memory leak in nr_rx_frame (2)

16 views

Skip to first unread message

syzbot

unread,

Aug 30, 2019, 3:28:09 PM8/30/19

to da...@davemloft.net, linux...@vger.kernel.org, linux-...@vger.kernel.org, net...@vger.kernel.org, ra...@linux-mips.org, syzkall...@googlegroups.com

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+0145ea...@syzkaller.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 syzk...@googlegroups.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

syzbot

unread,

Sep 3, 2019, 10:35:08 AM9/3/19

to da...@davemloft.net, linux...@vger.kernel.org, linux-...@vger.kernel.org, net...@vger.kernel.org, ra...@linux-mips.org, syzkall...@googlegroups.com

syzbot has found a reproducer for the following crash on:

HEAD commit: 089cf7f6 Linux 5.3-rc7
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14100532600000
kernel config: https://syzkaller.appspot.com/x/.config?x=b10436cfda3838d9

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=124dcf8e600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=115f2346600000

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

executing program
executing program
executing program
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88810de01800 (size 2048):
comm "softirq", pid 0, jiffies 4294947090 (age 27.260s)

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:

[<0000000002377dcf>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<0000000002377dcf>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<0000000002377dcf>] slab_alloc mm/slab.c:3319 [inline]
[<0000000002377dcf>] __do_kmalloc mm/slab.c:3653 [inline]
[<0000000002377dcf>] __kmalloc+0x169/0x300 mm/slab.c:3664
[<00000000af16d1f0>] kmalloc include/linux/slab.h:557 [inline]
[<00000000af16d1f0>] sk_prot_alloc+0x112/0x170 net/core/sock.c:1603
[<00000000b9033c4c>] sk_alloc+0x35/0x2f0 net/core/sock.c:1657
[<00000000fb9e6269>] nr_make_new net/netrom/af_netrom.c:476 [inline]
[<00000000fb9e6269>] nr_rx_frame+0x339/0x8ee net/netrom/af_netrom.c:959
[<00000000fca3a307>] nr_loopback_timer+0x4e/0xd0
net/netrom/nr_loopback.c:59
[<0000000009d4e723>] call_timer_fn+0x45/0x1e0 kernel/time/timer.c:1322
[<0000000047ea1d35>] expire_timers kernel/time/timer.c:1366 [inline]
[<0000000047ea1d35>] __run_timers kernel/time/timer.c:1685 [inline]
[<0000000047ea1d35>] __run_timers kernel/time/timer.c:1653 [inline]
[<0000000047ea1d35>] run_timer_softirq+0x256/0x740
kernel/time/timer.c:1698
[<00000000e53c6536>] __do_softirq+0x115/0x33f kernel/softirq.c:292
[<0000000024be59bc>] invoke_softirq kernel/softirq.c:373 [inline]
[<0000000024be59bc>] irq_exit+0xbb/0xe0 kernel/softirq.c:413
[<0000000080d19282>] exiting_irq arch/x86/include/asm/apic.h:537
[inline]
[<0000000080d19282>] smp_apic_timer_interrupt+0x96/0x190
arch/x86/kernel/apic/apic.c:1133
[<000000000e93dbd5>] apic_timer_interrupt+0xf/0x20
arch/x86/entry/entry_64.S:830
[<000000002864ce39>] native_safe_halt+0xe/0x10
arch/x86/include/asm/irqflags.h:60
[<000000007e3841ad>] arch_cpu_idle+0xa/0x10
arch/x86/kernel/process.c:571
[<00000000546bc34f>] default_idle_call+0x1e/0x40 kernel/sched/idle.c:94
[<00000000e98df687>] cpuidle_idle_call kernel/sched/idle.c:154 [inline]
[<00000000e98df687>] do_idle+0x1ea/0x2c0 kernel/sched/idle.c:263
[<000000001e3f823f>] cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354

BUG: memory leak
unreferenced object 0xffff88810fa3c9a0 (size 32):
comm "softirq", pid 0, jiffies 4294947090 (age 27.260s)