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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > console output: https://syzkaller.appspot.com/x/log.txt?x=1568cc34580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8c5ac3d8b8abfcb > dashboard link: https://syzkaller.appspot.com/bug?extid=3f9768ec54c86997ddfb > compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 > userspace arch: arm64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=132b19a2580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=164da842580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/18a2e4bd0c4a/disk-8f5ae30d.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/3b5395881b25/vmlinux-8f5ae30d.xz > kernel image: https://storage.googleapis.com/syzbot-assets/e875f4e3b7ff/Image-8f5ae30d.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+3f9768ec54c86997ddfb@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 6777 at mm/page_alloc.c:5124 __alloc_frozen_pages_noprof+0xd0/0x318 mm/page_alloc.c:5124 > Modules linked in: > CPU: 1 UID: 0 PID: 6777 Comm: syz.0.17 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2025 > pstate: 23400005 (nzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) > pc : __alloc_frozen_pages_noprof+0xd0/0x318 mm/page_alloc.c:5124 > lr : __alloc_frozen_pages_noprof+0xac/0x318 mm/page_alloc.c:5118 > sp : ffff8000a3d575e0 > x29: ffff8000a3d576b0 x28: 1fffe00018f73d00 x27: ffff8000a3d57980 > x26: 1ffff00012eb431c x25: dfff800000000000 x24: ffff8000a3d57600 > x23: ffff7000147aaec0 x22: 0000000000000000 x21: 0000000000040d40 > x20: 0000000000000000 x19: 0000000000000024 x18: 1fffe000337a0688 > x17: ffff0001fea8c8b0 x16: ffff80008af6de48 x15: 0000000000000005 > x14: 1ffff000147aaec4 x13: 0000000000000000 x12: 0000000000000000 > x11: ffff7000147aaec9 x10: dfff800000000000 x9 : 0000000000000001 > x8 : ffff800092df4000 x7 : 0000000000000000 x6 : ffff8000802312a4 > x5 : ffff0000c7b3db38 x4 : 0000000000000000 x3 : 0000000000000020 > x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000 > Call trace: > __alloc_frozen_pages_noprof+0xd0/0x318 mm/page_alloc.c:5124 (P) The warning is: /* * There are several places where we assume that the order value is sane * so bail out early if the request is out of bound. */ if (WARN_ON_ONCE_GFP(order > MAX_PAGE_ORDER, gfp)) return NULL; There's not much the buddy allocator can do when a user requests order > MAX_PAGE_ORDER allocations. > alloc_pages_mpol+0x1e4/0x460 mm/mempolicy.c:2416 > alloc_frozen_pages_noprof+0xe0/0x210 mm/mempolicy.c:2487 > ___kmalloc_large_node+0xac/0x154 mm/slub.c:4306 > __kmalloc_large_node_noprof+0x2c/0x8c mm/slub.c:4337 > __do_kmalloc_node mm/slub.c:4353 [inline] > __kmalloc_noprof+0x3bc/0x4c8 mm/slub.c:4377 > kmalloc_noprof include/linux/slab.h:909 [inline] > kzalloc_noprof include/linux/slab.h:1039 [inline] > v9fs_fid_get_acl+0x64/0x114 fs/9p/acl.c:32 So... 9p FS shouldn't really request that? Cc'ing 9p FS folks. > __v9fs_get_acl fs/9p/acl.c:66 [inline] > v9fs_get_acl+0xa8/0x3ac fs/9p/acl.c:92 > v9fs_qid_iget_dotl fs/9p/vfs_inode_dotl.c:131 [inline] > v9fs_inode_from_fid_dotl+0x1d8/0x26c fs/9p/vfs_inode_dotl.c:154 > v9fs_get_new_inode_from_fid fs/9p/v9fs.h:251 [inline] > v9fs_mount+0x5b8/0x910 fs/9p/vfs_super.c:144 > legacy_get_tree+0xd4/0x16c fs/fs_context.c:666 > vfs_get_tree+0x90/0x28c fs/super.c:1815 > do_new_mount+0x278/0x7f4 fs/namespace.c:3805 > path_mount+0x5b4/0xde0 fs/namespace.c:4120 > do_mount fs/namespace.c:4133 [inline] > __do_sys_mount fs/namespace.c:4344 [inline] > __se_sys_mount fs/namespace.c:4321 [inline] > __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4321 > __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] > invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 > el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 > do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 > el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 > el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 > el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 > irq event stamp: 3156 > hardirqs last enabled at (3155): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 > hardirqs last disabled at (3156): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 > softirqs last enabled at (2974): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] > softirqs last enabled at (2974): [] bdi_register_va+0x534/0x7e4 mm/backing-dev.c:1114 > softirqs last disabled at (2972): [] spin_lock_bh include/linux/spinlock.h:356 [inline] > softirqs last disabled at (2972): [] bdi_register_va+0x320/0x7e4 mm/backing-dev.c:1104 > ---[ end trace 0000000000000000 ]--- > > > --- > 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. > > 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