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When opening /dev/snapshot device, snapshot_open() creates memory bitmaps which are freed in snapshot_release(). But if any of the callbacks called by pm_notifier_call_chain() returns NOTIFY_BAD, open() fails, snapshot_release() is never called and bitmaps are not freed. Next attempt to open /dev/snapshot then triggers BUG_ON() check in create_basic_memory_bitmaps(). This happens e.g. when vmwatchdog module is active on s390x. Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: stable@kernel.org |
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.. | ||
block_io.c | ||
console.c | ||
hibernate.c | ||
Kconfig | ||
main.c | ||
Makefile | ||
power.h | ||
poweroff.c | ||
process.c | ||
snapshot.c | ||
suspend_test.c | ||
suspend.c | ||
swap.c | ||
user.c |