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| /freebsd-11-stable/sys/ufs/ufs/ | ||
| H A D | ufs_dirhash.c | diff 195003 Thu Jun 25 18:47:41 MDT 2009 snb Fix a bug reported by pho@ where one can induce a panic by decreasing vfs.ufs.dirhash_maxmem below the current amount of memory used by dirhash. When ufsdirhash_build() is called with the memory in use greater than dirhash_maxmem, it attempts to free up memory by calling ufsdirhash_recycle(). If successful in freeing enough memory, ufsdirhash_recycle() leaves the dirhash list locked. But at this point in ufsdirhash_build(), the list is not explicitly unlocked after the call(s) to ufsdirhash_recycle(). When we next attempt to lock the dirhash list, we will get a "panic: _mtx_lock_sleep: recursed on non-recursive mutex dirhash list". Tested by: pho Approved by: dwmalone (mentor) MFC after: 3 weeks |
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