* [syzbot] [mm?] WARNING in v9fs_fid_get_acl (2)
@ 2026-09-19 5:07 syzbot
2026-09-19 10:14 ` Andrew Morton
0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2026-09-19 5:07 UTC (permalink / raw)
To: akpm, apopple, byungchul, david, gourry, joshua.hahnjy,
linux-kernel, linux-mm, matthew.brost, rakie.kim, syzkaller-bugs,
ying.huang, ziy
Hello,
syzbot found the following issue on:
HEAD commit: 587858367581 Merge tag 'nfsd-7.3-1' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1361a115580000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c5c3949d762a91f
dashboard link: https://syzkaller.appspot.com/bug?extid=de6fd6789748a8aa64a0
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f64df9580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e1a115580000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-58785836.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f8460d7438eb/vmlinux-58785836.xz
kernel image: https://storage.googleapis.com/syzbot-assets/551bf08b9af2/bzImage-58785836.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+de6fd6789748a8aa64a0@syzkaller.appspotmail.com
------------[ cut here ]------------
1
WARNING: mm/page_alloc.c:5340 at alloc_order_allowed mm/page_alloc.c:5340 [inline], CPU#0: syz.1.357/7872
WARNING: mm/page_alloc.c:5340 at __alloc_frozen_pages_noprof+0x2137/0x3300 mm/page_alloc.c:5397, CPU#0: syz.1.357/7872
Modules linked in:
CPU: 0 UID: 0 PID: 7872 Comm: syz.1.357 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:alloc_order_allowed mm/page_alloc.c:5340 [inline]
RIP: 0010:__alloc_frozen_pages_noprof+0x2137/0x3300 mm/page_alloc.c:5397
Code: 13 00 00 39 84 24 98 00 00 00 0f 85 4a fa ff ff e9 91 f6 ff ff 80 3d e2 93 bb 0e 00 0f 85 9d e2 ff ff c6 05 d5 93 bb 0e 01 90 <0f> 0b 90 e9 8d e2 ff ff 31 c0 e9 5f ec ff ff 48 8b 7c 24 08 48 c7
RSP: 0018:ffffc90004df7758 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000029 RDI: 0000000000040d40
RBP: 0000000000000029 R08: 0000000000000000 R09: 0000000000000009
R10: 0000000000000029 R11: 0000000000000000 R12: 0000000000040d40
R13: 1ffff920009bef47 R14: 0000000000000000 R15: 1ffff920009bef05
FS: 00007fc8804026c0(0000) GS:ffff8880d5b59000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc88037dff8 CR3: 0000000037685000 CR4: 0000000000352ef0
Call Trace:
<TASK>
alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486
___kmalloc_large_node+0xe8/0x130 mm/slub.c:5353
__kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:5385
__do_kmalloc_node mm/slub.c:5402 [inline]
__kmalloc_noprof+0x5a8/0x840 mm/slub.c:5439
_kmalloc_noprof include/linux/slab.h:995 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
v9fs_fid_get_acl+0x7a/0x120 fs/9p/acl.c:33
__v9fs_get_acl fs/9p/acl.c:67 [inline]
v9fs_get_acl+0xe8/0x480 fs/9p/acl.c:93
v9fs_qid_iget_dotl fs/9p/vfs_inode_dotl.c:131 [inline]
v9fs_inode_from_fid_dotl+0x26d/0x300 fs/9p/vfs_inode_dotl.c:154
v9fs_get_new_inode_from_fid fs/9p/v9fs.h:264 [inline]
v9fs_get_tree+0x55c/0xb50 fs/9p/vfs_super.c:120
vfs_get_tree+0x92/0x320 fs/super.c:1933
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount fs/namespace.c:3848 [inline]
path_mount+0x7d0/0x24c0 fs/namespace.c:4168
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount fs/namespace.c:4374 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc87f59e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc880402028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc87f825fa0 RCX: 00007fc87f59e159
RDX: 0000200000000240 RSI: 0000200000000200 RDI: 0000000000000000
RBP: 00007fc87f63503b R08: 0000200000000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc87f826038 R14: 00007fc87f825fa0 R15: 00007ffeeb3b2c38
</TASK>
---
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:
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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
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [syzbot] [mm?] WARNING in v9fs_fid_get_acl (2)
2026-09-19 5:07 [syzbot] [mm?] WARNING in v9fs_fid_get_acl (2) syzbot
@ 2026-09-19 10:14 ` Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2026-09-19 10:14 UTC (permalink / raw)
To: syzbot
Cc: apopple, byungchul, david, gourry, joshua.hahnjy, linux-kernel,
linux-mm, matthew.brost, rakie.kim, syzkaller-bugs, ying.huang,
ziy, Eric Van Hensbergen, Latchesar Ionkov, Dominique Martinet,
Christian Schoenebeck, v9fs
