7nZHNx3T88RB0gaCZ9hBX6c/config
I saw the same warnings both with arm64 and x86_64 builds and KASAN seems to be
the reason triggering these warnings with GCC 11. Nobody else has reported
this so this seems to be quite rare corner case. I don't know what specific
commit started emitting this warning so I can't provide a Fixes tag. The
function hasn't been touched for a year.
I decided to workaround this by converting the pointer to a new array in stack,
and then copying the data to the new array. It's only 16 bytes anyway and this
is executed during association, so not in a hotpath.
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.9
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Link: https://lore.kernel.org/all/CA+G9fYsZ_qypa=jHY_dJ=tqX4515+qrV9n2SWXVDHve826nF7Q@mail.gmail.com/
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221010160638.20152-1-kvalo@kernel.org
Diffstat (limited to 'net/sched/sch_taprio.c')
0 files changed, 0 insertions, 0 deletions