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: 3728 Comm: syz-executor.2 Not tainted 5.19.0-rc2-syzkaller-00097-g48a23ec6ff2b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0xd85/0x5660 kernel/locking/lockdep.c:4923 Code: 76 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 51 59 76 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 1e 2d 00 00 48 81 3b 20 54 2b 8f 0f 84 4f f3 ff RSP: 0018:ffffc90002a6f9c0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000018 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000018 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888021145880 R14: 0000000000000000 R15: 0000000000000001 FS: 00007ffbf7c31700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8941b34718 CR3: 000000001e231000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __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+0x7e/0xe0 net/socket.c:1899 __sys_accept4+0xb0/0x100 net/socket.c:1929 __do_sys_accept net/socket.c:1947 [inline] __se_sys_accept net/socket.c:1944 [inline] __x64_sys_accept+0x71/0xb0 net/socket.c:1944 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+0x46/0xb0 RIP: 0033:0x7ffbf6a89109 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffbf7c31168 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 00007ffbf6b9c100 RCX: 00007ffbf6a89109 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00007ffbf6ae305d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff989bfc3f R14: 00007ffbf7c31300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0xd85/0x5660 kernel/locking/lockdep.c:4923 Code: 76 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 51 59 76 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 1e 2d 00 00 48 81 3b 20 54 2b 8f 0f 84 4f f3 ff RSP: 0018:ffffc90002a6f9c0 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000000000000018 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000018 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888021145880 R14: 0000000000000000 R15: 0000000000000001 FS: 00007ffbf7c31700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8941b34718 CR3: 000000001e231000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 76 0e jbe 0x10 2: 41 be 01 00 00 00 mov $0x1,%r14d 8: 0f 86 c8 00 00 00 jbe 0xd6 e: 89 05 51 59 76 0e mov %eax,0xe765951(%rip) # 0xe765965 14: e9 bd 00 00 00 jmpq 0xd6 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 1e 2d 00 00 jne 0x2d52 34: 48 81 3b 20 54 2b 8f cmpq $0xffffffff8f2b5420,(%rbx) 3b: 0f .byte 0xf 3c: 84 4f f3 test %cl,-0xd(%rdi) 3f: ff .byte 0xff