netdev - memory leak in nr_rx

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <0000000000003d789d05915a9fa3@google.com>
Date:   Fri, 30 Aug 2019 12:28:08 -0700
From:   syzbot <syzbot+0145ea560de205bc09f0@...kaller.appspotmail.com>
To:     davem@...emloft.net, linux-hams@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        ralf@...ux-mips.org, syzkaller-bugs@...glegroups.com
Subject: memory leak in nr_rx_frame (2)

Hello,

syzbot found the following crash on:

HEAD commit:    6525771f Merge tag 'arc-5.3-rc7' of git://git.kernel.org/p..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10200912600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e6131eafb9408877
dashboard link: https://syzkaller.appspot.com/bug?extid=0145ea560de205bc09f0
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12b51f9c600000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0145ea560de205bc09f0@...kaller.appspotmail.com

2019/08/29 23:31:49 executed programs: 8
2019/08/29 23:31:56 executed programs: 15
2019/08/29 23:32:02 executed programs: 24
BUG: memory leak
unreferenced object 0xffff888123355800 (size 2048):
   comm "softirq", pid 0, jiffies 4295062008 (age 25.620s)
   hex dump (first 32 bytes):
     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
     06 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00  ...@............
   backtrace:
     [<00000000bbb1ff80>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:43 [inline]
     [<00000000bbb1ff80>] slab_post_alloc_hook mm/slab.h:522 [inline]
     [<00000000bbb1ff80>] slab_alloc mm/slab.c:3319 [inline]
     [<00000000bbb1ff80>] __do_kmalloc mm/slab.c:3653 [inline]
     [<00000000bbb1ff80>] __kmalloc+0x169/0x300 mm/slab.c:3664
     [<000000003948180d>] kmalloc include/linux/slab.h:557 [inline]
     [<000000003948180d>] sk_prot_alloc+0x112/0x170 net/core/sock.c:1603
     [<00000000ad5c33ee>] sk_alloc+0x35/0x2f0 net/core/sock.c:1657
     [<000000004e2b1f5c>] nr_make_new net/netrom/af_netrom.c:476 [inline]
     [<000000004e2b1f5c>] nr_rx_frame+0x339/0x8ee net/netrom/af_netrom.c:959
     [<00000000df4c3d82>] nr_loopback_timer+0x4e/0xd0  
net/netrom/nr_loopback.c:59
     [<00000000e886ef23>] call_timer_fn+0x45/0x1e0 kernel/time/timer.c:1322
     [<00000000cc0c55bd>] expire_timers kernel/time/timer.c:1366 [inline]
     [<00000000cc0c55bd>] __run_timers kernel/time/timer.c:1685 [inline]
     [<00000000cc0c55bd>] __run_timers kernel/time/timer.c:1653 [inline]
     [<00000000cc0c55bd>] run_timer_softirq+0x256/0x740  
kernel/time/timer.c:1698
     [<000000008a8ac853>] __do_softirq+0x115/0x33f kernel/softirq.c:292
     [<00000000c33f7c40>] invoke_softirq kernel/softirq.c:373 [inline]
     [<00000000c33f7c40>] irq_exit+0xbb/0xe0 kernel/softirq.c:413
     [<00000000dc851865>] exiting_irq arch/x86/include/asm/apic.h:537  
[inline]
     [<00000000dc851865>] smp_apic_timer_interrupt+0x96/0x190  
arch/x86/kernel/apic/apic.c:1133
     [<000000006a57c22f>] apic_timer_interrupt+0xf/0x20  
arch/x86/entry/entry_64.S:830
     [<00000000ec52384e>] arch_local_irq_restore  
arch/x86/include/asm/paravirt.h:768 [inline]
     [<00000000ec52384e>] console_unlock.part.0+0x5f0/0x6d0  
kernel/printk/printk.c:2471
     [<0000000013f07031>] console_unlock kernel/printk/printk.c:2364 [inline]
     [<0000000013f07031>] vprintk_emit+0x251/0x360  
kernel/printk/printk.c:1986
     [<00000000704abaae>] vprintk_default+0x28/0x30  
kernel/printk/printk.c:2013
     [<000000008aa8a0ba>] vprintk_func+0x59/0xfa  
kernel/printk/printk_safe.c:386
     [<000000004d884645>] printk+0x60/0x7d kernel/printk/printk.c:2046

BUG: memory leak
unreferenced object 0xffff88810e8bd820 (size 32):
   comm "softirq", pid 0, jiffies 4295062008 (age 25.620s)
   hex dump (first 32 bytes):
     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
     03 00 00 00 03 00 00 00 0f 00 00 00 00 00 00 00  ................
   backtrace:
     [<0000000092f05cd5>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:43 [inline]
     [<0000000092f05cd5>] slab_post_alloc_hook mm/slab.h:522 [inline]
     [<0000000092f05cd5>] slab_alloc mm/slab.c:3319 [inline]
     [<0000000092f05cd5>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
     [<00000000f2b13853>] kmalloc include/linux/slab.h:552 [inline]
     [<00000000f2b13853>] kzalloc include/linux/slab.h:748 [inline]
     [<00000000f2b13853>] selinux_sk_alloc_security+0x48/0xb0  
security/selinux/hooks.c:5073
     [<000000002301f7f8>] security_sk_alloc+0x49/0x70  
security/security.c:2029
     [<000000009fb5708b>] sk_prot_alloc+0x12d/0x170 net/core/sock.c:1606
     [<00000000ad5c33ee>] sk_alloc+0x35/0x2f0 net/core/sock.c:1657
     [<000000004e2b1f5c>] nr_make_new net/netrom/af_netrom.c:476 [inline]
     [<000000004e2b1f5c>] nr_rx_frame+0x339/0x8ee net/netrom/af_netrom.c:959
     [<00000000df4c3d82>] nr_loopback_timer+0x4e/0xd0  
net/netrom/nr_loopback.c:59
     [<00000000e886ef23>] call_timer_fn+0x45/0x1e0 kernel/time/timer.c:1322
     [<00000000cc0c55bd>] expire_timers kernel/time/timer.c:1366 [inline]
     [<00000000cc0c55bd>] __run_timers kernel/time/timer.c:1685 [inline]
     [<00000000cc0c55bd>] __run_timers kernel/time/timer.c:1653 [inline]
     [<00000000cc0c55bd>] run_timer_softirq+0x256/0x740  
kernel/time/timer.c:1698
     [<000000008a8ac853>] __do_softirq+0x115/0x33f kernel/softirq.c:292
     [<00000000c33f7c40>] invoke_softirq kernel/softirq.c:373 [inline]
     [<00000000c33f7c40>] irq_exit+0xbb/0xe0 kernel/softirq.c:413
     [<00000000dc851865>] exiting_irq arch/x86/include/asm/apic.h:537  
[inline]
     [<00000000dc851865>] smp_apic_timer_interrupt+0x96/0x190  
arch/x86/kernel/apic/apic.c:1133
     [<000000006a57c22f>] apic_timer_interrupt+0xf/0x20  
arch/x86/entry/entry_64.S:830
     [<00000000ec52384e>] arch_local_irq_restore  
arch/x86/include/asm/paravirt.h:768 [inline]
     [<00000000ec52384e>] console_unlock.part.0+0x5f0/0x6d0  
kernel/printk/printk.c:2471
     [<0000000013f07031>] console_unlock kernel/printk/printk.c:2364 [inline]
     [<0000000013f07031>] vprintk_emit+0x251/0x360  
kernel/printk/printk.c:1986
     [<00000000704abaae>] vprintk_default+0x28/0x30  
kernel/printk/printk.c:2013



---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches