Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 6142 Comm: syz-executor263 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:anon_vma_lock_read mm/internal.h:315 [inline] RIP: 0010:validate_mm+0x3d4/0x780 mm/vma.c:707 Code: d2 e0 98 ff 48 89 df e8 5a 10 f1 ff c6 05 db a8 dd 0f 01 90 0f 0b 90 e9 04 fd ff ff e8 b5 e0 98 ff 48 8b 44 24 08 48 c1 e8 03 <80> 3c 28 00 0f 85 25 03 00 00 48 8b 44 24 08 4c 8d 63 30 48 8b 00 RSP: 0018:ffffc900040d7870 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88806b186000 RCX: 0000000000000000 RDX: ffff888000794b00 RSI: ffffffff8274c56b RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffff88806b186083 R11: 0000000000000001 R12: ffff88806b186010 R13: ffff88806b186040 R14: 0000000000000001 R15: 000000000000003d FS: 0000000000000000(0000) GS:ffff888095281000(0063) knlGS:000000005727b3c0 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7f72000 CR3: 000000004e463000 CR4: 0000000000352ef0 Call Trace: vms_complete_munmap_vmas+0x83b/0xdf0 mm/vma.c:1437 do_vmi_align_munmap+0x44f/0x5f0 mm/vma.c:1677 do_vmi_munmap+0x1f8/0x410 mm/vma.c:1725 __vm_munmap+0x196/0x3c0 mm/vma.c:3562 __do_sys_munmap mm/mmap.c:1094 [inline] __se_sys_munmap mm/mmap.c:1091 [inline] __ia32_sys_munmap+0x57/0x80 mm/mmap.c:1091 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x14b/0x8c0 arch/x86/entry/syscall_32.c:282 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:307 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7eaafbc Code: d2 74 05 c1 e8 0c 89 02 8b 5d fc 31 c0 c9 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 58 b8 RSP: 002b:00000000ff8ab10c EFLAGS: 00000296 ORIG_RAX: 000000000000005b RAX: ffffffffffffffda RBX: 0000000020088000 RCX: 0000000000001000 RDX: 00000000f7f70ff4 RSI: 00000000000000fb RDI: 0000000000000040 RBP: 00000000ff8ab168 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:anon_vma_lock_read mm/internal.h:315 [inline] RIP: 0010:validate_mm+0x3d4/0x780 mm/vma.c:707 Code: d2 e0 98 ff 48 89 df e8 5a 10 f1 ff c6 05 db a8 dd 0f 01 90 0f 0b 90 e9 04 fd ff ff e8 b5 e0 98 ff 48 8b 44 24 08 48 c1 e8 03 <80> 3c 28 00 0f 85 25 03 00 00 48 8b 44 24 08 4c 8d 63 30 48 8b 00 RSP: 0018:ffffc900040d7870 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88806b186000 RCX: 0000000000000000 RDX: ffff888000794b00 RSI: ffffffff8274c56b RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffff88806b186083 R11: 0000000000000001 R12: ffff88806b186010 R13: ffff88806b186040 R14: 0000000000000001 R15: 000000000000003d FS: 0000000000000000(0000) GS:ffff888095281000(0063) knlGS:000000005727b3c0 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7f72000 CR3: 000000004e463000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 48 89 df mov %rbx,%rdi 3: e8 5a 10 f1 ff call 0xfff11062 8: c6 05 db a8 dd 0f 01 movb $0x1,0xfdda8db(%rip) # 0xfdda8ea f: 90 nop 10: 0f 0b ud2 12: 90 nop 13: e9 04 fd ff ff jmp 0xfffffd1c 18: e8 b5 e0 98 ff call 0xff98e0d2 1d: 48 8b 44 24 08 mov 0x8(%rsp),%rax 22: 48 c1 e8 03 shr $0x3,%rax * 26: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2a: 0f 85 25 03 00 00 jne 0x355 30: 48 8b 44 24 08 mov 0x8(%rsp),%rax 35: 4c 8d 63 30 lea 0x30(%rbx),%r12 39: 48 8b 00 mov (%rax),%rax