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Thu, 23 Mar 2023 22:27:35 -0700 (PDT) Date: Thu, 23 Mar 2023 22:27:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009c5ff405f79ea630@google.com> Subject: [syzbot] [mm?] general protection fault in vma_merge From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: f4q77itbptad3mpk1n8at3zzeutpkhoa X-Rspam-User: X-Rspamd-Queue-Id: 966B4180004 X-Rspamd-Server: rspam06 X-HE-Tag: 1679635656-242227 X-HE-Meta: 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 jQUMZmAs 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 ZRb8wkPU Z8TGZIfr4pQIQux6LZXzypSlIpuINeuTOrQ8HBmimctkDaQBTYAmB1TvKtuHs+0WUYk0OAp/I0YoIKFDOsYhZmiUUCLeVYTYDzxIbVWK6h1Q0y3vUOpzdxuVvLbvrRcRgqDt9XWu73Wi1SLHsMi8iKADXT6UxF3Tc8iiiQlSwIyECZWzGmsYnuhO5o6qwYZ+Oz6Ydc45EV8/q5SHvP3gjAHVvt215XXd7Ze0VtT1SvXZBOoAQ9+erqAfPw6TsbZhQAYZyV7RwZBxpqfE/h/H8IZ4KaHOmDG+p0CiG7DDlZOQLGpkFlnhWbzzMrvkYH0BR9j6drRcWwKwpnGdDZaCMbdCLGy6iUvxHTV+nskt/gzUpALlhcpDt2Qlv+QmrrdO X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot found the following issue on: HEAD commit: 7c4a254d78f8 Add linux-next specific files for 20230323 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15230839c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=8ba12b2f4a1ff93d dashboard link: https://syzkaller.appspot.com/bug?extid=29fe1bbf3a023691de49 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c322f39e779d/disk-7c4a254d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bc7ef0a3d51c/vmlinux-7c4a254d.xz kernel image: https://storage.googleapis.com/syzbot-assets/d3f17e539876/bzImage-7c4a254d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+29fe1bbf3a023691de49@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000015: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af] CPU: 0 PID: 5796 Comm: modprobe Not tainted 6.3.0-rc3-next-20230323-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:vma_merge+0x234/0x1fd0 mm/mmap.c:952 Code: 08 00 0f 84 b0 03 00 00 e8 e9 54 bf ff 48 8b 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 48 8b b0 a8 00 00 00 RSP: 0018:ffffc9000c24fac8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88801cbb2100 RCX: 0000000000000000 RDX: 0000000000000015 RSI: ffffffff81c37957 RDI: 00000000000000a9 RBP: ffff888027fee400 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 00007faf14caa000 R15: ffff88801d2b3400 FS: 00007faf14ca4800(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faf14dd3920 CR3: 0000000078d00000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mprotect_fixup+0x353/0xbd0 mm/mprotect.c:676 do_mprotect_pkey+0x878/0xd20 mm/mprotect.c:862 __do_sys_mprotect mm/mprotect.c:883 [inline] __se_sys_mprotect mm/mprotect.c:880 [inline] __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:880 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7faf14fef297 Code: 44 00 00 b8 0b 00 00 00 0f 05 48 3d 01 f0 ff ff 73 01 c3 48 8d 0d 21 1f 01 00 f7 d8 89 01 48 83 c8 ff c3 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 01 1f 01 00 f7 d8 89 01 48 83 RSP: 002b:00007ffda9278dc8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007faf14cac000 RCX: 00007faf14fef297 RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007faf14caa000 RBP: 00007ffda9278ee0 R08: 000000000000ffff R09: 00007faf14dd2d00 R10: 00007faf14caaeb8 R11: 0000000000000206 R12: 00007faf14cac000 R13: 0000000000000007 R14: 0000001700000007 R15: 00007faf14ca75f8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:vma_merge+0x234/0x1fd0 mm/mmap.c:952 Code: 08 00 0f 84 b0 03 00 00 e8 e9 54 bf ff 48 8b 44 24 08 48 8d b8 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4d 18 00 00 48 8b 44 24 08 48 8b b0 a8 00 00 00 RSP: 0018:ffffc9000c24fac8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff88801cbb2100 RCX: 0000000000000000 RDX: 0000000000000015 RSI: ffffffff81c37957 RDI: 00000000000000a9 RBP: ffff888027fee400 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 00007faf14caa000 R15: ffff88801d2b3400 FS: 00007faf14ca4800(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020004000 CR3: 0000000078d00000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 0f 84 b0 03 00 00 je 0x3b8 8: e8 e9 54 bf ff callq 0xffbf54f6 d: 48 8b 44 24 08 mov 0x8(%rsp),%rax 12: 48 8d b8 a8 00 00 00 lea 0xa8(%rax),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 4d 18 00 00 jne 0x1881 34: 48 8b 44 24 08 mov 0x8(%rsp),%rax 39: 48 8b b0 a8 00 00 00 mov 0xa8(%rax),%rsi --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.