| Message ID | 20230321052900.16895-1-quic_ppranees@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] wifi: ath11k: fix writing to unintended memory region | expand |
P Praneesh <quic_ppranees@quicinc.com> wrote: > While initializing spectral, the magic value is getting written to the > invalid memory address leading to random boot-up crash. This occurs > due to the incorrect index increment in ath11k_dbring_fill_magic_value > function. Fix it by replacing the existing logic with memset32 to ensure > there is no invalid memory access. > > Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1-01838-QCAHKSWPL_SILICONZ-1 > > Fixes: d3d358efc553 ("ath11k: add spectral/CFR buffer validation support") > Signed-off-by: P Praneesh <quic_ppranees@quicinc.com> > Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Patch applied to ath-next branch of ath.git, thanks. 756a7f90878f wifi: ath11k: fix writing to unintended memory region
diff --git a/drivers/net/wireless/ath/ath11k/dbring.c b/drivers/net/wireless/ath/ath11k/dbring.c index 2107ec05d14f..f072067a75e4 100644 --- a/drivers/net/wireless/ath/ath11k/dbring.c +++ b/drivers/net/wireless/ath/ath11k/dbring.c @@ -26,13 +26,14 @@ int ath11k_dbring_validate_buffer(struct ath11k *ar, void *buffer, u32 size) static void ath11k_dbring_fill_magic_value(struct ath11k *ar, void *buffer, u32 size) { - u32 *temp; - int idx; - size = size >> 2; + /* memset32 function fills buffer payload with the ATH11K_DB_MAGIC_VALUE + * and the variable size is expected to be the number of u32 values + * to be stored, not the number of bytes. + */ + size = size / sizeof(u32); - for (idx = 0, temp = buffer; idx < size; idx++, temp++) - *temp++ = ATH11K_DB_MAGIC_VALUE; + memset32(buffer, ATH11K_DB_MAGIC_VALUE, size); } static int ath11k_dbring_bufs_replenish(struct ath11k *ar,
While initializing spectral, the magic value is getting written to the invalid memory address leading to random boot-up crash. This occurs due to the incorrect index increment in ath11k_dbring_fill_magic_value function. Fix it by replacing the existing logic with memset32 to ensure there is no invalid memory access. Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1-01838-QCAHKSWPL_SILICONZ-1 Fixes: d3d358efc553 ("ath11k: add spectral/CFR buffer validation support") Signed-off-by: P Praneesh <quic_ppranees@quicinc.com> --- v2: - Remove extra space between fixes and signed off tag. --- drivers/net/wireless/ath/ath11k/dbring.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) base-commit: 3df3715e556027e94246b2cb30986563362a65f4