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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 6e64f4580381 Merge tag 'input-for-v6.17-rc0' of git://git... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10850ea2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5f2996d42fef6c09 dashboard link: https://syzkaller.appspot.com/bug?extid=7f04e5b3fea8b6c33d39 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10ec9042580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14850ea2580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5166c0e1d4f0/disk-6e64f458.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0d6654192cf8/vmlinux-6e64f458.xz kernel image: https://storage.googleapis.com/syzbot-assets/239aaa681481/bzImage-6e64f458.xz The issue was bisected to: commit 087f997870a948820ec366701d178f402c6a23a3 Author: Pavel Begunkov Date: Fri Nov 29 13:34:32 2024 +0000 io_uring/memmap: implement mmap for regions bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=157afea2580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=177afea2580000 console output: https://syzkaller.appspot.com/x/log.txt?x=137afea2580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7f04e5b3fea8b6c33d39@syzkaller.appspotmail.com Fixes: 087f997870a9 ("io_uring/memmap: implement mmap for regions") ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5851 at mm/vmalloc.c:542 vmap_pages_pte_range mm/vmalloc.c:542 [inline] WARNING: CPU: 1 PID: 5851 at mm/vmalloc.c:542 vmap_pages_pmd_range mm/vmalloc.c:569 [inline] WARNING: CPU: 1 PID: 5851 at mm/vmalloc.c:542 vmap_pages_pud_range mm/vmalloc.c:587 [inline] WARNING: CPU: 1 PID: 5851 at mm/vmalloc.c:542 vmap_pages_p4d_range mm/vmalloc.c:605 [inline] WARNING: CPU: 1 PID: 5851 at mm/vmalloc.c:542 vmap_small_pages_range_noflush+0x984/0xc90 mm/vmalloc.c:627 Modules linked in: CPU: 1 UID: 0 PID: 5851 Comm: syz-executor194 Not tainted 6.16.0-syzkaller-11952-g6e64f4580381 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:vmap_pages_pte_range mm/vmalloc.c:542 [inline] RIP: 0010:vmap_pages_pmd_range mm/vmalloc.c:569 [inline] RIP: 0010:vmap_pages_pud_range mm/vmalloc.c:587 [inline] RIP: 0010:vmap_pages_p4d_range mm/vmalloc.c:605 [inline] RIP: 0010:vmap_small_pages_range_noflush+0x984/0xc90 mm/vmalloc.c:627 Code: 4d 89 f4 4d 21 ec 4c 89 e7 e8 98 6c ab ff 4d 39 ec 75 68 e8 de 71 ab ff 4c 09 eb e9 c8 fd ff ff 4c 8b 34 24 e8 cd 71 ab ff 90 <0f> 0b 90 e9 fc fe ff ff e8 bf 71 ab ff 4c 89 e7 e8 07 00 f7 ff 31 RSP: 0018:ffffc90002ea7990 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea0003000000 RCX: ffffffff82101e9f RDX: ffff888025be2440 RSI: ffffffff82102153 RDI: 0000000000000005 RBP: ffff8880505c4508 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 8000000000000163 R14: 1ffff920005d4f47 R15: ffffc900602a1000 FS: 000055557d51e380(0000) GS:ffff8881247c4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055dad0a404b0 CR3: 0000000071b22000 CR4: 00000000003526f0 Call Trace: __vmap_pages_range_noflush mm/vmalloc.c:656 [inline] vmap_pages_range_noflush mm/vmalloc.c:681 [inline] vmap_pages_range mm/vmalloc.c:701 [inline] vmap+0x1aa/0x320 mm/vmalloc.c:3515 io_region_init_ptr io_uring/memmap.c:125 [inline] io_create_region+0x605/0xd40 io_uring/memmap.c:228 io_create_region_mmap_safe+0xb2/0x170 io_uring/memmap.c:245 io_register_mem_region io_uring/register.c:616 [inline] __io_uring_register+0x59f/0x2440 io_uring/register.c:836 __do_sys_io_uring_register io_uring/register.c:929 [inline] __se_sys_io_uring_register io_uring/register.c:906 [inline] __x64_sys_io_uring_register+0x169/0x280 io_uring/register.c:906 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff9c19ee429 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffec21487c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 0000000000000045 RCX: 00007ff9c19ee429 RDX: 0000200000000200 RSI: 0000000000000022 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007ff9c1a66220 R10: 0000000000000001 R11: 0000000000000246 R12: 0000200000000300 R13: 0000200000000100 R14: 0000000000000001 R15: 0000000000000001 --- 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@googlegroups.com. 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