David Hildenbrand <david@xxxxxxxxxx> writes: > On 19.09.23 22:51, Stefan Roesch wrote: >> A process can enable KSM with the prctl system call. When the process is >> forked the KSM flag is inherited by the child process. However if the >> process is executing an exec system call directly after the fork, the >> KSM setting is cleared. This patch addresses this problem. >> Signed-off-by: Stefan Roesch <shr@xxxxxxxxxxxx> >> Reported-by: Carl Klemm <carl@xxxxxxxx> >> --- >> include/linux/sched/coredump.h | 7 +++++-- >> 1 file changed, 5 insertions(+), 2 deletions(-) >> diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h >> index 0ee96ea7a0e9..205aa9917394 100644 >> --- a/include/linux/sched/coredump.h >> +++ b/include/linux/sched/coredump.h >> @@ -87,8 +87,11 @@ static inline int get_dumpable(struct mm_struct *mm) >> #define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP) >> +#define MMF_VM_MERGE_ANY 29 >> +#define MMF_VM_MERGE_ANY_MASK (1 << MMF_VM_MERGE_ANY) >> + >> #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\ >> - MMF_DISABLE_THP_MASK | MMF_HAS_MDWE_MASK) >> + MMF_DISABLE_THP_MASK | MMF_HAS_MDWE_MASK |\ >> + MMF_VM_MERGE_ANY_MASK) >> -#define MMF_VM_MERGE_ANY 29 >> #endif /* _LINUX_SCHED_COREDUMP_H */ > > Fixes: tag? > Added fixes tag > Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
