------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62d/0x740, CPU#0: syz.1.1353/11808
Modules linked in:
CPU: 0 UID: 0 PID: 11808 Comm: syz.1.1353 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:inet_sock_destruct+0x62d/0x740
Code: 0f 0b 90 e9 58 fe ff ff e8 10 a8 9d f7 90 0f 0b 90 e9 8b fe ff ff e8 02 a8 9d f7 90 0f 0b 90 e9 b1 fe ff ff e8 f4 a7 9d f7 90 <0f> 0b 90 e9 d7 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 95 fc
RSP: 0018:ffffc90000007d20 EFLAGS: 00010246
RAX: ffffffff8a281ccc RBX: dffffc0000000000 RCX: ffff88818fc1d880
RDX: 0000000000000100 RSI: 0000000000000f70 RDI: 0000000000000000
RBP: 0000000000000f70 R08: ffff88816d5d3e27 R09: 1ffff1102daba7c4
R10: dffffc0000000000 R11: ffffed102daba7c5 R12: ffff88816d5d3b80
R13: ffff88816d5d4088 R14: ffff88816d5d3e0c R15: ffffffff8feb2d40
FS:  00007f58782ac6c0(0000) GS:ffff88818dc76000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc9313e3440 CR3: 0000000111e58000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __sk_destruct+0x8d/0x9d0
 rcu_core+0x7cd/0x1070
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0xdea/0x2550
Code: 66 10 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 20 0f b6 04 01 84 c0 0f 85 2c 12 00 00 41 83 3e 00 0f 95 c0 49 39 df 0f 96 c1 <20> c1 49 39 dc 0f 97 c0 20 c8 3c 01 75 18 48 8d 43 08 4c 39 f8 0f
RSP: 0018:ffffc9000705f298 EFLAGS: 00000297
RAX: 0000000000000001 RBX: ffffc9000705fdb8 RCX: 1ffff92000e0be01
RDX: ffffffff90d1da40 RSI: 0000000000000002 RDI: ffffffff8c28b700
RBP: 1ffff92000e0be6e R08: 0000000000000001 R09: ffffffff8e95cca0
R10: ffffc9000705f3b8 R11: ffffffff81b0f020 R12: ffffc90007060000
R13: 1ffff92000e0be6f R14: ffffc9000705f368 R15: ffffc90007058000
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x2bc/0x650
 ptlock_alloc+0x20/0x70
 pte_alloc_one+0x7a/0x370
 do_pte_missing+0x1214/0x33f0
 handle_mm_fault+0x1bd9/0x3170
 __get_user_pages+0x1683/0x2720
 populate_vma_page_range+0x2be/0x3c0
 __mm_populate+0x25f/0x390
 vm_mmap_pgoff+0x3aa/0x4f0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f587739ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f58782ac028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f5877615fa0 RCX: 00007f587739ce59
RDX: b635773f07ebbeef RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f5877432d6f R08: ffffffffffffffff R09: 00000000215eb000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5877616038 R14: 00007f5877615fa0 R15: 00007ffc8e1d2fd8
 </TASK>
