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Salah Triki b1d4e6fb24 s390/cio: Fix device lifecycle handling in css_alloc_subchannel() ... [ Upstream commit f65c75b0b9 ] `css_alloc_subchannel()` calls `device_initialize()` before setting up the DMA masks. If `dma_set_coherent_mask()` or `dma_set_mask()` fails, the error path frees the subchannel structure directly, bypassing the device model reference counting. Once `device_initialize()` has been called, the embedded struct device must be released via `put_device()`, allowing the release callback to free the container structure. Fix the error path by dropping the initial device reference with `put_device()` instead of calling `kfree()` directly. This ensures correct device lifetime handling and avoids potential use-after-free or double-free issues. Fixes: e5dcf0025d ("s390/css: move subchannel lock allocation") Signed-off-by: Salah Triki <salah.triki@gmail.com> Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-03-04 07:19:23 -05:00
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block	s390/dasd: fix error recovery leading to data corruption on ESE devices	2024-09-04 13:23:15 +02:00
char	s390/tty: Fix a potential memory leak bug	2025-05-02 07:44:34 +02:00
cio	s390/cio: Fix device lifecycle handling in css_alloc_subchannel()	2026-03-04 07:19:23 -05:00
crypto	s390/ap: Don't leak debug feature files if AP instructions are not available	2026-01-19 13:09:24 +01:00
net	s390/ctcm: Fix double-kfree	2025-12-07 06:09:31 +09:00
scsi	scsi: s390: zfcp: Ensure synchronous unit_add	2025-06-27 11:05:34 +01:00
virtio	virtio/s390: get rid of open-coded kvm hypercall	2021-06-28 11:18:28 +02:00
Makefile	s390: remove pointless drivers-y in drivers/s390/Makefile	2019-09-16 13:21:51 +02:00