On Wed, 10 Jul 2024, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 82d01fe6ee52 Add linux-next specific files for 20240709 > git tree: linux-next > console+strace: https://syzkaller.appspot.com/x/log.txt?x=14904441980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=95a20e7acf357998 > dashboard link: https://syzkaller.appspot.com/bug?extid=a2cc273ad0e5a4c15302 > 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=15882a49980000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172aba49980000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/12dcacb06142/disk-82d01fe6.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/6ef954821378/vmlinux-82d01fe6.xz > kernel image: https://storage.googleapis.com/syzbot-assets/9ebf01d42887/bzImage-82d01fe6.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+a2cc273ad0e5a4c15302@xxxxxxxxxxxxxxxxxxxxxxxxx > > list_del corruption, ffffea0001eb8090->next is NULL > ------------[ cut here ]------------ > kernel BUG at lib/list_debug.c:53! > Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI > CPU: 0 UID: 0 PID: 5105 Comm: syz-executor331 Not tainted 6.10.0-rc7-next-20240709-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 > RIP: 0010:__list_del_entry_valid_or_report+0xd0/0x140 lib/list_debug.c:52 > Code: 06 e2 42 fd 48 8b 13 4c 39 fa 75 6b b0 01 5b 41 5c 41 5e 41 5f c3 cc cc cc cc 48 c7 c7 a0 9b 20 8c 4c 89 fe e8 71 e0 d7 06 90 <0f> 0b 48 c7 c7 00 9c 20 8c 4c 89 fe e8 5f e0 d7 06 90 0f 0b 48 c7 > RSP: 0018:ffffc900034df410 EFLAGS: 00010046 > RAX: 0000000000000033 RBX: ffff888140e81000 RCX: f885dda17ff31200 > RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 > RBP: ffffea0001eb8090 R08: ffffffff8173a779 R09: 1ffff9200069be1c > R10: dffffc0000000000 R11: fffff5200069be1d R12: dffffc0000000000 > R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea0001eb8090 > FS: 00007fe27183f6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000200d1a00 CR3: 0000000021fbe000 CR4: 00000000003506f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > __list_del_entry_valid include/linux/list.h:124 [inline] > __list_del_entry include/linux/list.h:215 [inline] > list_del_init include/linux/list.h:287 [inline] > __folio_undo_large_rmappable+0x104/0x230 mm/huge_memory.c:3289 > __folio_migrate_mapping+0x6c1/0x3490 mm/migrate.c:418 > __migrate_folio mm/migrate.c:693 [inline] > migrate_folio+0x111/0x260 mm/migrate.c:720 > move_to_new_folio+0x306/0x12e0 > unmap_and_move_huge_page mm/migrate.c:1444 [inline] > migrate_hugetlbs mm/migrate.c:1563 [inline] > migrate_pages+0xb74/0x3460 mm/migrate.c:1960 > do_mbind mm/mempolicy.c:1388 [inline] > kernel_mbind mm/mempolicy.c:1531 [inline] > __do_sys_mbind mm/mempolicy.c:1605 [inline] > __se_sys_mbind+0x1490/0x19f0 mm/mempolicy.c:1601 > 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: 0033:0x7fe2718a4d39 > 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 b0 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007fe27183f208 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed > RAX: ffffffffffffffda RBX: 00007fe27192f338 RCX: 00007fe2718a4d39 > RDX: 0000000000000000 RSI: 0000000000004000 RDI: 0000000020199000 > RBP: 00007fe27192f330 R08: 0000000000000000 R09: 0000000000000003 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2718fc604 > R13: 00007fe2718fc008 R14: 7277682f7665642f R15: 00000000ffffff1f > </TASK> > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:__list_del_entry_valid_or_report+0xd0/0x140 lib/list_debug.c:52 > Code: 06 e2 42 fd 48 8b 13 4c 39 fa 75 6b b0 01 5b 41 5c 41 5e 41 5f c3 cc cc cc cc 48 c7 c7 a0 9b 20 8c 4c 89 fe e8 71 e0 d7 06 90 <0f> 0b 48 c7 c7 00 9c 20 8c 4c 89 fe e8 5f e0 d7 06 90 0f 0b 48 c7 > RSP: 0018:ffffc900034df410 EFLAGS: 00010046 > RAX: 0000000000000033 RBX: ffff888140e81000 RCX: f885dda17ff31200 > RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 > RBP: ffffea0001eb8090 R08: ffffffff8173a779 R09: 1ffff9200069be1c > R10: dffffc0000000000 R11: fffff5200069be1d R12: dffffc0000000000 > R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea0001eb8090 > FS: 00007fe27183f6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000200d1a00 CR3: 0000000021fbe000 CR4: 00000000003506f0 > 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 #syz fix: mm/hugetlb: fix kernel NULL pointer dereference when migrating hugetlb folio
