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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-10-01 17:35:01 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-10-01 19:33:20 +0200 |
| commit | b63dea5ca946c3956637a7bf85a1002866b20cd6 (patch) | |
| tree | 682eb89c30f95c85a4a2b158fcdfa867c2fa56c8 /i386 | |
| parent | 126c0364bf7d72d4f2ecf1ad2f4ebe1d2667940d (diff) | |
copyinmsg: Check that we have not overflown
This if of course too late in case of a failure, but better assert than get
awful bugs, and it's really not supposed to happen.
Diffstat (limited to 'i386')
| -rw-r--r-- | i386/i386/locore.S | 1 | ||||
| -rw-r--r-- | i386/i386/locore.h | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/i386/i386/locore.S b/i386/i386/locore.S index d3986793..846f5567 100644 --- a/i386/i386/locore.S +++ b/i386/i386/locore.S @@ -1335,6 +1335,7 @@ copyin_fail: * arg0: user address * arg1: kernel address * arg2: byte count - must be a multiple of four + * arg3: kernel byte count */ ENTRY(copyinmsg) pushl %esi diff --git a/i386/i386/locore.h b/i386/i386/locore.h index 4388ea28..374c8cf9 100644 --- a/i386/i386/locore.h +++ b/i386/i386/locore.h @@ -48,7 +48,7 @@ extern int call_continuation (continuation_t continuation); extern int discover_x86_cpu_type (void); extern int copyin (const void *userbuf, void *kernelbuf, size_t cn); -extern int copyinmsg (const void *userbuf, void *kernelbuf, size_t cn); +extern int copyinmsg (const void *userbuf, void *kernelbuf, size_t cn, size_t kn); extern int copyout (const void *kernelbuf, void *userbuf, size_t cn); extern int copyoutmsg (const void *kernelbuf, void *userbuf, size_t cn); |