def_flags: 0x0() ------------[ cut here ]------------ kernel BUG at mm/mmap.c:340! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 6567 Comm: syz-executor.2 Not tainted 6.4.0-syzkaller-10098-g995b406c7e97 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:validate_mm+0x3a0/0x470 mm/mmap.c:340 Code: 24 48 e8 93 39 fb ff e9 fc fd ff ff e8 09 e1 be ff 44 89 fa 89 ee 48 c7 c7 a0 d3 78 8a e8 88 89 a2 ff 48 89 df e8 a0 17 fb ff <0f> 0b e8 e9 e0 be ff 48 8b 7c 24 18 e8 8f 17 fb ff c6 05 f4 f8 cd RSP: 0018:ffffc9000e7ffa80 EFLAGS: 00010286 RAX: 00000000000002ff RBX: ffff888025ea0980 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8169097c RDI: 0000000000000005 RBP: 000000000000001e R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff88800c54f060 R13: ffff888000dc3dc0 R14: 00000000ffe0cfff R15: 000000000000001c FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7f53b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f72b6ad8 CR3: 0000000051097000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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: 0023:0xf7f58579 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:00000000f7f533dc EFLAGS: 00000292 ORIG_RAX: 000000000000005b RAX: ffffffffffffffda RBX: 00000000ed9ff000 RCX: 000000000005f800 RDX: 00000000f734e000 RSI: 0000000000000003 RDI: 00000000ed9ff000 RBP: 00000000f7f53480 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:validate_mm+0x3a0/0x470 mm/mmap.c:340 Code: 24 48 e8 93 39 fb ff e9 fc fd ff ff e8 09 e1 be ff 44 89 fa 89 ee 48 c7 c7 a0 d3 78 8a e8 88 89 a2 ff 48 89 df e8 a0 17 fb ff <0f> 0b e8 e9 e0 be ff 48 8b 7c 24 18 e8 8f 17 fb ff c6 05 f4 f8 cd RSP: 0018:ffffc9000e7ffa80 EFLAGS: 00010286 RAX: 00000000000002ff RBX: ffff888025ea0980 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8169097c RDI: 0000000000000005 RBP: 000000000000001e R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff88800c54f060 R13: ffff888000dc3dc0 R14: 00000000ffe0cfff R15: 000000000000001c FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7f53b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f72b6ad8 CR3: 0000000051097000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi