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Message-ID: <0000000000006c06870614886611@google.com> Date: Mon, 25 Mar 2024 21:05:26 -0700 From: syzbot <syzbot+75af45a00cf13243ba39@...kaller.appspotmail.com> To: davem@...emloft.net, edumazet@...gle.com, johannes@...solutions.net, kuba@...nel.org, linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com Subject: [syzbot] [wireless?] KMSAN: uninit-value in ieee80211_rx_handlers (2) Hello, syzbot found the following issue on: HEAD commit: 4f55aa85a874 Merge tag 'fbdev-for-6.9-rc1' of git://git.ke.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1536e231180000 kernel config: https://syzkaller.appspot.com/x/.config?x=e6bd769cb793b98a dashboard link: https://syzkaller.appspot.com/bug?extid=75af45a00cf13243ba39 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=156ebbb9180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12605691180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7189321e94a5/disk-4f55aa85.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2cca9c27d4fe/vmlinux-4f55aa85.xz kernel image: https://storage.googleapis.com/syzbot-assets/b707938817e2/bzImage-4f55aa85.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+75af45a00cf13243ba39@...kaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in ieee80211_rx_h_action net/mac80211/rx.c:3783 [inline] BUG: KMSAN: uninit-value in ieee80211_rx_handlers+0xbeb7/0x10ec0 net/mac80211/rx.c:4188 ieee80211_rx_h_action net/mac80211/rx.c:3783 [inline] ieee80211_rx_handlers+0xbeb7/0x10ec0 net/mac80211/rx.c:4188 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4223 [inline] ieee80211_prepare_and_rx_handle+0x5424/0x99f0 net/mac80211/rx.c:5071 ieee80211_rx_for_interface+0x88d/0x990 net/mac80211/rx.c:5156 __ieee80211_rx_handle_packet net/mac80211/rx.c:5312 [inline] ieee80211_rx_list+0x5498/0x6690 net/mac80211/rx.c:5447 ieee80211_rx_napi+0x84/0x3f0 net/mac80211/rx.c:5470 ieee80211_rx include/net/mac80211.h:5083 [inline] ieee80211_tasklet_handler+0x19f/0x330 net/mac80211/main.c:438 tasklet_action_common+0x395/0xd50 kernel/softirq.c:781 tasklet_action+0x2d/0x40 kernel/softirq.c:807 __do_softirq+0x1c0/0x7d7 kernel/softirq.c:554 do_softirq+0x9a/0x100 kernel/softirq.c:455 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:382 local_bh_enable include/linux/bottom_half.h:33 [inline] __ieee80211_tx_skb_tid_band+0x28a/0x580 net/mac80211/tx.c:6099 ieee80211_tx_skb_tid+0x203/0x2a0 net/mac80211/tx.c:6126 ieee80211_mgmt_tx+0x1c87/0x2210 net/mac80211/offchannel.c:979 rdev_mgmt_tx net/wireless/rdev-ops.h:758 [inline] cfg80211_mlme_mgmt_tx+0xbdd/0x1b90 net/wireless/mlme.c:937 nl80211_tx_mgmt+0xfb0/0x1570 net/wireless/nl80211.c:12650 genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline] genl_rcv_msg+0x1214/0x12c0 net/netlink/genetlink.c:1208 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2559 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0xf4c/0x1260 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x10df/0x11f0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 ____sys_sendmsg+0x877/0xb60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Uninit was created at: slab_post_alloc_hook mm/slub.c:3804 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_node+0x613/0xc50 mm/slub.c:3888 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:577 __alloc_skb+0x35b/0x7a0 net/core/skbuff.c:668 skb_copy+0x116/0xa10 net/core/skbuff.c:2128 mac80211_hwsim_tx_frame_no_nl+0x18e1/0x2130 drivers/net/wireless/virtual/mac80211_hwsim.c:1854 mac80211_hwsim_tx+0x1c3b/0x2d90 drivers/net/wireless/virtual/mac80211_hwsim.c:2072 drv_tx net/mac80211/driver-ops.h:37 [inline] ieee80211_tx_frags+0x5ea/0xd90 net/mac80211/tx.c:1731 __ieee80211_tx+0x470/0x640 net/mac80211/tx.c:1785 ieee80211_tx+0x532/0x570 net/mac80211/tx.c:1965 ieee80211_xmit+0x54a/0x5b0 net/mac80211/tx.c:2057 __ieee80211_tx_skb_tid_band+0x27d/0x580 net/mac80211/tx.c:6098 ieee80211_tx_skb_tid+0x203/0x2a0 net/mac80211/tx.c:6126 ieee80211_mgmt_tx+0x1c87/0x2210 net/mac80211/offchannel.c:979 rdev_mgmt_tx net/wireless/rdev-ops.h:758 [inline] cfg80211_mlme_mgmt_tx+0xbdd/0x1b90 net/wireless/mlme.c:937 nl80211_tx_mgmt+0xfb0/0x1570 net/wireless/nl80211.c:12650 genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline] genl_rcv_msg+0x1214/0x12c0 net/netlink/genetlink.c:1208 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2559 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0xf4c/0x1260 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x10df/0x11f0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 ____sys_sendmsg+0x877/0xb60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x4a0 net/socket.c:2674 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 CPU: 1 PID: 5018 Comm: syz-executor547 Not tainted 6.8.0-syzkaller-13006-g4f55aa85a874 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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