syzbot


general protection fault in page_vma_mapped_walk (2)

Status: auto-closed as invalid on 2020/09/19 03:21
Reported-by: syzbot+06e92979d46082404a7b@syzkaller.appspotmail.com
First crash: 776d, last: 776d
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in page_vma_mapped_walk 1 230d 226d 0/22 auto-closed as invalid on 2022/01/17 20:48
linux-4.14 general protection fault in page_vma_mapped_walk 1 926d 926d 0/1 auto-closed as invalid on 2020/04/22 07:29
linux-4.19 general protection fault in page_vma_mapped_walk 2 231d 350d 0/1 auto-closed as invalid on 2022/03/18 08:11

Sample crash report:
kasan: GPF could be caused by NULL-ptr deref or user memory access
kvm [24623]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000004c data 0x6
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 1457 Comm: kswapd0 Not tainted 4.14.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a66ac080 task.stack: ffff8880a66a0000
kvm [24623]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000003b data 0xf6
RIP: 0010:page_vma_mapped_walk+0x4ef/0x1c80 mm/page_vma_mapped.c:171
RSP: 0018:ffff8880a66a7568 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff8880a66a7638 RCX: ffff8880a66a77b0
RDX: 00000000e0e0e000 RSI: ffff88808b30e108 RDI: ffff888000104710
RBP: 0000000707070000 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880a66ac930 R11: ffff8880a66ac080 R12: 0000000000790000
R13: 0000000000790000 R14: ffff8880a66a77f0 R15: ffffed1011661c2b
FS:  0000000000000000(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000078c000 CR3: 0000000097db4000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 page_referenced_one+0x174/0x490 mm/rmap.c:764
 rmap_walk_file+0x37c/0x8a0 mm/rmap.c:1829
 rmap_walk+0xe5/0x180 mm/rmap.c:1847
 page_referenced+0x392/0x450 mm/rmap.c:874
 shrink_active_list+0x34f/0xc80 mm/vmscan.c:2049
 shrink_list mm/vmscan.c:2173 [inline]
 shrink_node_memcg+0x873/0x12b0 mm/vmscan.c:2445
 shrink_node+0x2e0/0xb70 mm/vmscan.c:2637
 kswapd_shrink_node mm/vmscan.c:3299 [inline]
 balance_pgdat mm/vmscan.c:3405 [inline]
 kswapd+0x8ee/0x14a0 mm/vmscan.c:3623
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 50 12 00 00 48 8b 44 24 18 4c 89 e5 48 c1 ed 24 81 e5 f8 0f 00 00 48 03 68 50 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 29 12 00 00 48 8b 6d 00 40 f6 c5 01 75 08 45 
RIP: page_vma_mapped_walk+0x4ef/0x1c80 mm/page_vma_mapped.c:171 RSP: ffff8880a66a7568
---[ end trace 5773c0b826179a67 ]---

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/05/22 03:20 linux-4.14.y a41ba30d9df2 4afdfa20 .config log report