------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:157 at inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:157, CPU#0: swapper/0/0
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:157
Code: b4 4f ff e9 06 fd ff ff e8 9a 4c 10 f8 90 0f 0b 90 e9 35 fe ff ff e8 8c 4c 10 f8 90 0f 0b 90 e9 c5 fe ff ff e8 7e 4c 10 f8 90 <0f> 0b 90 e9 04 ff ff ff e8 70 4c 10 f8 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc90000007d98 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88803e865ac0 RCX: ffffffff89f6f387
RDX: ffffffff8e2975c0 RSI: ffffffff89f6f482 RDI: ffffffff8e2975c0
RBP: 0000000000000090 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000090 R11: 000000000000a906 R12: ffff88803e865ac0
R13: ffff88803e865b50 R14: ffffffff81ed16dd R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880d65b6000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc02dc17dac CR3: 000000000e396000 CR4: 0000000000352ef0
DR0: 0000020000000008 DR1: 0000000000000000 DR2: 0000000000000009
DR3: 0000000000000009 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__sk_destruct+0x85/0xbb0 net/core/sock.c:2350
rcu_do_batch kernel/rcu/tree.c:2617 [inline]
rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2869
handle_softirqs+0x1ea/0x910 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xef/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: 1e 75 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d a3 9d 10 00 fb f4 bc 33 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8e207e00 EFLAGS: 00000202
RAX: 0000000000365abf RBX: ffffffff8e2975c0 RCX: ffffffff8b7afc75
RDX: 0000000000000000 RSI: ffffffff8dc524c1 RDI: ffffffff8bfa9420
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d486755
R10: ffff88806a433aab R11: 0000000000000000 R12: fffffbfff1c52eb8
R13: 0000000000000000 R14: ffffffff90b7d7d0 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x35b/0x4b0 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
rest_init+0x251/0x260 init/main.c:757
start_kernel+0x47a/0x480 init/main.c:1206
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x122/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 75 02 jne 0x4
2: c3 ret
3: cc int3
4: cc int3
5: cc int3
6: cc int3
7: 0f 1f 00 nopl (%rax)
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: f3 0f 1e fa endbr64
1e: eb 07 jmp 0x27
20: 0f 00 2d a3 9d 10 00 verw 0x109da3(%rip) # 0x109dca
27: fb sti
28: f4 hlt
* 29: e9 bc 33 03 00 jmp 0x333ea <-- trapping instruction
2e: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
35: 00 00 00
38: 66 90 xchg %ax,%ax
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop