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SubjectRe: [GIT PULL] first round of SCSI updates for the 4.6+ merge window
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Hi all,

On 05/18/2016 07:19 AM, James Bottomley wrote:
> Douglas Gilbert (13):
> scsi_debug: use locally assigned naa
> scsi_debug: uuid for lu name
> scsi_debug: vpd and mode page work
> scsi_debug: add multiple queue support
> scsi_debug: rework resp_report_luns

The commit above seems to be causing the following:

[ 784.130990] BUG: sleeping function called from invalid context at mm/slab.h:388

[ 784.131073] in_atomic(): 1, irqs_disabled(): 0, pid: 21582, name: syz-executor

[ 784.131216] Preemption disabled blk_mq_insert_request (block/blk-mq.h:89 block/blk-mq.c:1010)
[ 784.131252]
[ 784.131292] CPU: 4 PID: 21582 Comm: syz-executor Tainted: G B 4.6.0-next-20160527-sasha-00024-g6ab0dc9-dirty #3098

[ 784.131336] 1ffff100369e8e06 0000000085bb6488 ffff8801b4f470b8 ffffffffa0fd0b37

[ 784.131367] ffffffff00000004 fffffbfff57eeda4 0000000041b58ab3 ffffffffab8dd830

[ 784.131391] ffffffffa0fd09c8 ffff8801b4f47060 ffffffff9f53ef7a 00007f4739889c18

[ 784.131396] Call Trace:
[ 784.131443] dump_stack (lib/dump_stack.c:53)
[ 784.131609] ___might_sleep (kernel/sched/core.c:7554)
[ 784.131637] __might_sleep (kernel/sched/core.c:7516 (discriminator 14))
[ 784.131706] kmem_cache_alloc_node (mm/slab.h:390 mm/slub.c:2498 mm/slub.c:2608)
[ 784.131761] __get_vm_area_node (include/linux/slab.h:390 include/linux/slab.h:516 include/linux/slab.h:633 mm/vmalloc.c:1370)
[ 784.131778] __vmalloc_node_range (mm/vmalloc.c:1688)
[ 784.131941] vmalloc (mm/vmalloc.c:1766)
[ 784.131974] resp_report_luns (drivers/scsi/scsi_debug.c:3335)
[ 784.132010] scsi_debug_queuecommand (drivers/scsi/scsi_debug.c:5362)
[ 784.132109] scsi_dispatch_cmd (drivers/scsi/scsi_lib.c:1635)
[ 784.132125] scsi_queue_rq (drivers/scsi/scsi_lib.c:1924)
[ 784.132185] __blk_mq_run_hw_queue (block/blk-mq.c:784)
[ 784.132315] blk_mq_run_hw_queue (block/blk-mq.c:874)
[ 784.132340] blk_mq_insert_request (block/blk-mq.h:94 block/blk-mq.c:1023)
[ 784.132359] blk_execute_rq_nowait (block/blk-exec.c:69)
[ 784.132390] sg_common_write.isra.5 (drivers/scsi/sg.c:812)
[ 784.132490] sg_write (drivers/scsi/sg.c:687)
[ 784.132679] __vfs_write (fs/read_write.c:514)
[ 784.132815] vfs_write (fs/read_write.c:565)
[ 784.132830] SyS_write (fs/read_write.c:612 fs/read_write.c:603)
[ 784.132929] do_syscall_64 (arch/x86/entry/common.c:350)
[ 784.132947] entry_SYSCALL64_slow_path (arch/x86/entry/entry_64.S:251)


Thanks,
Sasha

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