Message-ID: <00000000000033acbf05d1a969aa@google.com>
Date:   Thu, 25 Nov 2021 20:20:28 -0800
From:   syzbot <syzbot+cecf5b7071a0dfb76530@...kaller.appspotmail.com>
To:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, davem@...emloft.net, hawk@...nel.org,
        john.fastabend@...il.com, kafai@...com, kpsingh@...nel.org,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, yhs@...com
Subject: [syzbot] WARNING: kmalloc bug in bpf

Hello,

syzbot found the following issue on:

HEAD commit:    e4f7ac90c2b0 selftests/bpf: Mix legacy (maps) and modern (..
git tree:       bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17418e09b00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a262045c4c15a9e0
dashboard link: https://syzkaller.appspot.com/bug?extid=cecf5b7071a0dfb76530
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+cecf5b7071a0dfb76530@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 372 at mm/util.c:597 kvmalloc_node+0x111/0x120 mm/util.c:597
Modules linked in:
CPU: 1 PID: 372 Comm: syz-executor.4 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kvmalloc_node+0x111/0x120 mm/util.c:597
Code: 01 00 00 00 4c 89 e7 e8 7d f7 0c 00 49 89 c5 e9 69 ff ff ff e8 60 20 d1 ff 41 89 ed 41 81 cd 00 20 01 00 eb 95 e8 4f 20 d1 ff <0f> 0b e9 4c ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 e8 36
RSP: 0018:ffffc90002bf7c98 EFLAGS: 00010216
RAX: 00000000000000ec RBX: 1ffff9200057ef9f RCX: ffffc9000ac63000
RDX: 0000000000040000 RSI: ffffffff81a6a621 RDI: 0000000000000003
RBP: 0000000000102cc0 R08: 000000007fffffff R09: 00000000ffffffff
R10: ffffffff81a6a5de R11: 0000000000000000 R12: 00000000ffff9aaa
R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000000
FS:  00007f05f2573700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f424000 CR3: 0000000027d2c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvmalloc include/linux/slab.h:741 [inline]
 map_lookup_elem kernel/bpf/syscall.c:1090 [inline]
 __sys_bpf+0x3a5b/0x5f00 kernel/bpf/syscall.c:4603
 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4720 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4720
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f05f4ffdae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f05f2573188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f05f5110f60 RCX: 00007f05f4ffdae9
RDX: 0000000000000020 RSI: 0000000020000100 RDI: 0000000000000001
RBP: 00007f05f5057f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffa4b9a31f R14: 00007f05f2573300 R15: 0000000000022000
 </TASK>


---
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