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Message-ID: <000000000000e85eff05e6bbeed3@google.com>
Date: Sun, 21 Aug 2022 01:15:25 -0700
From: syzbot <syzbot+0c4c86507aef43117d25@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, bigeasy@...utronix.de,
bpf@...r.kernel.org, brauner@...nel.org, david@...hat.com,
ebiederm@...ssion.com, linux-kernel@...r.kernel.org,
linux-usb@...r.kernel.org, luto@...nel.org,
syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: [syzbot] usb-testing boot error: general protection fault in mm_alloc
Hello,
syzbot found the following issue on:
HEAD commit: ad57410d231d usb: gadget: rndis: use %u instead of %d to p..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=15b2b1a5080000
kernel config: https://syzkaller.appspot.com/x/.config?x=3cb39b084894e9a5
dashboard link: https://syzkaller.appspot.com/bug?extid=0c4c86507aef43117d25
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0c4c86507aef43117d25@...kaller.appspotmail.com
general protection fault, probably for non-canonical address 0xffff000000000328: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0xfff8200000001940-0xfff8200000001947]
CPU: 0 PID: 266 Comm: kworker/u4:2 Not tainted 6.0.0-rc1-syzkaller-00005-gad57410d231d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:freelist_dereference mm/slub.c:347 [inline]
RIP: 0010:get_freepointer mm/slub.c:354 [inline]
RIP: 0010:get_freepointer_safe mm/slub.c:368 [inline]
RIP: 0010:slab_alloc_node mm/slub.c:3211 [inline]
RIP: 0010:slab_alloc mm/slub.c:3251 [inline]
RIP: 0010:__kmem_cache_alloc_lru mm/slub.c:3258 [inline]
RIP: 0010:kmem_cache_alloc+0x15d/0x4a0 mm/slub.c:3268
Code: 51 08 48 8b 01 48 83 79 10 00 48 89 04 24 0f 84 7c 02 00 00 48 85 c0 0f 84 73 02 00 00 49 8b 3c 24 41 8b 4c 24 28 40 f6 c7 0f <48> 8b 1c 08 0f 85 7b 02 00 00 48 8d 4a 08 65 48 0f c7 0f 0f 94 c0
RSP: 0000:ffffc900015dfe18 EFLAGS: 00010246
RAX: ffff000000000000 RBX: ffff88810e746600 RCX: 0000000000000328
RDX: 0000000000000338 RSI: 0000000000000cc0 RDI: 000000000003e3f0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88810016d8c0
R13: 0000000000000cc0 R14: ffffffff811440e9 R15: 0000000000000cc0
FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 0000000007825000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
mm_alloc+0x19/0xc0 kernel/fork.c:1171
bprm_mm_init fs/exec.c:369 [inline]
alloc_bprm+0x1c3/0x900 fs/exec.c:1534
kernel_execve+0xab/0x500 fs/exec.c:1974
call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:freelist_dereference mm/slub.c:347 [inline]
RIP: 0010:get_freepointer mm/slub.c:354 [inline]
RIP: 0010:get_freepointer_safe mm/slub.c:368 [inline]
RIP: 0010:slab_alloc_node mm/slub.c:3211 [inline]
RIP: 0010:slab_alloc mm/slub.c:3251 [inline]
RIP: 0010:__kmem_cache_alloc_lru mm/slub.c:3258 [inline]
RIP: 0010:kmem_cache_alloc+0x15d/0x4a0 mm/slub.c:3268
Code: 51 08 48 8b 01 48 83 79 10 00 48 89 04 24 0f 84 7c 02 00 00 48 85 c0 0f 84 73 02 00 00 49 8b 3c 24 41 8b 4c 24 28 40 f6 c7 0f <48> 8b 1c 08 0f 85 7b 02 00 00 48 8d 4a 08 65 48 0f c7 0f 0f 94 c0
RSP: 0000:ffffc900015dfe18 EFLAGS: 00010246
RAX: ffff000000000000 RBX: ffff88810e746600 RCX: 0000000000000328
RDX: 0000000000000338 RSI: 0000000000000cc0 RDI: 000000000003e3f0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88810016d8c0
R13: 0000000000000cc0 R14: ffffffff811440e9 R15: 0000000000000cc0
FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 0000000007825000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 51 push %rcx
1: 08 48 8b or %cl,-0x75(%rax)
4: 01 48 83 add %ecx,-0x7d(%rax)
7: 79 10 jns 0x19
9: 00 48 89 add %cl,-0x77(%rax)
c: 04 24 add $0x24,%al
e: 0f 84 7c 02 00 00 je 0x290
14: 48 85 c0 test %rax,%rax
17: 0f 84 73 02 00 00 je 0x290
1d: 49 8b 3c 24 mov (%r12),%rdi
21: 41 8b 4c 24 28 mov 0x28(%r12),%ecx
26: 40 f6 c7 0f test $0xf,%dil
* 2a: 48 8b 1c 08 mov (%rax,%rcx,1),%rbx <-- trapping instruction
2e: 0f 85 7b 02 00 00 jne 0x2af
34: 48 8d 4a 08 lea 0x8(%rdx),%rcx
38: 65 48 0f c7 0f cmpxchg16b %gs:(%rdi)
3d: 0f 94 c0 sete %al
---
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.
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