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authorT Makphaibulchoke <tmac@hp.com>2012-10-04 17:16:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-06 03:05:31 +0900
commit4965f5667f36a95b41cda6638875bc992bd7d18b (patch)
tree554062719fbe5754197e1042024cceab1db4ddae /include/ras
parentc99b6841d74a5c7d3698cc2a3ec44241fe64b769 (diff)
kernel/resource.c: fix stack overflow in __reserve_region_with_split()
Using a recursive call add a non-conflicting region in __reserve_region_with_split() could result in a stack overflow in the case that the recursive calls are too deep. Convert the recursive calls to an iterative loop to avoid the problem. Tested on a machine containing 135 regions. The kernel no longer panicked with stack overflow. Also tested with code arbitrarily adding regions with no conflict, embedding two consecutive conflicts and embedding two non-consecutive conflicts. Signed-off-by: T Makphaibulchoke <tmac@hp.com> Reviewed-by: Ram Pai <linuxram@us.ibm.com> Cc: Paul Gortmaker <paul.gortmaker@gmail.com> Cc: Wei Yang <weiyang@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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