[Bug 1900773] Re: Timeout downloading initrd
dann frazier
1900773 at bugs.launchpad.net
Fri Nov 13 21:32:01 UTC 2020
** Description changed:
[Impact]
- GRUB times out when downloading downloading large files w/ tftp. This notably breaks subiquity based PXE installations on several arm64 platforms (but presumably not limited to arm64).
+ GRUB times out when downloading downloading large files w/ tftp. This notably breaks subiquity based PXE installs which feature a large initrd. (Observed on several arm64 platforms, though the symptom is not arch-specific).
+
+ [Test Case]
+ Simple test case using an x86 UEFI VM:
+ Place a kernel/ramdisk on a tftp server. Inflate the initrd or kernel to 87M, e.g.:
+
+ dd if=/dev/zero of=initrd.img bs=1M count=87
+ dd if=initrd.img.orig of=initrd.img conv=notrunc
+
+ Success looks like:
+ Shell> fs0:
+ FS0:\> \efi\grubnetx64.efi
+ grub> net_dhcp efinet0
+ grub> linux (tftp,192.168.122.1)/vmlinuz.orig console=ttyS0,115200n8
+ grub> initrd (tftp,192.168.122.1)/initrd.img
+ grub>
+
+ Failure looks like:
+
+ grub> net_dhcp efinet0
+ grub> linux (tftp,192.168.122.1)/vmlinuz.orig console=ttyS0,115200n8
+ grub> initrd (tftp,192.168.122.1)/initrd.img
+ !!!! X64 Exception Type - 06(#UD - Invalid Opcode) CPU Apic ID - 00000000 !!!!
+ RIP - 0000000000099080, CS - 0000000000000038, RFLAGS - 0000000000010286
+ RAX - 000000007DC2FF00, RCX - 000000004FF99013, RDX - 000000007BF4CCF4
+ RBX - 000000007BE43FC0, RSP - 000000007FF25AE8, RBP - 000000007BE3C2A0
+ RSI - 000000000000000B, RDI - 000000007BE3C340
+ R8 - 000000007DC21168, R9 - 000000007DC1D4AE, R10 - 0000000000000067
+ R11 - 0000000000000002, R12 - 000000007BE3CCA0, R13 - 000000007BE3C260
+ R14 - 0000000000020004, R15 - 000000007DC1A613
+ DS - 0000000000000030, ES - 0000000000000030, FS - 0000000000000030
+ GS - 0000000000000030, SS - 0000000000000030
+ CR0 - 0000000080010033, CR2 - 0000000000000000, CR3 - 000000007FC01000
+ CR4 - 0000000000000668, CR8 - 0000000000000000
+ DR0 - 0000000000000000, DR1 - 0000000000000000, DR2 - 0000000000000000
+ DR3 - 0000000000000000, DR6 - 00000000FFFF0FF0, DR7 - 0000000000000400
+ GDTR - 000000007F9EE698 0000000000000047, LDTR - 0000000000000000
+ IDTR - 000000007F4B2018 0000000000000FFF, TR - 0000000000000000
+ FXSAVE_STATE - 000000007FF25740
+ !!!! Can't find image information. !!!!
- [Test Case]
- This can be reproduced on a Cavium ThunderX CRB system using subiquity from the groovy arm64 ISO. Failure looks like:
+ This was originally discovered on a Cavium ThunderX CRB system using subiquity from the groovy arm64 ISO. Failure there looks like:
GNU GRUB version 2.04
����������������������������������������������������������������������������Ŀ
�*Ubuntu Server �
� �
� �
� �
� �
� �
� �
� �
� �
� �
� �
� �
� �
������������������������������������������������������������������������������
Use the and keys to select which entry is highlighted.
Press enter to boot the selected OS, `e' to edit the commands
before booting or `c' for a command-line.
error: timeout reading `initrd'.
Press any key to continue...
[Fix]
https://git.savannah.gnu.org/cgit/grub.git/commit/?id=a6838bbc6726ad624bd2b94991f690b8e9d23c69
[Where problems could occur]
The fix is to the tftp command, so problems would like appear in the tftp stack, possibly due to inconsistencies between tftp server implementations.
