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wifi: ath11k: fix writing to unintended memory region

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[ Upstream commit 756a7f9087 ]

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: d3d358efc5 ("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>
Link: https://lore.kernel.org/r/20230321052900.16895-1-quic_ppranees@quicinc.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
P Praneesh
2023-03-24 16:57:01 +02:00
committed by Greg Kroah-Hartman
parent f43744872a
commit cfc7ee210f
1 changed files with 6 additions and 6 deletions
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12
drivers/net/wireless/ath/ath11k/dbring.c
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@@ -26,13 +26,13 @@ int ath11k_dbring_validate_buffer(struct ath11k *ar, void *buffer, u32 size)
static void ath11k_dbring_fill_magic_value(struct ath11k *ar, static void ath11k_dbring_fill_magic_value(struct ath11k *ar,
void *buffer, u32 size) void *buffer, u32 size)
{ {
u32 *temp; /* memset32 function fills buffer payload with the ATH11K_DB_MAGIC_VALUE
int idx; * 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);
size = size >> 2; memset32(buffer, ATH11K_DB_MAGIC_VALUE, size);
for (idx = 0, temp = buffer; idx < size; idx++, temp++)
*temp++ = ATH11K_DB_MAGIC_VALUE;
} }
static int ath11k_dbring_bufs_replenish(struct ath11k *ar, static int ath11k_dbring_bufs_replenish(struct ath11k *ar,