On Thu, Apr 27, 2023 at 8:20 AM syzbot <syzbot+1b2ce6d050776f4403cf@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: d3e1ee0e67e7 Add linux-next specific files for 20230421 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=110654a4280000 > kernel config: https://syzkaller.appspot.com/x/.config?x=53c789efbcc06cf6 > dashboard link: https://syzkaller.appspot.com/bug?extid=1b2ce6d050776f4403cf > 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/c558a9e1fe6a/disk-d3e1ee0e.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/2ec100a34c4c/vmlinux-d3e1ee0e.xz > kernel image: https://storage.googleapis.com/syzbot-assets/1afcd9936dc1/bzImage-d3e1ee0e.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+1b2ce6d050776f4403cf@xxxxxxxxxxxxxxxxxxxxxxxxx It looks like next-20230421 doesn't have Hugh's fix: https://lore.kernel.org/linux-mm/b6c881-c352-bb91-85a8-febeb09dfd71@xxxxxxxxxx/ Although I'm not sure whether this is the same problem or not, it doesn't hurt to retest with this fix. next-20230427 already included this fix. > > faultin_page mm/gup.c:925 [inline] > __get_user_pages+0x614/0x10e0 mm/gup.c:1147 > populate_vma_page_range+0x2df/0x420 mm/gup.c:1543 > __mm_populate+0x105/0x3b0 mm/gup.c:1652 > mm_populate include/linux/mm.h:3191 [inline] > vm_mmap_pgoff+0x2c6/0x3b0 mm/util.c:548 > ksys_mmap_pgoff+0x7d/0x5a0 mm/mmap.c:1440 > 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 > ------------[ cut here ]------------ > kernel BUG at mm/filemap.c:1529! > invalid opcode: 0000 [#1] PREEMPT SMP KASAN > CPU: 0 PID: 7377 Comm: syz-executor.1 Not tainted 6.3.0-rc7-next-20230421-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 > RIP: 0010:folio_unlock+0xb2/0xd0 mm/filemap.c:1529 > Code: e8 63 4b d4 ff 48 89 ef 31 f6 e8 f9 fc ff ff 5b 5d e9 52 4b d4 ff e8 4d 4b d4 ff 48 c7 c6 c0 a7 56 8a 48 89 ef e8 ee e0 0f 00 <0f> 0b 48 89 df e8 74 2a 27 00 e9 7c ff ff ff 66 66 2e 0f 1f 84 00 > RSP: 0018:ffffc9001531f7a8 EFLAGS: 00010293 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: ffff88803c570000 RSI: ffffffff81af9a12 RDI: 0000000000000000 > RBP: ffffea0002128000 R08: 0000000000000001 R09: ffffffff8e796e17 > R10: fffffbfff1cf2dc2 R11: 0000000000000000 R12: ffffc9001531f8d8 > R13: ffffc9001531f8d0 R14: ffffc9001531f8d8 R15: 000000000000001e > FS: 00007fe54afbc700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007eff0bb831b8 CR3: 0000000023ba2000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > collapse_file+0x1f6d/0x5db0 mm/khugepaged.c:2316 > hpage_collapse_scan_file+0xbef/0x1550 mm/khugepaged.c:2415 > madvise_collapse+0x53b/0xca0 mm/khugepaged.c:2877 > madvise_vma_behavior+0x649/0x20a0 mm/madvise.c:1074 > madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1248 > do_madvise.part.0+0x287/0x5e0 mm/madvise.c:1428 > do_madvise mm/madvise.c:1441 [inline] > __do_sys_madvise mm/madvise.c:1441 [inline] > __se_sys_madvise mm/madvise.c:1439 [inline] > __x64_sys_madvise+0x117/0x150 mm/madvise.c:1439 > 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: 0033:0x7fe54c48c169 > Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007fe54afbc168 EFLAGS: 00000246 ORIG_RAX: 000000000000001c > RAX: ffffffffffffffda RBX: 00007fe54c5ac120 RCX: 00007fe54c48c169 > RDX: 0000000000000019 RSI: 000000000060005f RDI: 0000000020000000 > RBP: 00007fe54c4e7ca1 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007fff8070a1ff R14: 00007fe54afbc300 R15: 0000000000022000 > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:folio_unlock+0xb2/0xd0 mm/filemap.c:1529 > Code: e8 63 4b d4 ff 48 89 ef 31 f6 e8 f9 fc ff ff 5b 5d e9 52 4b d4 ff e8 4d 4b d4 ff 48 c7 c6 c0 a7 56 8a 48 89 ef e8 ee e0 0f 00 <0f> 0b 48 89 df e8 74 2a 27 00 e9 7c ff ff ff 66 66 2e 0f 1f 84 00 > RSP: 0018:ffffc9001531f7a8 EFLAGS: 00010293 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: ffff88803c570000 RSI: ffffffff81af9a12 RDI: 0000000000000000 > RBP: ffffea0002128000 R08: 0000000000000001 R09: ffffffff8e796e17 > R10: fffffbfff1cf2dc2 R11: 0000000000000000 R12: ffffc9001531f8d8 > R13: ffffc9001531f8d0 R14: ffffc9001531f8d8 R15: 000000000000001e > FS: 00007fe54afbc700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fd2aa586058 CR3: 0000000023ba2000 CR4: 00000000003506e0 > 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 bug is already fixed, let syzbot know by replying with: > #syz fix: exact-commit-title > > 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 you want to unassign a label, reply with: > #syz unset some-label > > 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 >
