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SubjectRe: [PATCH v4] mm/hugetlb: fix a addressing exception caused by huge_pte_offset
On Sat, Mar 28, 2020 at 07:41:22AM +0800, Longpeng(Mike) wrote:
> From: Longpeng <longpeng2@huawei.com>
>
> Our machine encountered a panic(addressing exception) after run
> for a long time and the calltrace is:
> RIP: 0010:[<ffffffff9dff0587>] [<ffffffff9dff0587>] hugetlb_fault+0x307/0xbe0
> RSP: 0018:ffff9567fc27f808 EFLAGS: 00010286
> RAX: e800c03ff1258d48 RBX: ffffd3bb003b69c0 RCX: e800c03ff1258d48
> RDX: 17ff3fc00eda72b7 RSI: 00003ffffffff000 RDI: e800c03ff1258d48
> RBP: ffff9567fc27f8c8 R08: e800c03ff1258d48 R09: 0000000000000080
> R10: ffffaba0704c22a8 R11: 0000000000000001 R12: ffff95c87b4b60d8
> R13: 00005fff00000000 R14: 0000000000000000 R15: ffff9567face8074
> FS: 00007fe2d9ffb700(0000) GS:ffff956900e40000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffd3bb003b69c0 CR3: 000000be67374000 CR4: 00000000003627e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> [<ffffffff9df9b71b>] ? unlock_page+0x2b/0x30
> [<ffffffff9dff04a2>] ? hugetlb_fault+0x222/0xbe0
> [<ffffffff9dff1405>] follow_hugetlb_page+0x175/0x540
> [<ffffffff9e15b825>] ? cpumask_next_and+0x35/0x50
> [<ffffffff9dfc7230>] __get_user_pages+0x2a0/0x7e0
> [<ffffffff9dfc648d>] __get_user_pages_unlocked+0x15d/0x210
> [<ffffffffc068cfc5>] __gfn_to_pfn_memslot+0x3c5/0x460 [kvm]
> [<ffffffffc06b28be>] try_async_pf+0x6e/0x2a0 [kvm]
> [<ffffffffc06b4b41>] tdp_page_fault+0x151/0x2d0 [kvm]
> ...
> [<ffffffffc06a6f90>] kvm_arch_vcpu_ioctl_run+0x330/0x490 [kvm]
> [<ffffffffc068d919>] kvm_vcpu_ioctl+0x309/0x6d0 [kvm]
> [<ffffffff9deaa8c2>] ? dequeue_signal+0x32/0x180
> [<ffffffff9deae34d>] ? do_sigtimedwait+0xcd/0x230
> [<ffffffff9e03aed0>] do_vfs_ioctl+0x3f0/0x540
> [<ffffffff9e03b0c1>] SyS_ioctl+0xa1/0xc0
> [<ffffffff9e53879b>] system_call_fastpath+0x22/0x27

> Cc: Mike Kravetz <mike.kravetz@oracle.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Jason Gunthorpe <jgg@ziepe.ca>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: Sean Christopherson <sean.j.christopherson@intel.com>
> Cc: stable@vger.kernel.org
> Suggested-by: Jason Gunthorpe <jgg@ziepe.ca>
> Signed-off-by: Longpeng <longpeng2@huawei.com>

Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>

Jason

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