lkml.org 
[lkml]   [2023]   [Oct]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: [syzbot] [mm?] WARNING in copy_hugetlb_page_range
    From
    syzbot has found a reproducer for the following issue on:

    HEAD commit: c9f2baaa18b5 Add linux-next specific files for 20231003
    git tree: linux-next
    console+strace: https://syzkaller.appspot.com/x/log.txt?x=154df992680000
    kernel config: https://syzkaller.appspot.com/x/.config?x=3fe9c462fee1649f
    dashboard link: https://syzkaller.appspot.com/bug?extid=ec78016e3d67860eec28
    compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
    syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11e4b011680000
    C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11772062680000

    Downloadable assets:
    disk image: https://storage.googleapis.com/syzbot-assets/5361e41384fe/disk-c9f2baaa.raw.xz
    vmlinux: https://storage.googleapis.com/syzbot-assets/7028b209124d/vmlinux-c9f2baaa.xz
    kernel image: https://storage.googleapis.com/syzbot-assets/a167dc667ee5/bzImage-c9f2baaa.xz

    IMPORTANT: if you fix the issue, please add the following tag to the commit:
    Reported-by: syzbot+ec78016e3d67860eec28@syzkaller.appspotmail.com

    ------------[ cut here ]------------
    WARNING: CPU: 0 PID: 5054 at include/linux/hugetlb.h:1289 hugetlb_walk include/linux/hugetlb.h:1289 [inline]
    WARNING: CPU: 0 PID: 5054 at include/linux/hugetlb.h:1289 copy_hugetlb_page_range+0x675/0x3520 mm/hugetlb.c:4940
    Modules linked in:
    CPU: 0 PID: 5054 Comm: syz-executor329 Not tainted 6.6.0-rc4-next-20231003-syzkaller #0
    Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
    RIP: 0010:hugetlb_walk include/linux/hugetlb.h:1289 [inline]
    RIP: 0010:copy_hugetlb_page_range+0x675/0x3520 mm/hugetlb.c:4940
    Code: 00 be ff ff ff ff 48 81 c7 a0 01 00 00 e8 b3 2f 6c 08 31 ff 89 c5 89 c6 e8 68 77 ae ff 85 ed 0f 85 dd fd ff ff e8 eb 7b ae ff <0f> 0b e9 d1 fd ff ff e8 df 7b ae ff 49 89 ec 31 ff 41 81 e4 ff 0f
    RSP: 0018:ffffc90003a2f4a0 EFLAGS: 00010293
    RAX: 0000000000000000 RBX: 0000000020000000 RCX: ffffffff81d9dcf8
    RDX: ffff8880675d0000 RSI: ffffffff81d9dd05 RDI: 0000000000000005
    RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
    R10: 0000000000000000 R11: ffffffff910df9a8 R12: ffff88807905b900
    R13: ffff88801efab500 R14: 0000000020000000 R15: dffffc0000000000
    FS: 0000555557543380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 00007fcd71918140 CR3: 000000007b828000 CR4: 00000000003506f0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
    <TASK>
    copy_page_range+0x1dc2/0x3c70 mm/memory.c:1293
    dup_mmap+0x13f3/0x1d80 kernel/fork.c:758
    dup_mm kernel/fork.c:1684 [inline]
    copy_mm kernel/fork.c:1733 [inline]
    copy_process+0x6cc9/0x74b0 kernel/fork.c:2495
    kernel_clone+0xfd/0x920 kernel/fork.c:2900
    __do_sys_clone3+0x1f1/0x260 kernel/fork.c:3201
    do_syscall_x64 arch/x86/entry/common.c:51 [inline]
    do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81
    entry_SYSCALL_64_after_hwframe+0x63/0xcd
    RIP: 0033:0x7fcd71930ab9
    Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 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 b8 ff ff ff f7 d8 64 89 01 48
    RSP: 002b:00007ffc79f4f9b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
    RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcd71930ab9
    RDX: 00007ffc79f4f9c0 RSI: 0000000000000058 RDI: 00007ffc79f4f9c0
    RBP: 00007fcd719a35f0 R08: 0000000000000000 R09: 0000000000000000
    R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001
    R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
    </TASK>


    ---
    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.

    \
     
     \ /
      Last update: 2023-10-03 19:24    [W:4.112 / U:0.292 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site