general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 4550 Comm: syz-executor.4 Not tainted 6.4.0-syzkaller-10098-g995b406c7e97 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:mas_validate_gaps lib/maple_tree.c:7002 [inline] RIP: 0010:mt_validate+0x32ac/0x4370 lib/maple_tree.c:7224 Code: 89 ee e8 97 a8 76 f7 49 83 fd 06 0f 84 a6 06 00 00 e8 48 ac 76 f7 49 01 de 48 ba 00 00 00 00 00 fc ff df 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 0f 85 4b 10 00 00 4d 8b 2e 4c 89 ff 4c 89 ee e8 dc a7 RSP: 0018:ffffc9001070f920 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90005bd9000 RDX: dffffc0000000000 RSI: ffffffff8a0e2288 RDI: 0000000000000007 RBP: ffff88802c473c00 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88802c473c00 R14: 0000000000000000 R15: ffffffff00694000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0063) knlGS:00000000f7f1fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f72a328e CR3: 0000000034895000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: validate_mm+0x9d/0x470 mm/mmap.c:300 do_vmi_align_munmap+0x1199/0x1680 mm/mmap.c:2561 do_vmi_munmap+0x266/0x430 mm/mmap.c:2619 __vm_munmap+0x137/0x380 mm/mmap.c:2899 __do_sys_munmap mm/mmap.c:2916 [inline] __se_sys_munmap mm/mmap.c:2913 [inline] __ia32_sys_munmap+0x60/0x80 mm/mmap.c:2913 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f24579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f1f5cc EFLAGS: 00000296 ORIG_RAX: 000000000000005b RAX: ffffffffffffffda RBX: 0000000020ffb000 RCX: 0000000000004000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mas_validate_gaps lib/maple_tree.c:7002 [inline] RIP: 0010:mt_validate+0x32ac/0x4370 lib/maple_tree.c:7224 Code: 89 ee e8 97 a8 76 f7 49 83 fd 06 0f 84 a6 06 00 00 e8 48 ac 76 f7 49 01 de 48 ba 00 00 00 00 00 fc ff df 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 0f 85 4b 10 00 00 4d 8b 2e 4c 89 ff 4c 89 ee e8 dc a7 RSP: 0018:ffffc9001070f920 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90005bd9000 RDX: dffffc0000000000 RSI: ffffffff8a0e2288 RDI: 0000000000000007 RBP: ffff88802c473c00 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88802c473c00 R14: 0000000000000000 R15: ffffffff00694000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0063) knlGS:00000000f7f1fb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020cf8000 CR3: 0000000034895000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 ee mov %ebp,%esi 2: e8 97 a8 76 f7 callq 0xf776a89e 7: 49 83 fd 06 cmp $0x6,%r13 b: 0f 84 a6 06 00 00 je 0x6b7 11: e8 48 ac 76 f7 callq 0xf776ac5e 16: 49 01 de add %rbx,%r14 19: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 20: fc ff df 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 0f 85 4b 10 00 00 jne 0x107f 34: 4d 8b 2e mov (%r14),%r13 37: 4c 89 ff mov %r15,%rdi 3a: 4c 89 ee mov %r13,%rsi 3d: e8 .byte 0xe8 3e: dc .byte 0xdc 3f: a7 cmpsl %es:(%rdi),%ds:(%rsi)