diff options
| author | Zilin Guan <[email protected]> | 2025-11-05 02:29:23 +0000 |
|---|---|---|
| committer | Christian Brauner <[email protected]> | 2025-11-05 13:00:16 +0000 |
| commit | 90f601b497d76f40fa66795c3ecf625b6aced9fd (patch) | |
| tree | 9b0c9869cd10acee9c1fc71f817df2b1d8554e2b /lib/mpi/mpi-mpow.c | |
| parent | virtio-fs: fix incorrect check for fsvq->kobj (diff) | |
| download | kernel-90f601b497d76f40fa66795c3ecf625b6aced9fd.tar.gz kernel-90f601b497d76f40fa66795c3ecf625b6aced9fd.zip | |
binfmt_misc: restore write access before closing files opened by open_exec()
bm_register_write() opens an executable file using open_exec(), which
internally calls do_open_execat() and denies write access on the file to
avoid modification while it is being executed.
However, when an error occurs, bm_register_write() closes the file using
filp_close() directly. This does not restore the write permission, which
may cause subsequent write operations on the same file to fail.
Fix this by calling exe_file_allow_write_access() before filp_close() to
restore the write permission properly.
Fixes: e7850f4d844e ("binfmt_misc: fix possible deadlock in bm_register_write")
Signed-off-by: Zilin Guan <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Christian Brauner <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-mpow.c')
0 files changed, 0 insertions, 0 deletions