Re: [Bridge] BUG: unable to handle kernel paging request in compat_copy_entries
On Mon, Mar 05, 2018 at 04:18:00PM +0100, Paolo Abeni wrote:
> On Mon, 2018-03-05 at 00:21 -0800, syzbot wrote:
> > Hello,
> >
> > syzbot hit the following crash on upstream commit
> > 5fbdefcf685defd8bc5a8f37b17538d25c58d77a (Fri Mar 2 21:05:20 2018 +)
> > Merge branch 'parisc-4.16-1' of
> > git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
> >
> > So far this crash happened 5 times on upstream.
> > syzkaller reproducer is attached.
> > Raw console output is attached.
> > compiler: gcc (GCC) 7.1.1 20170620
> > .config is attached.
> > user-space arch: i386
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+5705ba91388d7bc30...@syzkaller.appspotmail.com
> > It will help syzbot understand when the bug is fixed. See footer for
> > details.
> > If you forward the report, please keep this part and the footer.
> >
> > audit: type=1400 audit(1520098078.492:8): avc: denied { map } for
> > pid=4239 comm="syz-execprog" path="/root/syzkaller-shm255959590" dev="sda1"
> >
> > ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
> > tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1
> > IPVS: ftp: loaded support on port[0] = 21
> > BUG: unable to handle kernel paging request at c90001819e4f
> > IP: ebt_size_mwt net/bridge/netfilter/ebtables.c:2037 [inline]
> > IP: size_entry_mwt net/bridge/netfilter/ebtables.c:2122 [inline]
> > IP: compat_copy_entries+0x49f/0x1050 net/bridge/netfilter/ebtables.c:2160
> > PGD 1dad2f067 P4D 1dad2f067 PUD 1dad30067 PMD 1b2408067 PTE 0
> > Oops: [#1] SMP KASAN
> > Dumping ftrace buffer:
> > (ftrace buffer empty)
> > Modules linked in:
> > CPU: 1 PID: 4249 Comm: syz-executor0 Not tainted 4.16.0-rc3+ #248
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 01/01/2011
> > RIP: 0010:ebt_size_mwt net/bridge/netfilter/ebtables.c:2037 [inline]
> > RIP: 0010:size_entry_mwt net/bridge/netfilter/ebtables.c:2122 [inline]
> > RIP: 0010:compat_copy_entries+0x49f/0x1050
> > net/bridge/netfilter/ebtables.c:2160
> > RSP: 0018:8801b34bf7e8 EFLAGS: 00010246
> > RAX: 000a RBX: 8801b34bf9d4 RCX: c90001819e4f
> > RDX: RSI: RDI: 8801b34bf9d8
> > RBP: 8801b34bf968 R08: R09:
> > R10: 88613340 R11: 0001 R12: ee5f
> > R13: dc00 R14: 8801b34bf9c8 R15: c90001819e2f
> > FS: () GS:8801db30(0063) knlGS:085b9900
> > CS: 0010 DS: 002b ES: 002b CR0: 80050033
> > CR2: c90001819e4f CR3: 0001b2bd7003 CR4: 001606e0
> > DR0: DR1: DR2:
> > DR3: DR6: fffe0ff0 DR7: 0400
> > Call Trace:
> > compat_do_replace+0x398/0x7c0 net/bridge/netfilter/ebtables.c:2249
> > compat_do_ebt_set_ctl+0x22a/0x2d0 net/bridge/netfilter/ebtables.c:2330
> > compat_nf_sockopt net/netfilter/nf_sockopt.c:144 [inline]
> > compat_nf_setsockopt+0x88/0x130 net/netfilter/nf_sockopt.c:156
> > compat_ip_setsockopt+0x8b/0xd0 net/ipv4/ip_sockglue.c:1285
> > inet_csk_compat_setsockopt+0x95/0x120 net/ipv4/inet_connection_sock.c:1041
> > compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2916
> > compat_sock_common_setsockopt+0xb2/0x140 net/core/sock.c:2986
> > C_SYSC_setsockopt net/compat.c:403 [inline]
> > compat_SyS_setsockopt+0x17c/0x410 net/compat.c:386
> > do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
> > do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392
> > entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
> > RIP: 0023:0xf7fbbc99
> > RSP: 002b:ffd5ab8c EFLAGS: 0286 ORIG_RAX: 016e
> > RAX: ffda RBX: 0003 RCX:
> > RDX: 0080 RSI: 2280 RDI: 0208
> > RBP: R08: R09:
> > R10: R11: R12:
> > R13: R14: R15:
> > Code: 8d 4f 20 48 89 c8 48 89 8d c8 fe ff ff 48 c1 e8 03 42 0f b6 14 28 48
> > 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b2 0a 00 00 <45> 8b 67 20
> > 44 39 a5 04 ff ff ff 0f 82 bd 08 00 00 e8 cb 52 56
> > RIP: ebt_size_mwt net/bridge/netfilter/ebtables.c:2037 [inline] RSP:
> > 8801b34bf7e8
> > RIP: size_entry_mwt net/bridge/netfilter/ebtables.c:2122 [inline] RSP:
> > 8801b34bf7e8
> > RIP: compat_copy_entries+0x49f/0x1050 net/bridge/netfilter/ebtables.c:2160
> > RSP: 8801b34bf7e8
> > CR2: c90001819e4f
> > ---[ end trace cf111332eb971f16 ]---
> >
> >
> > ---
> > This bug is generated by a dumb bot. It may contain errors.
> > See https://goo.gl/tpsmEJ for details.
> > Direct all questions to syzkal...@googlegroups.com.
