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Date: Mon, 08 May 2023 09:51:54 -0700
From: syzbot <syzbot+fae676d3cf469331fc89@...kaller.appspotmail.com>
To: andrii@...nel.org, ast@...nel.org, bjorn@...nel.org,
bpf@...r.kernel.org, daniel@...earbox.net, davem@...emloft.net,
edumazet@...gle.com, hawk@...nel.org, john.fastabend@...il.com,
jonathan.lemon@...il.com, kuba@...nel.org,
linux-kernel@...r.kernel.org, maciej.fijalkowski@...el.com,
magnus.karlsson@...el.com, netdev@...r.kernel.org,
pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bpf?] [net?] WARNING: zero-size vmalloc in print_tainted
Hello,
syzbot found the following issue on:
HEAD commit: 457391b03803 Linux 6.3
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1697e9d4280000
kernel config: https://syzkaller.appspot.com/x/.config?x=385e197a58ca4afe
dashboard link: https://syzkaller.appspot.com/bug?extid=fae676d3cf469331fc89
compiler: arm-linux-gnueabi-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15916904280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10910f18280000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/c35b5b2731d2/non_bootable_disk-457391b0.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2a1bf3bafeb6/vmlinux-457391b0.xz
kernel image: https://storage.googleapis.com/syzbot-assets/21f1e3b4a5a9/zImage-457391b0.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+fae676d3cf469331fc89@...kaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 2949 at mm/vmalloc.c:3132 __vmalloc_node_range+0x44c/0x584 mm/vmalloc.c:3132
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 PID: 2949 Comm: syz-executor398 Not tainted 6.3.0-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace:
[<817b2528>] (dump_backtrace) from [<817b261c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
r7:81d81ac0 r6:82422c04 r5:60000093 r4:81d901cc
[<817b2604>] (show_stack) from [<817cec84>] (__dump_stack lib/dump_stack.c:88 [inline])
[<817b2604>] (show_stack) from [<817cec84>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<817cec3c>] (dump_stack_lvl) from [<817ceca8>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
r5:00000000 r4:8264dd14
[<817cec90>] (dump_stack) from [<817b3110>] (panic+0x11c/0x36c kernel/panic.c:340)
[<817b2ff4>] (panic) from [<802422ec>] (print_tainted+0x0/0xa0 kernel/panic.c:236)
r3:8240c488 r2:00000001 r1:81d79fcc r0:81d81ac0
r7:80469ba0
[<80242268>] (check_panic_on_warn) from [<802424e0>] (__warn+0x7c/0x180 kernel/panic.c:673)
[<80242464>] (__warn) from [<802426bc>] (warn_slowpath_fmt+0xd8/0x1d8 kernel/panic.c:697)
r8:00000009 r7:00000c3c r6:81da5110 r5:8240c954 r4:822ab6bc
[<802425e8>] (warn_slowpath_fmt) from [<80469ba0>] (__vmalloc_node_range+0x44c/0x584 mm/vmalloc.c:3132)
r10:00000dc0 r9:8410d080 r8:83d04e80 r7:df800000 r6:00004000 r5:00000000
r4:00000000
[<80469754>] (__vmalloc_node_range) from [<80469db0>] (vmalloc_user+0x6c/0x74 mm/vmalloc.c:3359)
r10:00000126 r9:8410d080 r8:83d04e80 r7:00000000 r6:00000000 r5:842aa940
r4:00000000
[<80469d44>] (vmalloc_user) from [<81767778>] (xskq_create+0x74/0xc4 net/xdp/xsk_queue.c:39)
[<81767704>] (xskq_create) from [<81766c64>] (xsk_init_queue net/xdp/xsk.c:756 [inline])
[<81767704>] (xskq_create) from [<81766c64>] (xsk_setsockopt+0x1c0/0x2bc net/xdp/xsk.c:1080)
r7:83d04eac r6:83d04c00 r5:00000000 r4:00000003
[<81766aa8>] (xsk_setsockopt) from [<812f6720>] (__sys_setsockopt+0xd4/0x1c8 net/socket.c:2271)
r8:80200288 r7:00000126 r6:000118b0 r5:81766aa4 r4:844eb900
[<812f664c>] (__sys_setsockopt) from [<812f6830>] (__do_sys_setsockopt net/socket.c:2282 [inline])
[<812f664c>] (__sys_setsockopt) from [<812f6830>] (sys_setsockopt+0x1c/0x24 net/socket.c:2279)
r5:00000000 r4:00000020
[<812f6814>] (sys_setsockopt) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xdf981fa8 to 0xdf981ff0)
1fa0: 00000020 00000000 00000003 0000011b 00000003 20000040
1fc0: 00000020 00000000 000118b0 00000126 000f4240 00000000 00000000 00003a97
1fe0: 7e9b4c90 7e9b4c80 00010624 0002a900
Rebooting in 86400 seconds..
---
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@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, 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 change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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