------------[ 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#1: syz.9.12089/23588
Modules linked in:
CPU: 1 UID: 0 PID: 23588 Comm: syz.9.12089 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: c9 4e ff e9 06 fd ff ff e8 5a 18 01 f8 90 0f 0b 90 e9 35 fe ff ff e8 4c 18 01 f8 90 0f 0b 90 e9 c5 fe ff ff e8 3e 18 01 f8 90 <0f> 0b 90 e9 04 ff ff ff e8 30 18 01 f8 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc900006a0d98 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888023af8000 RCX: ffffffff8a0780e7
RDX: ffff88802f868000 RSI: ffffffff8a0781e2 RDI: ffff88802f868000
RBP: 0000000000000f70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000f70 R11: 0000000000000000 R12: ffff888023af8000
R13: ffff888023af8090 R14: ffffffff81ee5ced R15: 0000000000000001
FS:  00007f34eddf66c0(0000) GS:ffff8880d644d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3a3e18 CR3: 00000000544b7000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000044 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __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+0x1eb/0x9e0 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 7a 03 53 f6 48 89 df e8 62 53 53 f6 e8 5d d6 7e f6 fb bf 01 00 00 00 <e8> 02 8a 43 f6 65 8b 05 0b 6f 7b 08 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc90003b6f430 EFLAGS: 00000202
RAX: 0000000000000937 RBX: ffff8880484b2400 RCX: 0000000000000040
RDX: 0000000000000000 RSI: ffffffff8de6e8d1 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffffc90003b6f4a8 R14: 0000000000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 shmem_add_to_page_cache+0x874/0xcd0 mm/shmem.c:928
 shmem_alloc_and_add_folio+0x558/0xd40 mm/shmem.c:1998
 shmem_get_folio_gfp+0x6ab/0x1900 mm/shmem.c:2567
 shmem_read_folio_gfp+0xc8/0x150 mm/shmem.c:5982
 drm_gem_get_pages+0x1f6/0xa00 drivers/gpu/drm/drm_gem.c:695
 drm_gem_shmem_get_pages_locked+0x1e6/0x4b0 drivers/gpu/drm/drm_gem_shmem_helper.c:222
 drm_gem_shmem_pin_locked+0x224/0x470 drivers/gpu/drm/drm_gem_shmem_helper.c:283
 drm_gem_map_attach+0x184/0x270 drivers/gpu/drm/drm_prime.c:621
 dma_buf_dynamic_attach.part.0+0x1dd/0x790 drivers/dma-buf/dma-buf.c:1035
 dma_buf_dynamic_attach drivers/dma-buf/dma-buf.c:1017 [inline]
 dma_buf_attach+0x34/0x70 drivers/dma-buf/dma-buf.c:1065
 drm_gem_shmem_prime_import_no_map drivers/gpu/drm/drm_gem_shmem_helper.c:877 [inline]
 drm_gem_shmem_prime_import_no_map+0x67/0x390 drivers/gpu/drm/drm_gem_shmem_helper.c:858
 drm_gem_prime_fd_to_handle+0x1a3/0x5e0 drivers/gpu/drm/drm_prime.c:314
 drm_prime_fd_to_handle_ioctl+0xd6/0x110 drivers/gpu/drm/drm_prime.c:372
 drm_ioctl_kernel+0x1f3/0x3e0 drivers/gpu/drm/drm_ioctl.c:804
 drm_ioctl+0x5e6/0xc60 drivers/gpu/drm/drm_ioctl.c:901
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f34efb9bf79
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:00007f34eddf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f34efe15fa0 RCX: 00007f34efb9bf79
RDX: 0000200000000300 RSI: 00000000c00c642e RDI: 0000000000000007
RBP: 00007f34efc327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f34efe16038 R14: 00007f34efe15fa0 R15: 00007ffd240fd958
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	f3 0f 1e fa          	endbr64
   5:	53                   	push   %rbx
   6:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	48 83 c7 18          	add    $0x18,%rdi
  12:	e8 7a 03 53 f6       	call   0xf6530391
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 62 53 53 f6       	call   0xf6535381
  1f:	e8 5d d6 7e f6       	call   0xf67ed681
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 02 8a 43 f6       	call   0xf6438a31 <-- trapping instruction
  2f:	65 8b 05 0b 6f 7b 08 	mov    %gs:0x87b6f0b(%rip),%eax        # 0x87b6f41
  36:	85 c0                	test   %eax,%eax
  38:	74 06                	je     0x40
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3