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Message-ID: <000000000000b6d882061dfb4aa6@google.com> Date: Wed, 24 Jul 2024 02:56:27 -0700 From: syzbot <syzbot+0f3afa93b91202f21939@...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 cfg80211_inform_bss_frame_data Hello, syzbot found the following issue on: HEAD commit: 933069701c1b Merge tag '6.11-rc-smb3-server-fixes' of git:.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=106cf811980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c062b3d00b275b52 dashboard link: https://syzkaller.appspot.com/bug?extid=0f3afa93b91202f21939 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/11dcaf5ed4bb/disk-93306970.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6b2d786e6c09/vmlinux-93306970.xz kernel image: https://storage.googleapis.com/syzbot-assets/c6cd729a2bbd/bzImage-93306970.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0f3afa93b91202f21939@...kaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in cfg80211_find_elem_match net/wireless/scan.c:1364 [inline] BUG: KMSAN: uninit-value in cfg80211_find_elem include/net/cfg80211.h:6858 [inline] BUG: KMSAN: uninit-value in cfg80211_inform_bss_frame_data+0x3e3/0x9e0 net/wireless/scan.c:3225 cfg80211_find_elem_match net/wireless/scan.c:1364 [inline] cfg80211_find_elem include/net/cfg80211.h:6858 [inline] cfg80211_inform_bss_frame_data+0x3e3/0x9e0 net/wireless/scan.c:3225 ieee80211_bss_info_update+0x900/0xad0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x8f6/0xbd0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5225 [inline] ieee80211_rx_list+0x55c9/0x6690 net/mac80211/rx.c:5462 ieee80211_rx_napi+0x84/0x3f0 net/mac80211/rx.c:5485 ieee80211_rx include/net/mac80211.h:5124 [inline] ieee80211_handle_queued_frames+0x1a8/0x340 net/mac80211/main.c:439 ieee80211_tasklet_handler+0x25/0x30 net/mac80211/main.c:458 tasklet_action_common+0x395/0xd50 kernel/softirq.c:785 tasklet_action+0x2d/0x40 kernel/softirq.c:811 handle_softirqs+0x1ce/0x800 kernel/softirq.c:554 __do_softirq+0x14/0x1a kernel/softirq.c:588 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] rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline] __dev_queue_xmit+0x2692/0x5610 net/core/dev.c:4450 dev_queue_xmit include/linux/netdevice.h:3105 [inline] __netlink_deliver_tap_skb net/netlink/af_netlink.c:307 [inline] __netlink_deliver_tap+0x84c/0xc90 net/netlink/af_netlink.c:325 netlink_deliver_tap net/netlink/af_netlink.c:338 [inline] __netlink_sendskb net/netlink/af_netlink.c:1275 [inline] netlink_sendskb+0x23c/0x270 net/netlink/af_netlink.c:1284 netlink_unicast+0x70e/0x1260 net/netlink/af_netlink.c:1372 nlmsg_unicast include/net/netlink.h:1158 [inline] netlink_ack+0xb04/0xe80 net/netlink/af_netlink.c:2512 netlink_rcv_skb+0x510/0x650 net/netlink/af_netlink.c:2556 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 __sys_sendto+0x685/0x830 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2212 x64_sys_call+0x3799/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:3994 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4080 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:583 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] hwsim_cloned_frame_received_nl+0x311/0x1360 drivers/net/wireless/virtual/mac80211_hwsim.c:5850 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x1214/0x12c0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2550 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:745 __sys_sendto+0x685/0x830 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2212 x64_sys_call+0x3799/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 9452 Comm: syz.4.940 Not tainted 6.10.0-syzkaller-11840-g933069701c1b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ===================================================== --- 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 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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