[Bug 1900773] Re: Timeout downloading initrd
Łukasz Zemczak
1900773 at bugs.launchpad.net
Mon Nov 16 13:41:01 UTC 2020
Hello dann, or anyone else affected,
Accepted grub2 into groovy-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/grub2/2.04-1ubuntu35.1
in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed. Your feedback will aid us getting this
update out to other Ubuntu users.
If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
groovy to verification-done-groovy. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-groovy. In either case, without details of your testing we will
not be able to proceed.
Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in
advance for helping!
N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.
** Changed in: grub2 (Ubuntu Groovy)
Status: Confirmed => Fix Committed
** Tags added: verification-needed verification-needed-groovy
** Changed in: grub2 (Ubuntu Focal)
Status: Confirmed => Fix Committed
** Tags added: verification-needed-focal
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You received this bug notification because you are a member of Ubuntu
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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:
Fix Committed
Status in livecd-rootfs source package in Focal:
Invalid
Status in grub2 source package in Groovy:
Fix Committed
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
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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.
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