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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-02-14 21:56:30 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2017-02-19 17:51:52 +0300 |
| commit | 6cb72bc1b40bb2c1750ee7a5ebade93bed49a5fb (patch) | |
| tree | 36444ca18a6ca4c8e42b2dc4dec49f6a4befea28 /.get_maintainer.ignore | |
| parent | d6c58dc40fec35ff6cdb350b53bce0fcf9143709 (diff) | |
| download | linux-6cb72bc1b40bb2c1750ee7a5ebade93bed49a5fb.tar.xz | |
IB/srp: Avoid that duplicate responses trigger a kernel bug
After srp_process_rsp() returns there is a short time during which
the scsi_host_find_tag() call will return a pointer to the SCSI
command that is being completed. If during that time a duplicate
response is received, avoid that the following call stack appears:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: srp_recv_done+0x450/0x6b0 [ib_srp]
Oops: 0000 [#1] SMP
CPU: 10 PID: 0 Comm: swapper/10 Not tainted 4.10.0-rc7-dbg+ #1
Call Trace:
<IRQ>
__ib_process_cq+0x4b/0xd0 [ib_core]
ib_poll_handler+0x1d/0x70 [ib_core]
irq_poll_softirq+0xba/0x120
__do_softirq+0xba/0x4c0
irq_exit+0xbe/0xd0
smp_apic_timer_interrupt+0x38/0x50
apic_timer_interrupt+0x90/0xa0
</IRQ>
RIP: srp_recv_done+0x450/0x6b0 [ib_srp] RSP: ffff88046f483e20
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Israel Rukshin <israelr@mellanox.com>
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Steve Feeley <Steve.Feeley@sandisk.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to '.get_maintainer.ignore')
0 files changed, 0 insertions, 0 deletions