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| /freebsd-current/sys/kern/ | ||
| H A D | sys_pipe.c | diff f5252370 Sun Dec 12 19:55:47 MST 1999 Tor Egge <tegge@FreeBSD.org> Fix two problems with pipe_write(): 1. Data written beyond end of pipe buffer, causing kernel memory corruption. - Check that space is still valid after obtaining the pipe lock. - Defer the calculation of transfer size until the pipe lock has been obtained. - Update the pipe buffer pointers while holding the pipe lock. 2. Writes of size <= PIPE_BUF not always atomic. - Allow an internal write to span two contiguous segments, so writes of size <= PIPE_BUF can be kept atomic when wrapping around from the end to the start of the pipe buffer. PR: 15235 Reviewed by: Matt Dillon <dillon@FreeBSD.org> |
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