On Fri, 18 Sep 2026 22:07:23 -0700 syzbot <syzbot+de6fd6789748a8aa64a0@syzkaller.appspotmail.com> wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 587858367581 Merge tag 'nfsd-7.3-1' of git://git.kernel.or..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1361a115580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=8c5c3949d762a91f
> dashboard link: https://syzkaller.appspot.com/bug?extid=de6fd6789748a8aa64a0
> compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f64df9580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e1a115580000
>
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-58785836.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/f8460d7438eb/vmlinux-58785836.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/551bf08b9af2/bzImage-58785836.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+de6fd6789748a8aa64a0@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> 1
> WARNING: mm/page_alloc.c:5340 at alloc_order_allowed mm/page_alloc.c:5340 [inline], CPU#0: syz.1.357/7872
> WARNING: mm/page_alloc.c:5340 at __alloc_frozen_pages_noprof+0x2137/0x3300 mm/page_alloc.c:5397, CPU#0: syz.1.357/7872
Thanks. Caused by an old v9fs bug. A fix was proposed but never merged:
https://lists.openwall.net/linux-kernel/2024/02/02/806?utm_source=chatgpt.com
> Modules linked in:
> CPU: 0 UID: 0 PID: 7872 Comm: syz.1.357 Not tainted syzkaller #0 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
> RIP: 0010:alloc_order_allowed mm/page_alloc.c:5340 [inline]
> RIP: 0010:__alloc_frozen_pages_noprof+0x2137/0x3300 mm/page_alloc.c:5397
> Code: 13 00 00 39 84 24 98 00 00 00 0f 85 4a fa ff ff e9 91 f6 ff ff 80 3d e2 93 bb 0e 00 0f 85 9d e2 ff ff c6 05 d5 93 bb 0e 01 90 <0f> 0b 90 e9 8d e2 ff ff 31 c0 e9 5f ec ff ff 48 8b 7c 24 08 48 c7
> RSP: 0018:ffffc90004df7758 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: 0000000000000029 RDI: 0000000000040d40
> RBP: 0000000000000029 R08: 0000000000000000 R09: 0000000000000009
> R10: 0000000000000029 R11: 0000000000000000 R12: 0000000000040d40
> R13: 1ffff920009bef47 R14: 0000000000000000 R15: 1ffff920009bef05
> FS: 00007fc8804026c0(0000) GS:ffff8880d5b59000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007fc88037dff8 CR3: 0000000037685000 CR4: 0000000000352ef0
> Call Trace:
> <TASK>
> alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486
> ___kmalloc_large_node+0xe8/0x130 mm/slub.c:5353
> __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:5385
> __do_kmalloc_node mm/slub.c:5402 [inline]
> __kmalloc_noprof+0x5a8/0x840 mm/slub.c:5439
> _kmalloc_noprof include/linux/slab.h:995 [inline]
> _kzalloc_noprof include/linux/slab.h:1312 [inline]
> v9fs_fid_get_acl+0x7a/0x120 fs/9p/acl.c:33
> __v9fs_get_acl fs/9p/acl.c:67 [inline]
> v9fs_get_acl+0xe8/0x480 fs/9p/acl.c:93
> v9fs_qid_iget_dotl fs/9p/vfs_inode_dotl.c:131 [inline]
> v9fs_inode_from_fid_dotl+0x26d/0x300 fs/9p/vfs_inode_dotl.c:154
> v9fs_get_new_inode_from_fid fs/9p/v9fs.h:264 [inline]
> v9fs_get_tree+0x55c/0xb50 fs/9p/vfs_super.c:120
> vfs_get_tree+0x92/0x320 fs/super.c:1933
> fc_mount fs/namespace.c:1198 [inline]
> do_new_mount_fc fs/namespace.c:3772 [inline]
> do_new_mount fs/namespace.c:3848 [inline]
> path_mount+0x7d0/0x24c0 fs/namespace.c:4168
> do_mount fs/namespace.c:4181 [inline]
> __do_sys_mount fs/namespace.c:4397 [inline]
> __se_sys_mount fs/namespace.c:4374 [inline]
> __x64_sys_mount+0x293/0x310 fs/namespace.c:4374
> do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
> do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7fc87f59e159
> Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007fc880402028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
> RAX: ffffffffffffffda RBX: 00007fc87f825fa0 RCX: 00007fc87f59e159
> RDX: 0000200000000240 RSI: 0000200000000200 RDI: 0000000000000000
> RBP: 00007fc87f63503b R08: 0000200000000180 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007fc87f826038 R14: 00007fc87f825fa0 R15: 00007ffeeb3b2c38
> </TASK>
>
>
> ---
> 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
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2026-09-19 10:14 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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2026-09-19 5:07 [syzbot] [mm?] WARNING in v9fs_fid_get_acl (2) syzbot
2026-09-19 10:14 ` Andrew Morton
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