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devproc: make sure writewatchpt() doesnt overflow the watchpoint array

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the user buffer could be changed while we parse it resulting
in a different number of watchpoints than initially calculated.
so add a check to the parse loop so we wont overflow the
watchpoint array.
This commit is contained in:
cinap_lenrek 2020-02-28 16:48:42 +01:00
parent adb36de077
commit 17a92f3995
1 changed files with 1 additions and 1 deletions
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2
sys/src/9/port/devproc.c
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@ -812,7 +812,7 @@ writewatchpt(Proc *pr, char *buf, int nbuf, uvlong offset)
}
if(nwp0 > 0)
memmove(wp, pr->watchpt, sizeof(Watchpt) * nwp0);
for(wq = wp + nwp0;;){
for(wq = wp + nwp0; wq < wp + nwp0+nwp;){
q = memchr(p, '\n', e - p);
if(q == nil)
break;