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linux/drivers/slimbus
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Visweswara Tanuku dcb0d43ba8 slimbus: messaging: Free transaction ID in delayed interrupt scenario 
In case of interrupt delay for any reason, slim_do_transfer()
returns timeout error but the transaction ID (TID) is not freed.
This results into invalid memory access inside
qcom_slim_ngd_rx_msgq_cb() due to invalid TID.

Fix the issue by freeing the TID in slim_do_transfer() before
returning timeout error to avoid invalid memory access.

Call trace:
__memcpy_fromio+0x20/0x190
qcom_slim_ngd_rx_msgq_cb+0x130/0x290 [slim_qcom_ngd_ctrl]
vchan_complete+0x2a0/0x4a0
tasklet_action_common+0x274/0x700
tasklet_action+0x28/0x3c
_stext+0x188/0x620
run_ksoftirqd+0x34/0x74
smpboot_thread_fn+0x1d8/0x464
kthread+0x178/0x238
ret_from_fork+0x10/0x20
Code: aa0003e8 91000429 f100044a 3940002b (3800150b)
---[ end trace 0fe00bec2b975c99 ]---
Kernel panic - not syncing: Oops: Fatal exception in interrupt.

Fixes: afbdcc7c38 ("slimbus: Add messaging APIs to slimbus framework")
Cc: stable <stable@kernel.org>
Signed-off-by: Visweswara Tanuku <quic_vtanuku@quicinc.com>
Link: https://lore.kernel.org/r/20250124125740.16897-1-quic_vtanuku@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-02-20 15:19:51 +01:00
..
core.c slimbus: core: Remove of_slim_match_dev() 2025-01-03 11:19:35 +01:00
Kconfig slimbus: qcom-ngd: Fix build error when CONFIG_SLIM_QCOM_NGD_CTRL=y && CONFIG_QCOM_RPROC_COMMON=m 2022-11-10 18:45:40 +01:00
Makefile
messaging.c slimbus: messaging: Free transaction ID in delayed interrupt scenario 2025-02-20 15:19:51 +01:00
qcom-ctrl.c Get rid of 'remove_new' relic from platform driver struct 2024-12-01 15:12:43 -08:00
qcom-ngd-ctrl.c Get rid of 'remove_new' relic from platform driver struct 2024-12-01 15:12:43 -08:00
sched.c
slimbus.h
stream.c slimbus: Fix struct and documentation alignment in stream.c 2024-07-05 10:13:04 +02:00