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author | Zijun Hu <quic_zijuhu@quicinc.com> | 2024-10-29 18:13:38 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-05 15:31:16 +0300 |
commit | 498dbd9aea205db9da674994b74c7bf8e18448bd (patch) | |
tree | 227da538643e874a8f96b2c8e8e8f7c8f28d1e82 /tools/perf/scripts/python/syscall-counts-by-pid.py | |
parent | 59b723cd2adbac2a34fc8e12c74ae26ae45bf230 (diff) | |
download | linux-498dbd9aea205db9da674994b74c7bf8e18448bd.tar.xz |
usb: musb: sunxi: Fix accessing an released usb phy
Commit 6ed05c68cbca ("usb: musb: sunxi: Explicitly release USB PHY on
exit") will cause that usb phy @glue->xceiv is accessed after released.
1) register platform driver @sunxi_musb_driver
// get the usb phy @glue->xceiv
sunxi_musb_probe() -> devm_usb_get_phy().
2) register and unregister platform driver @musb_driver
musb_probe() -> sunxi_musb_init()
use the phy here
//the phy is released here
musb_remove() -> sunxi_musb_exit() -> devm_usb_put_phy()
3) register @musb_driver again
musb_probe() -> sunxi_musb_init()
use the phy here but the phy has been released at 2).
...
Fixed by reverting the commit, namely, removing devm_usb_put_phy()
from sunxi_musb_exit().
Fixes: 6ed05c68cbca ("usb: musb: sunxi: Explicitly release USB PHY on exit")
Cc: stable@vger.kernel.org
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/20241029-sunxi_fix-v1-1-9431ed2ab826@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions