IPoIB: In unicast_arp_send(), only free newly-created paths

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If path_rec_start() returns error, call path_free() only if the path
was newly-created.  If we free an existing path whose valid flag was zero,
(but do not detach it from the list) we cause corruption of the
path list (of which it is a member), and get a kernel crash.

The simplest solution is to not free an existing path -- just leave it
in the list as-is (i.e., with its valid flag cleared).

Thanks to Yossi Etigin of Voltaire for identifying the problem flow
which caused the kernel crash.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Moni Shua <monis@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

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Jack Morgenstein 2009-02-17 14:51:47 -08:00 • committed by Roland Dreier

parent f3b8436ad9

commit 71d98b4628

1 changed files with 7 additions and 2 deletions

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drivers/infiniband/ulp/ipoib/ipoib_main.c

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