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| author | Stefan Haberland <sth@linux.ibm.com> | 2026-08-05 13:16:12 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-08-05 06:32:27 -0600 |
| commit | a600051da14b4cacc7b00685c967f40b0425ef5b (patch) | |
| tree | 89daec8f769549469ec4c39ad4baab95f7130c84 /tools/perf/scripts/python/bin/export-to-postgresql-record | |
| parent | 04ea1579bc7707366de1d642115ad3b65c6171e1 (diff) | |
s390/dasd: Read cached unit address and LSS in the CCW build path
The CCW build path (prefix_LRE, the full-track prefix and dso_ras) read the
base address and LSS straight from conf.ned. That buffer is freed and
reallocated by the reload worker (do_reload_device - dasd_eckd_read_conf -
dasd_eckd_clear_conf_data), so a configuration change concurrent with I/O
can free conf.ned while a request is being built.
Use-after-free reported by KASAN in prefix_LRE.
Read the cached copies instead.
The unit address is already kept in uid.real_unit_addr, and the LSS is now
cached in ned_lss. Both are refreshed under the ccwdev lock in
dasd_eckd_generate_uid whenever the configuration is (re)read.
Also fix for prepare for read subsystem data (prssd) users.
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://patch.msgid.link/20260805111612.1285190-20-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/bin/export-to-postgresql-record')
0 files changed, 0 insertions, 0 deletions