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Date: Thu, 20 Oct 2022 17:06:45 +0200 From: Petr Vorel <pvorel@...e.cz> To: linux-kernel@...r.kernel.org Cc: Petr Vorel <pvorel@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Torsten Hilbrich <torsten.hilbrich@...unet.com> Subject: [PATCH 1/1] kernel/utsname_sysctl.c: Add missing enum uts_proc value bfca3dd3d068 added new struct ctl_table uts_kern_table[], but not new enum uts_proc value. It broke the notification mechanism between the sethostname syscall and the pollers of /proc/sys/kernel/hostname. The table uts_kern_table is addressed within uts_proc_notify by the enum value, that's why new enum value is needed. Fixes: bfca3dd3d068 ("kernel/utsname_sysctl.c: print kernel arch") Reported-by: Torsten Hilbrich <torsten.hilbrich@...unet.com> Signed-off-by: Petr Vorel <pvorel@...e.cz> --- Hi all, I'm sorry to introduce a regression. Torsten Hilbrich reported [1] that hostnamectl set-hostname foo which does poll() got affected by bfca3dd3d068. He also wrote a reproducer [2] which does not require systemd, I tested the patch on dracut initramfs. Kind regards, Petr [1] https://lore.kernel.org/lkml/0c2b92a6-0f25-9538-178f-eee3b06da23f@secunet.com/ [2] https://lore.kernel.org/lkml/ec9e00b9-8b47-7918-c39b-8b0069003169@secunet.com/2-hostname-poll-test.c include/linux/utsname.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/utsname.h b/include/linux/utsname.h index 2b1737c9b244..bf7613ba412b 100644 --- a/include/linux/utsname.h +++ b/include/linux/utsname.h @@ -10,6 +10,7 @@ #include <uapi/linux/utsname.h> enum uts_proc { + UTS_PROC_ARCH, UTS_PROC_OSTYPE, UTS_PROC_OSRELEASE, UTS_PROC_VERSION, -- 2.38.0
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