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Date: Mon, 15 Nov 2021 15:16:24 +0200
From: Leon Romanovsky <leon@...nel.org>
To: syzbot <syzbot+9111d2255a9710e87562@...kaller.appspotmail.com>
Cc: aharonl@...dia.com, dledford@...hat.com, jgg@...pe.ca,
linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
markzhang@...dia.com, netao@...dia.com, netdev@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] general protection fault in nldev_stat_set_doit (2)
On Sun, Nov 14, 2021 at 01:18:28PM -0800, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 70701b83e208 tcp: Fix uninitialized access in skb frags ar..
> git tree: net
> console output: https://syzkaller.appspot.com/x/log.txt?x=1654c32ab00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a262045c4c15a9e0
> dashboard link: https://syzkaller.appspot.com/bug?extid=9111d2255a9710e87562
> 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+9111d2255a9710e87562@...kaller.appspotmail.com
>
> general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
> CPU: 0 PID: 6744 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> RIP: 0010:nla_get_u32 include/net/netlink.h:1554 [inline]
> RIP: 0010:nldev_stat_set_mode_doit drivers/infiniband/core/nldev.c:1909 [inline]
> RIP: 0010:nldev_stat_set_doit+0x578/0x10d0 drivers/infiniband/core/nldev.c:2040
> Code: fa 4c 8b a4 24 f8 02 00 00 48 b8 00 00 00 00 00 fc ff df c7 84 24 80 00 00 00 00 00 00 00 49 8d 7c 24 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 02
> RSP: 0018:ffffc90004acf2e8 EFLAGS: 00010247
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002b94000
> RDX: 0000000000000000 RSI: ffffffff8684c5ff RDI: 0000000000000004
> RBP: ffff88807cda4000 R08: 0000000000000000 R09: ffff888023fb8027
> R10: ffffffff8684c5d7 R11: 0000000000000000 R12: 0000000000000000
> R13: 0000000000000001 R14: ffff888041024280 R15: ffff888031ade780
> FS: 00007eff9dddd700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000001b2ef24000 CR3: 0000000036902000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> <TASK>
> rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195
> rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
> rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259
> netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
> netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345
> netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916
> sock_sendmsg_nosec net/socket.c:704 [inline]
> sock_sendmsg+0xcf/0x120 net/socket.c:724
> ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
> ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
> __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
> 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: 0033:0x7effa0867ae9
> 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:00007eff9dddd188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> RAX: ffffffffffffffda RBX: 00007effa097af60 RCX: 00007effa0867ae9
> RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
> RBP: 00007effa08c1f6d R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007ffc008a753f R14: 00007eff9dddd300 R15: 0000000000022000
> </TASK>
> Modules linked in:
> ---[ end trace bacb470dc6c820de ]---
> RIP: 0010:nla_get_u32 include/net/netlink.h:1554 [inline]
> RIP: 0010:nldev_stat_set_mode_doit drivers/infiniband/core/nldev.c:1909 [inline]
> RIP: 0010:nldev_stat_set_doit+0x578/0x10d0 drivers/infiniband/core/nldev.c:2040
> Code: fa 4c 8b a4 24 f8 02 00 00 48 b8 00 00 00 00 00 fc ff df c7 84 24 80 00 00 00 00 00 00 00 49 8d 7c 24 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 02
> RSP: 0018:ffffc90004acf2e8 EFLAGS: 00010247
> RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002b94000
> RDX: 0000000000000000 RSI: ffffffff8684c5ff RDI: 0000000000000004
> RBP: ffff88807cda4000 R08: 0000000000000000 R09: ffff888023fb8027
> R10: ffffffff8684c5d7 R11: 0000000000000000 R12: 0000000000000000
> R13: 0000000000000001 R14: ffff888041024280 R15: ffff888031ade780
> FS: 00007eff9dddd700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000001b2ef24000 CR3: 0000000036902000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> ----------------
> Code disassembly (best guess):
> 0: fa cli
> 1: 4c 8b a4 24 f8 02 00 mov 0x2f8(%rsp),%r12
> 8: 00
> 9: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
> 10: fc ff df
> 13: c7 84 24 80 00 00 00 movl $0x0,0x80(%rsp)
> 1a: 00 00 00 00
> 1e: 49 8d 7c 24 04 lea 0x4(%r12),%rdi
> 23: 48 89 fa mov %rdi,%rdx
> 26: 48 c1 ea 03 shr $0x3,%rdx
> * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction
> 2e: 48 89 f8 mov %rdi,%rax
> 31: 83 e0 07 and $0x7,%eax
> 34: 83 c0 03 add $0x3,%eax
> 37: 38 d0 cmp %dl,%al
> 39: 7c 08 jl 0x43
> 3b: 84 d2 test %dl,%dl
> 3d: 0f .byte 0xf
> 3e: 85 02 test %eax,(%rdx)
>
>From fb6bcdb798854946a92ec556fbdf4956d0dc0128 Mon Sep 17 00:00:00 2001
Message-Id: <fb6bcdb798854946a92ec556fbdf4956d0dc0128.1636982132.git.leonro@...dia.com>
From: Leon Romanovsky <leonro@...dia.com>
Date: Mon, 15 Nov 2021 15:11:40 +0200
Subject: [PATCH] RDMA/nldev: Check stat attribute before accessing it
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 6744 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nla_get_u32 include/net/netlink.h:1554 [inline]
RIP: 0010:nldev_stat_set_mode_doit drivers/infiniband/core/nldev.c:1909 [inline]
RIP: 0010:nldev_stat_set_doit+0x578/0x10d0 drivers/infiniband/core/nldev.c:2040
Code: fa 4c 8b a4 24 f8 02 00 00 48 b8 00 00 00 00 00 fc ff df c7 84 24 80 00 00 00 00 00 00 00 49 8d 7c 24 04 48 89
fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 02
RSP: 0018:ffffc90004acf2e8 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002b94000
RDX: 0000000000000000 RSI: ffffffff8684c5ff RDI: 0000000000000004
RBP: ffff88807cda4000 R08: 0000000000000000 R09: ffff888023fb8027
R10: ffffffff8684c5d7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffff888041024280 R15: ffff888031ade780
FS: 00007eff9dddd700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ef24000 CR3: 0000000036902000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195
rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259
netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1345
netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1916
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
___sys_sendmsg+0xf3/0x170 net/socket.c:2463
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
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: 0033:0x7effa0867ae9
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:00007eff9dddd188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007effa097af60 RCX: 00007effa0867ae9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007effa08c1f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc008a753f R14: 00007eff9dddd300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace bacb470dc6c820de ]---
RIP: 0010:nla_get_u32 include/net/netlink.h:1554 [inline]
RIP: 0010:nldev_stat_set_mode_doit drivers/infiniband/core/nldev.c:1909 [inline]
RIP: 0010:nldev_stat_set_doit+0x578/0x10d0 drivers/infiniband/core/nldev.c:2040
Code: fa 4c 8b a4 24 f8 02 00 00 48 b8 00 00 00 00 00 fc ff df c7 84 24 80 00 00 00 00 00 00 00 49 8d 7c 24 04 48 89
fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 02
RSP: 0018:ffffc90004acf2e8 EFLAGS: 00010247
RIP: 0010:nldev_stat_set_mode_doit drivers/infiniband/core/nldev.c:1909 [inline]
RIP: 0010:nldev_stat_set_doit+0x578/0x10d0 drivers/infiniband/core/nldev.c:2040
Code: fa 4c 8b a4 24 f8 02 00 00 48 b8 00 00 00 00 00 fc ff df c7 84 24 80 00 00 00 00 00 00 00 49 8d 7c 24 04 48 89
fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 02
RSP: 0018:ffffc90004acf2e8 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002b94000
RDX: 0000000000000000 RSI: ffffffff8684c5ff RDI: 0000000000000004
RBP: ffff88807cda4000 R08: 0000000000000000 R09: ffff888023fb8027
R10: ffffffff8684c5d7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffff888041024280 R15: ffff888031ade780
FS: 00007eff9dddd700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ef24000 CR3: 0000000036902000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Fixes: 822cf785ac6d ("RDMA/nldev: Split nldev_stat_set_mode_doit out of nldev_stat_set_doit")
Reported-by: syzbot+9111d2255a9710e87562@...kaller.appspotmail.com
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
drivers/infiniband/core/nldev.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index fedc0fa6ebf9..f5aacaf7fb8e 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -1906,7 +1906,8 @@ static int nldev_stat_set_mode_doit(struct sk_buff *msg,
int ret;
/* Currently only counter for QP is supported */
- if (nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
+ if (!tb[RDMA_NLDEV_ATTR_STAT_RES] ||
+ nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_RES]) != RDMA_NLDEV_ATTR_RES_QP)
return -EINVAL;
mode = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_MODE]);
--
2.33.1
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