* Re: [syzbot] WARNING: kmalloc bug in hash_ip_create
2021-09-03 23:50 [syzbot] WARNING: kmalloc bug in hash_ip_create syzbot
@ 2021-09-03 23:56 ` Eric Dumazet
2021-09-05 23:21 ` syzbot
2021-09-06 16:17 ` Jozsef Kadlecsik
2 siblings, 0 replies; 4+ messages in thread
From: Eric Dumazet @ 2021-09-03 23:56 UTC (permalink / raw)
To: syzbot, coreteam, davem, fw, kadlec, kuba, linux-kernel, netdev,
netfilter-devel, pablo, syzkaller-bugs
On 9/3/21 4:50 PM, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: a9c9a6f741cd Merge tag 'scsi-misc' of git://git.kernel.org..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13246f25300000
> kernel config: https://syzkaller.appspot.com/x/.config?x=7860a0536ececf0c
> dashboard link: https://syzkaller.appspot.com/bug?extid=3493b1873fb3ea827986
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11602f35300000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e8fbf5300000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+3493b1873fb3ea827986@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 8430 at mm/util.c:597 kvmalloc_node+0x111/0x120 mm/util.c:597
> Modules linked in:
> CPU: 1 PID: 8430 Comm: syz-executor792 Not tainted 5.14.0-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 8d 12 0d 00 49 89 c5 e9 69 ff ff ff e8 f0 21 d1 ff 41 89 ed 41 81 cd 00 20 01 00 eb 95 e8 df 21 d1 ff <0f> 0b e9 4c ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 e8 c6
> RSP: 0018:ffffc9000108f280 EFLAGS: 00010293
> RAX: 0000000000000000 RBX: ffffc9000108f3a0 RCX: 0000000000000000
> RDX: ffff88801bfd5580 RSI: ffffffff81a4f621 RDI: 0000000000000003
> RBP: 0000000000400dc0 R08: 000000007fffffff R09: 00000000ffffffff
> R10: ffffffff81a4f5de R11: 000000000000001f R12: 0000000200000018
> R13: 0000000000000000 R14: 00000000ffffffff R15: ffff888028b41a00
> FS: 0000000002409300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000020000006 CR3: 00000000127f1000 CR4: 0000000000350ee0
> Call Trace:
> hash_ip_create+0x4bb/0x13d0 net/netfilter/ipset/ip_set_hash_gen.h:1524
> ip_set_create+0x782/0x15a0 net/netfilter/ipset/ip_set_core.c:1100
> nfnetlink_rcv_msg+0xbc9/0x13f0 net/netfilter/nfnetlink.c:296
> netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
> nfnetlink_rcv+0x1ac/0x420 net/netfilter/nfnetlink.c:654
> netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
> netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
> netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
> 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: 0033:0x43f029
> Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffd662e8c48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043f029
> RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
> RBP: 0000000000403010 R08: 0000000000000005 R09: 0000000000400488
> R10: 0000000000000001 R11: 0000000000000246 R12: 00000000004030a0
> R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
>
>
> ---
> 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@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
>
As mentioned to Linus earlier, this bug comes after recent patch
commit 7661809d493b426e979f39ab512e3adf41fbcc69
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed Jul 14 09:45:49 2021 -0700
mm: don't allow oversized kvmalloc() calls
'kvmalloc()' is a convenience function for people who want to do a
kmalloc() but fall back on vmalloc() if there aren't enough physically
contiguous pages, or if the allocation is larger than what kmalloc()
supports.
However, let's make sure it doesn't get _too_ easy to do crazy things
with it. In particular, don't allow big allocations that could be due
to integer overflow or underflow. So make sure the allocation size fits
in an 'int', to protect against trivial integer conversion issues.
