linux-kernel - Re: [syzbot] memory leak in cfg80211_inform_single_bss_frame

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Message-ID: <181f7180015.1ea4d3b3328398.7889962633178976958@siddh.me>
Date:   Wed, 13 Jul 2022 15:55:54 +0530
From:   Siddh Raman Pant <code@...dh.me>
To:     "syzbot" <syzbot+7a942657a255a9d9b18a@...kaller.appspotmail.com>
Cc:     "davem" <davem@...emloft.net>,
        "johannes" <johannes@...solutions.net>, "kuba" <kuba@...nel.org>,
        "linux-kernel" <linux-kernel@...r.kernel.org>,
        "linux-wireless" <linux-wireless@...r.kernel.org>,
        "netdev" <netdev@...r.kernel.org>,
        "syzkaller-bugs" <syzkaller-bugs@...glegroups.com>
Subject: Re: [syzbot] memory leak in cfg80211_inform_single_bss_frame_data

Syzbot didn't give full log (did it crash?), so trying again.

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

On Wed, 13 Jul 2022 14:38:08 +0530  syzbot <syzbot+7a942657a255a9d9b18a@...kaller.appspotmail.com> wrote
 > Hello,
 > 
 > syzbot has tested the proposed patch but the reproducer is still triggering an issue:
 > memory leak in regulatory_init_db
 > 
 > BUG: memory leak
 > unreferenced object 0xffff8881450dc880 (size 64):
 >   comm "swapper/0", pid 1, jiffies 4294937974 (age 80.900s)
 >   hex dump (first 32 bytes):
 >     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
 >     ff ff ff ff 00 00 00 00 00 00 00 00 30 30 00 00  ............00..
 >   backtrace:
 >     [<ffffffff86ff026b>] kmalloc include/linux/slab.h:600 [inline]
 >     [<ffffffff86ff026b>] kzalloc include/linux/slab.h:733 [inline]
 >     [<ffffffff86ff026b>] regulatory_hint_core net/wireless/reg.c:3216 [inline]
 >     [<ffffffff86ff026b>] regulatory_init_db+0x22f/0x2de net/wireless/reg.c:4277
 >     [<ffffffff81000fe3>] do_one_initcall+0x63/0x2e0 init/main.c:1295
 >     [<ffffffff86f4eb10>] do_initcall_level init/main.c:1368 [inline]
 >     [<ffffffff86f4eb10>] do_initcalls init/main.c:1384 [inline]
 >     [<ffffffff86f4eb10>] do_basic_setup init/main.c:1403 [inline]
 >     [<ffffffff86f4eb10>] kernel_init_freeable+0x255/0x2cf init/main.c:1610
 >     [<ffffffff845b427a>] kernel_init+0x1a/0x1c0 init/main.c:1499
 >     [<ffffffff8100225f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 > 
 > [   88.
 > 
 > 
 > Tested on:
 > 
 > commit:         b047602d Merge tag 'trace-v5.19-rc5' of git://git.kern..
 > git tree:       upstream
 > console output: https://syzkaller.appspot.com/x/log.txt?x=13d4252a080000
 > kernel config:  https://syzkaller.appspot.com/x/.config?x=689b5fe7168a1260
 > dashboard link: https://syzkaller.appspot.com/bug?extid=7a942657a255a9d9b18a
 > compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
 > 
 > Note: no patches were applied.
 >