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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2016-06-04 02:09:22 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-31 13:05:40 +0200 |
| commit | a9f61ca793becabdefab03b77568d6c6f8c1bc79 (patch) | |
| tree | 422f0e2eb47880341e6ebe69a1afa918458c4dd4 /drivers/block/zram | |
| parent | tile-srom: avoid krealloc(... __GFP_ZERO) pattern (diff) | |
| download | linux-a9f61ca793becabdefab03b77568d6c6f8c1bc79.tar.xz linux-a9f61ca793becabdefab03b77568d6c6f8c1bc79.zip | |
Drivers: hv: avoid vfree() on crash
When we crash from NMI context (e.g. after NMI injection from host when
'sysctl -w kernel.unknown_nmi_panic=1' is set) we hit
kernel BUG at mm/vmalloc.c:1530!
as vfree() is denied. While the issue could be solved with in_nmi() check
instead I opted for skipping vfree on all sorts of crashes to reduce the
amount of work which can cause consequent crashes. We don't really need to
free anything on crash.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/block/zram')
0 files changed, 0 insertions, 0 deletions