syzbot


WARNING in alloc_frozen_pages_noprof

Status: upstream: reported C repro on 2025/08/12 21:56
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+3f9768ec54c86997ddfb@syzkaller.appspotmail.com
First crash: 1d05h, last: 6h20m
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [mm?] WARNING in alloc_frozen_pages_noprof 2 (3) 2025/08/13 04:49

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6739 at mm/page_alloc.c:5124 __alloc_frozen_pages_noprof+0xd0/0x318 mm/page_alloc.c:5124
Modules linked in:
CPU: 0 UID: 0 PID: 6739 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 : ffff80009f7675e0
x29: ffff80009f7676b0 x28: 1fffe0001ad78540 x27: ffff80009f767980
x26: 1ffff00012eb431c x25: dfff800000000000 x24: ffff80009f767600
x23: ffff700013eecec0 x22: 0000000000000000 x21: 0000000000040d40
x20: 0000000000000000 x19: 0000000000000024 x18: 1fffe0003379be88
x17: ffff80008f7be000 x16: ffff80008af6de48 x15: 0000000000000005
x14: 1ffff00013eecec4 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700013eecec9 x10: dfff800000000000 x9 : 0000000000000001
x8 : ffff800092df4000 x7 : 0000000000000000 x6 : ffff8000802312a4
x5 : ffff0000d9a87e68 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 __alloc_frozen_pages_noprof+0xd0/0x318 mm/page_alloc.c:5124 (P)
 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
 __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: 1528
hardirqs last  enabled at (1527): [<ffff800080c6f5fc>] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234
hardirqs last disabled at (1528): [<ffff80008b001bfc>] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574
softirqs last  enabled at (1368): [<ffff800080aab748>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (1368): [<ffff800080aab748>] bdi_register_va+0x534/0x7e4 mm/backing-dev.c:1114
softirqs last disabled at (1366): [<ffff800080aab534>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (1366): [<ffff800080aab534>] bdi_register_va+0x320/0x7e4 mm/backing-dev.c:1104
---[ end trace 0000000000000000 ]---

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/12 23:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 c06e8995 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in alloc_frozen_pages_noprof
2025/08/12 22:44 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 c06e8995 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in alloc_frozen_pages_noprof
2025/08/12 21:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 c06e8995 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in alloc_frozen_pages_noprof
2025/08/12 20:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 c06e8995 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in alloc_frozen_pages_noprof
2025/08/13 19:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in alloc_frozen_pages_noprof
2025/08/13 14:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in alloc_frozen_pages_noprof
2025/08/12 19:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in alloc_frozen_pages_noprof
* Struck through repros no longer work on HEAD.