--
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to livecd-rootfs in Ubuntu.
https://bugs.launchpad.net/bugs/1900773
Title:
Timeout downloading initrd
Status in Release Notes for Ubuntu:
New
Status in grub2 package in Ubuntu:
In Progress
Status in livecd-rootfs package in Ubuntu:
Invalid
Status in grub2 source package in Focal:
Confirmed
Status in livecd-rootfs source package in Focal:
Invalid
Status in grub2 source package in Groovy:
Confirmed
Status in livecd-rootfs source package in Groovy:
Invalid
Status in grub2 source package in Hirsute:
In Progress
Status in livecd-rootfs source package in Hirsute:
Invalid
Bug description:
[Impact]
GRUB times out when downloading downloading large files w/ tftp. This notably breaks subiquity based PXE installs which feature a large initrd. (Observed on several arm64 platforms, though the symptom is not arch-specific).
[Test Case]
Simple test case using an x86 UEFI VM:
Place a kernel/ramdisk on a tftp server. Inflate the initrd or kernel to 87M, e.g.:
dd if=/dev/zero of=initrd.img bs=1M count=87
dd if=initrd.img.orig of=initrd.img conv=notrunc
Success looks like:
Shell> fs0:
FS0:\> \efi\grubnetx64.efi
grub> net_dhcp efinet0
grub> linux (tftp,192.168.122.1)/vmlinuz.orig console=ttyS0,115200n8
grub> initrd (tftp,192.168.122.1)/initrd.img
grub>
Failure looks like:
grub> net_dhcp efinet0
grub> linux (tftp,192.168.122.1)/vmlinuz.orig console=ttyS0,115200n8
grub> initrd (tftp,192.168.122.1)/initrd.img
!!!! X64 Exception Type - 06(#UD - Invalid Opcode) CPU Apic ID - 00000000 !!!!
RIP - 0000000000099080, CS - 0000000000000038, RFLAGS - 0000000000010286
RAX - 000000007DC2FF00, RCX - 000000004FF99013, RDX - 000000007BF4CCF4
RBX - 000000007BE43FC0, RSP - 000000007FF25AE8, RBP - 000000007BE3C2A0
RSI - 000000000000000B, RDI - 000000007BE3C340
R8 - 000000007DC21168, R9 - 000000007DC1D4AE, R10 - 0000000000000067
R11 - 0000000000000002, R12 - 000000007BE3CCA0, R13 - 000000007BE3C260
R14 - 0000000000020004, R15 - 000000007DC1A613
DS - 0000000000000030, ES - 0000000000000030, FS - 0000000000000030
GS - 0000000000000030, SS - 0000000000000030
CR0 - 0000000080010033, CR2 - 0000000000000000, CR3 - 000000007FC01000
CR4 - 0000000000000668, CR8 - 0000000000000000
DR0 - 0000000000000000, DR1 - 0000000000000000, DR2 - 0000000000000000
DR3 - 0000000000000000, DR6 - 00000000FFFF0FF0, DR7 - 0000000000000400
GDTR - 000000007F9EE698 0000000000000047, LDTR - 0000000000000000
IDTR - 000000007F4B2018 0000000000000FFF, TR - 0000000000000000
FXSAVE_STATE - 000000007FF25740
!!!! Can't find image information. !!!!
This was originally discovered on a Cavium ThunderX CRB system using subiquity from the groovy arm64 ISO. Failure there looks like:
GNU GRUB version 2.04
����������������������������������������������������������������������������Ŀ
�*Ubuntu Server �
� �
� �
� �
� �
� �
� �
� �
� �
� �
� �
� �
� �
������������������������������������������������������������������������������
Use the and keys to select which entry is highlighted.
Press enter to boot the selected OS, `e' to edit the commands
before booting or `c' for a command-line.
error: timeout reading `initrd'.
Press any key to continue...
[Fix]
https://git.savannah.gnu.org/cgit/grub.git/commit/?id=a6838bbc6726ad624bd2b94991f690b8e9d23c69
[Where problems could occur]
The fix is to the tftp command, so problems would like appear in the tftp stack, possibly due to inconsistencies between tftp server implementations.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-release-notes/+bug/1900773/+subscriptions
More information about the foundations-bugs
mailing list