CVE-2024-49937

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: cfg80211: Set correct chandef when starting CAC<br /> <br /> When starting CAC in a mode other than AP mode, it return a<br /> "WARNING: CPU: 0 PID: 63 at cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]"<br /> caused by the chandef.chan being null at the end of CAC.<br /> <br /> Solution: Ensure the channel definition is set for the different modes<br /> when starting CAC to avoid getting a NULL &amp;#39;chan&amp;#39; at the end of CAC.<br /> <br /> Call Trace:<br /> ? show_regs.part.0+0x14/0x16<br /> ? __warn+0x67/0xc0<br /> ? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]<br /> ? report_bug+0xa7/0x130<br /> ? exc_overflow+0x30/0x30<br /> ? handle_bug+0x27/0x50<br /> ? exc_invalid_op+0x18/0x60<br /> ? handle_exception+0xf6/0xf6<br /> ? exc_overflow+0x30/0x30<br /> ? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]<br /> ? exc_overflow+0x30/0x30<br /> ? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]<br /> ? regulatory_propagate_dfs_state.cold+0x1b/0x4c [cfg80211]<br /> ? cfg80211_propagate_cac_done_wk+0x1a/0x30 [cfg80211]<br /> ? process_one_work+0x165/0x280<br /> ? worker_thread+0x120/0x3f0<br /> ? kthread+0xc2/0xf0<br /> ? process_one_work+0x280/0x280<br /> ? kthread_complete_and_exit+0x20/0x20<br /> ? ret_from_fork+0x19/0x24<br /> <br /> [shorten subject, remove OCB, reorder cases to match previous list]