net: mctp: i3c: serialize probe with bus removal

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mctp_i3c_probe() drops busdevs_lock after finding the matching bus. A
concurrent I3C_NOTIFY_BUS_REMOVE can then unregister and free the bus
netdev before probe passes its private data to mctp_i3c_add_device().
The latter consequently adds a list node through a freed mbus pointer.

Keep busdevs_lock held until the device has been added. This also
satisfies the __must_hold annotation on mctp_i3c_add_device().

Fixes: c8755b29b5 ("mctp i3c: MCTP I3C driver")
Signed-off-by: XingWang Xiang <v3rdant.xiang@gmail.com>
Acked-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

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XingWang Xiang 2026-09-02 15:01:18 +09:00 • committed by David S. Miller

parent 80dd7e754b

commit 2b4707a149

1 changed files with 6 additions and 3 deletions

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drivers/net/mctp/mctp-i3c.c

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