On 23.09.24 14:18, syzbot wrote:
Hello, syzbot found the following issue on: HEAD commit: 88264981f208 Merge tag 'sched_ext-for-6.12' of git://git.k.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=16c36c27980000 kernel config: https://syzkaller.appspot.com/x/.config?x=e851828834875d6f dashboard link: https://syzkaller.appspot.com/bug?extid=bf2c35fa302ebe3c7471 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=12773080580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ed5e9f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0e011ac37c93/disk-88264981.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f5c65577e19e/vmlinux-88264981.xz kernel image: https://storage.googleapis.com/syzbot-assets/984d963c8ea1/bzImage-88264981.xz The issue was bisected to: commit 75182022a0439788415b2dd1db3086e07aa506f7 Author: Peter Xu <peterx@xxxxxxxxxx> Date: Mon Aug 26 20:43:51 2024 +0000 mm/x86: support large pfn mappings bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17df9c27980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=143f9c27980000 console output: https://syzkaller.appspot.com/x/log.txt?x=103f9c27980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bf2c35fa302ebe3c7471@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 75182022a043 ("mm/x86: support large pfn mappings") ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5508 at mm/huge_memory.c:1602 copy_huge_pmd+0x102c/0x1c60 mm/huge_memory.c:1602 Modules linked in: CPU: 1 UID: 0 PID: 5508 Comm: syz-executor274 Not tainted 6.11.0-syzkaller-08481-g88264981f208 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:copy_huge_pmd+0x102c/0x1c60 mm/huge_memory.c:1602 Code: ff 90 0f 0b 90 e9 2e f5 ff ff e8 8f fc 92 ff 48 ff cb e9 0f f7 ff ff e8 82 fc 92 ff 48 ff cb e9 8a f7 ff ff e8 75 fc 92 ff 90 <0f> 0b 90 e9 11 fd ff ff 4c 8d ac 24 00 01 00 00 48 b8 06 fe ff ff RSP: 0018:ffffc90003cdf0c0 EFLAGS: 00010293 RAX: ffffffff8201bd3b RBX: ffff88803090c118 RCX: ffff8880317a9e00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90003cdf248 R08: ffffffff8201bc06 R09: 1ffffffff2038ef5 R10: dffffc0000000000 R11: fffffbfff2038ef6 R12: ffff88802fab89c0 R13: d7ffe7fff1cbfe02 R14: 0000000000000020 R15: ffff888031e5b780 FS: 00007f38182a06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f381831d9f0 CR3: 000000007b18c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> copy_pmd_range+0x425/0x85f0 mm/memory.c:1245 copy_pud_range mm/memory.c:1292 [inline] copy_p4d_range mm/memory.c:1316 [inline] copy_page_range+0x99f/0xe90 mm/memory.c:1414 dup_mmap kernel/fork.c:750 [inline] dup_mm kernel/fork.c:1674 [inline] copy_mm+0x11fb/0x1f40 kernel/fork.c:1723 copy_process+0x1845/0x3d50 kernel/fork.c:2375 kernel_clone+0x226/0x8f0 kernel/fork.c:2787 __do_sys_clone3 kernel/fork.c:3091 [inline] __se_sys_clone3+0x2cb/0x350 kernel/fork.c:3070 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: 0033:0x7f3818306429 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f38182a0118 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f3818390318 RCX: 00007f3818306429 RDX: 00007f38182e2ab6 RSI: 0000000000000058 RDI: 00007f38182a0120 RBP: 00007f3818390310 R08: 00007fffb191b837 R09: 0000000000000080 R10: 0000000000000000 R11: 0000000000000202 R12: 00007f381835d074 R13: 00007f381839031c R14: 00007f38182a0120 R15: 000000080000000e </TASK> --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
#syz test: https://github.com/davidhildenbrand/linux.git copy_huge_pmd_pfn -- Cheers, David / dhildenb
