linux-kernel - [syzbot] [net?] WARNING in nsim_dev_health_break

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Message-ID: <675c6862.050a0220.37aaf.00b1.GAE@google.com>
Date: Fri, 13 Dec 2024 09:01:22 -0800
From: syzbot <syzbot+ea40e4294e58b0292f74@...kaller.appspotmail.com>
To: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com, 
	kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
	pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [net?] WARNING in nsim_dev_health_break_write

Hello,

syzbot found the following issue on:

HEAD commit:    150b567e0d57 Merge tag 'net-6.13-rc3' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14edcd44580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=99a5586995ec03b2
dashboard link: https://syzkaller.appspot.com/bug?extid=ea40e4294e58b0292f74
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=173d9be8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17421cdf980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/571ae574df22/disk-150b567e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5a2f7a8cf4f9/vmlinux-150b567e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4a8c47c8652b/bzImage-150b567e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ea40e4294e58b0292f74@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5863 at mm/page_alloc.c:4727 __alloc_pages_noprof+0xeff/0x25b0 mm/page_alloc.c:4727
Modules linked in:
CPU: 0 UID: 0 PID: 5863 Comm: syz-executor347 Not tainted 6.13.0-rc2-syzkaller-00130-g150b567e0d57 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:__alloc_pages_noprof+0xeff/0x25b0 mm/page_alloc.c:4727
Code: 24 2c 00 00 00 00 89 cd 0f 84 8b f9 ff ff 8b 34 24 48 89 da 8b 7c 24 08 e8 0e b3 fe ff e9 69 f9 ff ff c6 05 e1 44 16 0e 01 90 <0f> 0b 90 31 db e9 9f f3 ff ff 89 14 24 e8 9f a2 0c 00 8b 14 24 e9
RSP: 0018:ffffc90003e1f938 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000013 RDI: 0000000000040cc0
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000013
R13: 0000000000040cc0 R14: 1ffff920007c3f3b R15: 00000000ffffffff
FS:  0000555585a3f380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 00000000293fe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 ___kmalloc_large_node+0x84/0x1b0 mm/slub.c:4228
 __kmalloc_large_node_noprof+0x1c/0x70 mm/slub.c:4255
 __do_kmalloc_node mm/slub.c:4271 [inline]
 __kmalloc_node_track_caller_noprof.cold+0x5/0x5f mm/slub.c:4302
 memdup_user_nul+0x2b/0x110 mm/util.c:305
 nsim_dev_health_break_write+0x9a/0x1e0 drivers/net/netdevsim/health.c:152
 full_proxy_write+0xfb/0x1b0 fs/debugfs/file.c:356
 vfs_write+0x24c/0x1150 fs/read_write.c:677
 ksys_write+0x12b/0x250 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f199a1a5959
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdd157ce88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f199a1a5959
RDX: 00000000fffffdef RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdd157cee0
R13: 00007f199a1f23fe R14: 0000000000000003 R15: 00007ffdd157cec0
 </TASK>


---
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