general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 1 PID: 10122 Comm: syz-executor.3 Not tainted 6.2.0-rc4-syzkaller-00895-g0313afe8b83a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:__lock_acquire+0xd83/0x56d0 kernel/locking/lockdep.c:4925 Code: 3c 0f 41 bf 01 00 00 00 0f 86 c8 00 00 00 89 05 43 ce 3c 0f e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 4e 31 00 00 49 81 3e e0 75 f7 8f 0f 84 4c f3 ff RSP: 0018:ffffc900151df9e8 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 1ffff92002a3bf6d RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1ce642a R11: 0000000000000000 R12: 0000000000000000 R13: ffff888078999d40 R14: 0000000000000018 R15: 0000000000000000 FS: 00007f8b2b068700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32335000 CR3: 000000001eea2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162 prepare_to_wait+0x47/0x380 kernel/sched/wait.c:269 nr_accept+0x205/0x650 net/netrom/af_netrom.c:793 do_accept+0x380/0x510 net/socket.c:1881 __sys_accept4_file net/socket.c:1922 [inline] __sys_accept4+0x9a/0x120 net/socket.c:1952 __do_sys_accept4 net/socket.c:1963 [inline] __se_sys_accept4 net/socket.c:1960 [inline] __x64_sys_accept4+0x97/0x100 net/socket.c:1960 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f8b2a28c0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8b2b068168 EFLAGS: 00000246 ORIG_RAX: 0000000000000120 RAX: ffffffffffffffda RBX: 00007f8b2a3ac1f0 RCX: 00007f8b2a28c0c9 RDX: 0000000020000100 RSI: 0000000020000440 RDI: 0000000000000004 RBP: 00007f8b2a2e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000800 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcc12154df R14: 00007f8b2b068300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0xd83/0x56d0 kernel/locking/lockdep.c:4925 Code: 3c 0f 41 bf 01 00 00 00 0f 86 c8 00 00 00 89 05 43 ce 3c 0f e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 4e 31 00 00 49 81 3e e0 75 f7 8f 0f 84 4c f3 ff RSP: 0018:ffffc900151df9e8 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 1ffff92002a3bf6d RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1ce642a R11: 0000000000000000 R12: 0000000000000000 R13: ffff888078999d40 R14: 0000000000000018 R15: 0000000000000000 FS: 00007f8b2b068700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32335000 CR3: 000000001eea2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 3c 0f cmp $0xf,%al 2: 41 bf 01 00 00 00 mov $0x1,%r15d 8: 0f 86 c8 00 00 00 jbe 0xd6 e: 89 05 43 ce 3c 0f mov %eax,0xf3cce43(%rip) # 0xf3cce57 14: e9 bd 00 00 00 jmpq 0xd6 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 4c 89 f2 mov %r14,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 4e 31 00 00 jne 0x3182 34: 49 81 3e e0 75 f7 8f cmpq $0xffffffff8ff775e0,(%r14) 3b: 0f .byte 0xf 3c: 84 4c f3 ff test %cl,-0x1(%rbx,%rsi,8)