Messages in this thread | | | From | Doug Anderson <> | Date | Thu, 15 Feb 2024 09:38:47 -0800 | Subject | Re: [PATCH v2] arm64/sve: Lower the maximum allocation for the SVE ptrace regset |
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Hi,
On Thu, Feb 15, 2024 at 4:44 AM Will Deacon <will@kernel.org> wrote: > > On Tue, 13 Feb 2024 18:24:38 +0000, Mark Brown wrote: > > Doug Anderson observed that ChromeOS crashes are being reported which > > include failing allocations of order 7 during core dumps due to ptrace > > allocating storage for regsets: > > > > chrome: page allocation failure: order:7, > > mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), > > nodemask=(null),cpuset=urgent,mems_allowed=0 > > ... > > regset_get_alloc+0x1c/0x28 > > elf_core_dump+0x3d8/0xd8c > > do_coredump+0xeb8/0x1378 > > > > [...] > > Applied to arm64 (for-next/fixes), thanks! > > [1/1] arm64/sve: Lower the maximum allocation for the SVE ptrace regset > https://git.kernel.org/arm64/c/2813926261e4
Thanks!
A side note to anyone trying to backport this is that there's a hidden dependency of commit f171f9e4097d ("arm64/fp: Make SVE and SME length register definition match architecture"). Without that dependency then backporting ${SUBJECT} patch is just a no-op. ...backporting the hidden dependency ends up giving merge conflicts, so for the purposes of picking this to our 5.15 or earlier branches I went back to just making the #define be 16 again like it was in v1.
-Doug
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