diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2019-08-27 06:16:20 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2019-08-27 06:16:20 +0200 |
| commit | d9fec3c70aebe9e9139429235b881bf5b32dbe41 (patch) | |
| tree | 1c5aadcecee46f50968a4fb1ada922886dca46d2 /sys/src/9/port/sysproc.c | |
| parent | d25ca13ed8acdf609329055ef9c36d0f3fae9503 (diff) | |
kernel: prohibit changing cache attributes (SG_CACHED|SG_DEVICE) in segattach(), set SG_RONLY in data2txt()
the user should not be able to change the cache
attributes for a segment in segattach() as this
can cause the same memory to be mapped with
conflicting attributes in the cache.
SG_TEXT should always be mapped with SG_RONLY
attribute. so fix data2txt() to follow the rules.
Diffstat (limited to 'sys/src/9/port/sysproc.c')
| -rw-r--r-- | sys/src/9/port/sysproc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/9/port/sysproc.c b/sys/src/9/port/sysproc.c index 259b2d891..5361429c4 100644 --- a/sys/src/9/port/sysproc.c +++ b/sys/src/9/port/sysproc.c @@ -512,7 +512,7 @@ sysexec(va_list list) /* Text. Shared. Attaches to cache image if possible */ /* attachimage returns a locked cache image */ - img = attachimage(SG_TEXT|SG_RONLY, tc, UTZERO, (t-UTZERO)>>PGSHIFT); + img = attachimage(SG_TEXT | SG_RONLY, tc, UTZERO, (t-UTZERO)>>PGSHIFT); ts = img->s; up->seg[TSEG] = ts; ts->flushme = 1; |