diff options
| author | T Makphaibulchoke <tmac@hp.com> | 2012-10-04 17:16:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-14 10:48:53 -0800 |
| commit | 7308f843f36c30dd1247989a45611760567ea44f (patch) | |
| tree | c3a157484b1412916b23a9a9a21a7836e1459089 /kernel/rwsem.c | |
| parent | 0b2d4e113bf714732b041aa879945c4c5ae4b139 (diff) | |
kernel/resource.c: fix stack overflow in __reserve_region_with_split()
commit 4965f5667f36a95b41cda6638875bc992bd7d18b upstream.
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>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/rwsem.c')
0 files changed, 0 insertions, 0 deletions