------------[ 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#0: modprobe/30080
Modules linked in:
CPU: 0 UID: 0 PID: 30080 Comm: modprobe 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 e4 a0 f7 90 0f 0b 90 e9 8b fe ff ff e8 54 e4 a0 f7 90 0f 0b 90 e9 b1 fe ff ff e8 46 e4 a0 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:ffffc90000007d28 EFLAGS: 00010246
RAX: ffffffff8a2511da RBX: dffffc0000000000 RCX: ffff8880292e3e00
RDX: 0000000000000100 RSI: 0000000000000090 RDI: 0000000000000000
RBP: 0000000000000090 R08: ffff88807bc524a7 R09: 1ffff1100f78a494
R10: dffffc0000000000 R11: ffffed100f78a495 R12: ffff88807bc52200
R13: dffffc0000000000 R14: ffff88807bc5248c R15: ffffffff8feb2640
FS:  0000000000000000(0000) GS:ffff88812527c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7396cf9a10 CR3: 0000000081f2c000 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:__sanitizer_cov_trace_pc+0x5c/0x70 kernel/kcov.c:235
Code: f8 16 00 00 83 fa 02 75 21 48 8b 91 00 17 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <c3> cc cc cc cc cc 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000e066eb8 EFLAGS: 00000293
RAX: ffffffff8ba233da RBX: ffffc9000e067080 RCX: ffff8880292e3e00
RDX: 0000000000000000 RSI: 00007f7396f47fff RDI: 00007f7396f47fff
RBP: dffffc0000000000 R08: ffff8880292e3e00 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000000 R12: ffff888055eea600
R13: 00007f7396f47fff R14: 000000000000000e R15: 00007f7396f47fff
 ma_data_end lib/maple_tree.c:1239 [inline]
 mas_next_node+0xd0a/0xe50 lib/maple_tree.c:4085
 mas_dfs_postorder lib/maple_tree.c:6417 [inline]
 mt_validate+0x2db2/0x4260 lib/maple_tree.c:6951
 validate_mm+0xd4/0x4f0 mm/vma.c:652
 __split_vma+0x916/0xa50 mm/vma.c:570
 vms_gather_munmap_vmas+0x4e3/0x1370 mm/vma.c:1448
 __mmap_setup mm/vma.c:2439 [inline]
 __mmap_region mm/vma.c:2753 [inline]
 mmap_region+0x909/0x2340 mm/vma.c:2857
 do_mmap+0xc3b/0x10c0 mm/mmap.c:560
 vm_mmap_pgoff+0x272/0x4e0 mm/util.c:581
 ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:606
 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: 0033:0x7f7397026242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffeae373b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f7396c94000 RCX: 00007f7397026242
RDX: 0000000000000005 RSI: 0000000000037000 RDI: 00007f7396c94000
RBP: 0000000000000812 R08: 0000000000000000 R09: 0000000000003000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffeae373bc8
R13: 00007f7396cfd6b0 R14: 00007ffeae373fb0 R15: 00000fffd5c6e772
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	83 fa 02             	cmp    $0x2,%edx
   5:	75 21                	jne    0x28
   7:	48 8b 91 00 17 00 00 	mov    0x1700(%rcx),%rdx
   e:	48 8b 32             	mov    (%rdx),%rsi
  11:	48 8d 7e 01          	lea    0x1(%rsi),%rdi
  15:	8b 89 fc 16 00 00    	mov    0x16fc(%rcx),%ecx
  1b:	48 39 cf             	cmp    %rcx,%rdi
  1e:	73 08                	jae    0x28
  20:	48 89 3a             	mov    %rdi,(%rdx)
  23:	48 89 44 f2 08       	mov    %rax,0x8(%rdx,%rsi,8)
* 28:	c3                   	ret <-- trapping instruction
  29:	cc                   	int3
  2a:	cc                   	int3
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	66 66 66 66 66 2e 0f 	data16 data16 data16 data16 cs nopw 0x0(%rax,%rax,1)
  35:	1f 84 00 00 00 00 00
  3c:	90                   	nop
  3d:	90                   	nop