------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x62b/0x740 net/ipv4/af_inet.c:162, CPU#1: cmp/19707
Modules linked in:
CPU: 1 UID: 0 PID: 19707 Comm: cmp Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:inet_sock_destruct+0x62b/0x740 net/ipv4/af_inet.c:162
Code: 0f 0b 90 e9 58 fe ff ff e8 62 f2 7a f7 90 0f 0b 90 e9 8b fe ff ff e8 54 f2 7a f7 90 0f 0b 90 e9 b1 fe ff ff e8 46 f2 7a 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:ffffc90000a08d28 EFLAGS: 00010246
RAX: ffffffff8a4b7f7a RBX: dffffc0000000000 RCX: ffff88802927dd00
RDX: 0000000000000100 RSI: 0000000000000090 RDI: 0000000000000000
RBP: 0000000000000090 R08: ffff88807b674f27 R09: 1ffff1100f6ce9e4
R10: dffffc0000000000 R11: ffffed100f6ce9e5 R12: ffff88807b674c80
R13: dffffc0000000000 R14: ffff88807b674f0c R15: ffffffff9010c800
FS:  0000000000000000(0000) GS:ffff888125060000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc6fadaeff8 CR3: 00000000791ba000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __sk_destruct+0x89/0x9d0 net/core/sock.c:2357
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core+0x78b/0x10a0 kernel/rcu/tree.c:2897
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 41 20 2c 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 2b db c9 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 10 21 2f 0a cc 48 8d 3d b8 77 b8
RSP: 0018:ffffc90005b4f260 EFLAGS: 00000286
RAX: a369b11e2abb7700 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000270d408f RSI: ffffffff8e4afadf RDI: ffffffff8c4bd280
RBP: ffffffff8176f21f R08: ffffffff8176f21f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c20 R12: 0000000000000002
R13: ffffffff8eb59c20 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 rcu_read_lock include/linux/rcupdate.h:840 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
 unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x32d/0x660 mm/slub.c:5515
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 slab_free_hook mm/slub.c:2657 [inline]
 slab_free mm/slub.c:6405 [inline]
 kmem_cache_free+0x156/0x650 mm/slub.c:6532
 tear_down_vmas+0x312/0x520 mm/mmap.c:1262
 exit_mmap+0x4ca/0x9f0 mm/mmap.c:1320
 __mmput+0x118/0x420 kernel/fork.c:1182
 exec_mm_put_old fs/exec.c:916 [inline]
 setup_new_exec+0x30d/0x360 fs/exec.c:1353
 load_elf_binary+0xbcf/0x2950 fs/binfmt_elf.c:1024
 search_binary_handler fs/exec.c:1694 [inline]
 exec_binprm fs/exec.c:1726 [inline]
 bprm_execve+0x9c7/0x1630 fs/exec.c:1778
 do_execveat_common+0x4f4/0x670 fs/exec.c:1876
 __do_sys_execve fs/exec.c:1949 [inline]
 __se_sys_execve fs/exec.c:1943 [inline]
 __x64_sys_execve+0x97/0xc0 fs/exec.c:1943
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f45db074107
Code: Unable to access opcode bytes at 0x7f45db0740dd.
RSP: 002b:00007ffecff7fbe8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000557d6a47b1a8 RCX: 00007f45db074107
RDX: 0000557d6a476e28 RSI: 0000557d6a47b1a8 RDI: 0000557d6a476eb0
RBP: 0000557d6a476eb0 R08: 00007ffecff83eba R09: 0000000000000210
R10: 0000000000000002 R11: 0000000000000246 R12: 0000557d6a476e28
R13: 00007f45db239e8b R14: 0000557d6a476e28 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff                   	ljmp   (bad)
   1:	e8 41 20 2c 0a       	call   0xa2c2047
   6:	f7 44 24 08 00 02 00 	testl  $0x200,0x8(%rsp)
   d:	00
   e:	0f 84 3a ff ff ff    	je     0xffffff4e
  14:	65 48 8b 05 2b db c9 	mov    %gs:0x11c9db2b(%rip),%rax        # 0x11c9db47
  1b:	11
  1c:	48 3b 44 24 58       	cmp    0x58(%rsp),%rax
  21:	75 33                	jne    0x56
  23:	fb                   	sti
  24:	48 83 c4 60          	add    $0x60,%rsp
* 28:	5b                   	pop    %rbx <-- trapping instruction
  29:	41 5c                	pop    %r12
  2b:	41 5d                	pop    %r13
  2d:	41 5e                	pop    %r14
  2f:	41 5f                	pop    %r15
  31:	5d                   	pop    %rbp
  32:	e9 10 21 2f 0a       	jmp    0xa2f2147
  37:	cc                   	int3
  38:	48                   	rex.W
  39:	8d                   	.byte 0x8d
  3a:	3d                   	.byte 0x3d
  3b:	b8                   	.byte 0xb8
  3c:	77 b8                	ja     0xfffffff6