On Tue, 04 Jul 2023 02:37:56 -0700 syzbot <syzbot+6cf44e127903fdf9d929@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: f8566aa4f176 Merge tag 'x86-urgent-2023-07-01' of git://gi.. > git tree: upstream > console+strace: https://syzkaller.appspot.com/x/log.txt?x=15ebe50b280000 > kernel config: https://syzkaller.appspot.com/x/.config?x=7406f415f386e786 > dashboard link: https://syzkaller.appspot.com/bug?extid=6cf44e127903fdf9d929 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12e5b04f280000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=102dff80a80000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/08033ccab6ef/disk-f8566aa4.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/04c5c8c7e53a/vmlinux-f8566aa4.xz > kernel image: https://storage.googleapis.com/syzbot-assets/942a1c157a92/bzImage-f8566aa4.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+6cf44e127903fdf9d929@xxxxxxxxxxxxxxxxxxxxxxxxx > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 5001 at mm/gup.c:1173 __get_user_pages+0xd49/0x1080 mm/gup.c:1173 Thanks. This is the temporary warning which was added by Linus's a425ac5365f6cb3cc4 ("gup: add warning if some caller would seem to want stack expansion"). > Modules linked in: > CPU: 1 PID: 5001 Comm: syz-executor229 Not tainted 6.4.0-syzkaller-10062-gf8566aa4f176 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 > RIP: 0010:__get_user_pages+0xd49/0x1080 mm/gup.c:1173 > Code: 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 bc 02 00 00 48 8b 44 24 20 48 8b 80 c0 00 00 00 48 8d 1c e8 e9 ad f7 ff ff e8 37 19 c3 ff <0f> 0b e9 32 f6 ff ff e8 2b 19 c3 ff 0f 0b e8 24 19 c3 ff 44 89 ed > RSP: 0018:ffffc90003a3f558 EFLAGS: 00010293 > RAX: 0000000000000000 RBX: 0000000000000100 RCX: 0000000000000000 > RDX: ffff888020630000 RSI: ffffffff81c1b599 RDI: 0000000000000007 > RBP: 0000000020006000 R08: 0000000000000007 R09: 0000000000000000 > R10: 0000000000000100 R11: 0000000000000001 R12: ffff888018796100 > R13: 0000000000210002 R14: ffff888076f55580 R15: 0000000000000000 > FS: 0000555556272300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000664740 CR3: 0000000029be1000 CR4: 00000000003506e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > __get_user_pages_locked mm/gup.c:1456 [inline] > __gup_longterm_locked+0x6f9/0x23e0 mm/gup.c:2150 > internal_get_user_pages_fast+0x16e6/0x32f0 mm/gup.c:3148 > get_user_pages_fast+0xa8/0xf0 mm/gup.c:3226 > __iov_iter_get_pages_alloc+0x28c/0x1950 lib/iov_iter.c:1111 > iov_iter_get_pages2+0xa8/0x100 lib/iov_iter.c:1151 > iter_to_pipe fs/splice.c:1402 [inline] > vmsplice_to_pipe fs/splice.c:1492 [inline] > __do_sys_vmsplice+0x50c/0xaa0 fs/splice.c:1556 > 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: 0033:0x7f2a6e4e4b69 > Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007ffdb0cc72d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000116 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2a6e4e4b69 > RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000004 > RBP: 00007f2a6e4a8d10 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000246 R12: 00007f2a6e4a8da0 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > </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. > > If the bug is already fixed, 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 change bug's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the bug is a duplicate of another bug, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup
