[SCSI] megaraid_sas: Fix instance access in megasas_reset_timer

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The following patch for megaraid_sas will fix a potential bad pointer access
in megasas_reset_timer(), when a MegaRAID 9265/9285 or 9360/9380 gets a
timeout.  megasas_build_io_fusion() sets SCp.ptr to be a struct
megasas_cmd_fusion *, but then megasas_reset_timer() was casting SCp.ptr to be
a struct megasas_cmd *, then trying to access cmd->instance, which is invalid.

Just loading instance from scmd->device->host->hostdata in
megasas_reset_timer() fixes the issue.

Signed-off-by: Adam Radford <aradford@gmail.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

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adam radford 2011-10-13 16:01:12 -07:00 • committed by James Bottomley

parent fba63097b8

commit f575c5d3eb

1 changed files with 1 additions and 2 deletions

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drivers/scsi/megaraid/megaraid_sas_base.c

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