Acked-by: Willy Tarreau <w@1wt.eu>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] WARNING: kmalloc bug in hash_ip_create
2021-09-03 23:50 [syzbot] WARNING: kmalloc bug in hash_ip_create syzbot
2021-09-03 23:56 ` Eric Dumazet
@ 2021-09-05 23:21 ` syzbot
2021-09-06 16:17 ` Jozsef Kadlecsik
2 siblings, 0 replies; 4+ messages in thread
From: syzbot @ 2021-09-05 23:21 UTC (permalink / raw)
To: axboe, chaitanya.kulkarni, coreteam, davem, eric.dumazet, fw,
hch, ira.weiny, johan.hedberg, kadlec, kuba, linux-bluetooth,
linux-kernel, luiz.dentz, marcel, martin.petersen, netdev,
netfilter-devel, pablo, syzkaller-bugs
syzbot has bisected this issue to:
commit e6e7471706dc42cbe0e01278540c0730138d43e5
Author: Christoph Hellwig <hch@lst.de>
Date: Tue Jul 27 05:56:34 2021 +0000
bvec: add a bvec_kmap_local helper
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17468471300000
start commit: a9c9a6f741cd Merge tag 'scsi-misc' of git://git.kernel.org..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=14c68471300000
console output: https://syzkaller.appspot.com/x/log.txt?x=10c68471300000
kernel config: https://syzkaller.appspot.com/x/.config?x=7860a0536ececf0c
dashboard link: https://syzkaller.appspot.com/bug?extid=3493b1873fb3ea827986
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11602f35300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e8fbf5300000
Reported-by: syzbot+3493b1873fb3ea827986@syzkaller.appspotmail.com
Fixes: e6e7471706dc ("bvec: add a bvec_kmap_local helper")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] WARNING: kmalloc bug in hash_ip_create
2021-09-03 23:50 [syzbot] WARNING: kmalloc bug in hash_ip_create syzbot
2021-09-03 23:56 ` Eric Dumazet
2021-09-05 23:21 ` syzbot
@ 2021-09-06 16:17 ` Jozsef Kadlecsik
2 siblings, 0 replies; 4+ messages in thread
From: Jozsef Kadlecsik @ 2021-09-06 16:17 UTC (permalink / raw)
To: syzbot
Cc: coreteam, David Miller, Florian Westphal, kuba, linux-kernel,
netdev, netfilter-devel, Pablo Neira Ayuso, syzkaller-bugs
Hi Pablo,
I'm going to send the patch which fixes the issue together with the other
ones in the same bunch.
Best regards,
Jozsef
On Fri, 3 Sep 2021, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: a9c9a6f741cd Merge tag 'scsi-misc' of git://git.kernel.org..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13246f25300000
> kernel config: https://syzkaller.appspot.com/x/.config?x=7860a0536ececf0c
> dashboard link: https://syzkaller.appspot.com/bug?extid=3493b1873fb3ea827986
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11602f35300000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e8fbf5300000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+3493b1873fb3ea827986@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 1 PID: 8430 at mm/util.c:597 kvmalloc_node+0x111/0x120 mm/util.c:597
> Modules linked in:
> CPU: 1 PID: 8430 Comm: syz-executor792 Not tainted 5.14.0-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 8d 12 0d 00 49 89 c5 e9 69 ff ff ff e8 f0 21 d1 ff 41 89 ed 41 81 cd 00 20 01 00 eb 95 e8 df 21 d1 ff <0f> 0b e9 4c ff ff ff 0f 1f 84 00 00 00 00 00 55 48 89 fd 53 e8 c6
> RSP: 0018:ffffc9000108f280 EFLAGS: 00010293
> RAX: 0000000000000000 RBX: ffffc9000108f3a0 RCX: 0000000000000000
> RDX: ffff88801bfd5580 RSI: ffffffff81a4f621 RDI: 0000000000000003
> RBP: 0000000000400dc0 R08: 000000007fffffff R09: 00000000ffffffff
> R10: ffffffff81a4f5de R11: 000000000000001f R12: 0000000200000018
> R13: 0000000000000000 R14: 00000000ffffffff R15: ffff888028b41a00
> FS: 0000000002409300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000020000006 CR3: 00000000127f1000 CR4: 0000000000350ee0
> Call Trace:
> hash_ip_create+0x4bb/0x13d0 net/netfilter/ipset/ip_set_hash_gen.h:1524
> ip_set_create+0x782/0x15a0 net/netfilter/ipset/ip_set_core.c:1100
> nfnetlink_rcv_msg+0xbc9/0x13f0 net/netfilter/nfnetlink.c:296
> netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
> nfnetlink_rcv+0x1ac/0x420 net/netfilter/nfnetlink.c:654
> netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
> netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
> netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
> 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: 0033:0x43f029
> Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffd662e8c48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043f029
> RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003
> RBP: 0000000000403010 R08: 0000000000000005 R09: 0000000000400488
> R10: 0000000000000001 R11: 0000000000000246 R12: 00000000004030a0
> R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
>
>
> ---
> 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@googlegroups.com.
>
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
>
-
E-mail : kadlec@blackhole.kfki.hu, kadlecsik.jozsef@wigner.hu
PGP key : https://wigner.hu/~kadlec/pgp_public_key.txt
Address : Wigner Research Centre for Physics
H-1525 Budapest 114, POB. 49, Hungary
^ permalink raw reply [flat|nested] 4+ messages in thread