The patch titled
kexec: fix OOPS in crash_kernel_shrink
has been removed from the -mm tree. Its filename was
kexec-fix-oops-in-crash_kernel_shrink.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: kexec: fix OOPS in crash_kernel_shrink
From: Vitaly Mayatskikh <v.mayatskih@xxxxxxxxx>
Two "echo 0 > /sys/kernel/kexec_crash_size" OOPSes kernel. Also content
of this file is invalid after first shrink to zero: it shows 1 instead of
0.
This scenario is unlikely to happen often (root privs, valid crashkernel=
in cmdline, dump-capture kernel not loaded), I hit it only by chance.
This patch fixes it.
Signed-off-by: Vitaly Mayatskikh <v.mayatskih@xxxxxxxxx>
Cc: Cong Wang <amwang@xxxxxxxxxx>
Cc: Neil Horman <nhorman@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kexec.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff -puN kernel/kexec.c~kexec-fix-oops-in-crash_kernel_shrink kernel/kexec.c
--- a/kernel/kexec.c~kexec-fix-oops-in-crash_kernel_shrink
+++ a/kernel/kexec.c
@@ -1134,11 +1134,9 @@ int crash_shrink_memory(unsigned long ne
free_reserved_phys_range(end, crashk_res.end);
- if (start == end) {
- crashk_res.end = end;
+ if (start == end)
release_resource(&crashk_res);
- } else
- crashk_res.end = end - 1;
+ crashk_res.end = end - 1;
unlock:
mutex_unlock(&kexec_mutex);
_
Patches currently in -mm which might be from v.mayatskih@xxxxxxxxx are
origin.patch
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