Oops: general protection fault, probably for non-canonical address 0xdffffc000000004b: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000258-0x000000000000025f]
CPU: 1 UID: 0 PID: 6815 Comm: syz.3.22 Not tainted 6.14.0-rc6-syzkaller-g4d872d51bc9d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__lock_acquire+0xe4/0x3c40 kernel/locking/lockdep.c:5091
Code: 08 84 d2 0f 85 15 14 00 00 44 8b 0d 6a 47 cc 0e 45 85 c9 0f 84 b4 0e 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 96 2c 00 00 49 8b 04 24 48 3d a0 f7 82 93 0f 84
RSP: 0018:ffffc90003497488 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000004b RSI: 1ffff92000692ea3 RDI: 0000000000000258
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90628517 R11: 0000000000000000 R12: 0000000000000258
R13: ffff88807ead8000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fa8bd7fe6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000075718000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
 lock_sock_nested+0x3a/0xf0 net/core/sock.c:3662
 lock_sock include/net/sock.h:1624 [inline]
 inet_shutdown+0x67/0x440 net/ipv4/af_inet.c:905
 udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:181
 sctp_udp_sock_stop+0x71/0x160 net/sctp/protocol.c:933
 proc_sctp_do_udp_port+0x261/0x450 net/sctp/sysctl.c:553
 proc_sys_call_handler+0x3c6/0x5a0 fs/proc/proc_sysctl.c:601
 iter_file_splice_write+0x90f/0x10b0 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x18f/0x6c0 fs/splice.c:1164
 splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x178/0x250 fs/splice.c:1233
 do_sendfile+0xafb/0xe40 fs/read_write.c:1363
 __do_sys_sendfile64 fs/read_write.c:1424 [inline]
 __se_sys_sendfile64 fs/read_write.c:1410 [inline]
 __x64_sys_sendfile64+0x1da/0x220 fs/read_write.c:1410
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa8be58d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa8bd7fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fa8be7a6080 RCX: 00007fa8be58d169
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000003
RBP: 00007fa8be60e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa8be7a6080 R15: 00007fff92d71678
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xe4/0x3c40 kernel/locking/lockdep.c:5091
Code: 08 84 d2 0f 85 15 14 00 00 44 8b 0d 6a 47 cc 0e 45 85 c9 0f 84 b4 0e 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 96 2c 00 00 49 8b 04 24 48 3d a0 f7 82 93 0f 84
RSP: 0018:ffffc90003497488 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000004b RSI: 1ffff92000692ea3 RDI: 0000000000000258
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90628517 R11: 0000000000000000 R12: 0000000000000258
R13: ffff88807ead8000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fa8bd7fe6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000075718000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	08 84 d2 0f 85 15 14 	or     %al,0x1415850f(%rdx,%rdx,8)
   7:	00 00                	add    %al,(%rax)
   9:	44 8b 0d 6a 47 cc 0e 	mov    0xecc476a(%rip),%r9d        # 0xecc477a
  10:	45 85 c9             	test   %r9d,%r9d
  13:	0f 84 b4 0e 00 00    	je     0xecd
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 e2             	mov    %r12,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 96 2c 00 00    	jne    0x2cca
  34:	49 8b 04 24          	mov    (%r12),%rax
  38:	48 3d a0 f7 82 93    	cmp    $0xffffffff9382f7a0,%rax
  3e:	0f                   	.byte 0xf
  3f:	84                   	.byte 0x84