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AJvYcCX0xtabdJy/7NXVrwQit1UTFyGmyMjQweMSo57M8StcNygVLHhaqaRCL0dC15o5AKV3AUMukUjlKYubTUw=@vger.kernel.org X-Gm-Message-State: AOJu0Yww2DWUWKzXpfmbKWuZfD36oOZu7xpFukv9ps0c/6p9ZzMhNDy8 CrJ6os7dPi5S7zMRYEskpj2TSj0PqsbgUI98J9gKtsLcg7u8PKeXUIcKrkR8bmiDTWnWuglutqX fECXXdhYFHFETgtzrh+rpEPmPn2oyaVhOEf5dohnn71Ldq0NKUXeIcxs= X-Google-Smtp-Source: AGHT+IHz1c7PFIaZ7u8vhlxD93T55qlqIhoUW5Taso9Fyt01Q8A9oyV2sdzriuvD0xjOR09ahGuGLRLUlHEbMRIbi50md3azvRfU Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:148e:b0:864:4a66:f4df with SMTP id ca18e2360f4ac-8674728353bmr432542139f.6.1746618363360; Wed, 07 May 2025 04:46:03 -0700 (PDT) Date: Wed, 07 May 2025 04:46:03 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <681b47fb.050a0220.37980e.0403.GAE@google.com> Subject: Re: [syzbot] [wireless?] UBSAN: array-index-out-of-bounds in ieee80211_request_ibss_scan From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: UBSAN: array-index-out-of-bounds in ieee80211_request_ibss_scan wlan1: Trigger new scan to find an IBSS to join ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in net/mac80211/scan.c:1208:5 index 0 is out of range for type 'struct ieee80211_channel *[] __counted_by(n_channels)' (aka 'struct ieee80211_channel *[]') CPU: 0 UID: 0 PID: 3017 Comm: kworker/u4:10 Not tainted 6.15.0-rc5-syzkaller-00032-g0d8d44db295c-dirty #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: events_unbound cfg80211_wiphy_work Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 ubsan_epilogue+0xa/0x40 lib/ubsan.c:231 __ubsan_handle_out_of_bounds+0xe9/0xf0 lib/ubsan.c:453 ieee80211_request_ibss_scan+0x600/0x8b0 net/mac80211/scan.c:1208 ieee80211_sta_find_ibss net/mac80211/ibss.c:-1 [inline] ieee80211_ibss_work+0xde7/0x1060 net/mac80211/ibss.c:1670 cfg80211_wiphy_work+0x2dc/0x460 net/wireless/core.c:435 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---[ end trace ]--- Kernel panic - not syncing: UBSAN: panic_on_warn set ... CPU: 0 UID: 0 PID: 3017 Comm: kworker/u4:10 Not tainted 6.15.0-rc5-syzkaller-00032-g0d8d44db295c-dirty #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: events_unbound cfg80211_wiphy_work Call Trace: dump_stack_lvl+0x99/0x250 lib/dump_stack.c:120 panic+0x2db/0x790 kernel/panic.c:354 check_panic_on_warn+0x89/0xb0 kernel/panic.c:243 __ubsan_handle_out_of_bounds+0xe9/0xf0 lib/ubsan.c:453 ieee80211_request_ibss_scan+0x600/0x8b0 net/mac80211/scan.c:1208 ieee80211_sta_find_ibss net/mac80211/ibss.c:-1 [inline] ieee80211_ibss_work+0xde7/0x1060 net/mac80211/ibss.c:1670 cfg80211_wiphy_work+0x2dc/0x460 net/wireless/core.c:435 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Kernel Offset: disabled Rebooting in 86400 seconds.. Tested on: commit: 0d8d44db Merge tag 'for-6.15-rc5-tag' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=153684d4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=923d9ad0afad47e5 dashboard link: https://syzkaller.appspot.com/bug?extid=4bcdddd48bb6f0be0da1 compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 patch: https://syzkaller.appspot.com/x/patch.diff?x=122571cc580000