* [REPORT] net: e100: possible data races
@ 2018-10-03 13:03 Jia-Ju Bai
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From: Jia-Ju Bai @ 2018-10-03 13:03 UTC (permalink / raw)
To: jeffrey.t.kirsher, davem
Cc: intel-wired-lan, netdev, Linux Kernel Mailing List
CPU0:
e100_set_multicast_list
e100_exec_cb
line 854: spin_lock_irqsave()
line 866: e100_configure (function pointer)
line 1114: nic->flags [READ]
line 1123: nic->flags [READ]
CPU1:
e100_watchdog
line 1731: nic->flags [WRITE]
line 1733: nic->flags [WRITE]
As for nic->flags, the WRITE operations in CPU0 are performed
with holding a spinlock, but the READ operations in CPU1 are performed
without holding this spinlock, so there may exist data races.
These possible races are detected by a runtime testing.
I do not find a good way to fix these races, so I only report them.
Best wishes,
Jia-Ju Bai
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2018-10-03 13:03 [REPORT] net: e100: possible data races Jia-Ju Bai
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