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AKwUvByvkVC6QY5szWs/dMqxZaOL10TcBbmjUiLdZiEspNLgdkoFJf5cPkX6uWD3THBDGpI8XgwclqM=@vger.kernel.org X-Gm-Message-State: AFuF++lMDfNUgXdtnEoZJTGq4u4W8xMwxBPe6DTdzM+h8JDWbYFSiMAQ QFA+XfkJ1LJ+b5Ne//VNPvpu483B2ZIPDYOCJ1ApMc5uwXXISuozDGY14AsHUl6BBCyqddioa3M dpqGXmKBVUs+Ck7cqlWw1zsuVDBd7FdGhWpdjLbCIt7hu4l0QifUXLnQNM9k= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2d04:b0:6c1:f832:9b6a with SMTP id 006d021491bc7-6c24e671d43mr2171106eaf.33.1789243824191; Sat, 12 Sep 2026 13:10:24 -0700 (PDT) Date: Sat, 12 Sep 2026 13:10:24 -0700 In-Reply-To: <6a8b254b.91706f20.16b6e3.02c9.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa5b1b0.f81106d8.2ab401.002f.GAE@google.com> Subject: Re: [syzbot] [wireless?] memory leak in ieee80211_mesh_csa_beacon From: syzbot To: johannes.berg@intel.com, johannes@sipsolutions.net, kartikey406@gmail.com, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, nico.escande@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 5225b8eec4c9 mailmap: update entry for Jens Axboe git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1172e9f9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=736c81750115a056 dashboard link: https://syzkaller.appspot.com/bug?extid=f5752cd6b94fe38be666 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a9b615580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15d870c9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/12d5d066d792/disk-5225b8ee.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f9bb3f95e482/vmlinux-5225b8ee.xz kernel image: https://storage.googleapis.com/syzbot-assets/84ee8de2ba4a/bzImage-5225b8ee.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f5752cd6b94fe38be666@syzkaller.appspotmail.com 2026/09/12 20:09:52 executed programs: 5 BUG: memory leak unreferenced object 0xffff888107ffb800 (size 1024): comm "syz.0.18", pid 5913, jiffies 4294943824 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ d8 23 48 14 81 88 ff ff 00 00 00 00 00 00 00 00 .#H............. backtrace (crc f81fd0): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4696 [inline] slab_alloc_node mm/slub.c:4996 [inline] __kmalloc_cache_noprof+0x38f/0x420 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] ieee80211_mesh_csa_beacon+0x2e/0x100 net/mac80211/mesh.c:1547 ieee80211_set_csa_beacon net/mac80211/cfg.c:4674 [inline] __ieee80211_channel_switch+0xb22/0xed0 net/mac80211/cfg.c:4795 rdev_channel_switch net/wireless/rdev-ops.h:1168 [inline] nl80211_channel_switch+0x39b/0x780 net/wireless/nl80211.c:12388 genl_family_rcv_msg_doit+0x12e/0x1a0 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x302/0x440 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x89/0x1c0 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x38f/0x4e0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x335/0x690 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0x54a/0x580 net/socket.c:2713 ___sys_sendmsg+0x101/0x140 net/socket.c:2767 __sys_sendmsg+0xcd/0x140 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0xe9/0x530 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff888107ff8400 (size 1024): comm "syz.0.19", pid 5915, jiffies 4294943825 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ d8 23 48 14 81 88 ff ff 00 00 00 00 00 00 00 00 .#H............. backtrace (crc f81fd0): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4696 [inline] slab_alloc_node mm/slub.c:4996 [inline] __kmalloc_cache_noprof+0x38f/0x420 mm/slub.c:5559 _kmalloc_noprof include/linux/slab.h:991 [inline] ieee80211_mesh_csa_beacon+0x2e/0x100 net/mac80211/mesh.c:1547 ieee80211_set_csa_beacon net/mac80211/cfg.c:4674 [inline] __ieee80211_channel_switch+0xb22/0xed0 net/mac80211/cfg.c:4795 rdev_channel_switch net/wireless/rdev-ops.h:1168 [inline] nl80211_channel_switch+0x39b/0x780 net/wireless/nl80211.c:12388 genl_family_rcv_msg_doit+0x12e/0x1a0 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x302/0x440 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x89/0x1c0 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x38f/0x4e0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x335/0x690 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:800 [inline] __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0x54a/0x580 net/socket.c:2713 ___sys_sendmsg+0x101/0x140 net/socket.c:2767 __sys_sendmsg+0xcd/0x140 net/socket.c:2799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0xe9/0x530 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.