------------[ cut here ]------------
WARNING: CPU: 1 PID: 6501 at net/ipv4/af_inet.c:157 inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Modules linked in:
CPU: 1 PID: 6501 Comm: syz.4.829 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:inet_sock_destruct+0x63b/0x730 net/ipv4/af_inet.c:157
Code: 01 e8 d9 d9 03 f9 0f 0b e9 64 fe ff ff e8 cd d9 03 f9 0f 0b e9 99 fe ff ff e8 c1 d9 03 f9 0f 0b e9 c1 fe ff ff e8 b5 d9 03 f9 <0f> 0b e9 e9 fe ff ff 44 89 f1 80 e1 07 fe c1 38 c1 0f 8c 5b fd ff
RSP: 0018:ffffc90000dd0b20 EFLAGS: 00010246
RAX: ffffffff8875488b RBX: dffffc0000000000 RCX: ffff8880218f5940
RDX: 0000000000000100 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000080000000 R08: ffff88802590c17f R09: 1ffff11004b2182f
R10: dffffc0000000000 R11: ffffed1004b21830 R12: ffff88802590bf00
R13: ffff88802590bf00 R14: ffff88802590c120 R15: 1ffff11004b217e2
FS:  00005555851d3500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c28e107 CR3: 000000005f8ee000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __sk_destruct+0x50/0x840 net/core/sock.c:1961
 sock_put include/net/sock.h:1989 [inline]
 sctp_endpoint_destroy_rcu+0x9d/0xe0 net/sctp/endpointola.c:193
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0x9d2/0x1670 kernel/rcu/tree.c:2763
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x0/0x80 kernel/kcov.c:280
Code: 28 4d 39 ca 77 1e 4a c7 44 02 08 06 00 00 00 4a 89 7c 02 10 4a 89 74 02 18 4a 89 44 02 20 48 ff c1 48 89 0a c3 0f 1f 44 00 00 <48> 8b 04 24 65 48 8b 0d 14 4b 89 7e 65 8b 15 15 4b 89 7e 81 e2 00
RSP: 0018:ffffc9000328f570 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000079000420 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 000000000000002e RDI: 0000000000000040
RBP: ffffc9000328f850 R08: ffff888079000000 R09: 00000000000f0001
R10: dffffc0000000000 R11: fffffbfff1b13b86 R12: ffffea0000000000
R13: ffff888078f93000 R14: 000000000000002e R15: ffff888140007a00
 phys_addr_valid arch/x86/mm/physaddr.h:7 [inline]
 __phys_addr+0x86/0x170 arch/x86/mm/physaddr.c:28
 virt_to_head_page include/linux/mm.h:911 [inline]
 ___cache_free+0x2a/0x120 mm/slub.c:3511
 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
 slab_alloc_node mm/slub.c:3225 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 kmem_cache_alloc+0x100/0x290 mm/slub.c:3238
 kmem_cache_zalloc include/linux/slab.h:728 [inline]
 jbd2_alloc_handle include/linux/jbd2.h:1597 [inline]
 new_handle fs/jbd2/transaction.c:477 [inline]
 jbd2__journal_start+0x13c/0x5a0 fs/jbd2/transaction.c:504
 __ext4_journal_start_sb+0x167/0x360 fs/ext4/ext4_jbd2.c:105
 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
 ext4_dirty_inode+0x8b/0x100 fs/ext4/inode.c:6055
 __mark_inode_dirty+0x2c8/0xc90 fs/fs-writeback.c:2480
 generic_update_time+0x1cd/0x1f0 fs/inode.c:1881
 inode_update_time fs/inode.c:1894 [inline]
 file_update_time+0x3c0/0x440 fs/inode.c:2083
 ext4_page_mkwrite+0x1bc/0x1250 fs/ext4/inode.c:6176
 do_page_mkwrite+0x168/0x3c0 mm/memory.c:2922
 do_shared_fault mm/memory.c:4328 [inline]
 do_fault mm/memory.c:4396 [inline]
 handle_pte_fault mm/memory.c:4650 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x1d87/0x4410 mm/memory.c:4883
 do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1355
 handle_page_fault arch/x86/mm/fault.c:1443 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f2850353143
Code: 80 00 00 00 8b b4 24 c0 00 00 00 89 30 e9 90 fa ff ff 48 89 c2 48 8d 35 39 97 1c 00 48 8d 3d ef 97 1c 00 31 c0 e8 0d 7f fe ff <89> 32 e9 78 ef ff ff 48 8d 05 bf f5 36 00 48 8d 3d c8 b5 ed 00 c6
RSP: 002b:00007ffc87140140 EFLAGS: 00010246
RAX: 00000000003ffde8 RBX: 0000000000000000 RCX: 0000001b32264000
RDX: 0000001b32224000 RSI: 0000000000400000 RDI: 00007f28506c2710
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc871403d0
 </TASK>
----------------
Code disassembly (best guess):
   0:	28 4d 39             	sub    %cl,0x39(%rbp)
   3:	ca 77 1e             	lret   $0x1e77
   6:	4a c7 44 02 08 06 00 	movq   $0x6,0x8(%rdx,%r8,1)
   d:	00 00
   f:	4a 89 7c 02 10       	mov    %rdi,0x10(%rdx,%r8,1)
  14:	4a 89 74 02 18       	mov    %rsi,0x18(%rdx,%r8,1)
  19:	4a 89 44 02 20       	mov    %rax,0x20(%rdx,%r8,1)
  1e:	48 ff c1             	inc    %rcx
  21:	48 89 0a             	mov    %rcx,(%rdx)
  24:	c3                   	ret
  25:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
* 2a:	48 8b 04 24          	mov    (%rsp),%rax <-- trapping instruction
  2e:	65 48 8b 0d 14 4b 89 	mov    %gs:0x7e894b14(%rip),%rcx        # 0x7e894b4a
  35:	7e
  36:	65 8b 15 15 4b 89 7e 	mov    %gs:0x7e894b15(%rip),%edx        # 0x7e894b52
  3d:	81                   	.byte 0x81
  3e:	e2 00                	loop   0x40