On Mon, Oct 28, 2024 at 08:31:20PM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: Thanks! > > HEAD commit: 4e46774408d9 Merge tag 'for-6.12-rc4-tag' of git://git.ker.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=10fb2ebb980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=fc6f8ce8c5369043 > dashboard link: https://syzkaller.appspot.com/bug?extid=4b5c704012892c4d22fd > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f730e7980000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=177eae40580000 > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-4e467744.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/058a92aaf61a/vmlinux-4e467744.xz > kernel image: https://storage.googleapis.com/syzbot-assets/0b79757fbe5e/bzImage-4e467744.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+4b5c704012892c4d22fd@xxxxxxxxxxxxxxxxxxxxxxxxx > > R10: 000000000401d031 R11: 0000000000000246 R12: 0000000000000004 > R13: 00007f33ed7673fc R14: 00007f33ed737334 R15: 00007f33ed7673e4 > </TASK> > ------------[ cut here ]------------ > kernel BUG at mm/huge_memory.c:2085! > Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI > CPU: 0 UID: 0 PID: 5095 Comm: syz-executor380 Not tainted 6.12.0-rc4-syzkaller-00085-g4e46774408d9 #0 > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > RIP: 0010:zap_huge_pmd+0x953/0xc40 mm/huge_memory.c:2085 > Code: fe ff ff f3 0f 1e fa e8 ab 16 92 ff 48 89 df 4c 89 fe e8 50 ba 08 00 e9 2c f8 ff ff e8 96 16 92 ff 90 0f 0b e8 8e 16 92 ff 90 <0f> 0b e8 86 16 92 ff 4c 89 ef 48 c7 c6 20 65 17 8c e8 37 a2 dd ff > RSP: 0018:ffffc9000aeef1e0 EFLAGS: 00010293 > RAX: ffffffff8202c152 RBX: 000000000000001e RCX: ffff888000b70000 > RDX: 0000000000000000 RSI: 000000000000001f RDI: 000000000000001a > RBP: 000000000000001f R08: ffffffff8202bca6 R09: 1ffff11008416106 > R10: dffffc0000000000 R11: ffffed1008416107 R12: 0000000000000000 > R13: ffffc9000aeef750 R14: 0000000020e00000 R15: fffffffffffffa00 > FS: 000055555711b380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055e22940b470 CR3: 000000003daee000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > zap_pmd_range mm/memory.c:1719 [inline] > zap_pud_range mm/memory.c:1768 [inline] > zap_p4d_range mm/memory.c:1789 [inline] > unmap_page_range+0x762/0x40e0 mm/memory.c:1810 > unmap_vmas+0x3cc/0x5f0 mm/memory.c:1900 > unmap_region+0x214/0x380 mm/vma.c:354 > mmap_region+0x23fa/0x2a30 mm/mmap.c:1583 > do_mmap+0x8f0/0x1000 mm/mmap.c:496 > vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f33ed6f19e9 > Code: 48 83 c4 28 c3 e8 c7 1b 00 00 0f 1f 80 00 00 00 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:00007ffc77c44b78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 > RAX: ffffffffffffffda RBX: 00007ffc77c44be0 RCX: 00007f33ed6f19e9 > RDX: 0000000002000007 RSI: 0000000000c00000 RDI: 0000000020400000 > RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000000 > R10: 000000000401d031 R11: 0000000000000246 R12: 0000000000000004 > R13: 00007f33ed7673fc R14: 00007f33ed737334 R15: 00007f33ed7673e4 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:zap_huge_pmd+0x953/0xc40 mm/huge_memory.c:2085 > Code: fe ff ff f3 0f 1e fa e8 ab 16 92 ff 48 89 df 4c 89 fe e8 50 ba 08 00 e9 2c f8 ff ff e8 96 16 92 ff 90 0f 0b e8 8e 16 92 ff 90 <0f> 0b e8 86 16 92 ff 4c 89 ef 48 c7 c6 20 65 17 8c e8 37 a2 dd ff > RSP: 0018:ffffc9000aeef1e0 EFLAGS: 00010293 > RAX: ffffffff8202c152 RBX: 000000000000001e RCX: ffff888000b70000 > RDX: 0000000000000000 RSI: 000000000000001f RDI: 000000000000001a > RBP: 000000000000001f R08: ffffffff8202bca6 R09: 1ffff11008416106 > R10: dffffc0000000000 R11: ffffed1008416107 R12: 0000000000000000 > R13: ffffc9000aeef750 R14: 0000000020e00000 R15: fffffffffffffa00 > FS: 000055555711b380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000055e22940b470 CR3: 000000003daee000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup This should be resolved with recent changes to rework mmap_region(), let's see... #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ mm-hotfixes-unstable
