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OpenPGP: 3AB05486C7752FE1
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Jarkko Sakkinen
jarkko
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Jarkko Sakkinen
jarkkohttps://web.git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git/commit/?h=keys-graveyard
If this would work out then possibly also radiate to /proc/keys.
I.e. it could also similarly "knock for reference" but that is not within scope of this patch.
#linux #kernel #keyring
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@anneroth Danke
30 tips zu mach dich digital unabhängig von @kuketzblog
Link https://www.kuketz-blog.de/unplugtrump-mach-dich-digital-unabhaengig-von-trump-und-big-tech/
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Lars Wirzenius
liw@toot.liw.fiMy fourth Obnam 3 development session. Put into place the scaffolding to add chunk encryption, but didn't have the time to actually implement the encryption.
Small steps and tea is the way to reach goals while having fun.
(Obnam 3 is my Sunday project to experiment with implementing fundamental components for backup software.)
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vitaut 🤍❤️🤍 🇺🇦
vitaut@mastodon.socialBREAKING: The C++ committee imposes tariffs on non-US locales.
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Jarkko Sakkinen
jarkkoQuite cool, I have to say. fwupdmgr managed to update my HP USB-C Dock G5.
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Jarkko Sakkinen
jarkko
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Jann Horn
jann@infosec.exchangefun Linux fact: because MAP_SHARED|MAP_ANONYMOUS is actually a file-backed mapping under the hood, unmapping part of such a mapping does not discard the data stored in that part:
$ cat mremap.c
#define _GNU_SOURCE
#include <err.h>
#include <stdio.h>
#include <sys/mman.h>
int main(void) {
char *p = mmap(NULL, 0x2000, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
if (p == MAP_FAILED) err(1, "mmap");
p[0x1000] = 'X';
if (munmap(p+0x1000, 0x1000)) err(1, "munmap");
// that 'X' we just wrote... is it gone?
// nope, let's bring it back!
p = mremap(p, 0x1000, 0x2000, MREMAP_MAYMOVE);
if (p == MAP_FAILED) err(1, "mremap");
printf("p[0x1000]='%c'\n", p[0x1000]);
}
$ gcc -o mremap mremap.c
$ ./mremap
p[0x1000]='X'
$
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Or like, you have memory with identity (UID/PID vs serial). And in a memory reclaimer isolation is afaik more like when you pick passive victims. Here the list is a dead ramp, nothing comes back alive.
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