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Message-ID: <000000000000077caa05e67e7461@google.com>
Date: Wed, 17 Aug 2022 23:54:30 -0700
From: syzbot <syzbot+7b9133d0ed61f27a4f7d@...kaller.appspotmail.com>
To: borisp@...dia.com, davem@...emloft.net, edumazet@...gle.com,
john.fastabend@...il.com, kuba@...nel.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] general protection fault in tls_strp_load_anchor_with_queue
Hello,
syzbot found the following issue on:
HEAD commit: 7ebfc85e2cd7 Merge tag 'net-6.0-rc1' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1750b16b080000
kernel config: https://syzkaller.appspot.com/x/.config?x=924833c12349a8c0
dashboard link: https://syzkaller.appspot.com/bug?extid=7b9133d0ed61f27a4f7d
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+7b9133d0ed61f27a4f7d@...kaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 1 PID: 9070 Comm: syz-executor.1 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:tls_strp_load_anchor_with_queue+0x111/0x360 net/tls/tls_strp.c:329
Code: 48 c1 ea 03 80 3c 02 00 0f 85 26 02 00 00 4c 8b 73 18 41 01 f4 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 70 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e3 01 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc900051c7b88 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff88801fe3f0d0 RCX: ffffc9000ac99000
RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000070
RBP: ffff8880174dcb40 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 1ffff92000a38f72 R14: 0000000000000000 R15: ffff88801fe3f0e8
FS: 00007fc847b72700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc847b71ff8 CR3: 0000000079991000 CR4: 0000000000350ee0
Call Trace:
<TASK>
tls_strp_read_sock+0x3a4/0x840 net/tls/tls_strp.c:379
tls_strp_check_rcv+0x79/0xb0 net/tls/tls_strp.c:404
do_tls_setsockopt_conf net/tls/tls_main.c:731 [inline]
do_tls_setsockopt net/tls/tls_main.c:801 [inline]
tls_setsockopt+0xecb/0x1240 net/tls/tls_main.c:829
__sys_setsockopt+0x2d6/0x690 net/socket.c:2252
__do_sys_setsockopt net/socket.c:2263 [inline]
__se_sys_setsockopt net/socket.c:2260 [inline]
__x64_sys_setsockopt+0xba/0x150 net/socket.c:2260
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+0x63/0xcd
RIP: 0033:0x7fc846a89279
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc847b72168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fc846b9bf80 RCX: 00007fc846a89279
RDX: 0000000000000002 RSI: 000000000000011a RDI: 0000000000000003
RBP: 00007fc847b721d0 R08: 0000000000000038 R09: 0000000000000000
R10: 00000000200004c0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffd9012e3f R14: 00007fc847b72300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tls_strp_load_anchor_with_queue+0x111/0x360 net/tls/tls_strp.c:329
Code: 48 c1 ea 03 80 3c 02 00 0f 85 26 02 00 00 4c 8b 73 18 41 01 f4 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 70 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e e3 01 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc900051c7b88 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff88801fe3f0d0 RCX: ffffc9000ac99000
RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000070
RBP: ffff8880174dcb40 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 1ffff92000a38f72 R14: 0000000000000000 R15: ffff88801fe3f0e8
FS: 00007fc847b72700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc280ded718 CR3: 0000000079991000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 48 c1 ea 03 shr $0x3,%rdx
4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
8: 0f 85 26 02 00 00 jne 0x234
e: 4c 8b 73 18 mov 0x18(%rbx),%r14
12: 41 01 f4 add %esi,%r12d
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 49 8d 7e 70 lea 0x70(%r14),%rdi
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e e3 01 00 00 jle 0x21d
3a: 48 rex.W
3b: b8 00 00 00 00 mov $0x0,%eax
---
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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