git: 8ead19207e56 - main - LinuxKPI: 802.11: reset chanctx when recycling

The branch main has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=8ead19207e56790bd4c64dba4ddbf2e0eb6922f7

commit 8ead19207e56790bd4c64dba4ddbf2e0eb6922f7
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2026-05-23 21:06:32 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2026-05-23 23:54:30 +0000

    LinuxKPI: 802.11: reset chanctx when recycling
    
    When we no longer need a channel context and put it back on the
    reserved list, zero it for all but the vif so that we get the same
    state as if it was freshly allocated.
    
    Sponsored by:   The FreeBSD Foundation
    Fixes:          e62c92c0a5cf, 88cb1e17f471
    MFC after:      3 days
---
 sys/compat/linuxkpi/common/src/linux_80211.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sys/compat/linuxkpi/common/src/linux_80211.c b/sys/compat/linuxkpi/common/src/linux_80211.c
index b9528295ad8e..efd1d9bae3cc 100644
--- a/sys/compat/linuxkpi/common/src/linux_80211.c
+++ b/sys/compat/linuxkpi/common/src/linux_80211.c
@@ -2426,6 +2426,8 @@ lkpi_set_chanctx_conf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		rcu_assign_pointer(vif->bss_conf.chanctx_conf, NULL);
 		lchanctx = CHANCTX_CONF_TO_LCHANCTX(chanctx_conf);
 		list_del(&lchanctx->entry);
+		memset(lchanctx, 0, sizeof(*lchanctx));
+		lchanctx->lvif = VIF_TO_LVIF(vif);
 		list_add_rcu(&lchanctx->entry, &lhw->lchanctx_list_reserved);
 	}
 
@@ -2460,6 +2462,8 @@ lkpi_remove_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 	lchanctx = CHANCTX_CONF_TO_LCHANCTX(chanctx_conf);
 	list_del(&lchanctx->entry);
 	lhw = HW_TO_LHW(hw);
+	memset(lchanctx, 0, sizeof(*lchanctx));
+	lchanctx->lvif = VIF_TO_LVIF(vif);
 	list_add_rcu(&lchanctx->entry, &lhw->lchanctx_list_reserved);
 }
 
@@ -6806,6 +6810,7 @@ linuxkpi_ieee80211_iffree(struct ieee80211_hw *hw)
 				lkpi_80211_mo_remove_chanctx(hw, chanctx_conf);
 			}
 			list_del(&lchanctx->entry);
+			/* No need to reset the lchanctx here as we will free it below. */
 			list_add_rcu(&lchanctx->entry, &lhw->lchanctx_list_reserved);
 		}
 	}