diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-02-02 10:41:51 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-02-02 10:41:51 +0100 |
| commit | 29eea45931f6ae094bb2be5c82d7ad6641dc1e65 (patch) | |
| tree | 3a67e2d0f4fb8403f0e88aa7fb690e0dd59a4a4f /sys/src/9/port/fault.c | |
| parent | 0b95485db79d3033cacd42038f0cf575e430e066 (diff) | |
kernel: do not pass user address of fd[2] array to newfd2()
access to user memory can pagefault and newfd2() holds
fgrp spinlock while writing to it. make temporary copy
on the stack in syspipe().
Diffstat (limited to 'sys/src/9/port/fault.c')
| -rw-r--r-- | sys/src/9/port/fault.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/src/9/port/fault.c b/sys/src/9/port/fault.c index 55a739bc3..9b2d05392 100644 --- a/sys/src/9/port/fault.c +++ b/sys/src/9/port/fault.c @@ -14,8 +14,11 @@ fault(uintptr addr, int read) if(up == nil) panic("fault: nil up"); - if(up->nlocks.ref) - print("fault: nlocks %ld\n", up->nlocks.ref); + if(up->nlocks.ref){ + Lock *l = up->lastlock; + print("fault: nlocks %ld, proc %lud %s, addr %#p, lock %#p, lpc %#p\n", + up->nlocks.ref, up->pid, up->text, addr, l, l ? l->pc : 0); + } pnd = up->notepending; sps = up->psstate; |