> >
> > syzbot will keep track of
Re: [Bridge] BUG: unable to handle kernel paging request in compat_copy_entries
On Mon, 2018-03-05 at 00:21 -0800, syzbot wrote:
> Hello,
>
> syzbot hit the following crash on upstream commit
> 5fbdefcf685defd8bc5a8f37b17538d25c58d77a (Fri Mar 2 21:05:20 2018 +)
> Merge branch 'parisc-4.16-1' of
> git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
>
> So far this crash happened 5 times on upstream.
> syzkaller reproducer is attached.
> Raw console output is attached.
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached.
> user-space arch: i386
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+5705ba91388d7bc30...@syzkaller.appspotmail.com
> It will help syzbot understand when the bug is fixed. See footer for
> details.
> If you forward the report, please keep this part and the footer.
>
> audit: type=1400 audit(1520098078.492:8): avc: denied { map } for
> pid=4239 comm="syz-execprog" path="/root/syzkaller-shm255959590" dev="sda1"
> ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
> tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1
> IPVS: ftp: loaded support on port[0] = 21
> BUG: unable to handle kernel paging request at c90001819e4f
> IP: ebt_size_mwt net/bridge/netfilter/ebtables.c:2037 [inline]
> IP: size_entry_mwt net/bridge/netfilter/ebtables.c:2122 [inline]
> IP: compat_copy_entries+0x49f/0x1050 net/bridge/netfilter/ebtables.c:2160
> PGD 1dad2f067 P4D 1dad2f067 PUD 1dad30067 PMD 1b2408067 PTE 0
> Oops: [#1] SMP KASAN
> Dumping ftrace buffer:
> (ftrace buffer empty)
> Modules linked in:
> CPU: 1 PID: 4249 Comm: syz-executor0 Not tainted 4.16.0-rc3+ #248
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> RIP: 0010:ebt_size_mwt net/bridge/netfilter/ebtables.c:2037 [inline]
> RIP: 0010:size_entry_mwt net/bridge/netfilter/ebtables.c:2122 [inline]
> RIP: 0010:compat_copy_entries+0x49f/0x1050
> net/bridge/netfilter/ebtables.c:2160
> RSP: 0018:8801b34bf7e8 EFLAGS: 00010246
> RAX: 000a RBX: 8801b34bf9d4 RCX: c90001819e4f
> RDX: RSI: RDI: 8801b34bf9d8
> RBP: 8801b34bf968 R08: R09:
> R10: 88613340 R11: 0001 R12: ee5f
> R13: dc00 R14: 8801b34bf9c8 R15: c90001819e2f
> FS: () GS:8801db30(0063) knlGS:085b9900
> CS: 0010 DS: 002b ES: 002b CR0: 80050033
> CR2: c90001819e4f CR3: 0001b2bd7003 CR4: 001606e0
> DR0: DR1: DR2:
> DR3: DR6: fffe0ff0 DR7: 0400
> Call Trace:
> compat_do_replace+0x398/0x7c0 net/bridge/netfilter/ebtables.c:2249
> compat_do_ebt_set_ctl+0x22a/0x2d0 net/bridge/netfilter/ebtables.c:2330
> compat_nf_sockopt net/netfilter/nf_sockopt.c:144 [inline]
> compat_nf_setsockopt+0x88/0x130 net/netfilter/nf_sockopt.c:156
> compat_ip_setsockopt+0x8b/0xd0 net/ipv4/ip_sockglue.c:1285
> inet_csk_compat_setsockopt+0x95/0x120 net/ipv4/inet_connection_sock.c:1041
> compat_tcp_setsockopt+0x3d/0x70 net/ipv4/tcp.c:2916
> compat_sock_common_setsockopt+0xb2/0x140 net/core/sock.c:2986
> C_SYSC_setsockopt net/compat.c:403 [inline]
> compat_SyS_setsockopt+0x17c/0x410 net/compat.c:386
> do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
> do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392
> entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
> RIP: 0023:0xf7fbbc99
> RSP: 002b:ffd5ab8c EFLAGS: 0286 ORIG_RAX: 016e
> RAX: ffda RBX: 0003 RCX:
> RDX: 0080 RSI: 2280 RDI: 0208
> RBP: R08: R09:
> R10: R11: R12:
> R13: R14: R15:
> Code: 8d 4f 20 48 89 c8 48 89 8d c8 fe ff ff 48 c1 e8 03 42 0f b6 14 28 48
> 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b2 0a 00 00 <45> 8b 67 20
> 44 39 a5 04 ff ff ff 0f 82 bd 08 00 00 e8 cb 52 56
> RIP: ebt_size_mwt net/bridge/netfilter/ebtables.c:2037 [inline] RSP:
> 8801b34bf7e8
> RIP: size_entry_mwt net/bridge/netfilter/ebtables.c:2122 [inline] RSP:
> 8801b34bf7e8
> RIP: compat_copy_entries+0x49f/0x1050 net/bridge/netfilter/ebtables.c:2160
> RSP: 8801b34bf7e8
> CR2: c90001819e4f
> ---[ end trace cf111332eb971f16 ]---
>
>
> ---
> This bug is generated by a dumb bot. It may contain errors.
> See https://goo.gl/tpsmEJ for details.
> Direct all questions to syzkal...@googlegroups.com.
>
> syzbot will keep track of this bug report.
> If you forgot to add the Reported-by tag, once the fix for this bug is
> merged
> into any tree, please reply to this email with:
> #syz fix: exact-commit-title
> If you want to test a patch for this bug, please reply with:
> #syz
