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| author | T Makphaibulchoke <tmac@hp.com> | 2012-10-05 02:16:55 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-05 20:05:31 +0200 |
| commit | 4965f5667f36a95b41cda6638875bc992bd7d18b (patch) | |
| tree | 554062719fbe5754197e1042024cceab1db4ddae /lib/flex_array.c | |
| parent | omfs: convert to use beXX_add_cpu() (diff) | |
| download | linux-4965f5667f36a95b41cda6638875bc992bd7d18b.tar.xz linux-4965f5667f36a95b41cda6638875bc992bd7d18b.zip | |
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>
Diffstat (limited to 'lib/flex_array.c')
0 files changed, 0 insertions, 0 deletions