bugGNU GRUB - Bugs: bug #58283, save_env prepends \0 to grubenv,...

 
 

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bug #58283: save_env prepends \0 to grubenv, causing "error: invalid environment block."

Submitted by:  Clara Short <clarity>
Submitted on:  Fri 01 May 2020 02:37:36 PM UTC  
 
Category:  None Severity:  Major
Priority:  5 - Normal Item Group:  Software Error
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  Clara Short
Open/Closed:  Open Release: 
Release:  2.02 Reproducibility:  Every Time
Planned Release:  None

Fri 01 May 2020 02:37:36 PM UTC, original submission:  

Configuration

grub> echo $package_version $grub_cpu $grub_platform
2.02-2ubuntu8.15 i386 pc

Steps to reproduce

1. Initial conditions

# rm /boot/grub/grubenv
# grub-editenv - create
# grub-editenv - set foo=bar
# grub-editenv - list
foo=bar
# hexdump -C /boot/grub/grubenv
00000000  23 20 47 52 55 42 20 45  6e 76 69 72 6f 6e 6d 65  |# GRUB Environme|
00000010  6e 74 20 42 6c 6f 63 6b  0a 66 6f 6f 3d 62 61 72  |nt Block.foo=bar|
00000020  0a 23 23 23 23 23 23 23  23 23 23 23 23 23 23 23  |.###############|
00000030  23 23 23 23 23 23 23 23  23 23 23 23 23 23 23 23  |################|
*
00000400
# reboot

2. Drop to GRUB shell

grub> list_env
foo=bar
grub> baz=quux
grub> save_env baz
grub> list_env
error: invalid environment block.
grub> reboot

3. Boot into Linux

$ grub-editenv - list
grub-editenv: error: invalid environment block.
$ hexdump -C /boot/grub/grubenv
00000000  00 23 20 47 52 55 42 20  45 6e 76 69 72 6f 6e 6d  |.# GRUB Environm|
00000010  65 6e 74 20 42 6c 6f 63  6b 0a 66 6f 6f 3d 62 61  |ent Block.foo=ba|
00000020  72 0a 62 61 7a 3d 71 75  75 78 0a 23 23 23 23 23  |r.baz=quux.#####|
00000030  23 23 23 23 23 23 23 23  23 23 23 23 23 23 23 23  |################|
*
00000400
$

Clara Short <clarity>

 

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Depends on the following items: None found

Items that depend on this one: None found

 

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