Date: Wed, 08 Apr 2020 23:10:10 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 245463] Driver sysctl tunables that use strings fail with error 14 Message-ID: <bug-245463-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245463 Bug ID: 245463 Summary: Driver sysctl tunables that use strings fail with error 14 Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: jeffrey.e.pieper@intel.com When changing driver tunables that use strings with kenv, they fail with error 14. For example Intel drivers rx/tx descriptor tunables fail with: Setting sysctl dev.ixl.0.iflib.override_ntxds failed: 14 Setting sysctl dev.ixl.0.iflib.override_nrxds failed: 14 More than likely this is caused by https://reviews.freebsd.org/D23378. This patch has made changes to the sysctl_handle_string() function. The copyin() function is now used to copy bytes from user space to kernel space. The problem is that the tunables are already located in the kernel space (kenv). It turns out that changing string parameters using sysctl works well, but if you set string parameters from kenv, the copyin() function fails with error 14. -- You are receiving this mail because: You are the assignee for the bug.help
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