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: 3721 Comm: syz-executor.4 Not tainted 6.0.0-rc6-syzkaller-00104-g521a547ced64 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 RIP: 0010:__lock_acquire+0xd83/0x56d0 kernel/locking/lockdep.c:4923 Code: 9b 0e 41 bf 01 00 00 00 0f 86 c8 00 00 00 89 05 23 a6 9b 0e 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 60 c4 51 8f 0f 84 4c f3 ff RSP: 0018:ffffc9000480f9f8 EFLAGS: 00010016 RAX: dffffc0000000000 RBX: 1ffff92000901f6e RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1bbdbe2 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801e1a9d80 R14: 0000000000000018 R15: 0000000000000000 FS: 00007fc30586f700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000049bdc0 CR3: 000000007a2a2000 CR4: 0000000000350ee0 Call Trace: lock_acquire kernel/locking/lockdep.c:5666 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 prepare_to_wait+0x43/0x370 kernel/sched/wait.c:265 nr_accept+0x201/0x640 net/netrom/af_netrom.c:793 do_accept+0x37c/0x510 net/socket.c:1856 __sys_accept4_file net/socket.c:1897 [inline] __sys_accept4+0x96/0x120 net/socket.c:1927 __do_sys_accept net/socket.c:1944 [inline] __se_sys_accept net/socket.c:1941 [inline] __x64_sys_accept+0x71/0xb0 net/socket.c:1941 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x45f789 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc30586f198 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 000000000052bfa0 RCX: 000000000045f789 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000004a8a0f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000003 R14: 00000000004a927f R15: 00007fc30586f6bc Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0xd83/0x56d0 kernel/locking/lockdep.c:4923 Code: 9b 0e 41 bf 01 00 00 00 0f 86 c8 00 00 00 89 05 23 a6 9b 0e 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 60 c4 51 8f 0f 84 4c f3 ff RSP: 0018:ffffc9000480f9f8 EFLAGS: 00010016 RAX: dffffc0000000000 RBX: 1ffff92000901f6e RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1bbdbe2 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801e1a9d80 R14: 0000000000000018 R15: 0000000000000000 FS: 00007fc30586f700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000049bdc0 CR3: 000000007a2a2000 CR4: 0000000000350ee0 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 41 bf 01 00 00 00 mov $0x1,%r15d 6: 0f 86 c8 00 00 00 jbe 0xd4 c: 89 05 23 a6 9b 0e mov %eax,0xe9ba623(%rip) # 0xe9ba635 12: e9 bd 00 00 00 jmpq 0xd4 17: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1e: fc ff df 21: 4c 89 f2 mov %r14,%rdx 24: 48 c1 ea 03 shr $0x3,%rdx * 28: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2c: 0f 85 4e 31 00 00 jne 0x3180 32: 49 81 3e 60 c4 51 8f cmpq $0xffffffff8f51c460,(%r14) 39: 0f .byte 0xf 3a: 84 4c f3 ff test %cl,-0x1(%rbx,%rsi,8)