Re: memory leak in nr_rx_frame (2)

From: syzbot
Date: Tue Sep 03 2019 - 10:35:13 EST

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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+0145ea560de205bc09f0@xxxxxxxxxxxxxxxxxxxxxxxxx

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)
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:
[<00000000e9077829>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000e9077829>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000e9077829>] slab_alloc mm/slab.c:3319 [inline]
[<00000000e9077829>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<0000000037f78c54>] kmalloc include/linux/slab.h:552 [inline]
[<0000000037f78c54>] kzalloc include/linux/slab.h:748 [inline]
[<0000000037f78c54>] selinux_sk_alloc_security+0x48/0xb0 security/selinux/hooks.c:5073
[<00000000313a65ff>] security_sk_alloc+0x49/0x70 security/security.c:2029
[<00000000ffa4a0b0>] sk_prot_alloc+0x12d/0x170 net/core/sock.c:1606
[<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

BUG: memory leak
unreferenced object 0xffff88810de01800 (size 2048):
comm "softirq", pid 0, jiffies 4294947090 (age 30.780s)
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 30.780s)
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:
[<00000000e9077829>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000e9077829>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000e9077829>] slab_alloc mm/slab.c:3319 [inline]
[<00000000e9077829>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<0000000037f78c54>] kmalloc include/linux/slab.h:552 [inline]
[<0000000037f78c54>] kzalloc include/linux/slab.h:748 [inline]
[<0000000037f78c54>] selinux_sk_alloc_security+0x48/0xb0 security/selinux/hooks.c:5073
[<00000000313a65ff>] security_sk_alloc+0x49/0x70 security/security.c:2029
[<00000000ffa4a0b0>] sk_prot_alloc+0x12d/0x170 net/core/sock.c:1606
[<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

BUG: memory leak
unreferenced object 0xffff88810de01800 (size 2048):
comm "softirq", pid 0, jiffies 4294947090 (age 32.010s)
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 32.010s)
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:
[<00000000e9077829>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000e9077829>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000e9077829>] slab_alloc mm/slab.c:3319 [inline]
[<00000000e9077829>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<0000000037f78c54>] kmalloc include/linux/slab.h:552 [inline]
[<0000000037f78c54>] kzalloc include/linux/slab.h:748 [inline]
[<0000000037f78c54>] selinux_sk_alloc_security+0x48/0xb0 security/selinux/hooks.c:5073
[<00000000313a65ff>] security_sk_alloc+0x49/0x70 security/security.c:2029
[<00000000ffa4a0b0>] sk_prot_alloc+0x12d/0x170 net/core/sock.c:1606
[<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

BUG: memory leak
unreferenced object 0xffff88810de01800 (size 2048):
comm "softirq", pid 0, jiffies 4294947090 (age 32.080s)
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 32.080s)
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:
[<00000000e9077829>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000e9077829>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000e9077829>] slab_alloc mm/slab.c:3319 [inline]
[<00000000e9077829>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<0000000037f78c54>] kmalloc include/linux/slab.h:552 [inline]
[<0000000037f78c54>] kzalloc include/linux/slab.h:748 [inline]
[<0000000037f78c54>] selinux_sk_alloc_security+0x48/0xb0 security/selinux/hooks.c:5073
[<00000000313a65ff>] security_sk_alloc+0x49/0x70 security/security.c:2029
[<00000000ffa4a0b0>] sk_prot_alloc+0x12d/0x170 net/core/sock.c:1606
[<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

BUG: memory leak
unreferenced object 0xffff88810de01800 (size 2048):
comm "softirq", pid 0, jiffies 4294947090 (age 32.150s)
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 32.150s)
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:
[<00000000e9077829>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
[<00000000e9077829>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000e9077829>] slab_alloc mm/slab.c:3319 [inline]
[<00000000e9077829>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
[<0000000037f78c54>] kmalloc include/linux/slab.h:552 [inline]
[<0000000037f78c54>] kzalloc include/linux/slab.h:748 [inline]
[<0000000037f78c54>] selinux_sk_alloc_security+0x48/0xb0 security/selinux/hooks.c:5073
[<00000000313a65ff>] security_sk_alloc+0x49/0x70 security/security.c:2029
[<00000000ffa4a0b0>] sk_prot_alloc+0x12d/0x170 net/core/sock.c:1606
[<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

executing program
executing program
executing program

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