Eric Lee / smarc-ti-linux-kernel

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Commit 47e4df94d129cbca84de252ff63c4ded08a513e7

Authored by Michal Kazior
Committed by Linus Torvalds
1 parent 433ab34d26
Exists in ti-lsk-linux-4.1.y and in 10 other branches dlt-processor-sdk-linux-03.00.00.04, processor-sdk-linux-02.00.01, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04

mac80211: fix channel switch for chanctx-based drivers 

The new_ctx pointer is set only for non-chanctx drivers.  This yielded a
crash for chanctx-based drivers during channel switch finalization:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
  IP: ieee80211_vif_use_reserved_switch+0x71c/0xb00 [mac80211]

Use an adequate chanctx pointer to fix this.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff

... ... @@ -1444,7 +1444,7 @@
1444 1444  
1445 1445 list_del(&sdata->reserved_chanctx_list);
1446 1446 list_move(&sdata->assigned_chanctx_list,
1447   - &new_ctx->assigned_vifs);
  1447 + &ctx->assigned_vifs);
1448 1448 sdata->reserved_chanctx = NULL;
1449 1449  
1450 1450 ieee80211_vif_chanctx_reservation_complete(sdata);