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powerpc/fadump: Account for memory_limit while reserving memory

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commit 9a2921e5baca1d25eb8d21f21d1e90581a6d0f68 upstream.

If the memory chunk found for reserving memory overshoots the memory
limit imposed, do not proceed with reserving memory. Default behavior
was this until commit 140777a3d8df ("powerpc/fadump: consider reserved
ranges while reserving memory") changed it unwittingly.

Fixes: 140777a3d8df ("powerpc/fadump: consider reserved ranges while reserving memory")
Cc: stable@vger.kernel.org
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/159057266320.22331.6571453892066907320.stgit@hbathini.in.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hari Bathini 2020-05-27 15:14:35 +05:30 committed by Greg Kroah-Hartman
parent 6fd930da24
commit 6d9cc26aa1
1 changed files with 1 additions and 1 deletions
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arch/powerpc/kernel/fadump.c
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@ -601,7 +601,7 @@ int __init fadump_reserve_mem(void)
*/
base = fadump_locate_reserve_mem(base, size);
if (!base) {
if (!base || (base + size > mem_boundary)) {
pr_err("Failed to find memory chunk for reservation!\n");
goto error_out;
}