syzbot


general protection fault in __handle_mm_fault

Status: fixed on 2019/06/11 10:01
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+1577fbe983d20fe2e88f@syzkaller.appspotmail.com
Fix commit: ff09d7ec9786 mm/memory.c: recheck page table entry with page table lock held
First crash: 2082d, last: 2072d
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
general protection fault in __handle_mm_fault 7 (8) 2018/10/09 17:09

Sample crash report:
8021q: adding VLAN 0 to HW filter on device team0
IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6015 Comm: syz-executor196 Not tainted 4.19.0-rc6-next-20181004+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_fault mm/memory.c:3524 [inline]
RIP: 0010:handle_pte_fault mm/memory.c:3762 [inline]
RIP: 0010:__handle_mm_fault+0x2d72/0x55c0 mm/memory.c:3886
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 20 00 00 49 8b 9c 24 b0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 57 20 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de
RSP: 0018:ffff8801bbe66fc0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8160f791
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801bbe670f8
RBP: ffff8801bbe67270 R08: ffffed0039d485ae R09: ffffed0039d485ad
R10: ffffed0039d485ad R11: ffff8801cea42d6b R12: ffff8801bbe67248
R13: ffff8801bbc7e800 R14: ffff8801d1759f40 R15: 0000000000000067
FS:  0000000001c6a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020077000 CR3: 00000001d79be000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 handle_mm_fault+0x54f/0xc70 mm/memory.c:3923
 __do_page_fault+0x567/0xd10 arch/x86/mm/fault.c:1355
 do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1430
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83
RSP: 0018:ffff8801bbe675b8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000007a50 RCX: 0000000000001b40
RDX: 0000000000007a50 RSI: 0000000020077000 RDI: ffff8801ce615f10
RBP: ffff8801bbe675f0 R08: ffffed0039cc2f4a R09: ffffed0039cc2f4a
R10: ffffed0039cc2f49 R11: ffff8801ce617a4f R12: 0000000020078b40
R13: 00000000200710f0 R14: ffff8801ce610000 R15: 00007ffffffff000
 _copy_from_iter_full+0x263/0xc20 lib/iov_iter.c:724
 copy_from_iter_full include/linux/uio.h:124 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1951 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1977 [inline]
 tcp_sendmsg_locked+0x159e/0x3f90 net/ipv4/tcp.c:1338
 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1443
 inet_sendmsg+0x19c/0x690 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 __sys_sendto+0x3d7/0x670 net/socket.c:1789
 __do_sys_sendto net/socket.c:1801 [inline]
 __se_sys_sendto net/socket.c:1797 [inline]
 __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1797
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441159
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 db 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc1def2948 EFLAGS: 00000217 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441159
RDX: fffffffffffffee3 RSI: 0000000020000b40 RDI: 0000000000000003
RBP: 00000000006cc018 R08: 0000000000000000 R09: ffffffffffffff61
R10: 00000000040000cb R11: 0000000000000217 R12: 00000000004020c0
R13: 0000000000402150 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace d2b868b55677c602 ]---
RIP: 0010:do_fault mm/memory.c:3524 [inline]
RIP: 0010:handle_pte_fault mm/memory.c:3762 [inline]
RIP: 0010:__handle_mm_fault+0x2d72/0x55c0 mm/memory.c:3886
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 20 00 00 49 8b 9c 24 b0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 57 20 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de
RSP: 0018:ffff8801bbe66fc0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8160f791
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801bbe670f8
RBP: ffff8801bbe67270 R08: ffffed0039d485ae R09: ffffed0039d485ad
R10: ffffed0039d485ad R11: ffff8801cea42d6b R12: ffff8801bbe67248
R13: ffff8801bbc7e800 R14: ffff8801d1759f40 R15: 0000000000000067
FS:  0000000001c6a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020077000 CR3: 00000001d79be000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (17):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/10/04 23:49 linux-next 25bcda3e8b9f 8b311eaf .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/10/15 07:22 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/15 01:03 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/13 11:31 linux-next 774ea0551a29 caf12900 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/12 14:11 linux-next 774ea0551a29 ba6ddb43 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/12 00:24 linux-next 771b65e89c8a ba6ddb43 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/08 21:29 linux-next ae16eea39a86 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/08 14:39 linux-next ae16eea39a86 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/08 04:50 linux-next 12ffaa1197f5 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/08 01:48 linux-next 12ffaa1197f5 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/07 22:34 linux-next 12ffaa1197f5 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/07 18:30 linux-next 12ffaa1197f5 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/07 16:57 linux-next 12ffaa1197f5 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/06 18:09 linux-next 12ffaa1197f5 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/06 09:06 linux-next 12ffaa1197f5 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/05 02:30 linux-next 25bcda3e8b9f 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/04 23:20 linux-next 25bcda3e8b9f 8b311eaf .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.