Re: [PATCH] ath: dfs_pattern_detector: Fix possible null-pointer dereference in channel_detector_create()

Tuo Li [off-list ref] wrote:

kzalloc() is used to allocate memory for cd->detectors, and if it fails,
channel_detector_exit() behind the label fail will be called:
  channel_detector_exit(dpd, cd);

In channel_detector_exit(), cd->detectors is dereferenced through:
  struct pri_detector *de = cd->detectors[i];

To fix this possible null-pointer dereference, check cd->detectors before
the for loop to dereference cd->detectors.

Reported-by: TOTE Robot <redacted>
Signed-off-by: Tuo Li <redacted>
Signed-off-by: Kalle Valo <redacted>

Patch applied to ath-next branch of ath.git, thanks.

4b6012a7830b ath: dfs_pattern_detector: Fix possible null-pointer dereference in channel_detector_create()

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210805153854.154066-1-islituo@gmail.com/

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