diff options
| author | Stefan Haberland <[email protected]> | 2022-09-19 17:49:31 +0200 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2022-09-19 10:19:28 -0600 |
| commit | db7ba07108a48c0f95b74fabbfd5d63e924f992d (patch) | |
| tree | 3ba723850d796ba33f7680f38dbea2eba1340791 /drivers/net/wwan/iosm/iosm_ipc_mux.c | |
| parent | c4fa368466cc1b60bb92f867741488930ddd6034 (diff) | |
s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup
Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup
pointer being NULL.
The pavgroup pointer is checked on the entrance of the function but
without the lcu->lock being held. Therefore there is a race window
between dasd_alias_get_start_dev() and _lcu_update() which sets
pavgroup to NULL with the lcu->lock held.
Fix by checking the pavgroup pointer with lcu->lock held.
Cc: <[email protected]> # 2.6.25+
Fixes: 8e09f21574ea ("[S390] dasd: add hyper PAV support to DASD device driver, part 1")
Signed-off-by: Stefan Haberland <[email protected]>
Reviewed-by: Jan Hoeppner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'drivers/net/wwan/iosm/iosm_ipc_mux.c')
0 files changed, 0 insertions, 0 deletions