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/linux/drivers/infiniband/ulp/srp/ |
H A D | ib_srp.c | diff 1fe0cb848890a3f4dd965fdce8b4108feb03971f Wed Jun 12 15:20:36 CEST 2013 Dotan Barak <dotanb@dev.mellanox.co.il> IB/srp: Fix remove_one crash due to resource exhaustion
If the add_one callback fails during driver load no resources are allocated so there isn't a need to release any resources. Trying to clean the resource may lead to the following kernel panic:
BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffffa0132331>] srp_remove_one+0x31/0x240 [ib_srp] RIP: 0010:[<ffffffffa0132331>] [<ffffffffa0132331>] srp_remove_one+0x31/0x240 [ib_srp] Process rmmod (pid: 4562, threadinfo ffff8800dd738000, task ffff8801167e60c0) Call Trace: [<ffffffffa024500e>] ib_unregister_client+0x4e/0x120 [ib_core] [<ffffffffa01361bd>] srp_cleanup_module+0x15/0x71 [ib_srp] [<ffffffff810ac6a4>] sys_delete_module+0x194/0x260 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il> Reviewed-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Acked-by: Sebastian Riemer <sebastian.riemer@profitbricks.com> Acked-by: David Dillow <dillowda@ornl.gov> Signed-off-by: Roland Dreier <roland@purestorage.com>
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