| Summary: | sys/dev/xl/if_xl.c: A possible sleep-under-mutex bug in xl_list_rx_init | ||
|---|---|---|---|
| Product: | Base System | Reporter: | Jia-Ju Bai <baijiaju1990> |
| Component: | kern | Assignee: | freebsd-bugs (Nobody) <bugs> |
| Status: | New --- | ||
| Severity: | Affects Only Me | CC: | net |
| Priority: | --- | ||
| Version: | CURRENT | ||
| Hardware: | Any | ||
| OS: | Any | ||
The driver may sleep under a mutex, and the function call path is: xl_resume [acquire the mutex] xl_init_locked xl_list_rx_init bus_dmamap_create(BUS_DMA_WAITOK) --> may sleep The possible fix of this bug is to replace the "BUS_DMA_WAITOK" in bus_dmamap_create with "BUS_DMA_NOWAIT". This bug is found by a static analysis tool written by myself, and it is checked by my review of the FreeBSD code.