AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/drivers/infiniband/core
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Roland Dreier 24bce50803 IB/umem: Fix possible hang on process exit 
If ib_umem_release() is called after ib_uverbs_close() sets context->closing,
then a process can get stuck in a D state, because the code boils down to

	if (down_write_trylock(&mm->mmap_sem))
		down_write(&mm->mmap_sem);

which is obviously a stupid instant deadlock.  Fix the code so that we
only try to take the lock once.

This bug was introduced in commit f7c6a7b5 ("IB/uverbs: Export
ib_umem_get()/ib_umem_release() to modules") which fortunately never
made it into a release, and was reported by Pete Wyckoff <pw@osc.edu>.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2007-06-21 11:05:58 -07:00
..
addr.c IB: Remove redundant "_wq" from workqueue names 2007-02-10 08:00:50 -08:00
agent.c IB/mad: Simplify SMI by eliminating smi_check_local_dr_smp() 2006-03-20 10:08:11 -08:00
agent.h [PATCH] missing include in infiniband 2005-10-29 10:35:07 -07:00
cache.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
cm_msgs.h [IB] cm: Add missing break in switch 2005-10-20 12:29:36 -07:00
cm.c IB/cm: Fix stale connection detection 2007-05-29 16:07:09 -07:00
cma.c RDMA/cma: Fix initialization of next_port 2007-06-07 23:24:38 -07:00
core_priv.h [PATCH] IB: move include files to include/rdma 2005-08-26 20:37:38 -07:00
device.c Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband 2007-05-21 16:19:32 -07:00
fmr_pool.c IB/fmr_pool: Add prefix to all printks 2007-05-06 21:18:11 -07:00
iwcm.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
iwcm.h RDMA: iWARP Connection Manager. 2006-09-22 15:22:46 -07:00
mad_priv.h PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
mad_rmpp.c WorkStruct: make allyesconfig 2006-11-22 14:57:56 +00:00
mad_rmpp.h [IB] Fix MAD layer DMA mappings to avoid touching data buffer once mapped 2005-10-25 10:51:39 -07:00
mad.c IB: Add CQ comp_vector support 2007-05-06 21:18:11 -07:00
Makefile IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules 2007-05-08 18:00:37 -07:00
multicast.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
packer.c [PATCH] fix remaining missing includes 2005-11-07 07:53:41 -08:00
sa_query.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
sa.h IB/sa: Track multicast join/leave requests 2007-02-16 14:20:02 -08:00
smi.c IB/mad: Change SMI to use enums rather than magic return codes 2007-04-24 16:31:12 -07:00
smi.h IB/mad: Change SMI to use enums rather than magic return codes 2007-04-24 16:31:12 -07:00
sysfs.c IB: Set class_dev->dev in core for nice device symlink 2007-04-24 21:30:38 -07:00
ucm.c IB/ucm: Simplify ib_ucm_event() 2007-04-24 16:31:11 -07:00
ucma.c RDMA/ucma: Simplify ucma_get_event() 2007-04-24 16:31:11 -07:00
ud_header.c [PATCH] fix remaining missing includes 2005-11-07 07:53:41 -08:00
umem.c IB/umem: Fix possible hang on process exit 2007-06-21 11:05:58 -07:00
user_mad.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
uverbs_cmd.c IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules 2007-05-08 18:00:37 -07:00
uverbs_main.c IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules 2007-05-08 18:00:37 -07:00
uverbs_marshall.c RDMA/cma: Export rdma cm interface to userspace 2006-12-12 11:50:22 -08:00
uverbs.h IB/uverbs: Export ib_umem_get()/ib_umem_release() to modules 2007-05-08 18:00:37 -07:00
verbs.c IB: Add CQ comp_vector support 2007-05-06 21:18:11 -07:00