linux-kernel - Re: [syzbot] [wireless?] WARNING in rate_control_rate

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Message-ID: <000000000000ee00d1060b48b316@google.com>
Date:   Wed, 29 Nov 2023 03:19:04 -0800
From:   syzbot <syzbot+62d7eef57b09bfebcd84@...kaller.appspotmail.com>
To:     eadavis@...com, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [wireless?] WARNING in rate_control_rate_init (2)

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
UBSAN: shift-out-of-bounds in sta_link_apply_parameters

================================================================================
UBSAN: shift-out-of-bounds in net/mac80211/cfg.c:1798:30
shift exponent -1 is negative
CPU: 1 PID: 5418 Comm: syz-executor.0 Not tainted 6.4.0-syzkaller-01647-g6e2332e0ab53-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_shift_out_of_bounds+0x2a6/0x480 lib/ubsan.c:387
 sta_link_apply_parameters.cold+0x1a/0x1f net/mac80211/cfg.c:1798
 sta_apply_parameters+0x87d/0x16b0 net/mac80211/cfg.c:1988
 ieee80211_add_station+0x3ca/0x610 net/mac80211/cfg.c:2070
 rdev_add_station net/wireless/rdev-ops.h:201 [inline]
 nl80211_new_station+0x13e8/0x1af0 net/wireless/nl80211.c:7564
 genl_family_rcv_msg_doit.isra.0+0x1ef/0x2d0 net/netlink/genetlink.c:968
 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline]
 genl_rcv_msg+0x559/0x800 net/netlink/genetlink.c:1065
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2546
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:725 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:748
 ____sys_sendmsg+0x69f/0x950 net/socket.c:2504
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2558
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2587
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f084287cae9
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:00007f084350a0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f084299bf80 RCX: 00007f084287cae9
RDX: 0000000000000000 RSI: 00000000200004c0 RDI: 0000000000000004
RBP: 00007f08428c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f084299bf80 R15: 00007ffe7b058668
 </TASK>
================================================================================


Tested on:

commit:         6e2332e0 Merge tag 'cgroup-for-6.5' of git://git.kerne..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=1250b438e80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=102b18358d5797d8
dashboard link: https://syzkaller.appspot.com/bug?extid=62d7eef57b09bfebcd84
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=13b51b78e80000