Subject: Re: [syzbot] [wireless?] WARNING in __rate_control_send_low (2)

From: syzbot <[email-masked]>
Date: Sat, 25 May 2024 15:11:27 -0700

syzbot has found a reproducer for the following issue on:

HEAD commit:    66ad4829ddd0 Merge tag 'net-6.10-rc1' of git://git.kernel...
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16624572980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=48c05addbb27f3b0
dashboard link: https://syzkaller.appspot.com/bug?extid=8dd98a9e98ee28dc484a
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=14f181c8980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/05c6f2231ef8/disk-66ad4829.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5f4fc63b22e3/vmlinux-66ad4829.xz
kernel image: https://storage.googleapis.com/syzbot-assets/67f5c4c88729/bzImage-66ad4829.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email-masked]

netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'.
------------[ cut here ]------------
no supported rates for sta 08:02:11:00:00:01 (0xf, band 0) in rate_mask 0xfff with flags 0x10
WARNING: CPU: 1 PID: 5269 at net/mac80211/rate.c:385 __rate_control_send_low+0x659/0x890 net/mac80211/rate.c:380
Modules linked in:
CPU: 1 PID: 5269 Comm: syz-executor.2 Not tainted 6.9.0-syzkaller-12071-g66ad4829ddd0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__rate_control_send_low+0x659/0x890 net/mac80211/rate.c:380
Code: 8b 14 24 0f 85 de 01 00 00 8b 0a 48 c7 c7 20 90 e1 8c 48 8b 74 24 10 44 89 f2 44 8b 44 24 1c 44 8b 4c 24 0c e8 b8 9e 60 f6 90 <0f> 0b 90 90 e9 71 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c db
RSP: 0018:ffffc9000334eb00 EFLAGS: 00010246
RAX: 50bad2e5ba5ebe00 RBX: ffff88807bf10f44 RCX: ffff88807c4e1e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88802cd2f2a8 R08: ffffffff815847a2 R09: fffffbfff1c3996c
R10: dffffc0000000000 R11: fffffbfff1c3996c R12: 0000000000000000
R13: 000000000000000c R14: 000000000000000f R15: dffffc0000000000
FS:  00007f8c6eddf6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c6edddf78 CR3: 000000007ce9e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rate_control_send_low+0xf9/0x770 net/mac80211/rate.c:405
 rate_control_get_rate+0x20e/0x5e0 net/mac80211/rate.c:921
 ieee80211_tx_h_rate_ctrl+0xc88/0x1a10 net/mac80211/tx.c:763
 invoke_tx_handlers_late+0xb3/0x18e0 net/mac80211/tx.c:1848
 ieee80211_tx+0x2e3/0x470 net/mac80211/tx.c:1969
 __ieee80211_tx_skb_tid_band+0x4e2/0x610 net/mac80211/tx.c:6103
 ieee80211_tx_skb_tid+0x264/0x420 net/mac80211/tx.c:6131
 ieee80211_mgmt_tx+0x1b46/0x2170 net/mac80211/offchannel.c:989
 rdev_mgmt_tx net/wireless/rdev-ops.h:758 [inline]
 cfg80211_mlme_mgmt_tx+0x950/0x16a0 net/wireless/mlme.c:937
 nl80211_tx_mgmt+0xb0d/0x1190 net/wireless/nl80211.c:12651
 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2585
 ___sys_sendmsg net/socket.c:2639 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2668
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8c6e07cee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8c6eddf0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8c6e1abf80 RCX: 00007f8c6e07cee9
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007f8c6e0c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8c6e1abf80 R15: 00007ffccd0b27a8
 </TASK>

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