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| author | Sebastian Andrzej Siewior <[email protected]> | 2025-06-23 08:34:08 +0000 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2025-06-23 12:50:37 +0000 |
| commit | a24cc6ce1933eade12aa2b9859de0fcd2dac2c06 (patch) | |
| tree | 9c537c581261c9995b89e8cd77d4a8eb7c896bc0 /lib/crypto/mpi/mpi-cmp.c | |
| parent | Linux 6.16-rc3 (diff) | |
| download | kernel-a24cc6ce1933eade12aa2b9859de0fcd2dac2c06.tar.gz kernel-a24cc6ce1933eade12aa2b9859de0fcd2dac2c06.zip | |
futex: Initialize futex_phash_new during fork().
During a hash resize operation the new private hash is stored in
mm_struct::futex_phash_new if the current hash can not be immediately
replaced.
The new hash must not be copied during fork() into the new task. Doing
so will lead to a double-free of the memory by the two tasks.
Initialize the mm_struct::futex_phash_new during fork().
Closes: https://lore.kernel.org/all/[email protected]/
Fixes: bd54df5ea7cad ("futex: Allow to resize the private local hash")
Reported-by: Calvin Owens <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Calvin Owens <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'lib/crypto/mpi/mpi-cmp.c')
0 files changed, 0 insertions, 0 deletions