cb->disable_intr may not be set yet when myrb_cleanup is called. check before using this function pointer.
[ 1.410913] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 1.411273] #PF: supervisor instruction fetch in kernel mode [ 1.411566] #PF: error_code(0x0010) - not-present page [ 1.413138] RIP: 0010:0x0 [ 1.417711] myrb_cleanup+0x13f/0x1b0 [myrb] [ 1.417939] myrb_probe.cold+0xc6/0x6fc [myrb] Signed-off-by: Tong Zhang <[email protected]> --- drivers/scsi/myrb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/myrb.c b/drivers/scsi/myrb.c index 3d8e91c07dc7..ee33d97fb92c 100644 --- a/drivers/scsi/myrb.c +++ b/drivers/scsi/myrb.c @@ -1240,7 +1240,8 @@ static void myrb_cleanup(struct myrb_hba *cb) myrb_unmap(cb); if (cb->mmio_base) { - cb->disable_intr(cb->io_base); + if (cb->disable_intr) + cb->disable_intr(cb->io_base); iounmap(cb->mmio_base); } if (cb->irq) -- 2.25.1
