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: 5199 Comm: syz-executor.0 Not tainted 6.2.0-rc1-next-20221226-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__lock_acquire+0xd83/0x56d0 kernel/locking/lockdep.c:4925 Code: 3d 0f 41 bf 01 00 00 00 0f 86 c8 00 00 00 89 05 23 62 3d 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 c5 f7 8f 0f 84 4c f3 ff RSP: 0018:ffffc9000436fa00 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 1ffff9200086df6e RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1ce6682 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88802081d7c0 R14: 0000000000000018 R15: 0000000000000000 FS: 00007f092b53c700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f979cad92f8 CR3: 000000001d0d4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire.part.0+0x11a/0x350 kernel/locking/lockdep.c:5668 __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:1856 __sys_accept4_file net/socket.c:1897 [inline] __sys_accept4+0x9a/0x120 net/socket.c:1927 __do_sys_accept net/socket.c:1944 [inline] __se_sys_accept net/socket.c:1941 [inline] __x64_sys_accept+0x75/0xb0 net/socket.c:1941 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: 0033:0x7f092a88c0a9 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:00007f092b53c168 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 00007f092a9ac120 RCX: 00007f092a88c0a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f092a8e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8a35d03f R14: 00007f092b53c300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0xd83/0x56d0 kernel/locking/lockdep.c:4925 Code: 3d 0f 41 bf 01 00 00 00 0f 86 c8 00 00 00 89 05 23 62 3d 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 c5 f7 8f 0f 84 4c f3 ff RSP: 0018:ffffc9000436fa00 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 1ffff9200086df6e RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1ce6682 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88802081d7c0 R14: 0000000000000018 R15: 0000000000000000 FS: 00007f092b53c700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f979cad92f8 CR3: 000000001d0d4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 0f 41 bf 01 00 00 00 cmovno 0x1(%rdi),%edi 7: 0f 86 c8 00 00 00 jbe 0xd5 d: 89 05 23 62 3d 0f mov %eax,0xf3d6223(%rip) # 0xf3d6236 13: e9 bd 00 00 00 jmpq 0xd5 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 4c 89 f2 mov %r14,%rdx 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 0f 85 4e 31 00 00 jne 0x3181 33: 49 81 3e e0 c5 f7 8f cmpq $0xffffffff8ff7c5e0,(%r14) 3a: 0f .byte 0xf 3b: 84 4c f3 ff test %cl,-0x1(%rbx,%rsi,8)